Pomona Electronics 3770-1 Binding Post Connector - Equivalent & Substitute Parts

Part Overview

The Pomona Electronics 3770-1 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 a 15 A current rating and 33Vrms/70VDC voltage rating. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing procurement and system maintenance. Active alternatives within the same product family maintain identical electrical and mechanical specifications while offering current availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	3770-1
Manufacturer	Pomona Electronics
Category	Banana and Tip Connectors
Description	CONN BIND POST KNURLED BROWN
Type	Standard
Head Style	Knurled
Termination	Threaded and Turret
Termination Thread	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
Plating - Body	Gold
Material - Insulation	Polycarbonate (PC)
Nut Material	Brass
Nut Plating	Nickel
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 3770-1 binding post connector 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 accommodation: 0.070" ~ 0.250" (1.77mm ~ 6.35mm)
Insulation material: Polycarbonate (PC)
Nut material and plating: Brass with Nickel plating
Compliance: ROHS3 Compliant

The substitute parts 3770-0 and 3770-2 maintain identical electrical and mechanical specifications. Variations are limited to connector color (brown, black, or red) and body material composition (copper or tellurium copper), which do not affect functional interchangeability in standard applications. Both substitute parts are active products with current manufacturing status.

Parameter Comparison

Parameter	3770-1 (Brown)	3770-0 (Black)	3770-2 (Red)
Manufacturer	Pomona Electronics	Pomona Electronics	Pomona Electronics
Category	Banana and Tip Connectors	Banana and Tip Connectors	Banana and Tip Connectors
Type	Standard	Standard	Standard
Head Style	Knurled	Knurled	Knurled
Termination	Threaded and Turret	Threaded and Turret	Threaded and Turret
Termination Thread	8-32	8-32	8-32
Current Rating (Amps)	15	15	15
Voltage Rating	33Vrms/70VDC	33Vrms/70VDC	33Vrms/70VDC
Cross Hole Diameter	0.096" (2.43mm)	0.096" (2.43mm)	0.096" (2.43mm)
Head Size	0.440" OD (11.18mm)	0.440" OD (11.18mm)	0.440" OD (11.18mm)
Panel Thickness Range	0.070" ~ 0.250" (1.77mm ~ 6.35mm)	0.070" ~ 0.250" (1.77mm ~ 6.35mm)	0.070" ~ 0.250" (1.77mm ~ 6.35mm)
Material - Insulation	Polycarbonate (PC)	Polycarbonate (PC)	Polycarbonate (PC)
Nut Material	Brass	Brass	Brass
Nut Plating	Nickel	Nickel	Nickel
Plating - Body	Gold	Gold	Gold
Color	Brown	Black	Red
Material - Body	Copper	Tellurium Copper	Copper
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

The 3770-1 binding post connector is obsolete and should be replaced with either the 3770-0 or 3770-2 for new procurement and system maintenance. Both substitute parts are active products with identical electrical and mechanical specifications, ensuring direct functional compatibility.

Selection between 3770-0 (black) and 3770-2 (red) should be based on circuit identification requirements or system color-coding standards. The 3770-0 uses tellurium copper body material, while the 3770-1 and 3770-2 use standard copper. Both materials are functionally equivalent for the specified electrical parameters.

All three parts maintain ROHS3 compliance and are suitable for applications requiring 15 A current capacity and 33Vrms/70VDC voltage rating with 8-32 threaded termination.

Frequently Asked Questions (FAQ)

Q: Can the 3770-0 or 3770-2 be used as direct replacements for the obsolete 3770-1?

A: Yes. The 3770-0 and 3770-2 are functionally equivalent to the 3770-1 across all critical electrical and mechanical parameters, including current rating, voltage rating, termination thread specification, and panel mounting dimensions. The only differences are connector color and body material composition, which do not affect electrical performance.

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

A: The primary differences are color (black for 3770-0, red for 3770-2) and body material (tellurium copper for 3770-0, standard copper for 3770-2). Both maintain identical electrical ratings, termination specifications, and mechanical dimensions. Selection should be based on circuit identification or color-coding requirements.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 3770-1, 3770-0, and 3770-2 are all ROHS3 compliant and suitable for applications with environmental compliance requirements.

Q: What panel thickness range is supported by these binding post connectors?

A: All three parts accommodate panel thicknesses from 0.070" to 0.250" (1.77mm to 6.35mm), supporting standard panel mounting applications.

Q: What is the current and voltage rating for these connectors?

A: All three parts are rated for 15 A current and 33Vrms/70VDC voltage, making them suitable for low-voltage test and measurement applications.

Q: What termination options are available?

A: All three parts feature threaded and turret termination with 8-32 thread specification, allowing flexible connection methods for wire and component leads.

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