BJ77 Coaxial Connector - Equivalent & Substitute Parts

Part Overview

The BJ77 is a TRB twinaxial/triaxial connector jack manufactured by Cinch Connectivity Solutions Trompeter. It functions as a female socket (concentric) connector with solder cup termination, designed for panel mount applications with bayonet lock fastening. The part is active in production with 1469 units currently in stock. Substitute parts are identified when all critical electrical and mechanical parameters match the original specification, ensuring direct interchangeability without design modification.

Substiute Parts

BJ77

Cinch Connectivity Solutions TrompeterIn Stock: 1547BJ77 Datasheet

Current PartRFQ

BJ770

Cinch Connectivity Solutions TrompeterIn Stock: 1765BJ770 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The BJ770 is identified as a parametric equivalent to the BJ77 based on matching all critical electrical and mechanical parameters. Substitution eligibility is determined by the following criteria:

• Connector style, type, and termination method (TRB jack with solder cup)
• Mounting configuration and fastening mechanism (panel mount, bayonet lock)
• Electrical specifications (500 MHz maximum frequency, 400 V voltage rating, non-constant impedance)
• Material composition and plating (beryllium copper center contact, brass body with nickel finish and gold plating)
• Environmental operating range (-65°C ~ 165°C)
• Mechanical durability (500 mating cycles)
• Regulatory compliance (ROHS3, REACH Affected, EAR99)

Both parts share identical series designation (70) and packaging configuration (bulk, includes connector, nut, and washer).

Parameter Comparison

Engineering Selection Recommendations

Both BJ77 and BJ770 are active production parts with full ROHS3 compliance and REACH regulatory status. Selection between these parts should be based on inventory availability and procurement lead time. The BJ770 currently maintains higher stock levels (1663 units versus 1469 units), which may provide supply chain advantages for high-volume applications. Both parts carry identical electrical ratings, mechanical specifications, and environmental certifications, ensuring functional equivalence in all applications where the BJ77 is specified.

Frequently Asked Questions (FAQ)

Q: Can BJ770 be used as a direct replacement for BJ77? A: Yes. The BJ770 matches all electrical, mechanical, and material specifications of the BJ77. Both parts are identical in connector style, termination method, frequency rating, voltage rating, operating temperature range, and regulatory compliance status.

Q: Are there any differences in the connector interface or mating compatibility? A: No. Both parts feature identical TRB twinaxial/triaxial jack configurations with bayonet lock fastening, ensuring mechanical and electrical compatibility with the same mating plugs and cable assemblies.

Q: What is the difference between BJ77 and BJ770? A: The parts are parametrically equivalent. The BJ770 designation may reflect a manufacturing revision or internal product line update, but all functional and performance characteristics remain identical.

Q: Are both parts RoHS and REACH compliant? A: Yes. Both BJ77 and BJ770 are ROHS3 compliant and REACH affected, meeting current environmental and hazardous substance regulations.

Q: What is the maximum operating frequency for these connectors? A: Both parts are rated for operation up to 500 MHz with non-constant impedance characteristics.

Q: What is the voltage rating for these connectors? A: Both parts are rated for 400 V operation.

Q: How many mating cycles are these connectors rated for? A: Both parts are rated for 500 mating cycles, indicating the expected mechanical durability of the bayonet lock interface.

Q: What materials are used in the center contact and body? A: The center contact is beryllium copper with gold plating. The body is brass with nickel finish. Both parts use identical materials.

Q: Are these parts available in bulk packaging? A: Yes. Both BJ77 and BJ770 are supplied in bulk packaging, each including one connector, one nut, and one washer per unit.