{"product_id":"3265bq-25a-wayne-kerr-dc-bias-unit-new","title":"3265BQ\/25A Wayne Kerr DC Bias Unit New","description":"\u003cdiv class=\"product-body\" style=\"text-align:left; font-family:Arial, Helvetica, sans-serif; line-height:1.55; max-width:980px; color:#222;\"\u003e\n\u003ch2 style=\"display:block; clear:both; text-align:left; font-size:22px; color:#1a1a1a; margin:28px 0 12px 0;\"\u003eWayne Kerr 3265BQ\/25A DC Bias Unit — Key Features at a Glance\u003c\/h2\u003e\n\u003caside style=\"border:2px solid #c9a227; background:#fffbe6; padding:16px 20px; margin:16px 0 24px 0; border-radius:4px; clear:both; text-align:left;\"\u003e\u003cul style=\"list-style:disc; text-align:left; clear:both; margin:0 0 16px 24px; padding:0;\"\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eDC bias current:\u003c\/strong\u003e up to 25 A, set in 25 mA steps (single-unit configuration)\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eCompatible analyzers:\u003c\/strong\u003e 3260B Precision Magnetics Analyzer (extended 3 MHz operation), 3255BQ, 3255B Inductance Analyzers\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eParallel operation:\u003c\/strong\u003e up to five 3265B units may be connected in parallel to deliver up to 125 A DC bias current (50 A maximum when paralleled on the 3255BL)\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eMaximum compliance voltage:\u003c\/strong\u003e 11 V DC at 0.25 V AC drive level; 10 V at 1 V AC drive level (f \u0026gt; 12 kHz deduct 0.5 V)\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eVariables measured (impedance mode):\u003c\/strong\u003e L, Z, R, Q, D\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eBasic accuracy:\u003c\/strong\u003e ± 1% (varies with measurement speed, frequency and options chosen)\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eSafety \u0026amp; protection:\u003c\/strong\u003e bias safety interlock socket, 1.6 A measurement-terminal fuses, over-temperature trip, and protection against excess voltage drop and sense lead failure\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003e\n\u003cstrong\u003eOrder code:\u003c\/strong\u003e 1J3265BQ\/25A\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/aside\u003e\u003cp style=\"text-align:left; margin:8px 0 18px 0; font-size:12px; color:#666;\"\u003e\u003clabel style=\"cursor:pointer;\"\u003e\u003cinput type=\"checkbox\" style=\"margin-right:6px; vertical-align:middle;\"\u003e Processed \/ reviewed\u003c\/label\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eIn summary, the Wayne Kerr 3265BQ\/25A is a 25 A DC Bias Unit, an ancillary instrument used in conjunction with Wayne Kerr 3255B-series Inductance Analyzers and the 3260B Precision Magnetics Analyzer. It delivers DC bias current to a wound component under test — inductors, transformers, and chokes — so that L, Z, R, Q, and D can be measured at the operational bias point rather than at the small-signal limit. Current is programmable in 25 mA steps to a maximum of 25 A per unit; multiple units may be paralleled to extend the range up to 125 A DC.\u003c\/p\u003e\n\u003ch3 style=\"display:block; clear:both; text-align:left; font-size:18px; color:#1a1a1a; margin:22px 0 10px 0;\"\u003eWhat is the Wayne Kerr 3265BQ\/25A DC Bias Unit used for?\u003c\/h3\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eChoose the 3265BQ\/25A when the analyzer in the lab is a 3260B and the test requires the full 3 MHz measurement bandwidth at DC bias currents up to 25 A. This is the configuration used to characterize wound components for high-frequency power conversion (GaN\/SiC switching converters, RF chokes, planar magnetics) where parasitic behavior above 1 MHz matters.\u003c\/p\u003e\n\u003ch3 style=\"display:block; clear:both; text-align:left; font-size:18px; color:#1a1a1a; margin:22px 0 10px 0;\"\u003eHow does the 3265BQ\/25A connect to the analyzer?\u003c\/h3\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eThe 3265BQ\/25A connects to the host analyzer through four BNC-to-BNC links (supplied) for the AC measurement signal path, an I²C bus link for DC current control and status reporting, and a rear-panel bias safety interlock socket that provides door-lock and closed-control-line monitoring. Connection to the component under test is via 2-terminal M8 studs, or via 4-terminal Kelvin leads (Wayne Kerr fine-jaw 1EVA40100 or large-jaw 1EVA40180) for highest accuracy. The unit powers up automatically when the host analyzer is powered on.\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eFactually, the 3265BQ\/25A provides DC bias current in 25 mA increments from zero to 25 A. With basic ± 1% accuracy, an 11 V DC compliance voltage at 0.25 V AC drive level, and a universal 90–255 V AC, 47–63 Hz input, the unit is rated for full accuracy over 15 °C to 30 °C at maximum rated current. The I²C bus link continuously monitors excessive voltage drop and over-temperature status during measurement.