4773-2 Pomona Accessory New

In summary, the Pomona Model 4773-2 is a red miniature insulated panel-mount pin jack from Pomona Electronics that accepts a .080-inch-diameter pin, fits panels up to .25 inch thick, and is rated for 1500 VDC operating voltage, 3 amperes of current, and a maximum operating temperature of +115°C (+239°F). The contact is a gold-plated beryllium copper spring (Berylco 25 per QQC-533) seated in a nickel-plated brass body (Alloy 360, ½ Hard), with a gold-plated phosphor bronze wrapped wire rear terminal for solderless panel wiring. Made in USA.

What is the Pomona 4773-2 used for?

The Pomona 4773-2 is used as a color-coded red panel-mount test point on instrument front panels, custom test fixtures, breakout boxes, calibration panels, and educational lab boards — anywhere a chassis needs a low-profile, insulated signal access point compatible with a .080-inch pin plug. The red variant is most commonly assigned to positive supply, signal source, or active rail per typical panel-marking convention. Engineers specify the 4773 family when the application requires (1) panel-mounted insulation rated to 1500 VDC, (2) a miniature footprint smaller than a standard 4 mm banana jack, and (3) a solderless wrapped-wire rear connection for production wiring.

How does the Pomona 4773 fit into the broader Pomona accessory standard?

Pomona Electronics is the universal standard for laboratory patch cords, BNC accessories, alligator and hook clips, banana plug leads, and probe accessories — the default hardware in every bench setup, every instrument rack, and every technician's kit. The 4773 series carries that same Pomona pedigree into the panel-mount jack category. Buying the authorized Pomona part means documented materials, traceable plating specifications, and a color set that matches the rest of the Pomona ecosystem of patch cords and pin plugs that will mate with it on the panel.

Compatible Accessories & Mating Products

The 4773 pin jack is a panel-side component — it lives on the front panel of an instrument or fixture and accepts a pin plug from the cable side. The accessory set below covers what is typically ordered alongside it to complete the connection:

• Pomona miniature pin plugs (.080 dia.): The mating pin plug family that inserts into the 4773 jack. Available in the matching standard Pomona color set so a panel-and-cable system can be color-coordinated end-to-end.
• Pomona miniature pin patch cords: Pre-assembled cables terminated with .080 pin plugs on each end, in the matching standard color set — used to bridge two panel-mounted 4773 jacks or to interconnect test fixtures.
• Pin-plug-to-banana-plug adapters and test leads: For connecting a 4773-equipped panel to standard DMM, power supply, or signal generator banana terminals.
• Pin-plug-to-alligator-clip or hook-clip test leads: For temporary connections from a 4773 panel jack to a circuit-board node or component lead during debug.
• Installation hardware: The 4773 ships with its own #8 internal-tooth steel lockwasher and #8-32 brass hex nut, both nickel-plated; additional spare hardware is available for production panel builds.
• Companion 4773 color variants: 4773-0 Black, 4773-2 Red, 4773-4 Yellow, 4773-5 Green, 4773-6 Blue, 4773-9 White — order the matching set when building a multi-channel color-coded panel.

Add the matching color set to your quote — a four- to six-color set is the typical configuration for any multi-channel test panel.

Pomona Electronics Model 4773 — Background

Color coding is not cosmetic on a test panel — it is functional. The Red (suffix -2) variant of the 4773 mates with the matching red pin plug, patch cord, or test lead to give the user instant visual confirmation that the correct signal path is engaged before power is applied. The 4773's polycarbonate insulation is molded directly to the pin jack body, and the supplied panel insulator is polycarbonate in the matching color of the pin jack insulation — a small detail that makes a multi-jack panel look professional and read correctly under fluorescent lab lighting. Paired with a wrapped wire terminal for solderless, vibration-resistant rear-side connection, the 4773 is the kind of part that gets specified once and reordered for the lifetime of the panel design.

