MF-NSML260-2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MF-NSML260-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 6V at 2.6A hold current in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement. The part belongs to the Multifuse® MF-NSML series and carries full cURus and TUV approvals with ROHS3 compliance.

Key Parameters

Parameter	Value
Manufacturer	Bourns Inc.
Series	Multifuse® MF-NSML
Voltage - Max	6V
Current - Hold (Ih) (Max)	2.6 A
Current - Trip (It)	5.2 A
Current - Max	50 A
Package / Case	1206 (3216 Metric), Concave
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MF-NSML260-2 is determined by the following critical parameters:

Voltage rating: 6V maximum
Current hold (Ih): 2.6A maximum
Current trip (It): 5.2A
Package type: 1206 (3216 Metric) surface mount
Mounting configuration: Surface mount
Operating temperature range: -40°C to 85°C
Regulatory compliance: cURus and TUV approvals

The substitute part MF-NSML260/6-2 maintains identical voltage, hold current, trip current, package dimensions, and operating temperature specifications. Both parts are manufactured by Bourns Inc. within the same Multifuse® series, ensuring functional and mechanical compatibility. The primary distinction is product status: MF-NSML260/6-2 is active production, whereas MF-NSML260-2 is obsolete.

Parameter Comparison

Parameter	MF-NSML260-2 (Main)	MF-NSML260/6-2 (Substitute)
Manufacturer	Bourns Inc.	Bourns Inc.
Series	Multifuse® MF-NSML	Multifuse® MF-NSML/X
Voltage - Max	6V	6V
Current - Hold (Ih) (Max)	2.6 A	2.6 A
Current - Trip (It)	5.2 A	5.2 A
Current - Max	50 A	50 A
Time to Trip	4 s	5 s
Resistance - Initial (Ri) (Min)	3 mOhms	4 mOhms
Resistance - Post Trip (R1) (Max)	26 mOhms	30 mOhms
Package / Case	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave
Size / Dimension	0.128" L x 0.063" W (3.25mm x 1.60mm)	0.128" L x 0.063" W (3.25mm x 1.60mm)
Thickness (Max)	0.024" (0.60mm)	0.039" (1.00mm)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Approval Agency	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active
Packaging	-	Tape & Reel (TR)

Engineering Selection Recommendations

The MF-NSML260/6-2 is the direct substitute for the obsolete MF-NSML260-2. Both parts carry identical regulatory approvals (cURus, TUV) and ROHS3 compliance status. The substitute maintains all critical electrical parameters: 6V voltage rating, 2.6A hold current, 5.2A trip current, and identical package dimensions for 1206 surface mount applications.

Minor variations exist in time to trip (4s versus 5s), initial resistance (3 mOhms versus 4 mOhms), and post-trip resistance (26 mOhms versus 30 mOhms). These differences fall within normal manufacturing tolerances for polymeric PTC resettable fuses and do not affect functional compatibility in standard circuit protection applications. The substitute part is available in active production with Tape & Reel packaging, ensuring reliable procurement.

Frequently Asked Questions (FAQ)

Q: Can MF-NSML260/6-2 be used as a direct replacement for MF-NSML260-2?

A: Yes. Both parts share identical voltage ratings (6V), hold current (2.6A), trip current (5.2A), package type (1206 surface mount), and operating temperature range (-40°C to 85°C). Regulatory approvals and RoHS compliance are equivalent.

Q: What are the differences between these two parts?

A: The primary difference is product status: MF-NSML260-2 is obsolete while MF-NSML260/6-2 is in active production. Secondary differences include time to trip (4s vs. 5s), initial resistance (3 mOhms vs. 4 mOhms), post-trip resistance (26 mOhms vs. 30 mOhms), and physical thickness (0.60mm vs. 1.00mm). These variations are within normal tolerances for this component category.

Q: Are there packaging differences?

A: Yes. MF-NSML260-2 packaging is unspecified in available data, while MF-NSML260/6-2 is supplied in Tape & Reel (TR) format. Both parts use identical 1206 (3216 Metric) surface mount packages with concave geometry.

Q: Do both parts have the same regulatory approvals?

A: Yes. Both MF-NSML260-2 and MF-NSML260/6-2 carry cURus and TUV approvals and are ROHS3 compliant. Moisture sensitivity level is 2A (4 Weeks) for both parts.

Q: What is the operating temperature range for these parts?

A: Both parts operate across -40°C to 85°C, suitable for industrial and commercial applications.

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