# GW Instek AEL-5008-350-75 350V/75A 7500W Programmable AC/DC Electronic Load # GW Instek AEL-5008-350-75 350V/75A 7500W Programmable AC/DC Electronic Load ## Key Features At A Glance - Wide power range from 1875 W to 22500 W across the AEL-5000 family for sizing to inverter, UPS, and battery test applications - Voltage ranges available at 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc to match diverse AC source and battery bus levels - Multiple operating modes: Constant Current (sine-wave and linear for square/quasi-square/PWM), Constant Resistance, Constant Voltage, and Constant Power - UPS test capability including Transfer Time measurement, Battery Discharge function, and UPS Back-Up function with programmable UVP threshold - Fuse Test, Short Test, OPP/OCP Test, programmable Inrush current simulation (Istart-Istop/Tsep), and programmable Surge current simulation (S1/T1-S2/T2-S3/T3) - Turbo mode supports up to 2X current and power rating for Fuse, Short, OCP, and OPP test functions on supported models - Master/Slave configuration: one master with up to seven slave units for three-phase or parallel applications - Optional GPIB, RS-232, LAN, and USB interfaces with external programming input (F.S / 10 Vdc, resolution 0.1 V) and external SYNC (TTL) for ATE integration The Instek AEL-5000 Series is a family of programmable AC/DC electronic loads designed for testing inverters, uninterruptible power supplies (UPS), batteries, and AC/DC power conversion equipment. The series spans models from 1875 W up to 22500 W, with voltage ratings of 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc to align with common AC mains levels and battery bus voltages. Each unit operates across a DC and 40 to 440 Hz frequency range in CC and CP modes (DC to 440 Hz in LIN, CR, and CV modes), with the 480 V family covering DC and 40 to 70 Hz. According to the datasheet, the AEL-5000 Series is applied to UPS Transfer Time measurement, UPS Back-Up function testing, Battery Discharge function testing, and measurement of efficiency for PV (resistive plus non-linear mode). The series also supports Fuse Test, Short/OPP/OCP Test, programmable Inrush current simulation, and programmable Surge current simulation, making it suitable for power-on loading during inverter and UPS start-up sequences as well as half-cycle and SCR/TRIAC loading scenarios. ## Brand Heritage Instek (also branded as GW Instek) is a Taiwanese test and measurement manufacturer founded in 1975 and headquartered in New Taipei City. The company has operated continuously under the Instek name and remains an independent manufacturer of bench instruments, power supplies, electronic loads, and signal sources. ## Compare Other Models in This Series The AEL-5000 Series is organized into model variants distinguished by power rating, current rating, and voltage class. Power ratings span 1875 W, 2800 W, 3750 W, 5600 W, 7500 W, 11250 W, 15000 W, 18750 W, and 22500 W. Current ratings include 18.75 Arms, 28 Arms, 37.5 Arms, 56 Arms, 75 Arms, and 112.5 Arms. Voltage classes are 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc. The model number encodes the configuration: for example, AEL-5004-350-37.5 indicates a 3750 W model at 350 Vrms with 37.5 Arms current rating, while AEL-5023-425-112.5 indicates a 22500 W model at 425 Vrms with 112.5 Arms. The 480 V family is presently represented by the AEL-5003-480-18.75 (2800 W) and AEL-5004-480-28 (3750 W) variants, which operate over a narrower DC and 40 to 70 Hz frequency range. Each new AEL-5000 Series model below is its own dedicated product page with condition-matched pricing. Click any model below to view the specific page for that variant. Within the 350 V and 425 V families, models scale primarily by power and current rating: from the entry 1875 W / 18.75 Arms units (AEL-5002 designation) up to the 22500 W / 112.5 Arms units (AEL-5023 designation). The higher-power models occupy larger chassis form factors, with the 5600 W and 7500 W units in a 458 x 480 x 590 mm chassis, the 11250 W unit in an 814 x 480 x 590 mm chassis, and the 15000 W through 22500 W units in 1283 x 600 x 600 mm cabinets. The 480 V family operates across DC and 40 to 70 Hz, while the 350 V and 425 V families operate across DC and 40 to 440 Hz in CC and CP modes. All families share the same core operating modes (CC, Linear CC, CR, CV, CP), UPS test functions, Fuse Test, Short/OPP/OCP Test, and programmable Inrush and Surge current simulation features. See the comparison table that follows for specific differences in voltage, current, power, resistive range, and chassis dimensions across the AEL-5000 family. Model Max Voltage Max Current (RMS) Max Power **AEL-5008-350-75** 50~350 Vrms / 500 Vdc 75 Arms / 225 Apeak 7500 W AEL-5002-350-18.75 50~350 Vrms / 500 