PFRA.090.2 Polymeric PTC Resettable Fuse 60V 900mA Radial Equivalent & Substitute Parts

Part Overview

The PFRA.090.2 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with 900mA hold current. This through-hole radial disc component is designed for overcurrent protection in electronic circuits and is currently in active product status with 1057 units in stock. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring polymeric PTC resettable fuse protection at comparable electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	900 mA
Current - Trip (It)	1.8 A
Current - Max	40 A
Time to Trip	7.2 s
Resistance - Initial (Ri) (Min)	140 mOhms
Resistance - Post Trip (R1) (Max)	470 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the PFRA.090.2 are classified into two categories based on electrical parameter alignment:

Direct Electrical Equivalents (60R090XPR): Parts matching the primary electrical specifications of 60V maximum voltage, 900mA hold current, 1.8A trip current, and 7.2 second trip time. These substitutes maintain identical functional performance characteristics and are interchangeable for the same circuit protection application.

Parametric Equivalent (MF-RX090/72-2): Parts with matching hold current (900mA), trip current (1.8A), trip time (7.2s), and initial resistance (140mOhms), but with higher maximum voltage rating (72V). This part operates within the same thermal and current envelope and is suitable for applications where the 60V rating is not a limiting constraint.

Current Rating Variants (60R010XPR, 60R025XPR): Parts within the same 60V voltage class and radial disc package but with different hold current ratings (100mA and 250mA respectively). These are not direct substitutes but represent alternative current protection levels within the same product family.

Substitution eligibility is determined by: maximum voltage rating, hold current (Ih), trip current (It), operating temperature range, mounting type, package configuration, and lead spacing.

Parameter Comparison

Parameter	PFRA.090.2 (SCHURTER)	60R090XPR (Littelfuse)	MF-RX090/72-2 (Bourns)	60R025XPR (Littelfuse)	60R010XPR (Littelfuse)
Manufacturer	SCHURTER Inc.	Littelfuse Inc.	Bourns Inc.	Littelfuse Inc.	Littelfuse Inc.
Voltage - Max	60V	60V	72V	60V	60V
Current - Hold (Ih) (Max)	900 mA	900 mA	900 mA	250 mA	100 mA
Current - Trip (It)	1.8 A	1.8 A	1.8 A	500 mA	200 mA
Current - Max	40 A	40 A	40 A	40 A	40 A
Time to Trip	7.2 s	7.2 s	7.2 s	2.5 s	4 s
Resistance - Initial (Ri) (Min)	140 mOhms	200 mOhms	140 mOhms	1.25 Ohms	2.5 Ohms
Resistance - Post Trip (R1) (Max)	470 mOhms	470 mOhms	470 mOhms	3 Ohms	7.5 Ohms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV	cURus, TUV	cURus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

60R090XPR (Littelfuse): This part is the primary direct electrical equivalent for the PFRA.090.2. It maintains identical voltage, hold current, trip current, and trip time specifications with ROHS3 compliance and dual agency approval (cURus, TUV). The 60R090XPR is suitable for direct substitution in applications requiring 900mA hold current protection at 60V. Inventory availability is 8094 units.

MF-RX090/72-2 (Bourns): This part is a parametric equivalent with matching hold current, trip current, and trip time but with a higher 72V maximum voltage rating. It maintains identical initial resistance (140mOhms) and post-trip resistance (470mOhms) specifications. The MF-RX090/72-2 is suitable for applications where the circuit operates below 60V or where higher voltage margin is beneficial. Dual agency approval (cURus, TUV) and ROHS3 compliance are confirmed. Inventory availability is 11201 units.

60R025XPR and 60R010XPR (Littelfuse): These parts are current rating variants within the 60V, 60R series family. They are not direct substitutes for the 900mA hold current requirement but represent alternative protection levels (250mA and 100mA respectively) for lower-current applications. Selection of these parts requires circuit redesign confirmation.

All substitute parts maintain through-hole radial disc package configuration with 0.201" (5.10mm) lead spacing, ensuring mechanical compatibility with the original PFRA.090.2 footprint.

Frequently Asked Questions (FAQ)

Q: Can the 60R090XPR directly replace the PFRA.090.2 in my circuit?

A: Yes. The 60R090XPR matches all critical electrical parameters: 60V maximum voltage, 900mA hold current, 1.8A trip current, 7.2 second trip time, and identical operating temperature range. Both parts are ROHS3 compliant with cURus and TUV approval. The radial disc package and 0.201" lead spacing are identical, confirming mechanical compatibility.

Q: What is the difference between the PFRA.090.2 and the MF-RX090/72-2?

A: The primary difference is maximum voltage rating: PFRA.090.2 is rated 60V while MF-RX090/72-2 is rated 72V. Both parts share identical hold current (900mA), trip current (1.8A), trip time (7.2s), and initial resistance (140mOhms). The MF-RX090/72-2 provides higher voltage margin and is suitable for applications operating below 60V where additional voltage headroom is desired.

Q: Why do the 60R010XPR and 60R025XPR appear in the substitute list if they have different current ratings?

A: These parts are listed as current rating variants within the same 60V, 60R product family and radial disc package. They are not direct substitutes for the 900mA hold current application but represent alternative protection levels. Selection of these parts requires confirmation that the lower current rating (100mA or 250mA) is appropriate for the target circuit.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The PFRA.090.2, 60R090XPR, MF-RX090/72-2, and 60R025XPR are all ROHS3 compliant. The 60R010XPR is also ROHS3 compliant. All parts meet environmental compliance requirements.

Q: What certifications do the substitute parts carry?

A: The 60R090XPR and MF-RX090/72-2 carry dual agency approval (cURus and TUV), matching the PFRA.090.2 certification level. The 60R025XPR also carries cURus and TUV approval. The 60R010XPR carries cURus approval. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can I use the MF-RX090/72-2 in a 60V circuit designed for the PFRA.090.2?

A: Yes. The MF-RX090/72-2 is rated for 72V maximum voltage, which exceeds the 60V circuit requirement. The matching hold current (900mA), trip current (1.8A), and trip time (7.2s) ensure identical circuit protection behavior. The higher voltage rating does not affect performance in a 60V application.

Q: What is the lead spacing for all these parts?

A: All listed parts maintain 0.201" (5.10mm) lead spacing, confirming mechanical compatibility with PCB footprints designed for the PFRA.090.2 radial disc package.

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