CS-FF-MJB Equivalent & Substitute Parts

Part Overview

The CS-FF-MJB is a 2.92mm coaxial connector jack manufactured by Crystek Corporation, designed for RF applications requiring solder termination. This connector features a female socket configuration in a free-hanging (in-line) mounting style with threaded fastening. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

CS-FF-MJB

Crystek CorporationIn Stock: 1064CS-FF-MJB Datasheet

Current PartRFQ

SF1521-60042

Amphenol SV MicrowaveIn Stock: 980SF1521-60042 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SF1521-60042 manufactured by Amphenol SV Microwave qualifies as a functional substitute for the CS-FF-MJB based on the following alignment of critical parameters:

• Connector Style & Type: Both are 2.92mm female socket jacks
• Contact Termination: Both use solder termination
• Mounting Configuration: Both are free-hanging (in-line) with threaded fastening
• Mechanical Interface: Single-port configuration with identical contact materials (beryllium copper) and gold plating
• Environmental Compliance: Both are REACH Unaffected and classified under ECCN EAR99
• Moisture Sensitivity: Both rated MSL 1 (Unlimited)

The SF1521-60042 is an active product with documented RF performance specifications (34 GHz maximum frequency, 50 Ohm impedance, 500 mating cycles), providing enhanced reliability data compared to the obsolete CS-FF-MJB.

Parameter Comparison

Engineering Selection Recommendations

The SF1521-60042 is the appropriate substitute for the obsolete CS-FF-MJB. Selection is based on:

• Product Status: The SF1521-60042 is an active product with current manufacturing support, whereas the CS-FF-MJB is obsolete
• Regulatory Compliance: The SF1521-60042 carries ROHS3 Compliant certification, providing enhanced environmental compliance documentation
• Mechanical Compatibility: Identical 2.92mm female socket jack configuration with matching solder termination and threaded fastening ensures direct mechanical interface compatibility
• Material Specifications: Both connectors use beryllium copper center contacts with gold plating and stainless steel bodies, maintaining electrical performance characteristics
• Environmental Rating: Both parts are rated MSL 1 (Unlimited) and REACH Unaffected, supporting equivalent deployment in standard industrial and RF applications

The primary design difference is the dielectric material (PCTFE versus PEI) and shield termination method (clamp versus solder). These differences do not preclude substitution for applications where the original CS-FF-MJB was specified, provided the RF frequency and impedance requirements of the application are within the documented performance envelope of the SF1521-60042.

Frequently Asked Questions (FAQ)

Q: Can the SF1521-60042 be used as a direct replacement for the CS-FF-MJB in existing assemblies?

A: Yes. Both connectors share identical 2.92mm female socket jack geometry, solder termination, and threaded fastening. The mechanical interface is compatible. The SF1521-60042 is an active product with documented RF specifications (34 GHz maximum frequency, 50 Ohm impedance), providing enhanced performance data for system validation.

Q: What is the difference in shield termination between these parts?

A: The CS-FF-MJB uses clamp-style shield termination, while the SF1521-60042 uses solder termination. Both methods provide electromagnetic shielding. Solder termination in the SF1521-60042 may offer improved shielding consistency in high-frequency applications.

Q: Are there packaging differences between these connectors?

A: The CS-FF-MJB packaging is not specified in available documentation. The SF1521-60042 is supplied in bag packaging. This difference does not affect connector performance or mechanical compatibility.

Q: Does the dielectric material difference (PCTFE versus PEI) affect substitution suitability?

A: Both PCTFE and PEI are established dielectric materials for RF connectors. The material difference reflects design evolution between manufacturers. For applications operating within the SF1521-60042 specifications (34 GHz maximum), the PEI dielectric is suitable.

Q: What is the mating cycle rating for the SF1521-60042?

A: The SF1521-60042 is rated for 500 mating cycles. This specification is not provided for the CS-FF-MJB. The 500-cycle rating supports typical RF connector deployment scenarios.

Q: Are both parts compliant with current export and environmental regulations?

A: Yes. Both the CS-FF-MJB and SF1521-60042 are REACH Unaffected and classified under ECCN EAR99. The SF1521-60042 additionally carries ROHS3 Compliant certification, meeting current environmental standards.