ST5-16B11 Equivalent & Substitute Parts

Part Overview

The ST5-16B11 is a laminated core power transformer manufactured by Pulse Electronics, rated at 12VA with a 115V primary voltage and dual secondary windings capable of 8V parallel or 16V series output. This through-hole mounted component is designed for applications requiring isolated AC power conversion with dual output configurations. The part is currently active in production with full RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory certifications align with the original design requirements.

Substiute Parts

ST5-16B11

Pulse ElectronicsIn Stock: 1088ST5-16B11 Datasheet

Current PartRFQ

3FS-516

TamuraIn Stock: 8863FS-516 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST5-16B11 is determined by strict alignment of the following electrical and mechanical parameters:

• Power Rating: 12VA (exact match required)
• Primary Voltage: 115V (exact match required)
• Secondary Voltage Configuration: Dual windings with 8V parallel and 16V series capability (exact match required)
• Secondary Current Capacity: 1.6A parallel / 800mA series (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 (minimum requirement)

The substitute part 3FS-516 manufactured by Tamura meets all electrical specifications and regulatory requirements. Dimensional variations within manufacturing tolerances do not affect functional compatibility in standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

The 3FS-516 from Tamura is a direct functional equivalent to the ST5-16B11. Both components are active production parts with identical electrical specifications, core type, mounting configuration, and regulatory compliance status. The dimensional differences (length, width, and height) fall within standard manufacturing tolerances for through-hole transformers and do not impact PCB layout compatibility for standard applications. Selection between these parts should be based on availability, lead time, packaging format (Pulse Electronics supplied in standard packaging; Tamura supplied in tube packaging), and procurement cost considerations.

Frequently Asked Questions (FAQ)

Q: Can the 3FS-516 be used as a direct replacement for the ST5-16B11 in existing designs?

A: Yes. Both parts meet identical electrical specifications (12VA, 115V primary, 8V/16V secondary, 1.6A/800mA current capacity), use laminated cores, feature through-hole PC pin termination, and provide 2500Vrms isolation. Dimensional variations are within standard manufacturing tolerances for through-hole components.

Q: Are there any compliance differences between these parts?

A: No. Both the ST5-16B11 and 3FS-516 are RoHS Compliant, carry EAR99 ECCN classification, and share the same HTSUS code (8504.31.4035). Both maintain unlimited moisture sensitivity rating (MSL 1).

Q: What is the significance of the packaging difference?

A: The ST5-16B11 is supplied in standard packaging, while the 3FS-516 is supplied in tube packaging. This affects handling, storage, and automated assembly processes but does not impact electrical or mechanical performance.

Q: Are the dimensional differences critical for PCB layout?

A: No. The dimensional variations (approximately 1.26mm in length, 1.90mm in width, and 1.42mm in height) are within standard manufacturing tolerances for through-hole transformers and do not require PCB redesign for typical applications.

Q: Can both parts be used interchangeably in dual-output applications?

A: Yes. Both transformers support identical dual secondary winding configurations with parallel (8V, 1.6A) and series (16V, 800mA) output modes, making them functionally interchangeable for applications requiring flexible output voltage selection.