ASJ-137-A-T/R Equivalent & Substitute Parts

Part Overview

The ASJ-137-A-T/R is a 4.60mm stereo phone jack connector manufactured by Adam Tech, designed for audio applications requiring a female jack with surface mount, right-angle termination. This connector features three conductors (TRS configuration) with two internal switches and gold-plated copper alloy contacts. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

ASJ-137-A-T/R

Adam TechIn Stock: 1109ASJ-137-A-T/R Datasheet

Current PartRFQ

35RASMT4BHNTRX

Switchcraft Inc.In Stock: 287335RASMT4BHNTRX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASJ-137-A-T/R is determined by strict alignment of the following parameters:

• Connector type: Female phone jack
• Mating diameter: 4.60mm (0.141", 1/8", Mini Plug)
• Signal configuration: Stereo (3 Conductor, TRS)
• Contact count: 3 Conductors, 5 Contacts
• Internal switch configuration: Two Switches
• Mounting orientation: Surface Mount, Right Angle
• Termination method: Solder
• Housing material: Thermoplastic
• Contact material: Copper Alloy

The 35RASMT4BHNTRX from Switchcraft Inc. meets all these core parameters, establishing it as a functionally equivalent substitute. Differences in voltage rating, current capacity, and contact plating do not preclude substitution when the application electrical requirements fall within the substitute's specifications.

Parameter Comparison

Engineering Selection Recommendations

The 35RASMT4BHNTRX is the qualified substitute for the ASJ-137-A-T/R based on the following factors:

Functional Compatibility: Both connectors share identical mechanical and electrical interface specifications for 4.60mm stereo audio jack applications. The TRS configuration, contact count, switch arrangement, and mounting geometry are fully aligned.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for equivalent component substitution.

Product Availability: The 35RASMT4BHNTRX is active in production with established inventory, whereas the ASJ-137-A-T/R is obsolete. This substitution addresses supply chain continuity.

Electrical Margin: The 35RASMT4BHNTRX provides higher voltage (250VAC vs. 30VDC) and current (3 A vs. 1 A) ratings, offering enhanced electrical capability for applications within the original design envelope.

Packaging Consideration: The 35RASMT4BHNTRX is supplied in Tape & Reel format, standard for surface mount production environments.

Frequently Asked Questions (FAQ)

Q: Can the 35RASMT4BHNTRX directly replace the ASJ-137-A-T/R on existing PCBs?

A: Yes. Both connectors share identical footprints, mounting orientation (surface mount, right angle), and solder termination. No PCB redesign is required.

Q: What is the significance of the different voltage ratings (30VDC vs. 250VAC)?

A: The ASJ-137-A-T/R is rated for 30VDC applications, while the 35RASMT4BHNTRX is rated for 250VAC. For audio jack applications operating at standard signal levels, the 35RASMT4BHNTRX's higher rating provides additional safety margin without affecting performance.

Q: Why do the contact platings differ (Gold vs. Silver)?

A: Both gold and silver platings provide reliable electrical contact for audio applications. Silver plating in the 35RASMT4BHNTRX is suitable for the same signal frequency range and environmental conditions as the gold-plated original.

Q: Is the higher current rating (3 A vs. 1 A) relevant for audio applications?

A: Audio jack connectors typically carry low-level signals well below 1 A. The 35RASMT4BHNTRX's 3 A rating provides additional design margin and is not a limiting factor for standard audio use.

Q: Are there any packaging differences to consider?

A: The 35RASMT4BHNTRX is supplied in Tape & Reel (TR) packaging, standard for automated surface mount assembly. The ASJ-137-A-T/R packaging format was not specified in available data. Tape & Reel format is compatible with standard pick-and-place equipment.

Q: Do both connectors have the same MSL rating?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.