MF-RG500-0-14 Equivalent & Substitute Parts

Part Overview

The MF-RG500-0-14 is a polymeric PTC resettable fuse manufactured by Bourns Inc. under the Multifuse® series. This component provides overcurrent protection with a 5 A hold current rating and 16 V maximum voltage specification. The device is designed for through-hole radial mounting in disc configuration and is currently in active product status with 1039 units in stock.

PTC resettable fuses are essential in circuit protection applications where automatic recovery after fault conditions is required. Equivalent and substitute parts are identified when they maintain identical electrical performance parameters, mechanical compatibility, and regulatory compliance across different manufacturers.

Substiute Parts

MF-RG500-0-14

Bourns Inc.In Stock: 1109MF-RG500-0-14 Datasheet

Current PartRFQ

RGEF500K

LittelfuseIn Stock: 1109RGEF500K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RG500-0-14 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

• Voltage - Maximum: 16 V
• Current - Hold (Ih) Maximum: 5 A
• Current - Trip (It): 8.5 A
• Current - Maximum: 100 A
• Time to Trip: 2 s
• Resistance - Initial (Ri) Minimum: 15 mOhms
• Resistance - Post Trip (R1) Maximum: 34 mOhms
• Operating Temperature Range: -40°C to 85°C

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Type: Polymeric

Regulatory Compliance:

• RoHS3 Compliant
• REACH Unaffected
• ECCN: EAR99

The RGEF500K from Littelfuse meets all electrical and mechanical requirements for direct substitution with the MF-RG500-0-14.

Parameter Comparison

Engineering Selection Recommendations

The RGEF500K from Littelfuse is a direct electrical and mechanical equivalent to the MF-RG500-0-14. Both components are active products with current manufacturing status and full regulatory compliance under RoHS3 and REACH standards.

Selection Criteria:

Both parts satisfy identical functional requirements for 16 V, 5 A polymeric PTC resettable fuse applications with through-hole radial mounting. The electrical characteristics, including hold current, trip current, response time, and resistance specifications, are identical across both components.

Regulatory certifications differ between manufacturers: the MF-RG500-0-14 carries AEC-Q200, cUL, and cURus approvals, while the RGEF500K carries CSA, TUV, and UL approvals. Selection between these parts should be based on specific application certification requirements.

Physical dimensions show minor variations: the MF-RG500-0-14 measures 0.409" L × 0.118" W (10.40 mm × 3.00 mm), while the RGEF500K measures 0.390" L × 0.098" W (9.90 mm × 2.50 mm). Both maintain identical height when seated at 0.563" (14.30 mm) and lead spacing within 0.201" to 0.199" (5.10 mm to 5.05 mm). These dimensional differences are within typical PCB layout tolerances for radial disc components.

Frequently Asked Questions (FAQ)

Q: Can RGEF500K replace MF-RG500-0-14 in existing designs?

A: Yes. The RGEF500K meets all electrical specifications, operating temperature range, and mechanical mounting requirements of the MF-RG500-0-14. Both components are polymeric PTC resettable fuses with identical hold current (5 A), trip current (8.5 A), and voltage rating (16 V). Verify that the application's certification requirements align with the RGEF500K's approval agencies (CSA, TUV, UL) rather than the MF-RG500-0-14's certifications (AEC-Q200, cUL, cURus).

Q: Are there dimensional compatibility concerns?

A: Minor dimensional differences exist. The RGEF500K is slightly smaller in length and width (9.90 mm × 2.50 mm versus 10.40 mm × 3.00 mm). Lead spacing is nearly identical (5.05 mm versus 5.10 mm). These variations are within standard PCB layout tolerances for radial disc components and do not affect electrical performance or mounting compatibility.

Q: What is the difference in packaging between these parts?

A: The MF-RG500-0-14 is supplied in bulk packaging, while the RGEF500K is supplied in bag packaging. This distinction affects inventory management and handling procedures but does not impact component functionality or performance.

Q: Do both parts have identical electrical performance?

A: Yes. Both components share identical electrical specifications: 16 V maximum voltage, 5 A hold current, 8.5 A trip current, 2 second trip time, 15 mOhms minimum initial resistance, and 34 mOhms maximum post-trip resistance. Operating temperature range is identical at -40°C to 85°C.

Q: Which certifications apply to each part?

A: The MF-RG500-0-14 carries AEC-Q200, cUL, and cURus approvals. The RGEF500K carries CSA, TUV, and UL approvals. Select the part whose certifications match your application requirements.

Q: Are both parts currently available?

A: Yes. Both components are in active product status. The MF-RG500-0-14 has 1039 units in stock, and the RGEF500K has 1089 units in stock.