Vdc 18.75 Arms / 56.25 Apeak 1875 W AEL-5003-350-28 50~350 Vrms / 500 Vdc 28 Arms / 84 Apeak 2800 W AEL-5004-350-37.5 50~350 Vrms / 500 Vdc 37.5 Arms / 112.5 Apeak 3750 W Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Product Core & Specifications Category Specification Value Operation Mode Constant Current Mode for Sine-Wave Accuracy ±(0.1% of setting + 0.2% of range) @ 50/60Hz Operation Mode Linear Constant Current Mode (Sine, Square, Quasi-Square, PWM) Accuracy ±(0.1% of setting + 0.2% of range) @ 50/60Hz Operation Mode Constant Resistance Mode Accuracy ±0.2% of (setting + range) @ 50/60Hz Operation Mode Constant Voltage Mode Accuracy ±0.1% of setting + 0.1% of range Operation Mode Constant Power Mode Accuracy ±0.1% of setting + 0.1% of range Crest Factor (CC & CP Mode) Range / Resolution / Accuracy √2 to 5 / 0.1 / (0.5% / Irms) + 1% F.S. Power Factor (CC & CP Mode) Range / Resolution / Accuracy 0 to 1 Lag or Lead / 0.01 / 1% F.S. Test Mode UPS Efficient Measurement Non-Linear Mode, Auto 40~440Hz Test Mode Measuring Efficiency for PV Resistive + Non-Linear Mode, Auto 40~440Hz UPS Back-Up / Battery Discharge Back-Up / Discharge Time 1 to 99999 Sec. (>27H) UPS Transfer Time UVP (VTH) / Time Range 2.5V / 0.15mS to 999.99mS Short / OPP / OCP Test Short Time 0.1S to 10Sec. or Continuous (Turbo OFF); 0.1S to 15Sec. (Turbo ON) Short / OPP / OCP Test OPP/OCP Step Time 100ms (Turbo OFF); 100ms, up to 10 Steps (Turbo ON) Fuse Test Mode Trip & Non-Trip Time 0.1 to 9999.9 sec (Turbo OFF); 0.1 to 1.0 sec (Turbo ON) Fuse Test Mode Measurement Accuracy ±0.003 Sec. Fuse Test Mode Repeat Cycle 0 to 255 Programmable Surge Current T1 and T2 Time 0.01S to 0.5Sec. (Turbo OFF); 0.015 to 0.55sec (Turbo ON) Programmable Surge Current T3 Time 0.01S to 9.99Sec. or Continuous Programmable Inrush Current Inrush Step Time 0.1mS to 100mS Measurements Voltage Readback Accuracy ±0.05% of (reading + range) Measurements Voltage Readback Parameter Vrms, V Max/Min, +/-Vpk Measurements Current Readback Accuracy ±0.05% of (reading + range) @ 50/60Hz Measurements Current Readback Parameter Irms, I Max/Min, +/-Ipk Measurements Watt Readback Accuracy ±0.05% of (reading + range) @ 50/60Hz \[low-voltage models\]; ±0.2% / ±0.4% \[high-power models\] Power Factor Meter Range / Accuracy +/- 0.000 to 1.000 / ±(0.002 ± (0.001/PF)\*F) Frequency Meter Range / Accuracy DC, 40 to 440Hz (480V models: DC, 40 to 70Hz) / 0.1% VA Meter Calculation Vrms × Arms corresponding to Vrms and Arms Other Parameter Meter Parameters VA, VAR, CF\_I, Ipeak, Imax, Imin, Vmax, Vmin, IHD, VHD, ITHD, VTHD Others Start-Up Loading Yes - Power-on loading during Inverter / UPS start up Others Load ON / OFF Angle 0 to 359 degrees programmable for load ON/OFF angle Others Half Cycle and SCR/TRIAC Loading Positive or Negative half cycle, 90° Trailing or Leading edge current waveform programmable Others Master/Slave (3-phase or Parallel) Yes, 1 master and up to 7 slave units Others External Programming Input (Option) F.S / 10Vdc, Resolution 0.1V Others External SYNC Input TTL Others Vmonitor (Isolated) ±500V/±10V (350V models); ±600V/±10V (425V models); ±700V/±10V (480V models) Others Interface (Option) GPIB; RS-232; LAN; USB Others Operation Temperature 0 to 40°C **Important:** Maximum input voltage rating is model-dependent: 500 Vdc / 350 Vrms, 600 Vdc / 425 Vrms, or 700 Vdc / 480 Vrms. Confirm the model's voltage rating matches the DUT's bus voltage with adequate margin before connection.**Important:** ms (millisiemens) is the unit of conductance (G); one siemens equals 1/Ω.**Important:** Operating temperature range is 0~40°C; all specifications apply for 25°C ±5°C, except as noted.**Important:** Turbo mode provides up to 2X Current Rating and Power Rating; supports Fuse, Short/OCP/OPP test functions.**Important:** All specifications apply for 50/60Hz.**Important:** All specifications are subject to change without notice.**Important:** Communication interfaces (GPIB, RS-232, LAN, USB) and External Programming Input are optional and must be ordered separately. **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.** ## Details - **Price:** 0.0 USD - **Vendor:** GW Instek - **Type:** Dc Electronic Load - **Tags:** 350V Class, AC DC Electronic Load, AC Electronic Load, AEL-5000 Series, Battery Test, DC Electronic Load, Good Will Instrument, GW Instek, Instek, Inverter Test, Manufacturers, Power Supplies & Loads, product_manual_group_3, Product_new, Programmable Load, PV Inverter Test, UPS Test ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 0.00 USD | In stock | ## Images - GW Instek AEL-5008-350-75 350V/75A 7500W Programmable AC/DC Electronic Load --- > Source: [ValueTronics](https://valuetronics.com/products/ael-5008-350-75-instek-ac-dc-electronic-load-new) > Updated: 2026-05-30