PFRA.065.2 Polymeric PTC Resettable Fuse 60V 650mA Radial

Part Overview

The PFRA.065.2 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with 650mA hold current. This component is classified as Active product status and is ROHS3 compliant. The device functions as an automatic reset protection element for electronic circuits, providing overcurrent protection without requiring manual intervention after a fault condition clears. Alternative equivalent and substitute parts are necessary when the primary part is unavailable, when different current ratings are required for circuit optimization, or when alternative manufacturer sourcing is preferred for supply chain flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	PFRA.065.2
Manufacturer	SCHURTER Inc.
Voltage - Max	60V
Current - Hold (Ih) (Max)	650 mA
Current - Trip (It)	1.3 A
Current - Max	40 A
Time to Trip	5.3 s
Resistance - Initial (Ri) (Min)	270 mOhms
Resistance - Post Trip (R1) (Max)	720 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.065.2 are classified into two categories based on substitution criteria:

Parametric Equivalents (Direct Substitutes): Parts that match all critical electrical parameters including voltage rating (60V), hold current (650mA), trip current (1.3A), time to trip (5.3s), and resistance characteristics (Ri: 270mOhms, R1: 720mOhms). These parts maintain identical functional performance and can be used interchangeably in the same circuit application. Parametric equivalents include MF-R065-2 and MF-R065-AP from Bourns Inc., and 60R065XPR from Littelfuse Inc.

Current-Variant Substitutes: Parts that maintain the same voltage rating (60V), mounting type (Through Hole Radial), package configuration, and lead spacing (5.10mm), but feature different hold current ratings. These substitutes are applicable when circuit design allows for alternative current protection thresholds. Current-variant substitutes include 60R010XPR (100mA), 60R025XPR (250mA), and 60R075XPR (750mA), all from Littelfuse Inc.

The key parameters determining substitution eligibility are: maximum voltage (60V), mounting type (Through Hole), package type (Radial Disc), and lead spacing (5.10mm).

Parameter Comparison

Parameter	PFRA.065.2 (SCHURTER)	60R065XPR (Littelfuse)	60R075XPR (Littelfuse)	60R025XPR (Littelfuse)	60R010XPR (Littelfuse)	MF-R065-2 (Bourns)	MF-R065-AP (Bourns)
Voltage - Max	60V	60V	60V	60V	60V	60V	60V
Current - Hold (Ih) (Max)	650 mA	650 mA	750 mA	250 mA	100 mA	650 mA	650 mA
Current - Trip (It)	1.3 A	1.3 A	1.5 A	500 mA	200 mA	1.3 A	1.3 A
Current - Max	40 A	40 A	40 A	40 A	40 A	40 A	40 A
Time to Trip	5.3 s	5.3 s	6.3 s	2.5 s	4 s	5.3 s	5.3 s
Resistance - Initial (Ri) (Min)	270 mOhms	310 mOhms	250 mOhms	1.25 Ohms	2.5 Ohms	270 mOhms	270 mOhms
Resistance - Post Trip (R1) (Max)	720 mOhms	720 mOhms	600 mOhms	3 Ohms	7.5 Ohms	720 mOhms	720 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-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	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	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)	0.201" (5.10mm)	0.201" (5.10mm)
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV	cURus, TUV	cURus	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

MF-R065-2 and MF-R065-AP from Bourns Inc. are parametric equivalents to PFRA.065.2. Both parts maintain identical voltage, hold current, trip current, time to trip, and resistance specifications. Both are ROHS3 compliant with cURus and TUV approvals. Selection between these Bourns alternatives depends on packaging variant availability and supply chain requirements.

60R065XPR from Littelfuse Inc. is also a parametric equivalent with matching electrical specifications. This part carries cURus and TUV approvals and ROHS3 compliance. The primary difference is a slightly higher initial resistance (310mOhms vs. 270mOhms), which remains within acceptable tolerance for most applications.

For Current-Variant Applications:

60R075XPR (750mA hold current) is suitable when slightly higher current protection threshold is acceptable. This part maintains all other critical parameters including voltage, mounting, and package configuration.

60R025XPR (250mA hold current) is suitable for applications requiring lower current protection threshold with faster trip response (2.5s vs. 5.3s).

60R010XPR (100mA hold current) is suitable for low-current circuit protection applications requiring the fastest trip response (4s).

All substitute parts maintain Active product status, ROHS3 compliance, and appropriate regulatory approvals for their respective current ratings.

Frequently Asked Questions (FAQ)

Q: Can I use 60R065XPR as a direct replacement for PFRA.065.2?

A: Yes. The 60R065XPR from Littelfuse Inc. is a parametric equivalent with matching 60V voltage rating, 650mA hold current, 1.3A trip current, and 5.3s trip time. Both parts are ROHS3 compliant with cURus and TUV approvals. The initial resistance specification differs slightly (310mOhms vs. 270mOhms), but this remains within acceptable operating parameters for equivalent functionality.

Q: What is the difference between parametric equivalents and current-variant substitutes?

A: Parametric equivalents (MF-R065-2, MF-R065-AP, 60R065XPR) maintain identical electrical performance including hold current, trip current, and trip time. Current-variant substitutes (60R010XPR, 60R025XPR, 60R075XPR) maintain the same voltage rating and package configuration but feature different hold current ratings, resulting in different protection thresholds and trip response times.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All substitute parts maintain identical lead spacing (0.201" / 5.10mm) and Through Hole Radial mounting type. However, physical diameter dimensions vary slightly between parts. PFRA.065.2 has a 0.382" diameter, while 60R065XPR has a 0.370" diameter, and 60R075XPR has a 0.402" diameter. Verify PCB pad spacing and component clearance before substitution.

Q: Which substitute parts have TUV approval?

A: PFRA.065.2, 60R065XPR, 60R075XPR, MF-R065-2, and MF-R065-AP all carry TUV approval. 60R010XPR and 60R025XPR carry cURus approval only.

Q: Can I use a lower current-rated part like 60R025XPR in place of PFRA.065.2?

A: Only if circuit design allows for lower current protection threshold. The 60R025XPR has a 250mA hold current versus 650mA for PFRA.065.2, resulting in earlier fault detection and faster trip response (2.5s vs. 5.3s). This substitution is valid only when the lower protection threshold meets application requirements.

Q: What is the inventory status of substitute parts?

A: 60R065XPR: 4200 pcs, 60R075XPR: 6866 pcs, 60R025XPR: 3954 pcs, 60R010XPR: 3400 pcs, MF-R065-2: 3420 pcs, MF-R065-AP: 2071 pcs. PFRA.065.2 inventory: 1013 pcs.

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