MF-RHT900-AP Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The MF-RHT900-AP is a polymeric PTC resettable fuse manufactured by Bourns Inc., designed for circuit protection in applications requiring 16V, 9A hold current operation. This component is classified as active product status and is widely used in automotive and industrial applications where automatic reset capability is required after fault conditions clear.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturers. The availability of alternative sources ensures supply chain flexibility and cost optimization without compromising circuit protection performance.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	9 A
Current - Trip (It)	16.5 A
Current - Max	100 A
Time to Trip	10 s
Resistance - Initial (Ri) (Min)	7.4 mOhms
Resistance - Post Trip (R1) (Max)	17 mOhms
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Size / Dimension	0.650" L x 0.118" W (16.50mm x 3.00mm)
Height - Seated (Max)	1.012" (25.70mm)
Lead Spacing	0.201" (5.10mm)
Type	Polymeric
RoHS Status	ROHS3 Compliant
Ratings	AEC-Q200

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RHT900-AP is determined by strict equivalence across the following critical parameters:

Voltage rating: 16V maximum
Hold current (Ih): 9A maximum
Trip current (It): 16.5A
Maximum current capacity: 100A
Time to trip: 10 seconds
Initial resistance (Ri): 7.4 mOhms minimum
Post-trip resistance (R1): 17 mOhms maximum
Operating temperature range: -40°C to 125°C
Mounting configuration: Through Hole Radial, Disc package
Physical dimensions: 0.650" L x 0.118" W with 0.201" lead spacing
Regulatory compliance: AEC-Q200, ROHS3 Compliant

The 0ZRN0900FF1A manufactured by Bel Fuse Inc. meets all specified parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	MF-RHT900-AP (Bourns)	0ZRN0900FF1A (Bel Fuse)
Voltage - Max	16V	16V
Current - Hold (Ih) (Max)	9 A	9 A
Current - Trip (It)	16.5 A	16.5 A
Current - Max	100 A	100 A
Time to Trip	10 s	10 s
Resistance - Initial (Ri) (Min)	7.4 mOhms	7.4 mOhms
Resistance - Post Trip (R1) (Max)	17 mOhms	17 mOhms
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc
Size / Dimension	0.650" L x 0.118" W (16.50mm x 3.00mm)	0.650" L x 0.118" W (16.50mm x 3.00mm)
Height - Seated (Max)	1.012" (25.70mm)	1.012" (25.70mm)
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)
Type	Polymeric	Polymeric
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Ratings	AEC-Q200	AEC-Q200
Product Status	Active	Active

Engineering Selection Recommendations

Both the MF-RHT900-AP and 0ZRN0900FF1A are active products with identical electrical and mechanical specifications. Selection between these components should be based on:

Supply chain availability and lead time requirements
Inventory levels at component distributors
Approval agency certifications: The 0ZRN0900FF1A carries additional certifications (cURus, TUV, UL) beyond the base AEC-Q200 rating
Cost and volume pricing structures from respective manufacturers
Existing qualification and design documentation within your organization

Both components satisfy ROHS3 compliance and AEC-Q200 automotive-grade reliability standards, ensuring equivalent performance in circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the 0ZRN0900FF1A be used as a direct replacement for the MF-RHT900-AP?

A: Yes. Both components share identical electrical parameters (16V, 9A hold current, 16.5A trip current), identical physical dimensions (0.650" x 0.118" with 0.201" lead spacing), and identical thermal operating range (-40°C to 125°C). Through-hole radial disc packaging ensures mechanical compatibility on PCB layouts designed for the MF-RHT900-AP.

Q: Are there differences in regulatory approvals between these parts?

A: The 0ZRN0900FF1A includes additional approval agency certifications (cURus, TUV, UL) compared to the MF-RHT900-AP. Both meet AEC-Q200 automotive qualification standards and ROHS3 environmental compliance requirements.

Q: What parameters must remain constant for substitution?

A: Voltage rating (16V), hold current (9A), trip current (16.5A), initial resistance (7.4 mOhms minimum), post-trip resistance (17 mOhms maximum), operating temperature range (-40°C to 125°C), and physical package dimensions must all match exactly. Any deviation in these parameters disqualifies a component as an equivalent substitute.

Q: Are there moisture sensitivity considerations?

A: The MF-RHT900-AP is rated MSL 1 (Unlimited). The 0ZRN0900FF1A is rated as Not Applicable for moisture sensitivity. Both classifications indicate no moisture-related handling restrictions for storage or assembly processes.

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

A: Yes. Both components carry AEC-Q200 ratings, which certify automotive-grade reliability and performance standards. Identical electrical and thermal specifications ensure equivalent circuit protection performance in automotive environments.

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