MF72-200D5 Inrush Current Limiter Equivalent & Substitute Parts

Part Overview

The MF72-200D5 is an inrush current limiter manufactured by Cantherm, rated at 200 Ohms ±20% with a maximum steady-state current of 100 mA and a physical diameter of 0.276" (7.00mm). This component is classified as obsolete product status. Due to its obsolete designation, locating equivalent or substitute components from active product lines becomes necessary for ongoing system maintenance, repair, and new design implementations where this thermal protection function is required.

Substiute Parts

MF72-200D5

CanthermIn Stock: 885MF72-200D5 Datasheet

Current PartRFQ

MF72-200D7

CanthermIn Stock: 10205MF72-200D7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MF72-200D5 is determined by the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 200 Ohms ±20%
• Tolerance: ±20%
• Series family: MF72 (Cantherm inrush current limiter series)
• Compliance standards: ROHS3 Compliant, REACH Unaffected

Secondary Considerations:

• Current rating capacity (steady-state maximum)
• Physical dimensions (diameter and lead spacing)
• Product status (active vs. obsolete)

The MF72-200D7 qualifies as a substitute because it maintains identical electrical characteristics (200 Ohms, ±20% tolerance) within the same MF72 series and meets all regulatory compliance requirements. The primary difference is an increased current capacity (200 mA vs. 100 mA) and larger physical dimensions (0.354" diameter vs. 0.276" diameter).

Parameter Comparison

Engineering Selection Recommendations

MF72-200D7 as Primary Substitute:

The MF72-200D7 is the designated substitute for the obsolete MF72-200D5. Both components share identical electrical specifications (200 Ohms, ±20% tolerance) and belong to the same MF72 inrush current limiter series from Cantherm. The MF72-200D7 maintains full compliance with ROHS3 and REACH requirements, matching the regulatory status of the original part.

The MF72-200D7 is currently in active product status with substantial inventory availability (10,104 pieces), ensuring supply chain continuity. The increased current rating (200 mA vs. 100 mA) provides enhanced operational margin in applications where the original 100 mA specification was marginal or where future design flexibility is required.

Physical Dimension Considerations:

The MF72-200D7 features larger physical dimensions (0.354" diameter and 0.197" lead spacing compared to 0.276" diameter and 0.098" lead spacing). PCB layout modifications may be necessary to accommodate the larger component footprint. Lead spacing changes require verification of circuit board trace routing and component placement constraints.

Frequently Asked Questions (FAQ)

Q: Can the MF72-200D7 directly replace the MF72-200D5 in all applications?

A: Electrical substitution is valid because both components maintain 200 Ohms ±20% resistance and identical tolerance specifications. However, physical dimensions differ. The MF72-200D7 is larger (0.354" vs. 0.276" diameter) with wider lead spacing (0.197" vs. 0.098"). PCB layout compatibility must be assessed before implementation.

Q: What is the significance of the different current ratings (100 mA vs. 200 mA)?

A: The MF72-200D5 is rated for 100 mA steady-state maximum current, while the MF72-200D7 is rated for 200 mA. The MF72-200D7 provides double the current capacity. In applications operating at or near the 100 mA limit, the MF72-200D7 offers improved operational margin and thermal performance.

Q: Why is the MF72-200D5 listed as obsolete?

A: The MF72-200D5 is designated obsolete by the manufacturer. The MF72-200D7 represents the active product line continuation within the MF72 series, offering equivalent electrical function with enhanced specifications and current availability.

Q: Are there compliance or certification differences between these parts?

A: Both components are ROHS3 Compliant and REACH Unaffected. No compliance or certification differences exist between the MF72-200D5 and MF72-200D7.

Q: What is the R @ Current specification, and why does it differ between parts?

A: R @ Current represents the resistance measured at the specified current level. The MF72-200D5 shows 18.7 Ohms at 100 mA, while the MF72-200D7 shows 11.65 Ohms at 200 mA. This difference reflects the thermal and material characteristics of each component design at their respective rated currents.

Q: Can the MF72-200D7 be used in space-constrained PCB designs?

A: The MF72-200D7 requires larger PCB footprint space due to its 0.354" diameter (vs. 0.276" for the MF72-200D5) and wider lead spacing (0.197" vs. 0.098"). Space-constrained designs must evaluate whether the larger component can be accommodated within existing layout constraints.