PFRA.010.3 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFRA.010.3 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with 100 mA hold current. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The PFRA.010.3 functions as a thermal protection device in through-hole radial configuration, suitable for applications requiring automatic current limiting and circuit protection.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	100 mA
Current - Trip (It)	200 mA
Current - Max	40 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	2.5 Ohms
Resistance - Post Trip (R1) (Max)	7.5 Ohms
Operating Temperature	-40°C ~ 85°C
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)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PFRA.010.3 is determined by strict equivalence across the following critical parameters:

Voltage rating: 60V maximum
Hold current: 100 mA maximum
Trip current: 200 mA
Time to trip: 4 seconds
Initial resistance: 2.5 Ohms minimum
Post-trip resistance: 7.5 Ohms maximum
Operating temperature range: -40°C to 85°C
Mounting configuration: Through hole radial disc
Physical dimensions and lead spacing compatibility

All substitute parts listed maintain identical electrical characteristics and mechanical form factors, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Parameter	PFRA.010.3 (Main)	PFRA.010.2	RXEF010-AP	60R010XPR	MF-R010-AP	MF-R010-AP-17
Manufacturer	SCHURTER Inc.	SCHURTER Inc.	Littelfuse	Littelfuse Inc.	Bourns Inc.	Bourns Inc.
Voltage - Max	60V	60V	60V	60V	60V	60V
Current - Hold (Ih) (Max)	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA
Current - Trip (It)	200 mA	200 mA	200 mA	200 mA	200 mA	200 mA
Current - Max	40 A	40 A	40 A	40 A	40 A	40 A
Time to Trip	4 s	4 s	4 s	4 s	4 s	4 s
Resistance - Initial (Ri) (Min)	2.5 Ohms	2.5 Ohms	2.5 Ohms	2.5 Ohms	2.5 Ohms	2.5 Ohms
Resistance - Post Trip (R1) (Max)	7.5 Ohms	7.5 Ohms	7.5 Ohms	7.5 Ohms	7.5 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	-40°C ~ 85°C
Mounting Type	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
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 0.118" T (7.40mm x 3.00mm)	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)
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)	0.199" (5.05mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and supply chain continuity. Selection among PFRA.010.2, RXEF010-AP, 60R010XPR, MF-R010-AP, and MF-R010-AP-17 should be based on packaging requirements and certification scope:

PFRA.010.2 remains within the SCHURTER Inc. product family and carries CSA and TUV certifications. This option provides continuity with the original manufacturer while transitioning from obsolete to active status.

RXEF010-AP (Littelfuse PolySwitch® series) offers the broadest certification coverage including CQC, CSA, TUV, and UL approvals. Minor dimensional variation in thickness (0.118" vs. 0.122") and lead spacing (0.199" vs. 0.201") remains within mechanical tolerance for standard through-hole PCB applications.

60R010XPR (Littelfuse POLY-FUSE® series) provides identical mechanical dimensions to the main part and carries cURus certification with highest inventory availability (3400 units).

MF-R010-AP (Bourns Multifuse® series) matches all mechanical specifications and holds cURus and TUV certifications with substantial inventory (6721 units).

MF-R010-AP-17 (Bourns Multifuse® series) includes automotive-grade AEC-Q200 rating and expanded certification scope (cUL, cURus, TUV, UL), suitable for applications requiring automotive qualification standards.

Frequently Asked Questions (FAQ)

Q: Can RXEF010-AP be used as a direct replacement despite minor dimensional differences?

A: Yes. The RXEF010-AP thickness of 0.118" (versus 0.122" for PFRA.010.3) and lead spacing of 0.199" (versus 0.201") fall within standard PCB through-hole tolerances and do not affect electrical performance or mechanical fit in standard applications.

Q: What is the difference between packaging options (Cut Tape vs. Tape & Box)?

A: Cut Tape (CT) packaging provides individual component strips suitable for automated assembly and smaller order quantities. Tape & Box (TB) packaging, as used for MF-R010-AP-17, provides components in tape format within protective boxes, typically for larger volume orders. Both formats contain identical components with identical electrical specifications.

Q: Which substitute part offers the best certification coverage?

A: MF-R010-AP-17 provides the most comprehensive certification scope with cUL, cURus, TUV, and UL approvals, plus AEC-Q200 automotive qualification. This part is recommended for applications requiring maximum regulatory compliance or automotive-grade reliability standards.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental compliance status of the original PFRA.010.3.

Q: What inventory levels are available for each substitute?

A: PFRA.010.2 (879 units), RXEF010-AP (720 units), 60R010XPR (3400 units), MF-R010-AP (6721 units), and MF-R010-AP-17 (1027 units) are currently in stock as new original components.

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