MICROASMDCH150F-2 Equivalent & Substitute Parts

Part Overview

The MICROASMDCH150F-2 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc. in the PolySwitch® microASMD series. This surface mount component is designed for overcurrent protection in 12V applications with a hold current rating of 1.5 A. The device operates across a temperature range of -40°C to 85°C and carries AEC-Q200 automotive qualification along with TUV and UR approvals. The part is currently Active in product status with 3299 units available in stock.

Identifying equivalent and substitute components for the MICROASMDCH150F-2 is necessary when addressing supply chain requirements, design optimization, or application-specific performance needs while maintaining electrical and mechanical compatibility.

Substiute Parts

MICROASMDCH150F-2

Littelfuse Inc.In Stock: 3377MICROASMDCH150F-2 Datasheet

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MICROASMDCH150F-2

Littelfuse Inc.In Stock: 3377MICROASMDCH150F-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the MICROASMDCH150F-2 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage Rating (Max): 12V
• Current - Hold (Ih) (Max): 1.5 A
• Current - Trip (It): 4.5 A
• Resistance - Initial (Ri) (Min): 25 mOhms
• Resistance - Post Trip (R1) (Max): 250 mOhms
• Operating Temperature Range: -40°C ~ 85°C
• Package / Case: 1210 (3225 Metric), Concave
• Mounting Type: Surface Mount
• Approval Agencies: TUV, UR
• Ratings: AEC-Q200

Substitute parts must match all critical electrical parameters and mechanical specifications to ensure functional equivalence. The polymeric PTC resettable fuse technology, surface mount configuration, and automotive-grade certifications are non-negotiable requirements for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The MICROASMDCH150F-2 is an Active product with full compliance to automotive standards including AEC-Q200 qualification and dual agency approvals from TUV and UR. When selecting equivalent components, the following engineering criteria apply:

Product Status Consideration: Only Active status components ensure ongoing manufacturer support, availability, and compliance with current industry standards.

Compliance and Certification: The AEC-Q200 automotive qualification and TUV/UR approvals are mandatory for applications requiring automotive-grade reliability. Substitute components must maintain identical certification status.

Electrical Performance: The 12V maximum voltage rating, 1.5 A hold current, and 4.5 A trip current define the protection envelope. Substitutes must match these specifications exactly to maintain circuit protection integrity.

Mechanical Compatibility: The 1210 (3225 Metric) concave package with surface mount configuration ensures PCB assembly compatibility. Package dimensions and mounting type must remain unchanged for direct substitution.

Thermal Performance: The -40°C to 85°C operating temperature range establishes the environmental operating envelope. Substitute components must support this full temperature range without performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the MICROASMDCH150F-2 be substituted with a different voltage rating?

A: No. The 12V maximum voltage rating is a critical electrical parameter. Substitutes must maintain this exact specification to ensure proper circuit protection and prevent overvoltage conditions.

Q: Are there alternative package configurations available for this polymeric PTC resettable fuse?

A: The MICROASMDCH150F-2 is specified in the 1210 (3225 Metric) concave surface mount package. Direct substitutes must use this identical package configuration to ensure PCB compatibility and assembly process alignment.

Q: What is the significance of the 1.5 A hold current rating?

A: The 1.5 A hold current (Ih) is the maximum continuous current the device can carry without tripping. This parameter defines the normal operating current threshold and is critical for circuit design. Substitutes must match this specification exactly.

Q: Does the AEC-Q200 rating apply to all substitute components?

A: Yes. The AEC-Q200 automotive qualification is a mandatory requirement for substitution in automotive applications. Only components with identical AEC-Q200 certification are acceptable substitutes.

Q: What is the difference between Current - Hold (Ih) and Current - Trip (It)?

A: Current - Hold (Ih) of 1.5 A is the maximum continuous current without device activation. Current - Trip (It) of 4.5 A is the threshold at which the device transitions to high resistance state. Both parameters must match in substitute components.

Q: How does the Moisture Sensitivity Level (MSL) 2A rating affect component handling?

A: MSL 2A indicates the component can be stored in standard conditions for 4 weeks. This specification affects storage, handling, and assembly procedures but does not impact electrical substitution criteria.

Q: Is the 25 mOhm initial resistance critical for substitution?

A: Yes. The Resistance - Initial (Ri) of 25 mOhms (minimum) defines the normal-state voltage drop across the device. Substitutes must maintain this specification to ensure circuit performance and thermal characteristics remain unchanged.

Q: Can the MICROASMDCH150F-2 be used in non-automotive applications?

A: Yes. While the component carries automotive-grade certifications, it is suitable for any 12V application requiring polymeric PTC resettable fuse protection with the specified electrical and thermal characteristics.