ST3-16B9 Equivalent & Substitute Parts

Part Overview

The ST3-16B9 is a laminated core power transformer manufactured by Pulse Electronics, designed for through-hole mounting applications. This split bobbin plug-in transformer delivers 2.4VA maximum power with dual secondary windings configured for parallel (8V, 300mA) or series (16V, 150mA) output modes. The component is RoHS compliant and maintains active product status, making it suitable for industrial and commercial power supply designs requiring isolated AC-DC conversion.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, ensuring functional interchangeability in target applications.

Substiute Parts

ST3-16B9

Pulse ElectronicsIn Stock: 1180ST3-16B9 Datasheet

Current PartRFQ

F16-150-C2

Triad MagneticsIn Stock: 1325F16-150-C2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The F16-150-C2 manufactured by Triad Magnetics qualifies as a direct substitute for the ST3-16B9 based on the following critical parameters:

• Identical primary voltage specification (115V)
• Matching secondary voltage outputs in both parallel (8V) and series (16V) configurations
• Equivalent output current ratings (300mA parallel, 150mA series)
• Comparable power rating (2.5VA vs. 2.4VA, within acceptable tolerance)
• Identical core type (laminated)
• Matching winding configuration (single primary, dual secondary)
• Compatible mounting and termination (through hole, PC pin)
• Equivalent isolation voltage performance (4200Vrms exceeds 2500Vrms requirement)

Both components maintain active product status and RoHS compliance, confirming suitability for direct replacement in equivalent circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Both the ST3-16B9 and F16-150-C2 maintain active product status and meet current regulatory compliance requirements (RoHS and REACH). The F16-150-C2 provides enhanced isolation voltage performance (4200Vrms vs. 2500Vrms), offering additional safety margin in high-voltage isolation applications. Dimensional variations exist between the two components; verify PCB layout compatibility before substitution. The F16-150-C2 is supplied in tube packaging, whereas the ST3-16B9 packaging specification was not provided. Both components are suitable for direct electrical substitution where mechanical fit permits.

Frequently Asked Questions (FAQ)

Q: Can the F16-150-C2 replace the ST3-16B9 in existing designs?

A: Yes. Both transformers provide identical electrical specifications for primary voltage (115V), secondary voltages (8V parallel, 16V series), and output current ratings (300mA parallel, 150mA series). Verify mechanical fit within the PCB layout, as dimensional differences exist between the two models.

Q: What are the key differences between these two transformers?

A: The primary differences are manufacturer (Pulse Electronics vs. Triad Magnetics), isolation voltage rating (2500Vrms vs. 4200Vrms), power rating (2.4VA vs. 2.5VA), and physical dimensions. Electrical performance and winding configuration remain equivalent.

Q: Are there any compliance or certification differences?

A: Both components are RoHS compliant and REACH unaffected. The F16-150-C2 carries ROHS3 certification, representing a more recent compliance standard. Both maintain active product status.

Q: What should be verified before substituting these parts?

A: Confirm PCB footprint compatibility by comparing the dimensional specifications (length, width, and seated height). Verify that the higher isolation voltage of the F16-150-C2 does not introduce unintended circuit behavior. Confirm packaging requirements align with assembly processes.

Q: Are both parts currently available?

A: Both components are listed as active products with inventory availability. Verify current stock status with your component supplier before finalizing procurement decisions.