Amphenol RF 903-652P-71P SMB Coaxial Connector Equivalent & Substitute Parts

Part Overview

The Amphenol RF 903-652P-71P is an SMB connector jack with male pin configuration, designed for 75 ohm RF applications. This through-hole solder-mount coaxial connector operates across frequencies up to 4 GHz and is rated for -65°C to 165°C operating temperatures. The connector features a snap-on fastening mechanism and is constructed with beryllium copper center contacts and nickel-plated brass body with gold plating on the center contact.

The product maintains active status with ROHS3 compliance and REACH affected designation. Substitute parts are identified to address inventory availability, lead time requirements, or specific application constraints while maintaining core electrical and mechanical compatibility within the SMB connector category.

Substiute Parts

903-652P-71P

Amphenol RFIn Stock: 941903-652P-71P Datasheet

Current PartRFQ

131-3701-266

Cinch Connectivity SolutionsIn Stock: 8274131-3701-266 Datasheet

Parametric EquivalentRFQ

131-3701-276

Cinch Connectivity SolutionsIn Stock: 4479131-3701-276 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 903-652P-71P are identified from the Cinch Connectivity Solutions product line based on alignment of core mechanical and electrical parameters. The substitute parts maintain compatibility across the following critical parameters:

Matched Parameters:

• Connector style (SMB)
• Connector type (Jack, Male Pin)
• Mounting type (Through Hole)
• Contact termination (Solder)
• Shield termination (Solder)
• Fastening type (Snap-On)
• Frequency maximum (4 GHz)
• Operating temperature range (-65°C to 165°C)
• Mating cycles (500)
• Body material (Brass)
• Body finish (Nickel)
• Center contact plating (Gold)
• Dielectric material (PTFE)
• RoHS status (ROHS3 Compliant)
• Moisture sensitivity level (1 - Unlimited)

Parameter Variance: The substitute parts operate at 50 ohm impedance, compared to the main part's 75 ohm specification. This impedance difference represents a distinct electrical characteristic that must be evaluated against specific application requirements. Both substitute parts are manufactured by Cinch Connectivity Solutions and maintain identical mechanical form factors and environmental ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The Amphenol RF 903-652P-71P remains the specified component for applications requiring 75 ohm impedance matching. This part maintains active product status with full ROHS3 compliance and REACH affected designation. Current inventory of 880 pieces supports immediate procurement requirements.

Substitute Part Selection Criteria:

The Cinch Connectivity Solutions parts 131-3701-266 and 131-3701-276 are functionally equivalent SMB jack connectors with identical mechanical mounting, environmental ratings, and frequency performance. Both substitute parts maintain active product status with ROHS3 compliance and REACH affected designation.

Key Distinction: Substitute parts operate at 50 ohm impedance. Selection of 50 ohm variants requires confirmation that the application circuit design accommodates this impedance specification. Both Cinch parts are available in higher inventory quantities (8186 and 4391 pieces respectively), supporting extended lead time mitigation strategies.

Compliance Alignment: All three parts share identical regulatory classifications (ROHS3 Compliant, REACH Affected, EAR99 ECCN designation), ensuring equivalent compliance posture across procurement and deployment scenarios.

Frequently Asked Questions (FAQ)

Q: Can the Cinch 131-3701-266 or 131-3701-276 directly replace the Amphenol RF 903-652P-71P?

A: Both Cinch parts provide mechanical and environmental compatibility as SMB jack connectors with identical through-hole solder mounting, snap-on fastening, and operating temperature ranges. The primary difference is impedance specification: the Amphenol part operates at 75 ohms while the Cinch parts operate at 50 ohms. Direct substitution is valid only when the application circuit design accommodates 50 ohm impedance.

Q: What is the impedance difference between the main part and substitute parts?

A: The Amphenol RF 903-652P-71P is specified for 75 ohm impedance, while both Cinch substitute parts (131-3701-266 and 131-3701-276) are specified for 50 ohm impedance. This difference affects RF signal transmission characteristics and must align with the system's characteristic impedance design.

Q: Are there differences between the two Cinch substitute parts?

A: The Cinch parts 131-3701-266 and 131-3701-276 are electrically and mechanically identical. Both are SMB jack connectors with 50 ohm impedance, identical frequency response, operating temperature range, and environmental ratings. The primary difference is inventory availability: 131-3701-266 has 8186 pieces in stock while 131-3701-276 has 4391 pieces in stock.

Q: Do all three parts meet the same compliance standards?

A: Yes. The Amphenol RF 903-652P-71P and both Cinch substitute parts (131-3701-266 and 131-3701-276) are ROHS3 compliant, REACH affected, and classified under ECCN EAR99. All three parts maintain moisture sensitivity level 1 (unlimited).

Q: What is the frequency performance across all three parts?

A: All three parts support maximum frequency operation to 4 GHz, providing equivalent RF performance within this bandwidth specification.

Q: Are the operating temperature ranges identical?

A: Yes. The Amphenol RF 903-652P-71P and both Cinch substitute parts operate across the identical temperature range of -65°C to 165°C.

Q: What is the mating cycle rating for all parts?

A: All three parts are rated for 500 mating cycles, providing equivalent mechanical durability specifications.

Q: How do the center contact materials differ?

A: The Amphenol RF 903-652P-71P features beryllium copper center contacts, while both Cinch substitute parts use brass center contacts. Both materials are plated with gold for corrosion resistance and electrical performance.

Q: Is insertion loss specified for the substitute parts?

A: The Amphenol RF 903-652P-71P specifies 0.3 dB insertion loss. Insertion loss is not specified in the technical data for the Cinch substitute parts (131-3701-266 and 131-3701-276).

Q: What packaging is available for these parts?

A: The Amphenol RF 903-652P-71P is available in standard packaging. Both Cinch substitute parts are available in bulk packaging.