241-3-28 Equivalent & Substitute Parts

Part Overview

The 241-3-28 is a laminated core power transformer manufactured by Signal Transformer, rated at 2.4VA with a 115V primary and 28V secondary output. This chassis mount transformer is designed for applications requiring isolated low-voltage power conversion with a maximum output current of 85mA. The part is Active status and RoHS3 compliant, making it suitable for modern electronic equipment requiring regulatory compliance. Equivalent and substitute parts are identified when design requirements, supply constraints, or application specifications necessitate alternative component selection while maintaining functional compatibility.

Substiute Parts

241-3-28

Signal TransformerIn Stock: 953241-3-28 Datasheet

Current PartRFQ

186B28

Hammond ManufacturingIn Stock: 746186B28 Datasheet

DirectRFQ

F3-28

Triad MagneticsIn Stock: 935F3-28 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 241-3-28 are identified based on the following critical parameters that determine functional compatibility:

Primary Selection Criteria:

• Voltage - Primary: 115V
• Voltage - Secondary: 28V
• Center Tap: Yes
• Mounting Type: Chassis Mount
• Type: Laminated Core
• Termination Style: Solder, Quick Connect

Allowable Variation Parameters:

• Current - Output (Max): Equal to or greater than 85mA
• Power - Max: Equal to or greater than 2.4VA
• Voltage - Isolation: Equal to or greater than 2500Vrms
• Physical dimensions: Variations acceptable within chassis mount constraints
• Packaging: Bulk or Box formats both acceptable

The substitute parts F3-28 and 186B28 meet the core functional requirements. F3-28 provides direct electrical equivalence with identical ratings. 186B28 offers enhanced current capacity (200mA vs. 85mA) and power rating (5.6VA vs. 2.4VA), with dual primary voltage capability (115V/230V), making it suitable for applications requiring higher output current or multi-voltage input flexibility.

Parameter Comparison

Engineering Selection Recommendations

F3-28 (Triad Magnetics): This part provides direct electrical and mechanical equivalence to the 241-3-28. All primary electrical parameters are identical, including voltage ratings, current capacity, and isolation voltage. Both parts are Active status with ROHS3 compliance and REACH unaffected designation. Physical dimensions differ slightly (41.28mm L x 30.15mm W vs. 52.60mm L x 29.60mm W), which may provide space advantages in compact chassis designs. This substitute is appropriate for direct replacement applications with no design modifications required.

186B28 (Hammond Manufacturing): This part exceeds the electrical specifications of the 241-3-28, offering 200mA output current (versus 85mA) and 5.6VA power rating (versus 2.4VA). The dual primary winding configuration enables operation at both 115V and 230V inputs, providing additional application flexibility. The isolation voltage is 2000Vrms, which is lower than the 241-3-28 (2500Vrms) but remains suitable for standard industrial and commercial applications. This substitute is appropriate for applications requiring higher output current capacity or multi-voltage input capability. Physical dimensions are larger (60.20mm L x 41.28mm W), requiring verification of chassis mounting space.

All three parts maintain Active product status and full regulatory compliance (ROHS3, REACH unaffected, EAR99 ECCN classification).

Frequently Asked Questions (FAQ)

Q: Can F3-28 be used as a direct replacement for 241-3-28? A: Yes. The F3-28 provides identical electrical specifications (115V primary, 28V secondary, 85mA output, 2.4VA power) and equivalent isolation voltage (2500VAC). Both are chassis mount transformers with center tap and identical termination styles. Physical dimensions vary slightly, requiring verification of mounting space in the specific application.

Q: When should 186B28 be selected instead of F3-28? A: The 186B28 should be selected when the application requires output current exceeding 85mA or when dual primary voltage input (115V/230V) capability is needed. The 186B28 provides 200mA maximum output current and 5.6VA power rating, making it suitable for higher-load applications. Verify that the larger physical dimensions (60.20mm L x 41.28mm W) accommodate the chassis mounting space.

Q: Are there any isolation voltage differences between these parts? A: Yes. The 241-3-28 and F3-28 both provide 2500V isolation (2500Vrms and 2500VAC respectively). The 186B28 provides 2000Vrms isolation, which is 500V lower. For applications requiring the higher isolation specification, the 241-3-28 or F3-28 must be used.

Q: What are the packaging differences? A: The 241-3-28 and F3-28 are supplied in Bulk packaging. The 186B28 is supplied in Box packaging. Both packaging formats are acceptable for component procurement; selection depends on inventory management and quantity requirements.

Q: Do all three parts meet current regulatory requirements? A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. All parts maintain Active product status.

Q: Are the termination styles compatible across all three parts? A: All three parts feature Solder and Quick Connect termination styles. The F3-28 specifies Quick Connect as 0.187" (4.7mm), which is the standard quick connect terminal size. Verify terminal compatibility with the specific application circuit board or wiring harness design.