Bourns MF-R250-0-10-99 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The Bourns MF-R250-0-10-99 is a polymeric PTC resettable fuse rated for 30V maximum voltage and 2.5A hold current, designed for through-hole radial mounting in disc configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part belongs to the Multifuse® MF-R series and meets ROHS3 compliance with cURus and TUV approvals.

Key Parameters

Parameter	Value
Voltage - Max	30V
Current - Hold (Ih) (Max)	2.5 A
Current - Trip (It)	5 A
Current - Max	40 A
Time to Trip	10.3 s
Resistance - Initial (Ri) (Min)	25 mOhms
Resistance - Post Trip (R1) (Max)	70 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Size / Dimension	0.472" L x 0.118" W (12.00mm x 3.00mm)
Height - Seated (Max)	0.720" (18.30mm)
Lead Spacing	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MF-R250-0-10-99 are qualified based on the following electrical and mechanical parameters:

Electrical Parameters (Must Match):

Voltage - Max: 30V
Current - Hold (Ih) (Max): 2.5 A
Current - Trip (It): 5 A
Current - Max: 40 A
Time to Trip: 10.3 s
Resistance - Initial (Ri) (Min): 25 mOhms
Resistance - Post Trip (R1) (Max): 70 mOhms
Operating Temperature: -40°C ~ 85°C

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: Radial, Disc
Size / Dimension: 0.472" L x 0.118" W (12.00mm x 3.00mm)
Height - Seated (Max): 0.720" (18.30mm)
Lead Spacing: 0.201" (5.10mm)

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical performance and physical form factor, ensuring direct functional replacement in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Approval Agency
MF-R250-0-10-99	Bourns Inc.	Obsolete	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cURus, TUV
MF-R250	Bourns Inc.	Active	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cURus, TUV
MF-R250-0-10	Bourns Inc.	Active	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cURus, TUV
MF-R250-0-14	Bourns Inc.	Active	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cUL, cURus, TUV, UL
MF-R250U	Bourns Inc.	Active	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cURus, TUV
PFRA.250	SCHURTER Inc.	Active	30V	2.5 A	5 A	25 mOhms	70 mOhms	-40°C ~ 85°C	Through Hole	Radial, Disc	ROHS3 Compliant	cURus, TUV

Engineering Selection Recommendations

Primary Substitutes (Bourns Inc., Active Status):

The Bourns MF-R250, MF-R250-0-10, and MF-R250U are direct functional equivalents with active product status. These parts maintain identical electrical and mechanical specifications to the obsolete MF-R250-0-10-99. Selection among these three Bourns variants depends on packaging requirements and inventory availability.

Enhanced Compliance Option (Bourns Inc., Active Status):

The MF-R250-0-14 offers expanded approval agency certifications including cUL and UL in addition to cURus and TUV. This variant is suitable for applications requiring broader regulatory compliance documentation while maintaining identical electrical performance and physical form factor.

Cross-Manufacturer Alternative (SCHURTER Inc., Active Status):

The PFRA.250 from SCHURTER Inc. provides an active cross-manufacturer substitute with equivalent electrical and mechanical parameters. This option is applicable when Bourns supply is constrained or when design flexibility permits manufacturer diversification.

Frequently Asked Questions (FAQ)

Q: Can MF-R250-0-10-99 be directly replaced with MF-R250?

A: Yes. Both parts share identical electrical parameters (30V, 2.5A hold current, 5A trip current, 10.3s trip time), resistance specifications, operating temperature range, and physical dimensions including lead spacing and mounting configuration. The primary difference is product status: MF-R250-0-10-99 is obsolete while MF-R250 is active.

Q: What is the difference between MF-R250-0-10 and MF-R250-0-14?

A: Electrical and mechanical specifications are identical. The distinction lies in approval agencies: MF-R250-0-14 carries cUL and UL certifications in addition to cURus and TUV, providing broader regulatory coverage for applications requiring expanded compliance documentation.

Q: Is PFRA.250 from SCHURTER a suitable replacement for the Bourns MF-R250-0-10-99?

A: Yes. The PFRA.250 maintains all critical electrical parameters (30V, 2.5A hold current, 5A trip current, 10.3s trip time), resistance values, operating temperature range, and physical form factor. Both parts are ROHS3 compliant and carry cURus and TUV approvals. Cross-manufacturer substitution is valid when specifications align completely.

Q: Does packaging type affect substitution eligibility?

A: Packaging type (bulk versus other configurations) does not affect electrical or mechanical compatibility. All listed substitutes are qualified for through-hole radial disc mounting with identical lead spacing of 0.201" (5.10mm) and seated height of 0.720" (18.30mm).

Q: Are there any temperature or compliance restrictions when using substitute parts?

A: All substitute parts operate across the identical temperature range of -40°C to 85°C and maintain ROHS3 compliance. Moisture sensitivity level is 1 (Unlimited) for all Bourns variants and not applicable for the SCHURTER PFRA.250, presenting no additional handling or storage constraints.

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