MF-USML700-2 PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MF-USML700-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V at 7A hold current in a 1210 (3225 Metric) surface mount package. This component is classified as Obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 85°C and meets cURus and TUV approval standards.

Key Parameters

Parameter	Value
Voltage - Max	6V
Current - Hold (Ih) (Max)	7 A
Current - Trip (It)	14 A
Current - Max	50 A
Time to Trip	2 s
Resistance - Initial (Ri) (Min)	1 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	1210 (3225 Metric), Concave
Type	Polymeric
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MF-USML700-2 is determined by strict equivalence across the following critical parameters:

Voltage rating: 6V maximum
Current hold (Ih): 7A maximum
Current trip (It): 14A
Package type: 1210 (3225 Metric), Concave surface mount
Polymeric PTC fuse technology
Operating temperature range: -40°C to 85°C
Regulatory compliance: cURus and TUV approval

The MF-USML700/6-2 meets all substitution criteria as a direct equivalent, with identical electrical ratings and package specifications. The primary distinction is product status and packaging format.

Parameter Comparison

Parameter	MF-USML700-2	MF-USML700/6-2
Manufacturer	Bourns Inc.	Bourns Inc.
Series	Multifuse®, MF-USML	Multifuse®, MF-USML/X
Product Status	Obsolete	Active
Type	Polymeric	Polymeric
Voltage - Max	6V	6V
Current - Hold (Ih) (Max)	7 A	7 A
Current - Trip (It)	14 A	14 A
Current - Max	50 A	50 A
Time to Trip	2 s	2 s
Resistance - Initial (Ri) (Min)	1 mOhms	1 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	1210 (3225 Metric), Concave	1210 (3225 Metric), Concave
Approval Agency	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	2A (4 Weeks)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The MF-USML700/6-2 is the direct substitute for the obsolete MF-USML700-2. Both components carry identical electrical specifications, thermal operating ranges, and regulatory certifications (cURus, TUV). The MF-USML700/6-2 maintains Active product status with higher inventory availability, making it the appropriate selection for new designs and production continuity. Both parts satisfy ROHS3 compliance requirements and carry equivalent moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can the MF-USML700/6-2 be used as a direct replacement for the MF-USML700-2?

A: Yes. Both components share identical voltage ratings (6V), current hold specifications (7A), current trip values (14A), package geometry (1210 Concave), and operating temperature ranges (-40°C to 85°C). Electrical performance and thermal characteristics are equivalent.

Q: What is the primary difference between these two part numbers?

A: The MF-USML700-2 is classified as Obsolete, while the MF-USML700/6-2 maintains Active status. The MF-USML700/6-2 is supplied in Tape & Reel packaging format and represents the current production equivalent.

Q: Are there any package or mounting differences?

A: Both parts use identical 1210 (3225 Metric) Concave surface mount packages. PCB footprints and reflow soldering profiles are compatible.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the MF-USML700-2 and MF-USML700/6-2 carry cURus and TUV approvals, ROHS3 compliance, and REACH Unaffected status.

Q: What is the moisture sensitivity level for these components?

A: Both parts are rated MSL 2A with a 4-week floor life after moisture barrier bag opening.

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