MF-RHT1000-AP Equivalent & Substitute Parts

Part Overview

The MF-RHT1000-AP is a polymeric PTC resettable fuse manufactured by Bourns Inc., designed for circuit protection in applications requiring automatic reset capability. This component operates at 16V maximum voltage with a 10A hold current and is rated for automotive-grade reliability under AEC-Q200 standards. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, supply chain alternatives, or inventory optimization.

Substiute Parts

MF-RHT1000-AP

Bourns Inc.In Stock: 1097MF-RHT1000-AP Datasheet

Current PartRFQ

0ZRN1000FF1A

Bel Fuse Inc.In Stock: 17070ZRN1000FF1A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MF-RHT1000-AP is determined by strict equivalence across the following critical parameters:

• Voltage rating: 16V maximum
• Hold current: 10A maximum
• Trip current: 18.5A
• Time to trip: 9 seconds
• Initial resistance: 6.2 mOhms minimum
• Post-trip resistance: 15 mOhms maximum
• Operating temperature range: -40°C to 125°C
• Mounting configuration: Through hole radial disc package
• Physical dimensions: 17.50mm length x 3.00mm width with 10.20mm lead spacing
• Compliance: RoHS3 and AEC-Q200 ratings

The substitute part 0ZRN1000FF1A from Bel Fuse Inc. meets all specified electrical and mechanical parameters within the defined tolerances, enabling direct functional replacement in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-RHT1000-AP and 0ZRN1000FF1A are active production components with identical electrical specifications and equivalent mechanical form factors. Selection between these parts may be based on:

• Manufacturer availability and lead time
• Supply chain requirements or preferred vendor relationships
• Inventory status (MF-RHT1000-AP: 992 pcs; 0ZRN1000FF1A: 1611 pcs)
• Approval agency certifications (0ZRN1000FF1A carries cURus, TUV, and UL approvals)
• Seated height tolerance (MF-RHT1000-AP: 26.70mm; 0ZRN1000FF1A: 26.50mm)

Both parts satisfy AEC-Q200 automotive-grade requirements and RoHS3 compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can the 0ZRN1000FF1A directly replace the MF-RHT1000-AP in existing designs?

A: Yes. Both parts share identical electrical parameters (16V, 10A hold, 18.5A trip, 9s response time) and mechanical specifications (radial disc package, 17.50mm x 3.00mm dimensions, 10.20mm lead spacing). The seated height difference of 0.20mm (26.70mm vs. 26.50mm) is within typical PCB assembly tolerances.

Q: What are the critical parameters that define substitution eligibility?

A: Voltage rating, hold current, trip current, time to trip, initial and post-trip resistance values, operating temperature range, and physical package dimensions must match exactly. All listed parameters meet these criteria.

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

A: Both parts are AEC-Q200 rated and RoHS3 compliant. The 0ZRN1000FF1A carries additional approvals from cURus, TUV, and UL. Both are rated for unlimited moisture sensitivity (MF-RHT1000-AP) or not applicable (0ZRN1000FF1A).

Q: What is the functional difference between hold current and trip current?

A: Hold current (Ih) is the maximum continuous current the fuse allows without activation. Trip current (It) is the threshold at which the PTC element activates and increases resistance to limit current flow. The MF-RHT1000-AP and 0ZRN1000FF1A both specify 10A hold and 18.5A trip.

Q: Can these parts be used interchangeably in automotive applications?

A: Yes. Both parts meet AEC-Q200 automotive-grade standards and operate across the required temperature range of -40°C to 125°C, making them suitable for automotive circuit protection.