FS36-550 Equivalent & Substitute Parts Reference

Part Overview

The FS36-550 is a laminated core power transformer manufactured by Triad Magnetics, rated at 20VA with dual primary and secondary windings. This through-hole mounted component is designed for applications requiring flexible voltage configurations through series and parallel winding connections. The part is currently in active production status with 854 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original design requirements, enabling direct replacement in circuit applications without redesign.

Key Parameters

Parameter	Value
Power Rating	20VA
Primary Voltage Options	115V, 230V
Secondary Voltage (Parallel)	18V
Secondary Voltage (Series)	36V
Output Current - Parallel	1.1A
Output Current - Series	550mA
Core Type	Laminated
Primary Windings	Dual
Secondary Windings	Dual
Mounting Type	Through Hole
Termination Style	PC Pin
Isolation Voltage	2500Vrms
Dimensions (L × W × H)	57.15mm × 47.63mm × 36.50mm
Weight	0.8 lb (362.87 g)
RoHS Compliance	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the FS36-550 are identified based on strict equivalence across the following critical parameters:

Electrical Specifications:

Identical power rating (20VA)
Matching primary voltage inputs (115V, 230V)
Identical secondary voltage outputs in both parallel (18V) and series (36V) configurations
Matching output current capabilities (1.1A parallel, 550mA series)
Equivalent isolation voltage rating (2500Vrms)
Dual primary and dual secondary winding configuration

Mechanical Specifications:

Through-hole mounting compatibility
PC pin termination style
Laminated core construction
Footprint dimensions within tolerance (57.15mm L × 47.63mm W)
Height compatibility for PCB assembly

Compliance & Status:

Active product status
ROHS3 compliance
REACH unaffected classification
EAR99 export classification

The Hammond Manufacturing 162H36 meets all electrical and mechanical equivalence criteria, differing only in packaging format (bulk vs. box) and minor height tolerance variation (36.52mm vs. 36.50mm).

Parameter Comparison

Parameter	FS36-550 (Triad Magnetics)	162H36 (Hammond Manufacturing)	Match Status
Power Rating	20VA	20VA	Equivalent
Primary Voltage	115V, 230V	115V, 230V	Equivalent
Secondary Voltage (Parallel)	18V	18V	Equivalent
Secondary Voltage (Series)	36V	36V	Equivalent
Output Current (Parallel)	1.1A	1.1A	Equivalent
Output Current (Series)	550mA	550mA	Equivalent
Core Type	Laminated	Laminated	Equivalent
Primary Windings	Dual	Dual	Equivalent
Secondary Windings	Dual	Dual	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Termination Style	PC Pin	PC Pin	Equivalent
Isolation Voltage	2500Vrms	2500Vrms	Equivalent
Length	57.15mm	57.15mm	Equivalent
Width	47.63mm	47.63mm	Equivalent
Height (Seated Max)	36.50mm	36.52mm	Within Tolerance
Weight	0.8 lb (362.87 g)	0.8 lb (362.87 g)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Primary Part Selection: The FS36-550 (Triad Magnetics) is the original specified component with 854 units in current inventory. Selection of this part is appropriate for new designs and ongoing production where supply is confirmed.

Substitute Part Selection: The 162H36 (Hammond Manufacturing) is a direct electrical and mechanical equivalent suitable for applications where the FS36-550 is unavailable or where supply chain diversification is required. Both parts maintain identical electrical performance across all specified voltage and current configurations. The 0.02mm height difference (36.52mm vs. 36.50mm) is within standard PCB assembly tolerances and does not affect circuit functionality or board layout compatibility.

Compliance Basis: Both parts carry ROHS3 compliance certification and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. Both are classified as EAR99 for export purposes.

Inventory Consideration: The FS36-550 maintains higher current stock (854 units) compared to the 162H36 (824 units), supporting immediate availability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 162H36 be used as a direct replacement for the FS36-550 in existing circuit designs?

A: Yes. The 162H36 is electrically and mechanically equivalent across all specified parameters. Both parts provide identical voltage outputs (18V parallel, 36V series), current ratings (1.1A parallel, 550mA series), and isolation voltage (2500Vrms). Through-hole mounting and PC pin termination are identical, enabling direct PCB substitution without circuit modification.

Q: What is the significance of the packaging difference (Box vs. Bulk)?

A: Packaging format affects only component handling and storage logistics. The electrical and mechanical specifications of the transformer itself remain unchanged. Box packaging (FS36-550) typically includes individual component protection, while bulk packaging (162H36) is suited for high-volume manufacturing environments with integrated component management systems.

Q: Is the 0.02mm height difference between parts a concern for PCB assembly?

A: No. The height variation (36.50mm vs. 36.52mm) falls within standard PCB assembly tolerances and does not affect board layout, component clearance, or functional performance. Both parts are compatible with standard through-hole assembly processes.

Q: Are both parts suitable for applications requiring 2500Vrms isolation?

A: Yes. Both the FS36-550 and 162H36 are rated for 2500Vrms isolation voltage, meeting high-voltage isolation requirements in industrial control, medical device, and power supply applications.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for EU and international markets. Both are classified as EAR99 for export control purposes.

Q: Can these transformers be configured for different voltage outputs?

A: Yes. Both parts feature dual primary and dual secondary windings, enabling flexible configuration. Primary windings support 115V or 230V input selection. Secondary windings can be connected in parallel (18V output at 1.1A) or series (36V output at 550mA) to match application requirements.

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