Below are the complete features, materials, and ratings of the Pomona Model 4773-2, reproduced verbatim from the manufacturer datasheet for engineering, procurement, and quality-system reference.

Features

• Accepts .080 dia. pin
• Max. panel thickness .25.

Materials

Ratings

Ordering Information

The Pomona Model 4773 is ordered as Model 4773-*, where * is the color suffix. The full standard color set is:

• 4773-0 — Black
• 4773-2 — Red
• 4773-4 — Yellow
• 4773-5 — Green
• 4773-6 — Blue
• 4773-9 — White

This product page is for Pomona Model 4773-2 (Red). The other color variants are separately orderable part numbers.

Manufacturing & Tolerances

• Country of origin: Made in USA
• Dimensional tolerances (except where noted): .xx = ±.02" (,51 mm), .xxx = ± .005" (,127 mm)
• Specification basis: All specifications are to the latest revisions. Specifications are subject to change without notice.
• Trademarks: Registered trademarks are the property of their respective companies.

Factual Specifications & Industry Context

The 1500 VDC operating voltage rating places the 4773 well above the working voltage of typical bench instruments — most lab DMM and oscilloscope inputs are rated CAT III 1000 V or below. Its 3 A current rating is sufficient for low- to moderate-current test points but is not a substitute for a banana-jack-rated current path on a bench power supply quoting tens of amps. The pin jack accepts a .080-inch (2.03 mm) diameter pin — the standard Pomona miniature pin family — using a beryllium copper spring contact (Berylco 25, condition HT) gold-plated per MIL-G-45204, Type II, Class 00, over electroless nickel per MIL-C-26074, Class 1, a finish stack that is industry standard for low-millivolt, low-contact-resistance signal jacks. Maximum panel thickness is .25 inch, with hardware sized for a standard #8-32 thread.

Industry Standards and Authority

The 4773's plating callouts align the part with long-standing US military and federal specifications: MIL-G-45204 (gold electroplating), MIL-C-26074 (electroless nickel plating), QQN-290 (nickel plating), and QQC-533 (the controlling specification for the Berylco 25 beryllium copper spring material). The body alloy is Alloy 360, ½ Hard — free-machining brass, the workhorse alloy for nickel-plated connector bodies in US-manufactured test accessories. This combination of cited specifications is what differentiates an authorized Pomona part from generic look-alike pin jacks: it provides a documented material and finish chain of evidence for procurement, quality-system audit, and regulated production builds.

How does the Pomona 4773 compare to standard industry baselines?

• Vs. standard banana jacks: The 4773 is a miniature .080-inch pin jack, dramatically smaller than a standard 4 mm (.157-inch) banana jack — appropriate for dense multi-channel panels where banana jacks will not physically fit at the required pitch.
• Vs. solder-tail jacks: The wrapped wire terminal supports solderless wire-wrap connection, eliminating solder-joint reliability risk and the associated production-test rework cycle. Wire-wrap is still specified in high-reliability and aerospace assemblies for exactly this reason.
• Vs. plastic-body jacks: The 4773 uses a nickel-plated brass body with a gold-plated beryllium copper spring rather than a stamped or plated steel spring — a measurable advantage in low-millivolt signal integrity and long-term contact-resistance stability.
• Vs. unbranded or unauthorized parts: The 4773's MIL-G-45204 / MIL-C-26074 / QQN-290 / QQC-533 callouts are documented and traceable. Unbranded equivalents typically have no documented plating specification, which disqualifies them from regulated production builds.

Why ValueTronics for Pomona Accessories

ValueTronics is an authorized Pomona Electronics distributor. Pomona is one of two authorized ValueTronics test-accessory partners, alongside Cal Test Electronics — together they cover virtually every standard lab cable, probe, test lead, clip, and panel-connection accessory need. ValueTronics stocks the full Pomona standard color set and supports volume requirements for production test-fixture builds, panel rework programs, and educational lab equipping.