MF-RHT300-AP Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The MF-RHT300-AP is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 16V maximum voltage with a 3A hold current. This component is designed for overcurrent protection in electronic circuits and automatically resets after a fault condition is cleared. The part is currently in active production status with AEC-Q200 automotive-grade qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

MF-RHT300-AP

Bourns Inc.In Stock: 860MF-RHT300-AP Datasheet

Current PartRFQ

0ZRN0300FF1E

Bel Fuse Inc.In Stock: 18910ZRN0300FF1E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-RHT300-AP are qualified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitutability:

Electrical Parameters (Critical):

• Voltage - Max: 16V
• Current - Hold (Ih) (Max): 3 A
• Current - Trip (It): 6 A
• Current - Max: 100 A
• Time to Trip: 5 s
• Resistance - Initial (Ri) (Min): 33 mOhms
• Resistance - Post Trip (R1) (Max): 79 mOhms
• Operating Temperature: -40°C ~ 125°C

Mechanical Parameters (Critical):

• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Size / Dimension: 0.346" L x 0.118" W (8.80mm x 3.00mm)
• Height - Seated (Max): 0.543" (13.80mm)
• Lead Spacing: 0.201" (5.10mm)

Compliance Parameters:

• Type: Polymeric
• Ratings: AEC-Q200
• RoHS Status: ROHS3 Compliant

All identified substitutes meet these parameters identically.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-RHT300-AP and 0ZRN0300FF1E are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

Compliance and Certifications: The 0ZRN0300FF1E carries additional third-party approvals (cURus, TUV, UL) beyond the AEC-Q200 rating shared by both parts. Applications requiring these specific certifications should specify the Bel Fuse component.

Product Status: Both components maintain active production status, ensuring continued availability and supply chain stability.

RoHS Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Interchangeability: The parts are electrically and mechanically interchangeable within the specified parameters. PCB layout and circuit design require no modification when substituting between these components.

Frequently Asked Questions (FAQ)

Q: Can the 0ZRN0300FF1E replace the MF-RHT300-AP in existing designs?

A: Yes. Both components share identical electrical ratings (16V, 3A hold current, 6A trip current), identical mechanical dimensions (0.346" L x 0.118" W, 5.10mm lead spacing), and identical operating temperature range (-40°C ~ 125°C). No circuit or PCB modifications are required.

Q: What are the key parameters that determine substitutability for this PTC resettable fuse?

A: Substitutability is determined by: maximum voltage rating, hold current, trip current, maximum current, time to trip, initial and post-trip resistance values, operating temperature range, mounting type (through hole), package style (radial disc), physical dimensions, and lead spacing. All these parameters must match exactly.

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

A: The MF-RHT300-AP does not specify approval agencies in the provided data. The 0ZRN0300FF1E carries cURus, TUV, and UL approvals. Applications requiring these specific certifications should use the Bel Fuse component.

Q: Do both parts have the same moisture sensitivity level?

A: The MF-RHT300-AP has MSL 1 (Unlimited). The 0ZRN0300FF1E lists MSL as Not Applicable. Both are suitable for standard handling and storage conditions.

Q: What is the lead spacing for these components?

A: Both the MF-RHT300-AP and 0ZRN0300FF1E have a lead spacing of 0.201" (5.10mm), ensuring compatibility with standard PCB footprints designed for radial disc-mounted through-hole components.

Q: Are both parts currently available?

A: Yes. The MF-RHT300-AP has 777 pcs in stock, and the 0ZRN0300FF1E has 1798 pcs in stock. Both maintain active production status.