Equivalent & Substitute Parts for 241-5-28

Part Overview

The Signal Transformer 241-5-28 is a laminated core power transformer rated at 12VA with a single primary winding (115V) and single secondary winding (28V) featuring center tap configuration. This chassis mount transformer is designed for applications requiring isolated 28V output at up to 420mA maximum current. The part is currently active in production with full RoHS3 compliance and 2500Vrms isolation rating. Substitute parts may be required due to inventory constraints, application-specific mounting requirements, or performance envelope adjustments within compatible electrical specifications.

Substiute Parts

241-5-28

Signal TransformerIn Stock: 814241-5-28 Datasheet

Current PartRFQ

186D28

Hammond ManufacturingIn Stock: 817186D28 Datasheet

DirectRFQ

F5-28

Triad MagneticsIn Stock: 1137F5-28 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 241-5-28 is determined by the following critical parameters:

Primary Substitution Criteria:

• Secondary voltage output: 28V (full load)
• Center tap configuration: Required
• Mounting type: Chassis mount
• Termination style: Solder and quick connect compatible
• RoHS3 compliance: Required
• Laminated core construction: Required

Secondary Compatibility Factors:

• Primary voltage input: 115V minimum (dual voltage primary acceptable)
• Maximum output current: ≥420mA
• Power rating: ≥12VA
• Isolation voltage: ≥2500V
• Physical dimensions: Compatible with chassis mount footprint

The substitute parts listed below meet or exceed these criteria while maintaining functional equivalence for standard 28V isolated power applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (F5-28 - Triad Magnetics): The F5-28 from Triad Magnetics Quick Pack series provides direct functional equivalence to the 241-5-28. Both transformers share identical electrical specifications: 115V primary, 28V secondary with center tap, 420mA maximum output current, and 12VA power rating. Physical dimensions are nearly identical (71.42mm vs 71.40mm length; 34.93mm vs 36.30mm width), with height difference of 1.52mm. Both maintain 2500V isolation and ROHS3 compliance. The F5-28 is suitable for direct substitution in existing designs without circuit modification. Termination connectors are specified as 0.187" (4.7mm) quick connect, compatible with standard chassis mount applications.

Higher-Capacity Alternative (186D28 - Hammond Manufacturing): The Hammond 186D28 offers increased power capacity (30VA vs 12VA) and higher maximum output current (1.07A vs 420mA) while maintaining 28V secondary voltage and center tap configuration. The dual primary winding design supports both 115V and 230V input, providing operational flexibility across different supply voltages. Isolation voltage is rated at 2000Vrms, which is 500V lower than the 241-5-28 but remains suitable for standard industrial applications. Physical dimensions are larger (82.55mm x 52.20mm vs 71.40mm x 36.30mm), requiring verification of available chassis space. The 186D28 is appropriate for applications requiring higher current delivery or dual-voltage input capability, provided physical constraints permit the larger footprint.

All substitute parts maintain active product status and full RoHS3 compliance, ensuring regulatory compliance and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the F5-28 replace the 241-5-28 in my existing circuit? A: Yes. The F5-28 provides direct electrical equivalence with identical primary voltage (115V), secondary voltage (28V), output current rating (420mA), and power rating (12VA). Physical dimensions are nearly identical, and both feature center tap configuration with compatible solder and quick connect termination. No circuit modification is required.

Q: What is the key difference between the 241-5-28 and 186D28? A: The primary differences are power capacity and primary winding configuration. The 186D28 provides 30VA (vs 12VA) and supports dual primary voltages (115V/230V vs 115V only). Maximum output current is 1.07A (vs 420mA). The 186D28 has larger physical dimensions and slightly lower isolation voltage (2000Vrms vs 2500Vrms). The 186D28 is suitable for higher-current applications or installations requiring dual-voltage input capability.

Q: Are there physical space constraints when substituting with the 186D28? A: Yes. The 186D28 is significantly larger: 82.55mm length and 52.20mm width compared to 71.40mm x 36.30mm for the 241-5-28. Height is also greater at 49.02mm versus 42.80mm. Verify available chassis space before selecting the 186D28 as a substitute.

Q: Do all substitute parts maintain the center tap configuration? A: Yes. Both the F5-28 and 186D28 include center tap on the secondary winding, matching the 241-5-28 specification. This configuration is preserved across all listed substitutes.

Q: Are the quick connect terminations compatible across all three transformers? A: The 241-5-28 and 186D28 specify solder and quick connect termination without dimensional constraints. The F5-28 specifies 0.187" (4.7mm) quick connect terminals. Verify connector compatibility with your existing harness or terminal blocks before substitution.

Q: What is the isolation voltage difference between these transformers? A: The 241-5-28 and F5-28 both provide 2500V isolation. The 186D28 provides 2000V isolation. For applications requiring maximum isolation margin, the 241-5-28 or F5-28 are preferred. The 186D28 remains suitable for standard industrial isolation requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. The 241-5-28, F5-28, and 186D28 are all ROHS3 compliant, ensuring regulatory compliance for EU and equivalent markets.