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MF72-020D13 Inrush Current Limiter Equivalent & Substitute Parts
Part Overview
The MF72-020D13 is an inrush current limiter manufactured by Cantherm, rated at 20 Ohms ±20% with a maximum steady-state current of 3 A. This component is designed to limit inrush current in power supply circuits and related applications. The part is currently in active production status with 1170 pieces available in stock.
Substitute parts may be required due to supply chain constraints, regional availability, or specific application requirements while maintaining equivalent electrical and mechanical performance within the specified parameter tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Resistance @ 25°C | 20 | Ohms |
| Tolerance | ±20 | % |
| Current - Steady State Max | 3 | A |
| Resistance @ Current | 372 | mOhms |
| Diameter | 0.610 | inches (15.50 mm) |
| Lead Spacing | 0.295 | inches (7.50 mm) |
| RoHS Status | ROHS3 Compliant | |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution eligibility for the MF72-020D13 is determined by the following critical parameters:
Electrical Parameters:
- Resistance @ 25°C: 20 Ohms (exact match required)
- Tolerance: ±20% (exact match required)
- Current - Steady State Max: 3 A (exact match required)
- Resistance @ Current: within acceptable operating range (372 mOhms reference)
Mechanical Parameters:
- Lead Spacing: 0.295 inches (7.50 mm) (exact match required for PCB compatibility)
- Diameter: tolerance acceptable within standard manufacturing ranges
Compliance Parameters:
- RoHS3 Compliant status required
- REACH Unaffected status required
Parts meeting all electrical and mechanical criteria with equivalent compliance certifications are classified as direct substitutes.
Parameter Comparison
| Parameter | MF72-020D13 (Cantherm) | B57211P0200M301 (EPCOS - TDK Electronics) | Match Status |
|---|---|---|---|
| Resistance @ 25°C | 20 Ohms | 20 Ohms | Exact Match |
| Tolerance | ±20% | ±20% | Exact Match |
| Current - Steady State Max | 3 A | 3 A | Exact Match |
| Resistance @ Current | 372 mOhms | 380 mOhms | Within Tolerance |
| Lead Spacing | 0.295" (7.50 mm) | 0.295" (7.50 mm) | Exact Match |
| Diameter | 0.610" (15.50 mm) | 0.512" (13.00 mm) | Different |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Exact Match |
| REACH Status | REACH Unaffected | REACH Unaffected | Exact Match |
| Product Status | Active | Active | Exact Match |
Engineering Selection Recommendations
B57211P0200M301 (EPCOS - TDK Electronics) Substitution Criteria:
The B57211P0200M301 qualifies as an electrical and compliance equivalent to the MF72-020D13. Both components share identical electrical specifications: 20 Ohms ±20% tolerance, 3 A maximum steady-state current, and equivalent resistance performance at operating current (372 mOhms vs. 380 mOhms, within tolerance band).
Lead spacing is identical at 0.295 inches (7.50 mm), ensuring PCB footprint compatibility. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for equivalent applications.
The primary mechanical difference is the component diameter: MF72-020D13 measures 0.610 inches (15.50 mm) while B57211P0200M301 measures 0.512 inches (13.00 mm). This dimensional variance requires physical space verification in the target application to confirm mechanical fit within the assembly.
Both parts are in active production status with adequate inventory availability.
Frequently Asked Questions (FAQ)
Q: Can B57211P0200M301 be used as a direct replacement for MF72-020D13?
A: B57211P0200M301 is electrically and compliance-equivalent to MF72-020D13. Both components have identical resistance (20 Ohms ±20%), current rating (3 A), and lead spacing (7.50 mm). However, the diameter difference (13.00 mm vs. 15.50 mm) requires verification that the smaller component physically fits within the available mounting space.
Q: Are the resistance values at operating current compatible?
A: Yes. MF72-020D13 specifies 372 mOhms at operating current, while B57211P0200M301 specifies 380 mOhms. This 8 mOhm difference falls within the ±20% tolerance band and does not affect functional equivalence.
Q: Do both parts meet the same regulatory requirements?
A: Yes. Both MF72-020D13 and B57211P0200M301 are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.
Q: What is the primary consideration when selecting between these parts?
A: The component diameter is the critical selection factor. Verify that the smaller diameter of B57211P0200M301 (13.00 mm) accommodates the available mounting space in your application. If space constraints exist, MF72-020D13 with its 15.50 mm diameter may be required.
Q: Are both parts currently available?
A: Yes. MF72-020D13 has 1170 pieces in stock, and B57211P0200M301 has 2381 pieces in stock, both listed as new original inventory.
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