DST4-16B10 Equivalent & Substitute Parts

Part Overview

The DST4-16B10 is a 6VA laminated core power transformer manufactured by Pulse Electronics, designed for through-hole mounting applications. This component features dual primary and secondary windings with selectable voltage configurations (115V/230V primary, 8V/16V secondary). The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Power Rating	6VA
Primary Voltage	115V, 230V
Secondary Voltage (Full Load)	Parallel 8V, Series 16V
Output Current (Max)	Parallel 800mA, Series 400mA
Core Type	Laminated
Primary Windings	Dual
Secondary Windings	Dual
Mounting Type	Through Hole
Termination Style	PC Pin
Isolation Voltage	2500Vrms

Substitute Part Grouping Explanation

Substitute parts for the DST4-16B10 are qualified based on strict electrical and mechanical parameter matching:

Electrical Equivalence Criteria:

Identical power rating (6VA)
Matching primary voltage options (115V, 230V)
Matching secondary voltage configuration (Parallel 8V, Series 16V)
Matching maximum output current (Parallel 800mA, Series 400mA)
Identical core type (Laminated)
Matching winding configuration (Dual primary, Dual secondary)
Matching isolation voltage (2500Vrms)

Mechanical Equivalence Criteria:

Through-hole mounting type
PC pin termination style
Compatible physical dimensions (length and width within manufacturing tolerance)

All three substitute parts meet these criteria and are therefore direct functional equivalents for the obsolete DST4-16B10.

Parameter Comparison

Parameter	DST4-16B10 (Pulse)	DST-4-16 (Signal)	3FD-416 (Tamura)	FS16-400 (Triad)
Power Rating	6VA	6VA	6VA	6VA
Primary Voltage	115V, 230V	115V, 230V	115V, 230V	115V, 230V
Secondary Voltage	Parallel 8V, Series 16V	Parallel 8V, Series 16V	Parallel 8V, Series 16V	Parallel 8V, Series 16V
Output Current (Max)	Parallel 800mA, Series 400mA	Parallel 800mA, Series 400mA	Parallel 800mA, Series 400mA	Parallel 800mA, Series 400mA
Core Type	Laminated	Laminated	Laminated	Laminated
Primary Windings	Dual	Dual	Dual	Dual
Secondary Windings	Dual	Dual	Dual	Dual
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin
Isolation Voltage	2500Vrms	2500Vrms	2500Vrms	2500Vrms
Length	41.40mm	41.30mm	41.50mm	41.28mm
Width	33.27mm	33.30mm	34.83mm	33.32mm
Height (Seated Max)	33.27mm	33.30mm	38.00mm	33.32mm
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

DST-4-16 (Signal Transformer): Active product status with ROHS3 compliance. Dimensions closely match the original part (41.30mm L × 33.30mm W × 33.30mm H). Highest inventory availability (4008 pcs). Recommended for applications requiring minimal PCB layout modification.

3FD-416 (Tamura): Active product status with RoHS compliance. Dimensions show minor variation in height (38.00mm vs. 33.27mm seated height). Suitable for applications with vertical clearance tolerance. Highest inventory stock (4809 pcs).

FS16-400 (Triad Magnetics): Active product status with ROHS3 compliance. Dimensions nearly identical to original part (41.28mm L × 33.32mm W × 33.32mm H). Packaged in box format. Suitable for direct replacement in existing designs.

All three substitutes provide equivalent electrical performance and meet current regulatory compliance standards.

Frequently Asked Questions (FAQ)

Q: Can DST-4-16, 3FD-416, and FS16-400 be used interchangeably with DST4-16B10?

A: Yes. All three parts meet identical electrical specifications (6VA, 115V/230V primary, 8V/16V secondary, 2500Vrms isolation) and mechanical requirements (through-hole mounting, PC pin termination). Physical dimensions are within acceptable manufacturing tolerance for PCB mounting.

Q: What is the primary difference between the substitute parts?

A: The main differences are manufacturer, product status (all active), packaging format, and minor dimensional variations. The 3FD-416 has a maximum seated height of 38.00mm compared to approximately 33.30mm for the other substitutes. This may affect PCB layout in space-constrained applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. DST-4-16 and FS16-400 are ROHS3 compliant. 3FD-416 is RoHS compliant. All meet current environmental regulations.

Q: Which substitute offers the best inventory availability?

A: 3FD-416 (Tamura) has the highest stock level at 4809 pcs, followed by DST-4-16 (Signal Transformer) at 4008 pcs, and FS16-400 (Triad Magnetics) at 1269 pcs.

Q: Are there packaging considerations when selecting a substitute?

A: Yes. DST-4-16 and FS16-400 are supplied in box packaging, while 3FD-416 is supplied in tube packaging. Packaging format may affect handling, storage, and integration into automated assembly processes.

Q: Can the 3FD-416 be used in applications with limited vertical clearance?

A: The 3FD-416 has a maximum seated height of 38.00mm, which is 4.70mm taller than the original DST4-16B10 (33.27mm). Applications with tight vertical constraints should use DST-4-16 or FS16-400 instead.

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