PTS18128V150 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PTS18128V150 is an active polymeric PTC resettable fuse manufactured by Eaton - Electronics Division. This surface mount component operates at 8V with a 1.5A hold current and provides automatic overcurrent protection in 1812 (4532 Metric) package format. The device is ROHS3 compliant and carries cURus and TUV approvals. Substitute parts are identified for applications requiring equivalent electrical performance, alternative sourcing, or specific packaging preferences while maintaining core functional parameters.

Substiute Parts

PTS18128V150

Eaton - Electronics DivisionIn Stock: 1788PTS18128V150 Datasheet

Current PartRFQ

0ZCG0150FF2C

Bel Fuse Inc.In Stock: 72140ZCG0150FF2C Datasheet

DirectRFQ

1812L150ZR

Littelfuse Inc.In Stock: 163691812L150ZR Datasheet

DirectRFQ

MINISMDC150F-2

Littelfuse Inc.In Stock: 125212MINISMDC150F-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage rating: 8V maximum
• Current hold (Ih): 1.5A nominal
• Current trip (It): 3A
• Package format: 1812 (4532 Metric), Concave, Surface Mount
• Resistance specifications: Initial (Ri) minimum 40 mOhms, Post-trip (R1) maximum 110 mOhms
• Operating temperature: -40°C to 85°C
• RoHS3 compliance

Identified Substitutes:

0ZCG0150FF2C (Bel Fuse Inc.): Meets all primary electrical parameters. Voltage 8V, Ih 1.5A, It 3A, identical package and mounting. Time to trip 500ms (extended from 300ms). Thickness 0.022" (0.55mm). Carries AEC-Q200 rating with cURus and TUV approvals. MSL 2A.

1812L150ZR (Littelfuse Inc., POLY-FUSE®): Meets package and mounting specifications. Voltage 8V, It 3A, identical resistance parameters. Current hold (Ih) 1.25A (reduced from 1.5A). Time to trip 300ms (matches main part). Thickness 0.049" (1.25mm). MSL 1 (Unlimited).

MINISMDC150F-2 (Littelfuse Inc., PolySwitch®): Meets package and mounting specifications. Current hold (Ih) 1.5A and It 3A match main part. Voltage rating 6V (reduced from 8V). Time to trip 500ms. Thickness 0.019" (0.48mm). CSA, TUV, UL approvals. MSL 2A.

Parameter Comparison

Engineering Selection Recommendations

0ZCG0150FF2C (Bel Fuse Inc.): This substitute provides the closest electrical equivalence to PTS18128V150. Both components maintain 8V voltage rating and 1.5A hold current. The extended time to trip (500ms vs. 300ms) represents a functional difference in response speed. This part carries AEC-Q200 qualification in addition to cURus and TUV approvals, providing automotive-grade reliability. Thickness reduction to 0.022" may benefit space-constrained designs. Suitable for direct replacement in applications where extended trip time is acceptable.

1812L150ZR (Littelfuse Inc., POLY-FUSE®): This substitute maintains identical voltage (8V), trip current (3A), and time to trip (300ms) specifications. The reduced hold current (1.25A vs. 1.5A) represents a functional deviation that narrows the safe operating window. This component is appropriate only for applications where the lower hold current threshold does not compromise circuit protection requirements. MSL 1 rating indicates superior moisture handling. Thickness of 0.049" may present space constraints in compact assemblies.

MINISMDC150F-2 (Littelfuse Inc., PolySwitch®): This substitute matches hold current (1.5A) and trip current (3A) specifications. The reduced voltage rating (6V vs. 8V) represents a significant functional limitation. This component is suitable only for circuits operating at 6V or lower. The extended time to trip (500ms) and reduced thickness (0.019") may offer advantages in specific applications. CSA, TUV, and UL approvals provide broad regulatory coverage.

Frequently Asked Questions (FAQ)

Q: Can 0ZCG0150FF2C replace PTS18128V150 in all applications?

A: 0ZCG0150FF2C provides electrical equivalence with identical voltage and hold current ratings. The extended time to trip (500ms vs. 300ms) affects response speed. Substitution is valid where this timing difference does not compromise circuit protection requirements.

Q: What is the functional impact of the reduced hold current in 1812L150ZR?

A: The 1.25A hold current (vs. 1.5A in PTS18128V150) reduces the maximum continuous current the device can carry without tripping. This narrows the safe operating margin. Substitution is appropriate only where circuit current remains below 1.25A under normal operation.

Q: Is MINISMDC150F-2 suitable for 8V circuits?

A: No. MINISMDC150F-2 carries a 6V maximum voltage rating. Use of this component in 8V circuits exceeds its voltage specification and is not permitted.

Q: How do thickness variations affect PCB assembly?

A: Thickness differences (0.019" to 0.049") may impact solder reflow profiles and component placement. Verify compatibility with assembly equipment and thermal profiles. Thinner components (0.019", 0.022") generally present fewer thermal stress concerns.

Q: What is the significance of AEC-Q200 rating on 0ZCG0150FF2C?

A: AEC-Q200 qualification indicates automotive-grade reliability testing. This rating provides additional assurance for applications requiring automotive or high-reliability standards beyond standard cURus and TUV approvals.

Q: Do all substitutes maintain ROHS3 compliance?

A: Yes. All identified substitutes (0ZCG0150FF2C, 1812L150ZR, MINISMDC150F-2) are ROHS3 compliant, matching the environmental compliance of PTS18128V150.

Q: What packaging format differences exist among these parts?

A: All parts use identical 1812 (4532 Metric) Concave package format and surface mount mounting type. Packaging differences are limited to thickness variation and tape/reel vs. cut tape options.