Equivalent & Substitute Parts for MF-R400-0-15

Part Overview

The MF-R400-0-15 is a polymeric PTC resettable fuse manufactured by Bourns Inc. in the Multifuse® MF-R series. This component provides overcurrent protection at 30V with a 4A hold current rating and is designed for through-hole radial mounting in disc configuration. The part is active in production with full RoHS3 compliance and cURus/TUV approval.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative sourcing is required for supply chain optimization, or when equivalent performance specifications from different manufacturers meet application requirements.

Substiute Parts

MF-R400-0-15

Bourns Inc.In Stock: 878MF-R400-0-15 Datasheet

Current PartRFQ

MF-R400

Bourns Inc.In Stock: 6497MF-R400 Datasheet

Parametric EquivalentRFQ

MF-R400-0-14

Bourns Inc.In Stock: 3447MF-R400-0-14 Datasheet

Parametric EquivalentRFQ

30R400UF

LittelfuseIn Stock: 477230R400UF Datasheet

DirectRFQ

FRU400-30F

RFE/FuzetecIn Stock: 1024FRU400-30F Datasheet

DirectRFQ

PTR030V0400-BK

Eaton - Electronics DivisionIn Stock: 1164PTR030V0400-BK Datasheet

DirectRFQ

RS30-400

OptiFuseIn Stock: 764RS30-400 Datasheet

DirectRFQ

PFRA.400

SCHURTER Inc.In Stock: 2173PFRA.400 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-R400-0-15 is determined by strict equivalence across the following critical parameters:

• Voltage - Max: 30V
• Current - Hold (Ih) (Max): 4 A
• Current - Trip (It): 8 A
• Time to Trip: 12.7 s
• Resistance - Initial (Ri) (Min): 10 mOhms
• Resistance - Post Trip (R1) (Max): 50 mOhms
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Lead Spacing: 0.201" (5.10mm)

All substitute parts listed meet these electrical and mechanical specifications. Variations in physical dimensions (length and height) are acceptable provided lead spacing remains within tolerance and the radial disc configuration is maintained for PCB compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with RoHS3 compliance and appropriate regulatory approvals (cURus, TUV, UL, cUL). Selection among equivalents should be based on:

Bourns Inc. parts (MF-R400, MF-R400-0-14): Highest inventory availability and identical electrical specifications to the primary part. MF-R400-0-14 includes AEC-Q200 automotive qualification and expanded approval agency coverage (cUL, cURus, TUV, UL).

Littelfuse 30R400UF: Direct equivalent with strong inventory position. Polymeric type confirmed with identical electrical performance.

RFE/Fuzetec FRU400-30F: Meets all electrical specifications with extended current-max rating (100A vs. 40A). Lower inventory availability.

Eaton PTR030V0400-BK: Polymeric type with full electrical equivalence. Lead spacing tolerance of 0.197" (5.00mm) versus 0.201" (5.10mm) requires PCB layout verification for radial mounting compatibility.

OptiFuse RS30-400: Polymeric type with equivalent electrical performance and extended current-max rating (100A). Moderate inventory availability.

SCHURTER PFRA.400: Polymeric type with identical electrical specifications and strong inventory position. MSL rating listed as Not Applicable.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with MF-R400-0-15?

A: Yes, all listed parts meet the critical electrical parameters (30V, 4A hold current, 8A trip current, 12.7s trip time, and resistance specifications). However, verify PCB layout compatibility for radial lead spacing, particularly for PTR030V0400-BK which has a 0.197" (5.00mm) lead spacing versus the standard 0.201" (5.10mm).

Q: What is the difference between MF-R400 and MF-R400-0-15?

A: Both are Bourns polymeric PTC resettable fuses with identical electrical specifications. MF-R400 is the base product number available in bulk packaging with higher inventory (6400 Pcs). MF-R400-0-15 is a specific variant with different packaging. Electrical performance is equivalent.

Q: Does MF-R400-0-14 offer advantages over MF-R400-0-15?

A: MF-R400-0-14 includes AEC-Q200 automotive qualification and broader approval agency coverage (cUL, cURus, TUV, UL versus cURus, TUV). Electrical specifications are identical. Selection depends on application requirements for automotive compliance.

Q: Are there differences in approval agencies among these parts?

A: Yes. MF-R400-0-14 includes cUL and UL approvals in addition to cURus and TUV. Most other parts carry cURus and TUV. FRU400-30F and RS30-400 include cUL or cULus approvals. Verify that the selected part's approval agencies meet your application and regional requirements.

Q: What is the significance of the lead spacing variation in PTR030V0400-BK?

A: PTR030V0400-BK has a 0.197" (5.00mm) lead spacing compared to the standard 0.201" (5.10mm) for other parts. This 0.004" (0.10mm) difference is minor but requires verification against PCB footprint tolerances to ensure proper radial mounting fit and solder joint quality.

Q: Which substitute offers the best inventory availability?

A: MF-R400 from Bourns Inc. has the highest inventory at 6400 Pcs. If Bourns parts are unavailable, 30R400UF (Littelfuse, 4675 Pcs) and PFRA.400 (SCHURTER, 2128 Pcs) offer strong secondary options.

Q: Are all these parts polymeric PTC resettable fuses?

A: Yes, all listed parts are polymeric PTC (Positive Temperature Coefficient) resettable fuses. FRU400-30F does not specify polymer type in the provided data but meets all electrical specifications for this category.