PFRA.020 Polymeric PTC Resettable Fuse 60V 200mA Radial

Part Overview

The PFRA.020 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with a 200mA hold current (Ih). This through-hole radial disc component provides overcurrent protection with automatic reset capability after fault clearance. The part is active in production status and carries ROHS3 compliance with cURus and TUV approvals. Equivalent and substitute parts are identified based on matching voltage rating, current specifications, mechanical form factor, and thermal operating range to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	PFRA.020
Manufacturer	SCHURTER Inc.
Voltage - Max	60V
Current - Hold (Ih) (Max)	200 mA
Current - Trip (It)	400 mA
Mounting Type	Through Hole
Package / Case	Radial, Disc
Size / Dimension	0.291" Dia x 0.122" T (7.40mm x 3.10mm)
Lead Spacing	0.201" (5.10mm)
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitution eligibility for the PFRA.020 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain 60V maximum voltage specification to ensure equivalent protection in the same circuit environment.

Current - Hold (Ih): The 200mA hold current is the primary current specification. Substitute parts with identical 200mA Ih rating provide direct functional replacement without circuit redesign.

Current - Trip (It): The 400mA trip threshold must match to maintain consistent fault response characteristics.

Mounting Type and Package: Through-hole radial disc configuration with 0.201" (5.10mm) lead spacing ensures mechanical compatibility with existing PCB layouts.

Operating Temperature Range: The -40°C to 85°C range must be maintained for thermal compatibility.

Mechanical Dimensions: Radial disc form factor with 0.291" diameter and 0.122" thickness ensures physical fit in component footprints.

Compliance: ROHS3 compliance and regulatory approvals (cURus, TUV) must be present for applications requiring certified components.

Parameter Comparison

Parameter	PFRA.020 (SCHURTER)	60R020XPR (Littelfuse)	MF-R020 (Bourns)	60R010XPR (Littelfuse)	60R017XPR (Littelfuse)	60R025XPR (Littelfuse)	60R030XPR (Littelfuse)	60R040XPR (Littelfuse)
Voltage - Max	60V	60V	60V	60V	60V	60V	60V	60V
Current - Hold (Ih) (Max)	200 mA	200 mA	200 mA	100 mA	170 mA	250 mA	300 mA	400 mA
Current - Trip (It)	400 mA	400 mA	400 mA	200 mA	340 mA	500 mA	600 mA	800 mA
Time to Trip	2.2 s	2.2 s	2.2 s	4 s	3 s	2.5 s	3 s	3.8 s
Resistance - Initial (Ri) (Min)	1.5 Ohms	1.83 Ohms	1.5 Ohms	2.5 Ohms	3.3 Ohms	1.25 Ohms	880 mOhms	550 mOhms
Resistance - Post Trip (R1) (Max)	4.4 Ohms	4.4 Ohms	4.4 Ohms	7.5 Ohms	8 Ohms	3 Ohms	2.1 Ohms	1.29 Ohms
Mounting Type	Through Hole	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	Radial, Disc
Size / Dimension	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.291" Dia x 0.122" T (7.40mm x 3.10mm)	0.299" Dia x 0.122" T (7.60mm x 3.10mm)
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)	0.201" (5.10mm)
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	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV	cURus	cURus	cURus, TUV	cURus, TUV	cURus, TUV

Engineering Selection Recommendations

Direct Equivalents (200mA Hold Current):

The 60R020XPR (Littelfuse Inc.) and MF-R020 (Bourns Inc.) are parametric equivalents to the PFRA.020. Both parts maintain identical voltage rating (60V), hold current (200mA), trip current (400mA), and time-to-trip specification (2.2s). All three parts carry cURus and TUV approvals and are ROHS3 compliant. The 60R020XPR is available in Cut Tape packaging with 3213 units in stock, while MF-R020 is available in Bulk packaging with 10429 units in stock. These parts provide direct functional replacement without circuit modification.

Current-Rated Alternatives (Different Hold Current):

Parts with different hold current ratings (60R010XPR at 100mA, 60R017XPR at 170mA, 60R025XPR at 250mA, 60R030XPR at 300mA, 60R040XPR at 400mA) maintain the 60V voltage rating and through-hole radial disc form factor but provide different overcurrent protection thresholds. These alternatives are suitable only when circuit design permits different trip current specifications. All alternatives carry ROHS3 compliance and cURus approval; TUV approval is present on 60R025XPR, 60R030XPR, and 60R040XPR.

Packaging Considerations:

The PFRA.020 is supplied in Bulk packaging. Littelfuse 60R series parts are available in both Cut Tape (CT) and Bulk packaging options. Bourns MF-R020 is supplied in Bulk packaging. Selection between packaging types depends on assembly process requirements and order quantity.

Frequently Asked Questions (FAQ)

Q: Can 60R020XPR directly replace PFRA.020 in existing designs?

A: Yes. The 60R020XPR maintains identical electrical specifications: 60V voltage rating, 200mA hold current, 400mA trip current, and 2.2s time-to-trip. Mechanical dimensions, lead spacing, and operating temperature range are identical. Both parts carry cURus and TUV approvals and are ROHS3 compliant.

Q: What is the difference between 60R020XPR and MF-R020?

A: Both are parametric equivalents to PFRA.020 with identical electrical performance. The primary difference is manufacturer: 60R020XPR is Littelfuse Inc. (POLY-FUSE® series) and MF-R020 is Bourns Inc. (Multifuse® series). Packaging differs: 60R020XPR is available in Cut Tape, while MF-R020 is supplied in Bulk.

Q: Can I use 60R025XPR (250mA) instead of PFRA.020 (200mA)?

A: Only if circuit design permits a higher trip current threshold. The 60R025XPR will not trip at 200mA; it requires 500mA to trip compared to 400mA for PFRA.020. This changes the overcurrent protection characteristic and may not be suitable for all applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance. TUV approval is present on 60R020XPR, 60R025XPR, 60R030XPR, and 60R040XPR. The 60R010XPR and 60R017XPR carry cURus approval only.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape (CT) packaging is used for automated assembly processes and provides components on carrier tape. Bulk packaging supplies loose components suitable for manual assembly or alternative handling methods. Electrical and mechanical specifications are identical between packaging types.

Q: Does lead spacing differ between substitute parts?

A: Lead spacing is 0.201" (5.10mm) for all parts except 60R040XPR, which maintains the same spacing. Mechanical diameter varies slightly: PFRA.020, 60R020XPR, 60R010XPR, 60R017XPR, 60R025XPR, and 60R030XPR are 0.291" diameter; 60R040XPR is 0.299" diameter. This minor difference does not affect PCB footprint compatibility for standard through-hole radial disc layouts.

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