VMB134 SMB Coaxial Connector Equivalent & Substitute Parts

Part Overview

The VMB134 is an SMB connector plug manufactured by Cinch Connectivity Solutions, designed for 50-ohm RF applications requiring through-hole PCB mounting with solder termination. This connector operates across frequencies up to 4 GHz and maintains performance across the industrial temperature range of -65°C to 165°C. The part is currently active in production with 716 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

VMB134

Cinch Connectivity SolutionsIn Stock: 776VMB134 Datasheet

Current PartRFQ

131-3801-201

Cinch Connectivity Solutions JohnsonIn Stock: 9402131-3801-201 Datasheet

Parametric EquivalentRFQ

131-3801-231

Cinch Connectivity SolutionsIn Stock: 989131-3801-231 Datasheet

Parametric EquivalentRFQ

903-410P-53P

Amphenol RFIn Stock: 1366903-410P-53P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VMB134 are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution criteria are:

• Connector style, type, and configuration (SMB plug, female socket)
• Impedance matching (50 ohms)
• Frequency capability (4 GHz maximum)
• Mounting method (through-hole PCB)
• Termination type (solder contact and shield)
• Fastening mechanism (snap-on)
• Operating temperature range (-65°C to 165°C)
• Mating cycle rating (500 cycles)
• Dielectric material (PTFE)
• Body material and finish (brass with gold plating)

All three substitute parts meet these core parameters. Variations in center contact material (beryllium copper versus brass) and additional certifications do not affect functional interchangeability within the specified electrical and mechanical envelope.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the VMB134 and are qualified for direct substitution in 50-ohm SMB connector applications. Selection among these parts should be based on the following factors:

Cinch 131-3801-201: This part offers the highest inventory availability (9377 units) and carries RoHS3 compliance with REACH affected status. MSL rating of 1 (unlimited) indicates no moisture sensitivity constraints. This part is suitable for applications requiring maximum supply assurance and RoHS3 certification.

Cinch 131-3801-231: This part maintains RoHS compliance with MSL 1 (unlimited) rating and 930 units in stock. It provides a mid-range inventory option within the Cinch product family with equivalent electrical performance.

Amphenol RF 903-410P-53P: This part is manufactured by Amphenol RF and provides 1330 units in inventory. It carries RoHS3 compliance and REACH affected status. The specified insertion loss of 0.3 dB is documented for this part. This option supports multi-source procurement strategies.

All parts maintain identical electrical performance across the specified frequency range, temperature operating window, and mechanical interface requirements. Selection may also consider supplier relationship, lead time, and cost factors within your procurement framework.

Frequently Asked Questions (FAQ)

Q: Can the 131-3801-201 be used as a direct replacement for the VMB134?

A: Yes. Both parts meet identical specifications for SMB connector style, 50-ohm impedance, 4 GHz frequency capability, through-hole mounting, solder termination, and operating temperature range. The center contact material difference (beryllium copper versus brass) does not affect electrical or mechanical interchangeability within the specified performance envelope.

Q: What is the difference between the two Cinch substitute parts (131-3801-201 and 131-3801-231)?

A: Both parts are electrically and mechanically equivalent. The primary differences are inventory levels (9377 units for 131-3801-201 versus 930 units for 131-3801-231) and RoHS certification status (RoHS3 for 131-3801-201 versus RoHS for 131-3801-231). Both carry MSL 1 (unlimited) rating.

Q: Is the Amphenol RF 903-410P-53P compatible with PCB designs specified for the VMB134?

A: Yes. The Amphenol part maintains identical SMB connector geometry, through-hole mounting footprint, solder termination method, and snap-on fastening mechanism. It is fully compatible with existing PCB designs and assembly processes.

Q: Does the insertion loss specification of 0.3 dB for the Amphenol part affect substitution suitability?

A: The insertion loss specification is provided for the Amphenol part but not documented for the VMB134 or other Cinch parts in the available data. All parts operate within the same 50-ohm impedance and 4 GHz frequency specification. Insertion loss performance should be evaluated within your specific application requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 131-3801-201 and 903-410P-53P carry RoHS3 compliance. The 131-3801-231 carries RoHS compliance. All parts meet regulatory requirements for restricted substance compliance.

Q: What is the moisture sensitivity level (MSL) for these connectors?

A: All substitute parts carry MSL 1 (unlimited), indicating no moisture sensitivity constraints during storage or handling. The VMB134 is listed as not applicable for MSL, but the substitute parts' MSL 1 rating ensures compatibility with standard storage and assembly environments.