Equivalent & Substitute Parts for 1206L150PR

Part Overview

The 1206L150PR is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 8V maximum voltage with 1.5A hold current. This component is classified as obsolete, necessitating identification of active alternative parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Voltage - Max	8V
Current - Hold (Ih) (Max)	1.5 A
Current - Trip (It)	3 A
Current - Max	100 A
Time to Trip	300 ms
Resistance - Initial (Ri) (Min)	40 mOhms
Resistance - Post Trip (R1) (Max)	120 mOhms
Operating Temperature	-40°C ~ 85°C
Package / Case	1206 (3216 Metric), Concave
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 1206L150PR is determined by the following critical parameters:

Voltage Rating: Maximum voltage must be ≥ 8V to ensure safe operation within the original circuit design envelope
Current - Hold (Ih): Must be ≤ 1.5A to maintain the same trip threshold behavior
Current - Trip (It): Must equal 3A for consistent fault protection response
Package / Case: Must be 1206 (3216 Metric), Concave for mechanical and footprint compatibility
Mounting Type: Surface Mount configuration required
Operating Temperature Range: Must encompass -40°C ~ 85°C
RoHS Compliance: ROHS3 Compliant status required for regulatory alignment

The substitute parts identified below meet these core substitution criteria with variations in voltage rating, initial resistance, and post-trip resistance within acceptable engineering tolerances.

Parameter Comparison

Parameter	1206L150PR	1206L150THWR	NANOSMDC150F-2	MF-NSMF150-2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Bourns Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Max	8V	8V	6V	6V
Current - Hold (Ih) (Max)	1.5 A	1.5 A	1.5 A	1.5 A
Current - Trip (It)	3 A	3 A	3 A	3 A
Current - Max	100 A	100 A	100 A	100 A
Time to Trip	300 ms	300 ms	300 ms	300 ms
Resistance - Initial (Ri) (Min)	40 mOhms	40 mOhms	40 mOhms	30 mOhms
Resistance - Post Trip (R1) (Max)	120 mOhms	120 mOhms	110 mOhms	130 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave	1206 (3216 Metric), Concave
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	cURus, TUV	CSA, TUV, UL	cURus, TUV

Engineering Selection Recommendations

1206L150THWR (Littelfuse Inc., Active)

This part is the direct functional equivalent of the 1206L150PR, maintaining identical electrical specifications including 8V maximum voltage rating and 1.5A hold current. Both parts share the POLY-FUSE® 1206L series designation. The 1206L150THWR is actively manufactured and available in Tape & Reel packaging, providing production continuity with no electrical parameter deviations. This is the primary recommended substitute.

NANOSMDC150F-2 (Littelfuse Inc., Active)

This PolySwitch® nanoSMD series part maintains the 1.5A hold current and 3A trip current specifications. The maximum voltage rating is 6V, which is lower than the original 8V specification. This part is suitable only for applications where the circuit voltage does not exceed 6V. The nanoSMD series offers improved thermal performance with reduced thickness (0.89mm vs. 1.40mm). Available in Cut Tape & Digi-Reel® packaging with expanded approval certifications (CSA, TUV, UL).

MF-NSMF150-2 (Bourns Inc., Active)

This Multifuse® MF-NSMF series part maintains the 1.5A hold current and 3A trip current specifications with a 6V maximum voltage rating. The initial resistance is lower at 30 mOhms minimum, and post-trip resistance is higher at 130 mOhms maximum. This part carries AEC-Q200 automotive qualification and is suitable for applications where the circuit voltage does not exceed 6V. Available in Cut Tape & Digi-Reel® packaging.

Frequently Asked Questions (FAQ)

Q: Can I use NANOSMDC150F-2 or MF-NSMF150-2 as direct replacements for 1206L150PR?

A: These parts are compatible only if your circuit operates at 6V or below. Both substitute parts have a maximum voltage rating of 6V, compared to the original 8V rating. If your application requires 8V operation, use 1206L150THWR instead.

Q: What is the difference between the three substitute parts?

A: 1206L150THWR is a Littelfuse POLY-FUSE® part with 8V rating, matching the original specifications exactly. NANOSMDC150F-2 is a Littelfuse PolySwitch® nanoSMD part with 6V rating and thinner profile. MF-NSMF150-2 is a Bourns Multifuse® part with 6V rating and AEC-Q200 automotive qualification.

Q: Are all substitute parts available in the same packaging?

A: No. The 1206L150THWR is supplied in Tape & Reel (TR) packaging. Both NANOSMDC150F-2 and MF-NSMF150-2 are supplied in Cut Tape (CT) & Digi-Reel® packaging. Verify packaging compatibility with your procurement and assembly processes.

Q: Do all parts meet RoHS compliance?

A: Yes. All parts listed are ROHS3 Compliant. The 1206L150THWR, NANOSMDC150F-2, and MF-NSMF150-2 all carry REACH Unaffected status where applicable.

Q: What are the key electrical parameters I should verify before substitution?

A: Verify that your circuit voltage does not exceed the maximum voltage rating of the substitute part. Confirm that the 1.5A hold current and 3A trip current specifications match your circuit protection requirements. All listed parts maintain identical trip time (300 ms) and operating temperature range (-40°C ~ 85°C).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message