\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eWayne Kerr is recognized in the precision-impedance measurement industry alongside Keysight (E4990A, E4980A) and Hioki (IM3536) as a primary brand for inductor and transformer characterization. The 3265B family extends the 3260B and 3255B-series analyzers into the high-current DC-bias regime that defines real-world power-magnetics behavior — saturation, DC-bias-dependent inductance, and Q degradation under load.\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eTypical use cases for the 3265BQ\/25A include:\u003c\/p\u003e\n\u003cul style=\"list-style:disc; text-align:left; clear:both; margin:0 0 16px 24px; padding:0;\"\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003eCharacterizing SMPS chokes and PFC inductors at their full operating DC bias current to verify the published L vs. I curve\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003eEV powertrain magnetics qualification — DC-link chokes, common-mode chokes, and traction inductors at realistic continuous bias\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003eHigh-current transformer qualification including bias-dependent leakage inductance and core loss\u003c\/li\u003e\n\u003cli style=\"text-align:left; margin:0 0 6px 0;\"\u003ePre-compliance inductance measurements where the supply designer needs to confirm L(I) holds across the converter's operating current range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"display:block; clear:both; text-align:left; font-size:22px; color:#1a1a1a; margin:28px 0 12px 0;\"\u003eAccessories Supplied\u003c\/h2\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eAll units are supplied with user manual, power cable, spare fuses, 4 × BNC to BNC links and daisy chain control link.\u003c\/p\u003e\n\u003ch3 style=\"display:block; clear:both; text-align:left; font-size:18px; color:#1a1a1a; margin:22px 0 10px 0;\"\u003eOptional Accessories (Order Codes)\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse; width:100%; clear:both; margin:0 0 18px 0; font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eAccessory Description\u003c\/th\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eOrder Code\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eKelvin clip leads (fine jaws)\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003e1EVA40100\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eKelvin clip leads (large jaws)\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003e1EVA40180\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003ePower transfer bus bars\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003e4-324-6009-PAIR\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eFilter pad (washable)\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003eHMDEC10\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e1009 DC bias fixture\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003e1J1009\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e1009 50A lead set\u003c\/td\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e\u003cstrong\u003e5-328-2005\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"display:block; clear:both; text-align:left; font-size:22px; color:#1a1a1a; margin:28px 0 12px 0;\"\u003eWayne Kerr 3265BQ\/25A — Core Specifications\u003c\/h2\u003e\n\u003cp style=\"text-align:left; margin:0 0 12px 0;\"\u003eThe 3265BQ\/25A must be used in conjunction with a compatible host analyzer. The specifications below are reproduced verbatim from the Wayne Kerr Technical Data Sheet covering the 3265BQ\/25A, 3265B\/25A, 3265B\/10A, 3265B\/5A DC Bias Units and the 1009 DC Bias Fixture.\u003c\/p\u003e\n\u003ctable style=\"border-collapse:collapse; width:100%; clear:both; margin:0 0 18px 0; font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eDC Bias Current — Rated\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e25 A maximum per unit, programmable in 25 mA steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eDC Bias Current — Paralleled\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eUp to 5 units in parallel for up to 125 A DC (25 mA steps). On the 3255BL: up to 50 A maximum.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eCompatible Host Analyzers\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e3260B Precision Magnetics Analyzer (extended 3 MHz operation), 3255BQ, 3255B Inductance Analyzers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eMeasurement Frequency Range (when paired)\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e20 Hz to 3 MHz (with 3260B Precision Magnetics Analyzer). Also operates with 3255BQ (20 Hz to 1 MHz) and 3255B (20 Hz to 500 kHz).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eCompliance Voltages\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eMaximum compliance voltage (\u0026lt;12 kHz) 11 V DC at 0.25 V AC drive level. 10 V compliance at 1 V AC drive level. For f\u0026gt;12 kHz deduct 0.5 V.