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

Part Overview

The ASJ-137-B-T/R is a 4.60mm stereo phone jack connector manufactured by Adam Tech, designed for audio applications requiring a female surface mount, right angle configuration with solder termination. This connector features a single internal switch, unshielded design, and board guide for mechanical stability. The product is currently obsolete, making identification of compatible substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

ASJ-137-B-T/R

Adam TechIn Stock: 954ASJ-137-B-T/R Datasheet

Current PartRFQ

SJ-3524-SMT-TR

CUI DevicesIn Stock: 35236SJ-3524-SMT-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Connector type: Female phone jack
• Mating diameter: 4.60mm (0.141", 1/8", Mini Plug) headphone standard
• Signal configuration: Stereo (3 Conductor, TRS)
• Contact count: 3 Conductors, 4 Contacts
• Mounting configuration: Surface mount, right angle orientation
• Termination: Solder connection
• Internal switching: Single switch mechanism
• Shielding: Unshielded design
• Current capacity: 1 A minimum
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The SJ-3524-SMT-TR from CUI Devices meets all mandatory substitution criteria. Both connectors share identical mechanical and electrical specifications for mating interface, contact configuration, mounting style, and termination method. Differences in contact plating material (gold vs. silver), housing polymer composition, and voltage rating do not preclude functional equivalence in audio jack applications where the 1 A current rating and solder termination are primary design constraints.

Parameter Comparison

Engineering Selection Recommendations

The SJ-3524-SMT-TR is the qualified substitute for the obsolete ASJ-137-B-T/R. Selection is supported by:

• Identical mechanical interface: Both connectors mate with standard 4.60mm stereo plugs and maintain identical contact geometry and positioning.
• Matching electrical configuration: Both provide 3-conductor stereo (TRS) signal routing with single-switch internal mechanism and 1 A current capacity.
• Regulatory alignment: Both connectors hold ROHS3 Compliant and REACH Unaffected certifications, ensuring compliance with current environmental and hazardous substance restrictions.
• Active product status: The SJ-3524-SMT-TR is currently in active production with confirmed inventory availability (35,200 units), eliminating supply chain risk associated with the obsolete ASJ-137-B-T/R.
• Packaging availability: The SJ-3524-SMT-TR is supplied in Cut Tape (CT) and Digi-Reel® formats, supporting both prototype and production volume requirements.

The 12VDC rated voltage of the SJ-3524-SMT-TR is adequate for audio jack applications, which typically operate at signal levels well below this specification. The silver contact plating provides equivalent corrosion resistance and conductivity to the gold-plated original in audio frequency applications.

Frequently Asked Questions (FAQ)

Q: Can the SJ-3524-SMT-TR directly replace the ASJ-137-B-T/R without PCB layout modifications?

A: Yes. Both connectors share identical 4.60mm mating diameter, surface mount right angle configuration, and solder pad footprint geometry. No PCB redesign is required for mechanical or electrical compatibility.

Q: What is the significance of the different contact plating materials (gold vs. silver)?

A: Both gold and silver platings provide adequate conductivity and corrosion resistance for audio jack applications. The choice between them does not affect functional performance in standard headphone or audio line-level circuits. Silver plating is widely used in active production audio connectors.

Q: Does the lower voltage rating (12VDC vs. 30VDC) on the SJ-3524-SMT-TR affect compatibility?

A: No. Audio jack applications operate at signal levels significantly below 12VDC. The voltage rating represents the maximum safe operating specification; audio signals do not approach this limit. The 1 A current rating, which is identical on both connectors, is the controlling electrical parameter for audio applications.

Q: Are there any temperature operating range considerations?

A: The SJ-3524-SMT-TR specifies -25°C to 85°C operating temperature. This range covers standard consumer and industrial audio equipment environments. If the original ASJ-137-B-T/R was specified for operation outside this range, thermal performance should be verified for the specific application.

Q: What packaging options are available for the SJ-3524-SMT-TR?

A: The SJ-3524-SMT-TR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats. Cut Tape is suitable for prototype and small-volume assembly; Digi-Reel® supports high-volume production runs with automated pick-and-place equipment.

Q: Are both connectors RoHS and REACH compliant?

A: Yes. Both the ASJ-137-B-T/R and SJ-3524-SMT-TR are ROHS3 Compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations for electronic components.