Equivalent & Substitute Parts for F48-125 Laminated Power Transformer

Part Overview

The F48-125 is a laminated core power transformer manufactured by Triad Magnetics, rated at 6VA with dual secondary windings. This through-hole mounted component operates with a 115V primary voltage and provides configurable secondary outputs of 24V parallel or 48V series. The transformer is actively produced and maintains ROHS3 compliance with 2500Vrms isolation rating.

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and mounting characteristics align with the original component, enabling direct replacement in circuit applications without design modification.

Key Parameters

Parameter	Value
Power Rating	6VA
Primary Voltage	115V
Secondary Voltage (Parallel)	24V
Secondary Voltage (Series)	48V
Output Current - Parallel	250mA
Output Current - Series	125mA
Core Type	Laminated
Secondary Windings	Dual
Mounting Type	Through Hole
Termination Style	PC Pin
Isolation Voltage	2500Vrms
Dimensions (L x W)	41.28mm x 33.32mm
Height - Seated	33.32mm

Substitute Part Grouping Explanation

The F48-125 substitute relationship is established through strict equivalence of electrical and mechanical parameters. Substitution is valid when the following criteria are met:

Electrical Equivalence:

Primary voltage: 115V
Secondary voltage configuration: Dual windings with 24V parallel and 48V series outputs
Power capacity: 6VA
Output current ratings: 250mA parallel, 125mA series
Isolation voltage: 2500Vrms

Mechanical Equivalence:

Core type: Laminated
Mounting method: Through hole
Termination: PC pin
Physical dimensions: 41.28mm L x 33.32mm W x 33.32mm H seated
Weight: 0.44 lb (199.58 g)

Compliance Equivalence:

RoHS3 compliance
REACH unaffected status
ECCN: EAR99
HTSUS: 8504.31.4035

The 164F48 manufactured by Hammond Manufacturing satisfies all specified parameters and qualifies as a direct substitute.

Parameter Comparison

Parameter	F48-125 (Triad Magnetics)	164F48 (Hammond Manufacturing)	Match Status
Power Rating	6VA	6VA	Equivalent
Primary Voltage	115V	115V	Equivalent
Secondary Voltage - Parallel	24V	24V	Equivalent
Secondary Voltage - Series	48V	48V	Equivalent
Output Current - Parallel	250mA	250mA	Equivalent
Output Current - Series	125mA	125mA	Equivalent
Core Type	Laminated	Laminated	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
Dimensions (L x W)	41.28mm x 33.32mm	41.28mm x 33.32mm	Equivalent
Height - Seated	33.32mm	33.32mm	Equivalent
Weight	0.44 lb (199.58 g)	0.44 lb (199.58 g)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
ECCN	EAR99	EAR99	Equivalent
HTSUS Code	8504.31.4035	8504.31.4035	Equivalent

Engineering Selection Recommendations

Both the F48-125 and 164F48 transformers are active products with current manufacturing status. Selection between these components is based on availability, packaging format, and supply chain requirements rather than technical performance differences.

F48-125 (Triad Magnetics):

Packaging: Box format
Current inventory: 1026 pieces
Series designation: Split Pack™, Class 2/3, F

164F48 (Hammond Manufacturing):

Packaging: Bulk format
Current inventory: 812 pieces
Series designation: 164

Both components maintain ROHS3 compliance and REACH unaffected status. The MSL rating differs (F48-125 is not applicable; 164F48 is MSL 1 unlimited), indicating the Hammond part has no moisture sensitivity restrictions during storage and handling.

For applications requiring through-hole mounting with dual secondary winding configuration and 6VA power capacity at 115V primary input, either component satisfies all electrical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q: Can the 164F48 replace the F48-125 in existing circuit designs?

A: Yes. The 164F48 provides identical electrical specifications, mechanical dimensions, mounting configuration, and termination style. No circuit modification is required for direct substitution.

Q: What is the difference between Box and Bulk packaging?

A: Box packaging (F48-125) provides individual component packaging suitable for smaller quantity orders. Bulk packaging (164F48) is supplied without individual boxes, typically for higher volume procurement. Both contain the same transformer component.

Q: Are there differences in isolation voltage or safety ratings?

A: No. Both transformers provide 2500Vrms isolation voltage and maintain equivalent compliance certifications including ROHS3 and REACH unaffected status.

Q: Does the MSL rating difference affect component selection?

A: The F48-125 lists MSL as not applicable, while the 164F48 specifies MSL 1 (unlimited). This indicates the Hammond part has no moisture sensitivity restrictions. For standard storage and handling conditions, this difference does not impact component performance or reliability.

Q: Can these transformers be used in Class 2 or Class 3 applications?

A: The F48-125 is designated for Class 2/3 applications. The 164F48 specification does not explicitly state class designation in the provided parameters. Verify application requirements with the specific circuit design specifications.

Q: What output configurations are available with the dual secondary windings?

A: The dual secondary windings support two configurations: 24V at 250mA maximum current (parallel connection) or 48V at 125mA maximum current (series connection). Both transformers provide identical output flexibility.

Q: Are there inventory considerations for component selection?

A: Current inventory shows 1026 pieces of F48-125 and 812 pieces of 164F48 in stock. For time-sensitive applications, verify current availability with the supplier.

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