PFRA.700 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFRA.700 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 30V maximum voltage with a 7A hold current (Ih). This component is designed for through-hole radial mounting in disc configuration and is currently in active product status. The PFRA.700 provides automatic overcurrent protection with self-resetting capability, eliminating the need for manual fuse replacement after a trip event. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the 30V polymeric PTC resettable fuse category.

Key Parameters

Parameter	PFRA.700 Value
Voltage - Max	30V
Current - Hold (Ih) (Max)	7 A
Current - Trip (It)	14 A
Current - Max	40 A
Time to Trip	17.5 s
Resistance - Initial (Ri) (Min)	5 mOhms
Resistance - Post Trip (R1) (Max)	30 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.402" (10.20mm)
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PFRA.700 is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Max: 30V (exact match required)
Current - Hold (Ih) (Max): 7A (exact match required)
Current - Trip (It): 14A (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Disc (exact match required)
Lead Spacing: 0.402" (10.20mm) (exact match required)

Secondary Compatibility Parameters:

Operating Temperature: -40°C ~ 85°C (must meet or exceed)
Approval Agency: cURus, TUV (must maintain regulatory compliance)
RoHS Status: ROHS3 Compliant (must maintain compliance)

Parts meeting all primary criteria are classified as direct parametric equivalents. The PFRA.700 has one direct parametric equivalent and multiple related current-rating variants within the same voltage and package family.

Parameter Comparison

Parameter	PFRA.700	0ZRB0700FF1A	MF-R700
Manufacturer	SCHURTER Inc.	Bel Fuse Inc.	Bourns Inc.
Voltage - Max	30V	30V	30V
Current - Hold (Ih) (Max)	7 A	7 A	7 A
Current - Trip (It)	14 A	14 A	14 A
Current - Max	40 A	40 A	40 A
Time to Trip	17.5 s	17.5 s	17.5 s
Resistance - Initial (Ri) (Min)	5 mOhms	5 mOhms	5 mOhms
Resistance - Post Trip (R1) (Max)	30 mOhms	30 mOhms	30 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc
Size / Dimension	0.870" L x 0.118" W (22.10mm x 3.00mm)	0.752" L x 0.118" W (19.10mm x 3.00mm)	0.870" L x 0.118" W (22.10mm x 3.00mm)
Height - Seated (Max)	1.173" (29.80mm)	1.051" (26.70mm)	1.173" (29.80mm)
Lead Spacing	0.402" (10.20mm)	0.402" (10.20mm)	0.402" (10.20mm)
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

Direct Parametric Equivalents:

The 0ZRB0700FF1A (Bel Fuse Inc.) and MF-R700 (Bourns Inc.) are direct parametric equivalents to the PFRA.700. Both parts match all primary electrical and mechanical specifications, including 30V maximum voltage, 7A hold current, 14A trip current, and 0.402" lead spacing for radial through-hole mounting. All three parts maintain cURus and TUV approval agency certifications and ROHS3 compliance status, ensuring regulatory equivalence.

The MF-R700 demonstrates identical physical dimensions (0.870" L x 0.118" W, 1.173" seated height) to the PFRA.700, providing direct form-factor compatibility. The 0ZRB0700FF1A exhibits slightly reduced physical dimensions (0.752" L x 0.118" W, 1.051" seated height) while maintaining identical electrical performance and lead spacing, suitable for applications with space constraints.

Related Current-Rating Variants:

The 0ZRB0600FF1A (6A hold current) and 0ZRB0800FF1A (8A hold current) are available as alternative current ratings within the same 30V voltage class and radial disc package family. These parts share identical mounting type, lead spacing (0.402"), and regulatory compliance but differ in hold current, trip current, and time-to-trip characteristics. Selection of these variants requires confirmation that the application circuit can tolerate the specified current rating differences.

Frequently Asked Questions (FAQ)

Q: Can the 0ZRB0700FF1A be used as a direct replacement for the PFRA.700?

A: Yes. The 0ZRB0700FF1A matches all critical electrical parameters (30V, 7A Ih, 14A It, 17.5s trip time) and mechanical specifications (0.402" lead spacing, radial disc package, through-hole mounting). Both parts carry cURus and TUV certifications and maintain ROHS3 compliance. The primary difference is physical length (0.752" vs. 0.870"), which may affect PCB layout in space-constrained designs.

Q: What is the difference between the MF-R700 and PFRA.700?

A: The MF-R700 and PFRA.700 are parametric equivalents with identical electrical specifications and physical dimensions. Both are rated for 30V, 7A hold current, and feature 0.402" lead spacing in radial disc configuration. The distinction is manufacturer (Bourns vs. SCHURTER) and packaging format (Bulk vs. Bulk). Electrical performance and mechanical compatibility are equivalent.

Q: Can I substitute a lower current-rated part like the 0ZRB0600FF1A for the PFRA.700?

A: No. The 0ZRB0600FF1A is rated for 6A hold current and 12A trip current, compared to the PFRA.700's 7A hold current and 14A trip current. Using a lower-rated part in a circuit designed for 7A operation will cause premature nuisance trips and is not a valid substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The PFRA.700, 0ZRB0700FF1A, and MF-R700 all maintain ROHS3 compliance status. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected.

Q: What is the significance of lead spacing in selecting a substitute?

A: Lead spacing (0.402" or 10.20mm) determines PCB pad pitch and through-hole positioning. All direct parametric equivalents maintain identical 0.402" lead spacing, ensuring direct PCB footprint compatibility without layout modification. Variants with different current ratings (0ZRB0600FF1A, 0ZRB0800FF1A) also maintain this lead spacing, preserving mechanical interchangeability.

Q: Do all substitute parts have the same approval certifications?

A: Yes. The PFRA.700, 0ZRB0700FF1A, and MF-R700 all carry cURus and TUV approval agency certifications, meeting identical regulatory requirements for safety and performance validation.

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