14A-20-12 Equivalent & Substitute Parts

Part Overview

The 14A-20-12 is a laminated core power transformer manufactured by Signal Transformer, rated at 20VA with dual primary and secondary windings. The transformer supports input voltages of 115V or 230V and delivers output configurations of parallel 6.3V at 3.2A or series 12.6V at 1.6A. This through-hole mounted component is designed for PC pin termination and maintains 4000Vrms isolation voltage. The part is active in production and RoHS3 compliant, making it suitable for modern electronic applications requiring regulated power distribution in compact form factors.

Equivalent and substitute parts are identified when they maintain identical electrical specifications, mechanical compatibility, and mounting characteristics while potentially offering different sourcing options, packaging formats, or compliance certifications.

Substiute Parts

14A-20-12

Signal TransformerIn Stock: 102014A-20-12 Datasheet

Current PartRFQ

PL20-12-130B

TamuraIn Stock: 866PL20-12-130B Datasheet

DirectRFQ

VPP12-1600

Triad MagneticsIn Stock: 808VPP12-1600 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 14A-20-12 are qualified based on strict electrical and mechanical parameter matching:

Electrical Equivalence Criteria:

• Identical power rating: 20VA
• Matching primary voltage inputs: 115V, 230V
• Matching secondary voltage outputs: Parallel 6.3V and Series 12.6V
• Matching output current ratings: Parallel 3.2A and Series 1.6A
• Dual primary and dual secondary winding configuration
• Laminated core construction
• Through-hole mounting with PC pin termination

Mechanical Compatibility Criteria:

• Dimensional compatibility within manufacturing tolerances
• Height seated maximum within acceptable range for PCB assembly
• Isolation voltage rating maintained at or above 4000Vrms

Compliance Considerations:

• RoHS compliance status (RoHS3 or equivalent)
• ECCN and HTSUS classifications for regulatory alignment

The following parts meet all substitution criteria: VPP12-1600 (Triad Magnetics) and PL20-12-130B (Tamura).

Parameter Comparison

Engineering Selection Recommendations

All three parts—14A-20-12, VPP12-1600, and PL20-12-130B—are active products with established compliance certifications suitable for production applications.

14A-20-12 (Signal Transformer): Primary choice with RoHS3 compliance, 4000Vrms isolation, and established One-4-All™ series availability. Packaged in box format with 927 units in stock.

VPP12-1600 (Triad Magnetics): Direct electrical and mechanical equivalent with RoHS3 compliance and 4000Vrms isolation matching the primary part. Dimensions are within tolerance (57.15mm vs 57.20mm length). Packaged in box format with 739 units in stock. Suitable for direct substitution without design modification.

PL20-12-130B (Tamura): Meets all electrical and mechanical requirements with RoHS compliance. Isolation voltage is 3500Vrms, which is 500V lower than the primary specification. Dimensions match the primary part exactly. Packaged in bulk format with 843 units in stock. Selection depends on whether the reduced isolation voltage is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can VPP12-1600 replace 14A-20-12 without PCB redesign?

A: Yes. VPP12-1600 maintains identical electrical specifications and mechanical dimensions within manufacturing tolerance. Both feature through-hole PC pin termination and identical mounting footprints. No PCB layout changes are required.

Q: What is the significance of the 500Vrms isolation voltage difference between 14A-20-12 and PL20-12-130B?

A: The 14A-20-12 provides 4000Vrms isolation while PL20-12-130B provides 3500Vrms. This difference affects the maximum voltage stress the transformer can withstand between primary and secondary windings. Selection of PL20-12-130B requires confirmation that 3500Vrms isolation is sufficient for the application's safety and regulatory requirements.

Q: Are packaging differences between these parts significant?

A: 14A-20-12 and VPP12-1600 are supplied in box packaging, while PL20-12-130B is supplied in bulk packaging. This affects handling, storage, and inventory management but does not impact electrical or mechanical performance. Component selection should consider procurement volume and logistics requirements.

Q: Do all three parts meet current RoHS requirements?

A: 14A-20-12 and VPP12-1600 are RoHS3 compliant. PL20-12-130B is RoHS compliant. Both compliance levels are acceptable for modern applications, though RoHS3 represents the most current standard.

Q: Are there any dimensional constraints that would prevent substitution?

A: All three parts maintain compatible dimensions. Length and width differences are negligible (57.15–57.20mm and 47.60–47.63mm). Height seated maximum values are within 0.02mm tolerance (41.28–41.30mm), ensuring compatibility with standard PCB assembly processes.