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

Part Overview

The ASJ-137-M-T/R is a 4.60mm stereo phone jack connector manufactured by Adam Tech, designed for audio applications requiring a 4-conductor TRRS (Tip-Ring-Ring-Sleeve) configuration. This surface-mount, right-angle connector features solder termination and is rated for 30VDC at 1A. The product is currently obsolete, making identification of compatible substitute components essential for ongoing design support, legacy system maintenance, and component procurement.

Substiute Parts

ASJ-137-M-T/R

Adam TechIn Stock: 958ASJ-137-M-T/R Datasheet

Current PartRFQ

SJ-43514-SMT-TR

CUI DevicesIn Stock: 35159SJ-43514-SMT-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Connector Type & Gender: Must be Phone Jack, Female configuration
• Mating Diameter: Must be 4.60mm (0.141", 1/8", Mini Plug) - Headphone standard
• Signal Configuration: Must be Stereo (4 Conductor, TRRS)
• Number of Contacts: Must be 4 Conductors, 4 Contacts
• Mounting Type: Must be Surface Mount, Right Angle
• Termination Method: Must be Solder
• Electrical Ratings: Voltage and current ratings must meet or exceed the original specification
• Regulatory Compliance: Must maintain ROHS3 and REACH compliance status

The SJ-43514-SMT-TR from CUI Devices satisfies all mandatory substitution criteria, providing functional and mechanical equivalence while offering improved availability through active product status.

Parameter Comparison

Engineering Selection Recommendations

The SJ-43514-SMT-TR qualifies as a direct functional substitute for the ASJ-137-M-T/R based on matching mechanical, electrical, and regulatory specifications. Both connectors maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental directives.

The primary advantage of the SJ-43514-SMT-TR is active product status with substantial inventory availability (35,100 units), compared to the obsolete ASJ-137-M-T/R (866 units remaining). This substitution is appropriate for new designs, redesigns of legacy systems, and ongoing production support where component continuity is required.

The voltage rating differential (30VDC vs. 12VDC) is not a limiting factor for audio jack applications, which typically operate at signal-level voltages well below both specifications. The contact plating difference (gold vs. silver) and housing material variation (thermoplastic vs. polyamide nylon) do not compromise functional equivalence for stereo audio signal transmission.

Frequently Asked Questions (FAQ)

Q: Can the SJ-43514-SMT-TR be used as a direct replacement for the ASJ-137-M-T/R in existing PCB designs?

A: Yes. Both connectors share identical mating diameter (4.60mm), signal configuration (4-conductor TRRS), mounting type (surface mount, right angle), and termination method (solder). PCB footprint compatibility requires verification of specific pad layouts and mating length dimensions, but electrical and mechanical substitution is valid.

Q: What is the significance of the voltage rating difference (30VDC vs. 12VDC)?

A: Audio jack connectors operate at signal-level voltages, typically in the millivolt to low-volt range. Both ratings exceed typical audio application requirements. The 12VDC rating of the SJ-43514-SMT-TR is sufficient for standard headphone, microphone, and line-level audio circuits.

Q: Are there differences in contact plating that affect signal quality?

A: The ASJ-137-M-T/R uses gold plating; the SJ-43514-SMT-TR uses silver plating. Both materials provide excellent conductivity and corrosion resistance for audio signal transmission. Silver plating is widely used in professional audio connectors and does not compromise stereo signal integrity.

Q: What packaging options are available for the SJ-43514-SMT-TR?

A: The SJ-43514-SMT-TR is supplied in Cut Tape (CT) and Digi-Reel packaging formats, suitable for both manual assembly and automated pick-and-place manufacturing processes.

Q: Is the operating temperature range of the SJ-43514-SMT-TR (-20°C ~ 85°C) adequate for my application?

A: The specified range covers standard commercial and industrial audio equipment operating environments. Verify that your application requirements fall within this range; if extended temperature operation is required, consult the connector manufacturer for alternative options.

Q: Do both connectors require the same PCB footprint?

A: Both connectors use surface-mount, right-angle configuration with identical mating diameter and contact count. Verify mating length/depth dimensions (0.551" for the SJ-43514-SMT-TR) against your PCB layout to confirm footprint compatibility.