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Littelfuse Inc. 1206L150THWR-A — Circuit Protection

Littelfuse 1206L150THWR-A PTC Resettable Fuse, 1.5A, 8V

MPN1206L150THWR-A
Active

Littelfuse Inc. POLY-FUSE® 1206L series, Type Polymeric, 1206L150THWR-A PTC resettable fuse, 1.5 A hold, 8 V max, 100 A max, 300 ms trip, AEC-Q200, surface mount 1206.

$0.5900Ref. price · indicative, final on quote
Littelfuse Inc. 1206L150THWR-A datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1206L150THWR-A specifications
ParameterValue
TypePolymeric
SeriesPOLY-FUSE®, 1206L
MountingSurface Mount
Voltage - max8V
Current - max100 A
Current - trip3 A
Current - hold (Ih)1.5 A
Operating temperature-40°C~85°C
Size (Dimension)0.126\" L x 0.065\" W (3.20mm x 1.65mm)
Approval agencycURus, TUV
PackageTape & Reel (TR); Cut Tape (CT)
RatingsAEC-Q200
Time to trip300 ms
Case1206 (3216 Metric), Concave
Thickness0.039\" (1.00mm)
Resistance - initial (Ri)40 mOhms
Resistance - post trip (R1)120 mOhms

Product details

1.5 A hold, 8 V max — the overcurrent reset point

The Littelfuse 1206L150THWR-A is a polymeric PTC resettable fuse from the POLY-FUSE® 1206L series, rated for a 1.5 A hold current at 8 V maximum. When the fault current exceeds the trip threshold (It=3 A), the polymer heats and its resistance rises sharply, limiting the circuit current within 300 ms typical. The 100 A maximum fault current rating means it can interrupt short-circuit events up to that level without rupturing — a key parameter for automotive and industrial power rails where the prospective fault current can be high.

AEC-Q200 qualification — automotive-grade overcurrent protection

The 1206L150THWR-A carries AEC-Q200 qualification, the automotive passive-component stress-test standard. Approvals from cURus and TUV provide additional safety-agency acceptance for equipment sold into North American and European markets, covering the UL 1434 and IEC 60738-1 standards for polymeric PTCs.

Resistance window and board-fit note

Initial resistance (Ri) is 40 mOhms minimum; after a trip event the post-trip resistance (R1) rises to 120 mOhms maximum. This resistance shift is typical for polymeric PTCs — the trip resets the polymer but the crystalline structure does not fully recover, so the series resistance is permanently higher after the first fault.

Frequently asked questions

Where can I buy the 1206L150THWR-A and how is it quoted?

The 1206L150THWR-A is an active Littelfuse part sourced through authorized and independent distribution.

What is the closest pin-compatible alternative to the 1206L150THWR-A in the POLY-FUSE 1206L family?

The 1206L150THWR-A is the specific 1.5 A hold variant in the 1206L series. Other hold-current ratings (e.g. 0.75 A, 1.0 A, 2.0 A) share the same 1206 footprint and 8 V max rating but differ in trip current and resistance — they are not pin-compatible substitutes without verifying the BOM's overcurrent threshold.

What compliance documentation does Littelfuse provide for the 1206L150THWR-A?

The part carries cURus and TUV agency approvals. Littelfuse typically provides RoHS and REACH compliance declarations upon request through the distribution channel.