Molex 0731000175 SMB Coaxial Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0731000175 is an SMB connector receptacle designed for 75-ohm coaxial applications. This right-angle, through-hole solder-mount component operates across a frequency range up to 4 GHz and maintains performance across an extended temperature range of -55°C to 155°C. The part is currently active in production with 698 units in stock. Alternative equivalent parts may be required due to inventory constraints, application-specific impedance requirements, or extended operating temperature needs.

Substiute Parts

0731000175

MolexIn Stock: 7990731000175 Datasheet

Current PartRFQ

0731000259

MolexIn Stock: 54770731000259 Datasheet

Parametric EquivalentRFQ

414026-2

TE Connectivity AMP ConnectorsIn Stock: 5678414026-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0731000175 is determined by the following critical parameters: connector style (SMB), connector type (receptacle with male pin), mounting configuration (through-hole, right-angle solder), frequency capability (4 GHz maximum), and physical compatibility with PCB layouts.

The substitute parts identified fall into two categories:

Parametric Equivalent (Full Compatibility): Molex 0731000259 maintains identical specifications across all critical parameters, including 75-ohm impedance, operating temperature range, and performance characteristics. This part represents a direct functional equivalent.

Impedance Variant (Conditional Compatibility): TE Connectivity 414026-2 shares the same connector style, mounting type, and frequency capability but operates at 50-ohm impedance instead of 75 ohms. This part is suitable only for applications designed for 50-ohm systems and is not interchangeable in 75-ohm circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Molex 0731000259 is the primary substitute for the Molex 0731000175. Both parts carry ROHS3 compliance and maintain identical electrical and mechanical specifications. Selection between these two Molex variants should be based on inventory availability and procurement lead times, as they are functionally interchangeable.

TE Connectivity 414026-2 is suitable only for applications requiring 50-ohm impedance matching. This part is not recommended as a substitute in 75-ohm system designs. The TE Connectivity part offers an extended operating temperature range (-65°C to 165°C) compared to the Molex options, which may be advantageous in extreme temperature environments. However, the higher insertion loss (0.6 dB versus 0.2 dB) must be evaluated against application signal integrity requirements. RoHS compliance status differs between manufacturers; TE Connectivity 414026-2 carries standard RoHS compliance while Molex parts carry ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 414026-2 be used in place of the Molex 0731000175?

A: Only if your application is designed for 50-ohm impedance. The Molex 0731000175 is specified for 75-ohm systems. Using a 50-ohm connector in a 75-ohm circuit will cause impedance mismatch and signal degradation. Additionally, the TE Connectivity part exhibits higher insertion loss (0.6 dB versus 0.2 dB).

Q: What is the difference between Molex 0731000175 and Molex 0731000259?

A: These parts are parametric equivalents with identical electrical and mechanical specifications. Both operate at 75 ohms, support 4 GHz frequency, and maintain the same temperature range and performance characteristics. The primary difference is inventory availability, with the 0731000259 having significantly higher stock levels.

Q: Are all three connectors physically compatible with the same PCB layout?

A: Yes. All three parts share identical mounting configurations: SMB connector style, receptacle type with male pin, through-hole right-angle solder termination. Physical PCB footprints are compatible across all three parts.

Q: Which part should I select if operating temperature is a critical factor?

A: The TE Connectivity 414026-2 supports an extended temperature range of -65°C to 165°C, compared to -55°C to 155°C for both Molex parts. However, this part is only suitable for 50-ohm applications. If your design requires 75-ohm impedance and extended temperature operation, the Molex options are limited to their specified range.

Q: What does the insertion loss difference mean for my application?

A: Insertion loss represents signal attenuation through the connector. The Molex parts (0.2 dB) exhibit lower loss than the TE Connectivity part (0.6 dB). For high-frequency or long-distance signal transmission, lower insertion loss is preferable to maintain signal integrity.