Molex 0734040740 SMB Coaxial Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0734040740 is an SMB connector plug with female socket configuration, designed for 50-ohm RF applications. This right-angle solder-terminated connector operates across a frequency range up to 4 GHz and supports cable groups RG-174, RG-188, and RG-316. The part is currently active in production with 1082 pieces in stock. Equivalent and substitute parts are identified to provide design flexibility, ensure supply chain continuity, and accommodate specific application requirements such as operating temperature ranges, material specifications, or compliance certifications.

Substiute Parts

0734040740

MolexIn Stock: 10920734040740 Datasheet

Current PartRFQ

903-289P-51A2

Amphenol RFIn Stock: 1474903-289P-51A2 Datasheet

DirectRFQ

903-367P-51A2

Amphenol RFIn Stock: 997903-367P-51A2 Datasheet

DirectRFQ

414002-1

TE Connectivity AMP ConnectorsIn Stock: 2101414002-1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0734040740 is determined by strict alignment with the following core parameters: SMB connector style, plug female socket type, 50-ohm impedance, right-angle free-hanging mounting, solder contact termination, crimp shield termination, 4 GHz maximum frequency, snap-on fastening, and single-port configuration. All identified substitutes maintain these electrical and mechanical specifications.

The substitute parts are grouped into two categories:

Direct Manufacturer Substitutes (Amphenol RF): Parts 903-289P-51A2 and 903-367P-51A2 are direct functional equivalents from Amphenol RF. Both maintain identical connector style, type, impedance, mounting configuration, and frequency specifications. Differences exist in housing color (gold versus silver), body finish material (gold versus nickel), and operating temperature range (-65°C ~ 165°C versus -55°C ~ 155°C).

Parametric Equivalent (TE Connectivity): Part 414002-1 from TE Connectivity AMP Connectors is a parametric equivalent that matches all core electrical and mechanical parameters. This part supports the same cable groups (RG-174, RG-188, RG-316) as the main part and maintains identical frequency and impedance specifications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and comply with RoHS regulations. The Molex 0734040740 and TE Connectivity 414002-1 both carry explicit 335 V voltage ratings, while Amphenol RF parts do not specify this parameter. The Molex part and TE Connectivity part both support the full cable group range (RG-174, RG-188, RG-316), whereas Amphenol RF substitutes support only RG-316.

The Molex 0734040740 exhibits lower insertion loss (0.2 dB) compared to all substitute options (0.6 dB). The Amphenol RF parts provide extended operating temperature range (-65°C ~ 165°C) relative to the Molex part (-55°C ~ 155°C). TE Connectivity 414002-1 matches the Molex part's voltage rating and cable group support while providing the extended temperature range.

Selection should be based on specific application requirements regarding insertion loss performance, operating temperature extremes, cable compatibility, and voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can Amphenol RF 903-289P-51A2 or 903-367P-51A2 be used as direct replacements for Molex 0734040740?

A: Both Amphenol RF parts maintain identical connector style, type, impedance, mounting configuration, frequency specification, and mating cycle rating. However, they support only RG-316 cable, whereas the Molex part supports RG-174, RG-188, and RG-316. Insertion loss is higher (0.6 dB versus 0.2 dB). Substitution is valid only when RG-316 cable compatibility and higher insertion loss are acceptable for the application.

Q: What are the key differences between Amphenol RF 903-289P-51A2 and 903-367P-51A2?

A: Both parts are electrically and mechanically identical. The primary differences are cosmetic: 903-289P-51A2 features gold housing and gold body finish, while 903-367P-51A2 features silver housing and nickel body finish. Both provide identical electrical performance and operating temperature range.

Q: Is TE Connectivity 414002-1 a suitable substitute?

A: TE Connectivity 414002-1 is a parametric equivalent that matches all core electrical and mechanical specifications, including 50-ohm impedance, 4 GHz frequency, solder termination, and snap-on fastening. It supports the same cable groups (RG-174, RG-188, RG-316) and carries the same 335 V voltage rating as the Molex part. Insertion loss is higher (0.6 dB versus 0.2 dB). This part is suitable for applications where cable group compatibility and voltage rating are critical requirements.

Q: Why does insertion loss differ between the main part and substitutes?

A: Insertion loss is determined by connector design, material composition, and internal geometry. The Molex 0734040740 specifies 0.2 dB insertion loss, while all substitute parts specify 0.6 dB. This difference reflects design variations between manufacturers and should be evaluated against application RF performance requirements.

Q: Are all parts RoHS compliant?

A: Yes. The Molex 0734040740 and all Amphenol RF substitutes are ROHS3 compliant. TE Connectivity 414002-1 is RoHS compliant. All parts meet applicable environmental regulations.

Q: What is the difference in operating temperature range?

A: The Molex 0734040740 operates from -55°C to 155°C. All substitute parts (Amphenol RF 903-289P-51A2, 903-367P-51A2, and TE Connectivity 414002-1) operate from -65°C to 165°C, providing extended temperature capability at both extremes.