MET-24 Audio Transformer Equivalent & Substitute Parts

Part Overview

The MET-24 is a 1.5kCT:600 ohm audio transformer manufactured by Tamura, designed for data/voice coupling applications. This through-hole mounted component operates across the 300Hz to 100kHz frequency range with ±2dB frequency response and is currently in active production status. The MET-24 maintains RoHS compliance and is available in tube packaging with 1068 pieces in current inventory.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and operational parameters align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

MET-24

TamuraIn Stock: 1081MET-24 Datasheet

Current PartRFQ

SP-52

Triad MagneticsIn Stock: 2422SP-52 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MET-24 are identified based on strict electrical and mechanical parameter alignment. The substitution logic requires matching of the following critical parameters:

Critical Matching Parameters:

• Impedance Primary: 1.5kCT ohms
• Impedance Secondary: 600 ohms
• Turns Ratio: 1.58:1
• Frequency Range: 300Hz ~ 100kHz minimum
• Frequency Response: ±2dB or better
• Mounting Type: Through Hole
• Physical Dimensions: 0.409" L x 0.310" W (10.40mm x 7.87mm) with height 0.465" (11.80mm) maximum
• Termination Style: PC Pin

Important Compatibility Parameters:

• Power Level: 50mW minimum rating
• Operating Temperature Range: Must encompass or exceed -20°C ~ 85°C
• Voltage Isolation: 500VRMS minimum
• DC Resistance tolerance within acceptable circuit performance margins
• RoHS compliance status

The SP-52 manufactured by Triad Magnetics qualifies as a direct substitute based on matching all critical electrical parameters, mechanical dimensions, mounting configuration, and termination style. Variations in secondary parameters such as isolation voltage rating, operating temperature range, and packaging format do not preclude substitution when the primary functional requirements are met.

Parameter Comparison

Engineering Selection Recommendations

MET-24 (Tamura) - Primary Selection

The MET-24 remains the primary component choice when:

• Original design specifications explicitly reference Tamura MET series components
• Tube packaging format is required for manufacturing processes
• Existing inventory of 1068 pieces supports production schedules
• Design has been validated and qualified with this specific manufacturer part number

SP-52 (Triad Magnetics) - Substitute Selection

The SP-52 qualifies as a direct electrical and mechanical substitute when:

• Impedance matching at 1.5kCT primary and 600 ohm secondary is required
• Frequency response of ±2dB across 300Hz to 100kHz is specified
• Through-hole mounting with PC pin termination is required
• Physical envelope of 0.409" x 0.310" x 0.465" maximum height is constrained
• Both RoHS compliance and ROHS3 compliance satisfy regulatory requirements
• Extended operating temperature range of -40°C to 85°C provides additional thermal margin
• Enhanced isolation voltage rating of 1000VRMS provides increased safety margin

DC resistance variations between MET-24 (160Ohm primary, 95Ohm secondary) and SP-52 (168Ohm primary, 92Ohm secondary) remain within acceptable engineering tolerances for audio coupling transformer applications and do not compromise circuit performance.

Frequently Asked Questions (FAQ)

Q: Can SP-52 be used as a direct replacement for MET-24 in existing circuit designs?

A: Yes. The SP-52 matches all critical electrical parameters including impedance, turns ratio, frequency range, and frequency response. Physical dimensions and mounting configuration are identical. PC pin termination is compatible with existing PCB layouts designed for MET-24.

Q: What are the differences in DC resistance between MET-24 and SP-52?

A: MET-24 primary DCR is 160 ohms versus SP-52 at 168 ohms (8 ohm difference). Secondary DCR is 95 ohms for MET-24 versus 92 ohms for SP-52 (3 ohm difference). These variations fall within normal manufacturing tolerances for audio transformer applications and do not affect circuit functionality.

Q: Does the SP-52 operate across the same temperature range as MET-24?

A: The SP-52 operating temperature range of -40°C to 85°C exceeds the MET-24 specification of -20°C to 85°C. This provides additional thermal margin and is compatible with applications requiring the MET-24 temperature range.

Q: Are isolation voltage ratings interchangeable between MET-24 and SP-52?

A: The SP-52 isolation rating of 1000VRMS at 1 second exceeds the MET-24 rating of 500VRMS at 1 minute. Applications designed for MET-24 isolation specifications are fully compatible with SP-52, which provides enhanced isolation performance.

Q: What packaging differences exist between MET-24 and SP-52?

A: MET-24 is supplied in tube packaging while SP-52 is supplied in bulk packaging. Both components are identical in electrical performance and physical dimensions. Packaging selection depends on manufacturing process requirements and inventory management practices.

Q: Are both components RoHS compliant?

A: Yes. MET-24 is RoHS Compliant and SP-52 is ROHS3 Compliant. Both satisfy RoHS regulatory requirements for electronic component manufacturing and assembly.

Q: What is the frequency response specification for both transformers?

A: Both MET-24 and SP-52 maintain ±2dB frequency response across the 300Hz to 100kHz operating range, ensuring consistent audio coupling performance throughout the specified bandwidth.

Q: Can physical dimensions be used to verify compatibility?

A: Yes. Both components share identical physical dimensions of 0.409" length x 0.310" width (10.40mm x 7.87mm) with maximum seated height of 0.465" (11.80mm). These dimensions ensure mechanical compatibility with existing PCB layouts and component placement requirements.