ASMD200F-2 Equivalent & Substitute Parts

Part Overview

The ASMD200F-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., designed for surface mount applications requiring overcurrent protection. This component operates at a maximum voltage of 16V with a hold current of 1.73A and is rated for AEC-Q200 automotive applications. The part is currently active in production with 1825 units available in stock. Substitute parts are identified to provide alternative sourcing options when the primary component is unavailable or when design flexibility is required within compatible electrical and mechanical parameters.

Substiute Parts

ASMD200F-2

Littelfuse Inc.In Stock: 1933ASMD200F-2 Datasheet

Current PartRFQ

MF-SM200-2

Bourns Inc.In Stock: 15290MF-SM200-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASMD200F-2 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must operate at or above the maximum voltage requirement of 16V. The MF-SM200-2 operates at 15V maximum, which is below the primary part specification.

Current Characteristics: The hold current (Ih) and trip current (It) must be compatible with circuit protection requirements. The ASMD200F-2 specifies 1.73A hold current and 3.93A trip current.

Package and Mounting: Both parts must use identical surface mount packaging (2-SMD) with compatible physical dimensions to ensure PCB layout compatibility.

Operating Temperature Range: The operating temperature range of -40°C to 85°C must be maintained or exceeded.

Compliance and Certifications: Both parts maintain AEC-Q200 rating, ROHS3 compliance, and REACH unaffected status, ensuring regulatory compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ASMD200F-2 and MF-SM200-2 maintain active product status and comply with AEC-Q200 automotive ratings. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The MF-SM200-2 offers superior moisture sensitivity performance with MSL 1 (Unlimited) compared to the ASMD200F-2 MSL 2A (4 Weeks), providing extended shelf life and reduced handling constraints.

Physical dimensions are compatible within standard PCB assembly tolerances, with maximum thickness identical at 0.118" (3.00mm).

Selection between these parts should be based on specific circuit voltage requirements and trip time characteristics. The voltage rating differential and trip time variation represent the primary technical distinctions between these components.

Frequently Asked Questions (FAQ)

Q: Can the MF-SM200-2 directly replace the ASMD200F-2 in all applications?

A: Direct replacement depends on circuit voltage specifications. The MF-SM200-2 operates at 15V maximum, which is 1V below the ASMD200F-2 specification of 16V. Applications operating at or below 15V may use the MF-SM200-2. Applications requiring 16V operation must use the ASMD200F-2.

Q: What are the key differences in trip characteristics?

A: The MF-SM200-2 trips at 12 seconds compared to the ASMD200F-2 at 30 seconds. This faster response time may affect circuit protection behavior in applications with specific timing requirements.

Q: Are the physical dimensions compatible for PCB assembly?

A: Both components use 2-SMD surface mount packaging with maximum thickness of 0.118" (3.00mm). Dimensional variations of approximately 0.05mm in length and width are within standard PCB assembly tolerances and do not require layout modifications.

Q: What is the significance of the MSL rating difference?

A: The ASMD200F-2 has MSL 2A (4 Weeks), requiring storage in controlled humidity conditions. The MF-SM200-2 has MSL 1 (Unlimited), allowing indefinite storage without moisture control. This affects inventory management and handling procedures.

Q: Do both parts meet automotive compliance requirements?

A: Both components carry AEC-Q200 ratings, ROHS3 compliance, and REACH unaffected status, meeting current automotive and regulatory standards.