MICROSMD010F-02 Equivalent & Substitute Parts

Part Overview

The MICROSMD010F-02 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse, part of the PolySwitch® miniSMD series. This surface mount component provides overcurrent protection at 30V with a 100 mA hold current rating. The device is designed for automatic reset functionality, restoring circuit operation once the fault condition is cleared. As an active product with 617 units in stock, equivalent alternatives exist to support supply chain flexibility and procurement optimization.

Substiute Parts

MICROSMD010F-02

LittelfuseIn Stock: 670MICROSMD010F-02 Datasheet

Current PartRFQ

MICROSMD010F-2

Littelfuse Inc.In Stock: 29520MICROSMD010F-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MICROSMD010F-02 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 30V maximum
• Hold current (Ih): 100 mA maximum
• Trip current (It): 250 mA
• Maximum current capacity: 10 A
• Trip time: 1 second
• Initial resistance (Ri): 2.1 Ohms minimum
• Post-trip resistance (R1): 15 Ohms maximum
• Package type: 1210 (3225 Metric), Concave surface mount
• Physical dimensions: 0.127" L x 0.102" W, 0.033" maximum thickness
• Operating temperature range: -40°C to 85°C
• Regulatory compliance: CSA, TUV, UL approvals; ROHS3 compliant

The MICROSMD010F-2 meets all specified parameters and qualifies as a direct parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the MICROSMD010F-02 and MICROSMD010F-2 are active products from Littelfuse with identical electrical and mechanical specifications. Selection between these parts should be based on:

• Packaging requirements: MICROSMD010F-2 offers Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for automated assembly processes.
• Inventory availability: MICROSMD010F-2 maintains significantly higher stock levels (29,431 units versus 617 units), supporting extended production runs and supply chain continuity.
• Regulatory compliance: Both parts carry CSA, TUV, and UL approvals with ROHS3 compliance, meeting equivalent standards for industrial and consumer applications.

Frequently Asked Questions (FAQ)

Q: Can MICROSMD010F-2 be used as a direct replacement for MICROSMD010F-02?

A: Yes. Both parts are Littelfuse PolySwitch® polymeric PTC resettable fuses with identical electrical parameters (30V, 100 mA hold current, 250 mA trip current), mechanical dimensions (1210 package, 3.22mm x 2.58mm), and regulatory certifications. They are functionally interchangeable.

Q: What is the difference between miniSMD and microSMD series designations?

A: The series designation reflects internal Littelfuse product line categorization. Both MICROSMD010F-02 (miniSMD) and MICROSMD010F-2 (microSMD) meet identical performance specifications for this application.

Q: Does packaging format affect electrical performance?

A: No. Cut Tape (CT) and Digi-Reel® packaging formats do not alter electrical or thermal characteristics. Packaging selection is determined by assembly equipment compatibility and handling requirements.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across -40°C to 85°C, meeting equivalent thermal requirements for industrial and commercial applications.

Q: What is the significance of the 2A Moisture Sensitivity Level (MSL)?

A: MSL 2A indicates both parts can be stored for up to 4 weeks at specified humidity levels before soldering. This affects shelf life and handling procedures but does not impact functional equivalence.