MET-05 Audio Transformer Equivalent & Substitute Parts

Part Overview

The MET-05 is an active audio coupling transformer manufactured by Tamura, designed for data and voice coupling applications. It features a 5:1 turns ratio with 25kCT primary impedance and 1kCT secondary impedance, operating across the 300Hz to 100kHz frequency range. The component is packaged in through-hole configuration with PC pin termination and is RoHS compliant. This transformer is suitable for applications requiring impedance matching and signal isolation in audio frequency circuits. Finding equivalent or substitute parts may be necessary due to inventory constraints, lead time requirements, or design optimization needs while maintaining electrical and mechanical compatibility.

Substiute Parts

MET-05

TamuraIn Stock: 1120MET-05 Datasheet

Current PartRFQ

SP-13

Triad MagneticsIn Stock: 1248SP-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MET-05 with the SP-13 (Triad Magnetics) is based on the following alignment of critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Identical turns ratio of 5:1 ensures proportional voltage and impedance transformation
• Primary impedance options include 25kCT (matching MET-05 specification)
• Secondary impedance options include 1kCT (matching MET-05 specification)
• Frequency range of 300Hz ~ 100kHz matches the operational bandwidth
• Frequency response of ±2dB matches the performance specification
• Transformer type classification as audio coupling maintains functional equivalence

Mechanical Compatibility Criteria:

• Through-hole mounting type matches the MET-05 configuration
• PC pin termination style is identical
• Physical dimensions are equivalent: 0.410" L x 0.310" W (10.41mm x 7.87mm) for SP-13 versus 0.409" L x 0.310" W (10.40mm x 7.87mm) for MET-05
• Maximum seated height of 0.465" (11.80mm) is identical

Compliance and Environmental Criteria:

• Both components are RoHS compliant
• Both operate within overlapping temperature ranges (-40°C ~ 85°C for SP-13 encompasses -20°C ~ 85°C for MET-05)

Parameter Comparison

Engineering Selection Recommendations

MET-05 (Tamura) Selection Criteria:

• Primary choice when Tamura series components are specified in design documentation
• Preferred for applications requiring MSL Level 1 classification with unlimited moisture exposure tolerance
• Suitable when inventory of 1065 pieces in tube packaging meets procurement requirements
• Appropriate for designs with operating temperature floor of -20°C

SP-13 (Triad Magnetics) Selection Criteria:

• Suitable as equivalent substitute when Tamura MET-05 is unavailable or subject to extended lead times
• Preferred for applications benefiting from higher power level rating (40mW versus 30mW)
• Appropriate for designs requiring higher voltage isolation rating (1000VRMS versus 500VRMS)
• Suitable for applications with extended low-temperature operating requirements (-40°C versus -20°C)
• Acceptable when bulk packaging meets procurement logistics
• Compliant with ROHS3 and REACH requirements for regulated markets

Both components maintain active product status and are suitable for new design implementations. The SP-13 offers enhanced electrical ratings while maintaining mechanical and functional equivalence to the MET-05.

Frequently Asked Questions (FAQ)

Q: Can SP-13 directly replace MET-05 in existing PCB designs?

A: Yes. The SP-13 maintains identical through-hole mounting type, PC pin termination style, and maximum seated height of 0.465" (11.80mm). Physical dimensions are equivalent within manufacturing tolerance (0.410" versus 0.409" length). No PCB layout modifications are required.

Q: Are the electrical characteristics of SP-13 compatible with MET-05 circuit applications?

A: Yes. Both transformers provide identical 5:1 turns ratio, 300Hz to 100kHz frequency range, and ±2dB frequency response. The SP-13 offers equivalent impedance options (25kCT primary, 1kCT secondary) with DC resistance values within acceptable variance (1.7kOhm primary, 115Ohm secondary). The SP-13 provides higher power level (40mW) and voltage isolation (1000VRMS) ratings, making it suitable for the same applications and more demanding scenarios.

Q: What is the difference in packaging between MET-05 and SP-13?

A: MET-05 is supplied in tube packaging with 1065 pieces in stock. SP-13 is supplied in bulk packaging with 1215 pieces in stock. Both are through-hole components with identical termination style. Packaging selection depends on procurement and assembly process requirements.

Q: Are both components RoHS compliant?

A: Yes. MET-05 is RoHS compliant. SP-13 is ROHS3 compliant, representing a more recent compliance standard. Both meet RoHS requirements for regulated applications.

Q: What is the operating temperature range difference?

A: MET-05 operates from -20°C to 85°C. SP-13 operates from -40°C to 85°C. The SP-13 extended low-temperature range encompasses the MET-05 specification, making it suitable for applications requiring operation below -20°C.

Q: How do the DC resistance values compare?

A: MET-05 primary DCR is 1.6kOhm with secondary DCR of 95Ohm. SP-13 primary DCR is 1.7kOhm with secondary DCR of 115Ohm. These differences represent 6.25% and 21.05% variance respectively and are within acceptable tolerance for audio coupling transformer applications.

Q: Is moisture sensitivity a consideration for substitution?

A: MET-05 is classified as MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions. SP-13 is listed as Not Applicable for MSL, indicating it does not require moisture sensitivity management. Both are suitable for standard storage and handling conditions.