ST4-10B2 Equivalent & Substitute Parts

Part Overview

The ST4-10B2 is a laminated core power transformer manufactured by Pulse Electronics, rated at 6VA with a 115V primary voltage and dual secondary windings providing parallel 5V or series 10V outputs. This through-hole mounted component is designed for PC pin termination and is currently in active production status with RoHS compliance and 2500Vrms isolation rating.

Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

ST4-10B2

Pulse ElectronicsIn Stock: 781ST4-10B2 Datasheet

Current PartRFQ

3FS-410

TamuraIn Stock: 11233FS-410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST4-10B2 are qualified based on the following critical parameters that determine functional and mechanical interchangeability:

• Power Rating: 6VA (exact match required)
• Primary Voltage: 115V (exact match required)
• Secondary Voltage Configuration: Parallel 5V and Series 10V (exact match required)
• Output Current Capability: Parallel 1.2A and Series 600mA (exact match required)
• Core Type: Laminated (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pin (exact match required)
• Isolation Voltage: 2500Vrms (exact match required)
• Regulatory Compliance: RoHS Compliant (exact match required)

The 3FS-410 manufactured by Tamura meets all critical electrical and mechanical parameters, confirming direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

Both the ST4-10B2 and 3FS-410 are active production components with identical electrical specifications and RoHS compliance. Selection between these parts should be based on:

• Availability and Lead Time: Verify current inventory status with suppliers, as stock levels vary.
• Packaging Format: ST4-10B2 is supplied in standard packaging; 3FS-410 is supplied in tube packaging.
• Physical Dimensions: While electrical parameters are identical, dimensional tolerances differ slightly. Verify PCB layout clearances, particularly for height (33.27mm vs. 34.55mm) and width (33.27mm vs. 34.83mm).
• Regulatory Documentation: Both parts carry identical compliance certifications (RoHS, REACH Unaffected, EAR99, HTSUS 8504.31.4035).

Frequently Asked Questions (FAQ)

Q: Can the 3FS-410 be used as a direct replacement for the ST4-10B2?

A: Yes. Both parts meet identical electrical specifications: 6VA power rating, 115V primary voltage, dual secondary windings (5V parallel / 10V series), 1.2A parallel / 600mA series output current, 2500Vrms isolation, and RoHS compliance. Physical dimensions vary slightly; verify PCB layout compatibility before substitution.

Q: What are the key parameters that determine substitution eligibility?

A: Power rating, primary voltage, secondary voltage configuration, output current capability, core type, mounting type, termination style, isolation voltage, and regulatory compliance must all match exactly. Any deviation in these parameters disqualifies a part from direct substitution.

Q: Are there differences in packaging between these parts?

A: Yes. The ST4-10B2 uses standard packaging, while the 3FS-410 is supplied in tube packaging. This affects handling, storage, and automated assembly processes.

Q: Do both parts have the same physical footprint?

A: No. While both are through-hole mounted with PC pin termination, dimensional differences exist: length (41.40mm vs. 41.50mm), width (33.27mm vs. 34.83mm), and height (33.27mm vs. 34.55mm). Verify PCB layout clearances before substitution.

Q: Are both parts currently in production?

A: Yes. Both the ST4-10B2 and 3FS-410 maintain active production status with established supply chains.