Pomona Electronics 3770-3 Binding Post Connector Equivalent & Substitute Parts

Part Overview

The Pomona Electronics 3770-3 is a standard knurled binding post connector with threaded and turret termination, designed for panel-mount applications in test and measurement equipment. This connector features gold-plated copper construction with polycarbonate insulation and supports 15 A current at 33Vrms/70VDC. The part is currently obsolete, making equivalent substitutes necessary for ongoing maintenance and repair applications. Functionally equivalent alternatives are available in the same product family with identical electrical and mechanical specifications but different color designations.

Substiute Parts

3770-3

Pomona ElectronicsIn Stock: 10633770-3 Datasheet

Current PartRFQ

3770-0

Pomona ElectronicsIn Stock: 12793770-0 Datasheet

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3770-2

Pomona ElectronicsIn Stock: 10083770-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3770-3 is determined by strict equivalence across the following critical parameters:

• Termination type: Threaded and Turret
• Termination thread specification: 8-32
• Current rating: 15 A
• Voltage rating: 33Vrms/70VDC
• Cross hole diameter: 0.096" (2.43mm)
• Head size: 0.440" OD (11.18mm)
• Panel thickness range: 0.070" ~ 0.250" (1.77mm ~ 6.35mm)
• Material - Body: Copper or Tellurium Copper
• Plating - Body: Gold
• Material - Insulation: Polycarbonate (PC)
• Nut Material: Brass with Nickel plating

The substitute parts 3770-0 and 3770-2 meet all critical electrical and mechanical parameters. The only variation is color designation (Black for 3770-0, Red for 3770-2, Orange for 3770-3) and body material composition (Tellurium Copper for 3770-0 versus standard Copper for 3770-2 and 3770-3). Both substitute parts are active products with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both 3770-0 and 3770-2 are functionally equivalent substitutes for the obsolete 3770-3. Selection between these alternatives should be based on the following criteria:

Product Status: The 3770-0 (Black) and 3770-2 (Red) are both active products with confirmed current inventory. The 3770-3 (Orange) is obsolete and should not be specified for new designs or long-term applications.

Compliance: All three parts maintain ROHS3 compliance and identical regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8536.90.4000).

Material Consideration: The 3770-0 uses Tellurium Copper for the body, while the 3770-2 uses standard Copper. Both materials support the identical electrical specifications and current rating. Tellurium Copper offers enhanced machinability and strength characteristics, making 3770-0 suitable for applications requiring superior mechanical durability.

Color Coding: Color selection should align with circuit identification standards or equipment design requirements. The 3770-0 (Black) and 3770-2 (Red) provide distinct visual identification options for different circuit functions or polarity conventions.

Frequently Asked Questions (FAQ)

Q: Can 3770-0 or 3770-2 be used as direct replacements for 3770-3?

A: Yes. Both 3770-0 and 3770-2 are direct functional equivalents. They share identical electrical ratings (15 A, 33Vrms/70VDC), mechanical dimensions (0.440" OD head, 0.096" cross hole), termination specifications (8-32 threaded and turret), and panel thickness compatibility (0.070" ~ 0.250"). The only differences are color designation and body material composition in the case of 3770-0.

Q: What is the difference between 3770-0 and 3770-2?

A: The primary difference is body material. The 3770-0 uses Tellurium Copper, while the 3770-2 uses standard Copper. Both materials are gold-plated and support identical electrical performance. The secondary difference is color: 3770-0 is Black and 3770-2 is Red. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The 3770-0 and 3770-2 are supplied in Bulk packaging. Packaging format should be confirmed with the supplier based on application requirements and procurement quantities.

Q: Do all three parts meet RoHS compliance?

A: Yes. The 3770-3, 3770-0, and 3770-2 are all ROHS3 compliant. They also share identical REACH and ECCN classifications.

Q: Which substitute should be selected for new equipment designs?

A: For new designs, either 3770-0 or 3770-2 is appropriate, as both are active products. Selection should be based on color coding requirements and material preference. The 3770-3 should not be specified for new applications due to its obsolete status.

Q: Are the mechanical dimensions identical across all three parts?

A: Yes. All three parts have identical cross hole diameter (0.096"), head size (0.440" OD), panel thickness range (0.070" ~ 0.250"), and termination thread specification (8-32).