FS48-125 Laminated Power Transformer Equivalent & Substitute Parts

Part Overview

The FS48-125 is a 6VA laminated core power transformer manufactured by Triad Magnetics, designed for through-hole mounting applications. This transformer features dual primary and secondary windings, supporting configurable output voltages of 24V (parallel) or 48V (series) with corresponding maximum output currents of 250mA or 125mA respectively. The part is currently in active production status with 672 units in stock inventory.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Power Rating	6VA
Primary Voltage	115V, 230V
Secondary Voltage (Parallel)	24V
Secondary Voltage (Series)	48V
Maximum Output Current (Parallel)	250mA
Maximum Output Current (Series)	125mA
Core Type	Laminated
Primary Windings	Dual
Secondary Windings	Dual
Center Tap	No
Mounting Type	Through Hole
Termination Style	PC Pin
Isolation Voltage	2500Vrms
Physical Dimensions	41.28mm L × 33.32mm W × 33.32mm H
Weight	0.44 lb (199.58 g)
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FS48-125 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Power rating: 6VA
Primary voltage configuration: 115V/230V dual input
Secondary voltage outputs: 24V (parallel) and 48V (series)
Output current capacity: 250mA (parallel) and 125mA (series)
Isolation voltage: 2500Vrms
Winding configuration: Dual primary, dual secondary, no center tap

Mechanical Specifications:

Core type: Laminated
Mounting: Through-hole
Termination: PC pin
Physical footprint: 41.28mm L × 33.32mm W × 33.32mm H
Weight: 0.44 lb (199.58 g)

Compliance Requirements:

RoHS3 compliance
REACH unaffected status
ECCN: EAR99
HTSUS: 8504.31.4035

The 162F48 manufactured by Hammond Manufacturing meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Parameter	FS48-125 (Triad Magnetics)	162F48 (Hammond Manufacturing)	Match Status
Power Rating	6VA	6VA	Identical
Primary Voltage	115V, 230V	115V, 230V	Identical
Secondary Voltage (Parallel)	24V	24V	Identical
Secondary Voltage (Series)	48V	48V	Identical
Output Current (Parallel)	250mA	250mA	Identical
Output Current (Series)	125mA	125mA	Identical
Core Type	Laminated	Laminated	Identical
Primary Windings	Dual	Dual	Identical
Secondary Windings	Dual	Dual	Identical
Center Tap	No	No	Identical
Mounting Type	Through Hole	Through Hole	Identical
Termination Style	PC Pin	PC Pin	Identical
Isolation Voltage	2500Vrms	2500Vrms	Identical
Dimensions	41.28mm L × 33.32mm W × 33.32mm H	41.28mm L × 33.32mm W × 33.32mm H	Identical
Weight	0.44 lb (199.58 g)	0.44 lb (199.58 g)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical
HTSUS Code	8504.31.4035	8504.31.4035	Identical

Engineering Selection Recommendations

The 162F48 from Hammond Manufacturing is a direct electrical and mechanical equivalent to the FS48-125. Both parts are active production items with current inventory availability. Selection between these two parts may be based on:

Supply Chain Considerations:

FS48-125: 672 units in stock (Triad Magnetics)
162F48: 958 units in stock (Hammond Manufacturing)

Packaging Differences:

FS48-125: Supplied in box packaging
162F48: Supplied in bulk packaging

Both parts maintain identical compliance certifications (ROHS3, REACH unaffected, EAR99) and are suitable for direct substitution in through-hole PCB applications requiring 6VA laminated core power transformation with dual primary and secondary winding configurations.

Frequently Asked Questions (FAQ)

Q: Can the 162F48 be used as a direct replacement for the FS48-125 in existing designs?

A: Yes. The 162F48 meets all electrical specifications (6VA power rating, 115V/230V primary input, 24V/48V secondary output, 250mA/125mA current capacity, 2500Vrms isolation), mechanical specifications (through-hole mounting, PC pin termination, identical footprint and weight), and compliance requirements (ROHS3, REACH unaffected) of the FS48-125. No circuit modifications are required.

Q: Are there dimensional differences between these parts?

A: No. Both the FS48-125 and 162F48 share identical physical dimensions of 41.28mm length × 33.32mm width × 33.32mm height and identical weight of 0.44 lb (199.58 g). PCB layout and mechanical mounting are interchangeable.

Q: What is the difference between parallel and series secondary winding configuration?

A: The FS48-125 and 162F48 feature dual secondary windings that can be configured in parallel (24V output at 250mA maximum) or series (48V output at 125mA maximum). Configuration is determined by winding connection during PCB assembly and cannot be changed after installation.

Q: Do these transformers include center tap connections?

A: No. Both the FS48-125 and 162F48 do not include center tap connections. The secondary windings are configured only for parallel or series operation.

Q: What packaging formats are available?

A: The FS48-125 is supplied in box packaging, while the 162F48 is supplied in bulk packaging. Both contain identical components; packaging format selection depends on inventory management and procurement requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the FS48-125 and 162F48 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

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