MINIASMDC110F/24-2 Equivalent & Substitute Parts

Part Overview

The MINIASMDC110F/24-2 is a polymeric PTC resettable fuse manufactured by Littelfuse, part of the PolySwitch® miniASMD series. This surface mount component is rated for 24V maximum voltage with a 1.1A hold current and 2.2A trip current, housed in a 1812 (4532 Metric) concave package. The device is designed to provide overcurrent protection in electronic circuits by automatically resetting after a fault condition is cleared. As an active product with AEC-Q200 certification and ROHS3 compliance, equivalent alternatives are available for applications requiring component substitution due to supply constraints, design optimization, or specific performance requirements.

Substiute Parts

MINIASMDC110F/24-2

LittelfuseIn Stock: 1148MINIASMDC110F/24-2 Datasheet

Current PartRFQ

PTSA181224V110

Eaton - Electronics DivisionIn Stock: 2928PTSA181224V110 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MINIASMDC110F/24-2 is determined by the following critical parameters:

• Voltage rating must equal or exceed 24V maximum
• Hold current (Ih) must match 1.1A specification
• Trip current (It) must match 2.2A specification
• Package must be 1812 (4532 Metric) with concave configuration
• Mounting type must be surface mount
• Operating temperature range must encompass -40°C to 85°C
• AEC-Q200 certification required for automotive applications

The PTSA181224V110 from Eaton - Electronics Division meets all critical substitution criteria, maintaining identical voltage, hold current, and trip current specifications while preserving package compatibility and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

Both the MINIASMDC110F/24-2 and PTSA181224V110 are active products with AEC-Q200 certification, qualifying them for automotive and industrial applications. The PTSA181224V110 offers superior moisture sensitivity performance (MSL 1 versus MSL 2A) and lower initial resistance, which may reduce power dissipation in certain circuit configurations. The MINIASMDC110F/24-2 provides a longer trip time (500 ms versus 300 ms), which may be advantageous in applications requiring extended response time before fault isolation. Both components maintain identical hold and trip current specifications and operate across the full -40°C to 85°C temperature range. Selection between these parts should be based on specific application requirements regarding response time, moisture handling, and thermal dissipation characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PTSA181224V110 be used as a direct replacement for the MINIASMDC110F/24-2?

A: Yes, the PTSA181224V110 meets all critical electrical and mechanical substitution criteria. Both components share identical voltage (24V), hold current (1.1A), and trip current (2.2A) specifications, operate across the same temperature range (-40°C to 85°C), and use the same 1812 (4532 Metric) concave surface mount package. Physical dimensions are within acceptable tolerance for PCB footprint compatibility.

Q: What are the key differences between these two parts?

A: The primary differences are response time (MINIASMDC110F/24-2: 500 ms versus PTSA181224V110: 300 ms), initial resistance (60 mOhms versus 40 mOhms), post-trip resistance (180 mOhms versus 260 mOhms), maximum current rating (20A versus 40A), and moisture sensitivity level (MSL 2A versus MSL 1). Both maintain identical hold and trip current specifications.

Q: Are both parts AEC-Q200 certified?

A: Yes, both the MINIASMDC110F/24-2 and PTSA181224V110 carry AEC-Q200 certification, making them suitable for automotive applications.

Q: Does the difference in trip time affect circuit compatibility?

A: Trip time differences (500 ms versus 300 ms) may impact circuit behavior during fault conditions. Applications requiring specific response timing should evaluate whether the faster response of the PTSA181224V110 or the extended response of the MINIASMDC110F/24-2 aligns with circuit protection requirements.

Q: Are there any PCB layout considerations when substituting these parts?

A: Both components use identical 1812 (4532 Metric) concave packages with compatible footprints. Minor dimensional variations (0.181" versus 0.178" length, 0.057" versus 0.051" thickness) are within standard PCB design tolerances and do not require layout modifications.