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eVariables Measured\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eIn impedance mode: L, Z, R, Q, D. Not applicable to Rdc, or transformer measurements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eBasic Accuracy\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e± 1%. Varies with measurement speed, frequency and options chosen.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eMeasurement Terminals\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e2-terminal measurement via M8 studs. 4-terminal measurement via Kelvin leads and M8 studs. Measurement terminals internally protected by 1.6 A fuses against normal inductor back-EMF or accidental disconnection of inductor. Front panel fuses easily replaced.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eInterlock\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eBias safety interlock socket on rear panel of analyzer provides door lock and closed control lines.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eControl Connections\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eI²C bus link controls application of DC current and monitors status of analyzer. Status data includes excessive voltage drop and over temperature.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eOptional Facilities\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003e3265B bias units may be connected in parallel to give five times the rated current.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eTemperature Range\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eStorage: −40 °C to 70 °C. Operating: 0 °C to 40 °C, 20 A (3265BQ\/25A and 3265B\/25A). Full accuracy: 15 °C to 30 °C (at maximum rated current).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003ePower Supply\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eUniversal 90 to 255 V AC, 47 to 63 Hz. Input current 9 A rms max. Power factor \u0026gt;0.9. Unit powers up automatically when connected to a powered analyzer. Isolating switch provided.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eCooling\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eFan cooled. Intake front, exhaust rear. Fan filter accessible on front panel. Over-temperature trip provided.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eDimensions \u0026amp; Weight\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003eHeight 190 mm (7 1\/2\"), Width 440 mm (17 3\/8\"), Depth 520 mm (20 1\/2\"). Weight 15 kg (33 lb).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; vertical-align:top; border:1px solid #999; padding:8px 10px; background:#f0f0f0; font-weight:bold;\"\u003eApplications\u003c\/th\u003e\n\u003ctd style=\"text-align:left; vertical-align:top; border:1px solid #ccc; padding:8px 10px;\"\u003ePermits measurement analysis of wound components with levels of DC bias current higher than the standard 1 A.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003caside style=\"border:2px solid #c8102e; background:#fff8f8; padding:16px 20px; margin:20px 0; border-radius:4px; clear:both; text-align:left;\"\u003e\u003cp style=\"text-align:left; margin:0 0 8px 0;\"\u003e\u003cstrong\u003e⚠ Important — Host Analyzer Required\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0;\"\u003eThe 3265BQ\/25A is an ancillary instrument and does not function as a standalone meter. It must be operated with a compatible Wayne Kerr host analyzer as listed above. The 3255BL may \u003cstrong\u003eonly\u003c\/strong\u003e be used with the 3265B\/5A and 3265B\/10A. For extended 3 MHz operation with the 3260B, the 3265BQ\/25A variant is required.\u003c\/p\u003e\u003c\/aside\u003e\u003caside style=\"border:2px solid #c8102e; background:#fff8f8; padding:16px 20px; margin:20px 0; border-radius:4px; clear:both; text-align:left;\"\u003e\u003cp style=\"text-align:left; margin:0 0 8px 0;\"\u003e\u003cstrong\u003e⚠ Important — Kelvin Leads \u0026amp; High-Current Hardware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align:left; margin:0;\"\u003e4-terminal Kelvin measurement requires Kelvin clip leads — fine-jaw (\u003cstrong\u003e1EVA40100\u003c\/strong\u003e) or large-jaw (\u003cstrong\u003e1EVA40180\u003c\/strong\u003e). For paralleled-unit configurations, \u003cstrong\u003ePower transfer bus bars (4-324-6009-PAIR)\u003c\/strong\u003e are required to safely carry the high combined currents between units. Contact your Test Architect to confirm the correct lead and bus-bar configuration for your application.\u003c\/p\u003e\u003c\/aside\u003e\u003cp style=\"text-align:left; font-style:italic; color:#555; font-size:13px; margin-top:32px; border-top:1px solid #ddd; padding-top:12px;\"\u003eThis webpage was written by a human with an A.I. \"Intern\", which may contain errors. Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Wayne Kerr","offers":[{"title":"Default Title","offer_id":50790315000055,"sku":"waynek_3265bq-25a_new","price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/valuetronics.com\/products\/3265bq-25a-wayne-kerr-dc-bias-unit-new","provider":"ValueTronics","version":"1.0","type":"link"}