MF72-008D13 Inrush Current Limiter - Equivalent & Substitute Parts

Part Overview

The MF72-008D13 is an inrush current limiter manufactured by Cantherm, designed for thermal protection in power supply circuits and motor startup applications. This thermistor operates at 8 Ohms resistance at 25°C with ±20% tolerance and supports a steady-state maximum current of 4 A. The component features a 0.610" (15.50mm) diameter cylindrical form factor with 0.295" (7.50mm) lead spacing, supplied in bulk packaging.

The MF72-008D13 maintains Active product status and is ROHS3 compliant. Substitute components are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable.

Substiute Parts

MF72-008D13

CanthermIn Stock: 768MF72-008D13 Datasheet

Current PartRFQ

B57238S0809M051

EPCOS - TDK ElectronicsIn Stock: 997B57238S0809M051 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF72-008D13 are identified based on strict electrical and mechanical parameter alignment. The substitution logic requires:

Electrical Parameters (Critical):

• Resistance value: 8 Ohms at 25°C
• Tolerance: ±20%
• Steady-state current rating: Equal to or greater than 4 A

Mechanical Parameters (Important):

• Cylindrical form factor with comparable diameter (15.50mm nominal)
• Lead spacing compatible with standard PCB layouts (7.50mm nominal)

Compliance Parameters:

• ROHS3 compliance status
• Active product status for ongoing availability

The B57238S0809M051 qualifies as a substitute because it meets all critical electrical parameters (8 Ohms ±20%, 5.5 A steady-state rating) and maintains mechanical compatibility within acceptable tolerances. The slightly larger diameter (16.00mm vs 15.50mm) and increased current rating (5.5 A vs 4 A) represent design improvements that do not compromise circuit function.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The MF72-008D13 remains the specified component for applications where Cantherm sourcing is established and inventory is available. Current stock of 723 pieces supports immediate procurement.

Substitute Part Selection: The B57238S0809M051 is suitable for applications requiring component substitution. Selection criteria include:

• Circuit design accepts the 5.5 A steady-state rating (exceeds 4 A minimum requirement)
• Mechanical envelope accommodates 16.00mm diameter (0.50mm larger than original)
• ROHS3 compliance requirement is met
• Active product status ensures continued availability

The lower resistance at current (131 mOhms vs 194 mOhms) in the substitute part indicates improved thermal performance characteristics. This parameter difference does not prevent substitution but should be verified against specific thermal management requirements in the application circuit.

Packaging Consideration: The MF72-008D13 is supplied in bulk packaging, while the B57238S0809M051 is supplied in cut tape format. Procurement and assembly processes must accommodate this packaging difference.

Frequently Asked Questions (FAQ)

Q: Can the B57238S0809M051 directly replace the MF72-008D13 in my circuit?

A: Yes, the B57238S0809M051 meets all critical electrical parameters. Both components have 8 Ohms resistance at ±20% tolerance. The substitute's 5.5 A rating exceeds the 4 A requirement. Mechanical fit must be verified for your specific PCB layout, as the diameter is 0.50mm larger.

Q: What is the significance of the different resistance values at current (194 mOhms vs 131 mOhms)?

A: These values represent the resistance measured at the specified steady-state current. The lower value in the substitute indicates different thermal characteristics. Both values fall within acceptable operating parameters for inrush current limiting applications. Verify against your thermal design specifications.

Q: Are both parts ROHS3 compliant?

A: Yes, both the MF72-008D13 and B57238S0809M051 are ROHS3 compliant. Both meet current environmental and regulatory requirements for electronic component manufacturing.

Q: Does the packaging difference (Bulk vs Cut Tape) affect component performance?

A: No, packaging format does not affect electrical or thermal performance. The difference impacts procurement, storage, and assembly processes only. Verify your assembly equipment compatibility with cut tape format if substituting.

Q: What is the lead spacing for the B57238S0809M051?

A: Lead spacing is not specified in the provided data. Standard inrush current limiter lead spacing of 7.50mm is typical for this component class. Verify against your PCB footprint before final selection.

Q: Can I use the MF72-008D13 in applications rated for 5.5 A?

A: The MF72-008D13 is rated for 4 A steady-state maximum current. Using it in a 5.5 A application exceeds its thermal rating and is not recommended. Use the B57238S0809M051 for higher current applications.

Q: Are there any other substitute parts available?

A: Based on the provided data, the B57238S0809M051 is the identified substitute. Additional alternatives may exist but are not included in this reference.