Equivalent & Substitute Parts for 1206L160PR

Part Overview

The 1206L160PR is a Polymeric PTC Resettable Fuse manufactured by Littelfuse, rated at 6V with a 1.6 A hold current. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement. The 1206 (3216 Metric) surface mount package with concave configuration remains a standard form factor, enabling direct mechanical and electrical compatibility with active alternative products.

Key Parameters

Parameter	Value
Voltage - Max	6V
Current - Hold (Ih) (Max)	1.6 A
Current - Trip (It)	3.2 A
Package / Case	1206 (3216 Metric), Concave
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Type	Polymeric
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 1206L160PR is determined by the following criteria:

Voltage rating must equal or exceed 6V maximum
Package / Case must be 1206 (3216 Metric), Concave surface mount configuration
Operating temperature range must encompass -40°C ~ 85°C
Type must be Polymeric PTC Resettable Fuse
RoHS3 compliance required

The two substitute parts identified meet these mechanical and electrical compatibility requirements. However, they differ in current-handling characteristics:

NANOSMDC075F-2: Lower hold current (750 mA) and faster trip time (100 ms)
MF-NSMF150-2: Hold current (1.5 A) closely matched to original specification with moderate trip time (300 ms)

Parameter Comparison

Parameter	1206L160PR (Original)	NANOSMDC075F-2	MF-NSMF150-2
Manufacturer	Littelfuse	Littelfuse Inc.	Bourns Inc.
Voltage - Max	6V	6V	6V
Current - Hold (Ih) (Max)	1.6 A	750 mA	1.5 A
Current - Trip (It)	3.2 A	1.5 A	3 A
Time to Trip	400 ms	100 ms	300 ms
Resistance - Initial (Ri) (Min)	25 mOhms	90 mOhms	30 mOhms
Resistance - Post Trip (R1) (Max)	110 mOhms	300 mOhms	130 mOhms
Operating Temperature	-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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	CSA, TUV, UL	cURus, TUV

Engineering Selection Recommendations

MF-NSMF150-2 is the primary substitute for 1206L160PR applications. This Bourns component maintains a hold current specification (1.5 A) within 6% of the original 1.6 A rating, ensuring functional equivalence in circuit protection. The trip current (3 A) and trip time (300 ms) remain closely aligned with the original design intent. MF-NSMF150-2 carries Active product status with AEC-Q200 qualification, supporting automotive and industrial applications. Compliance certifications include cURus and TUV approval, matching the original part's regulatory framework.

NANOSMDC075F-2 serves applications requiring lower current thresholds and faster response times. The 750 mA hold current and 100 ms trip time represent a significant departure from the original specification and are suitable only for circuits designed to tolerate these reduced protection parameters. This Littelfuse component maintains Active status with expanded certifications (CSA, TUV, UL) and is appropriate for consumer and industrial applications where lower current protection is acceptable.

Frequently Asked Questions (FAQ)

Q: Can NANOSMDC075F-2 directly replace 1206L160PR in existing designs?

A: Direct replacement is not recommended. NANOSMDC075F-2 operates at 750 mA hold current versus the original 1.6 A specification. Circuit redesign or validation is required to confirm compatibility with the lower protection threshold.

Q: Is MF-NSMF150-2 a direct drop-in substitute for 1206L160PR?

A: Yes, from a mechanical and electrical standpoint. MF-NSMF150-2 matches the 1206 (3216 Metric) package configuration and operates within 6% of the original 1.6 A hold current specification. No PCB layout modifications are necessary.

Q: What is the significance of the Obsolete product status for 1206L160PR?

A: Obsolete status indicates the manufacturer has discontinued production. Both substitute parts carry Active status, ensuring long-term availability and supply chain stability for new designs and production runs.

Q: How do resistance characteristics affect substitution decisions?

A: Initial resistance (Ri) and post-trip resistance (R1) influence circuit behavior during normal operation and fault conditions. MF-NSMF150-2 exhibits minimal deviation from the original (30 mOhms vs. 25 mOhms initial resistance), maintaining circuit performance. NANOSMDC075F-2 shows higher post-trip resistance (300 mOhms vs. 110 mOhms), which may affect circuit recovery characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both NANOSMDC075F-2 and MF-NSMF150-2 are ROHS3 compliant, matching the environmental compliance requirement of the original 1206L160PR.

Q: What certifications should I verify for my application?

A: MF-NSMF150-2 carries cURus and TUV approval. NANOSMDC075F-2 carries CSA, TUV, and UL approval. Confirm that the selected substitute meets the specific regulatory requirements for your target market and application class.

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