MINISMDC110-2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MINISMDC110-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® miniSMD series. This component is rated for 8V maximum voltage with 1.1A hold current and is housed in a 1812 (4532 Metric) surface mount package. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MINISMDC110-2
Manufacturer	Littelfuse Inc.
Series	PolySwitch® miniSMD
Voltage - Max	8V
Current - Hold (Ih)	1.1 A
Current - Trip (It)	2.2 A
Resistance - Initial (Ri)	40 mOhms (Min)
Resistance - Post Trip (R1)	210 mOhms (Max)
Operating Temperature Range	-40°C to 85°C
Package / Case	1812 (4532 Metric), Concave
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MINISMDC110-2 is determined by the following critical parameters:

Voltage rating (8V maximum)
Current hold specification (1.1A Ih)
Current trip specification (2.2A It)
Package form factor (1812/4532 Metric, Concave)
Surface mount compatibility
Resistance characteristics (40 mOhms initial, 210 mOhms post-trip maximum)
Operating temperature range (-40°C to 85°C)

The substitute parts identified maintain these electrical and mechanical specifications, ensuring functional equivalence in circuit applications. Differences in product status, RoHS compliance, and manufacturer origin are noted but do not affect electrical interchangeability within the specified parameter envelope.

Parameter Comparison

Parameter	MINISMDC110-2	MINISMDC100F-2	MINISMDC110F-2	MF-MSMF110-2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Bourns Inc.
Voltage - Max	8V	8V	8V	6V
Current - Hold (Ih)	1.1 A	1.1 A	1.1 A	1.1 A
Current - Trip (It)	2.2 A	2.2 A	2.2 A	2.2 A
Resistance - Initial (Ri)	40 mOhms (Min)	40 mOhms (Min)	40 mOhms (Min)	40 mOhms (Min)
Resistance - Post Trip (R1)	210 mOhms (Max)	210 mOhms (Max)	210 mOhms (Max)	210 mOhms (Max)
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	1812 (4532 Metric), Concave	1812 (4532 Metric), Concave	1812 (4532 Metric), Concave	1812 (4532 Metric), Concave
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MINISMDC100F-2 and MINISMDC110F-2 are direct parametric equivalents manufactured by Littelfuse Inc. Both parts are active products with ROHS3 compliance and identical electrical specifications to the obsolete MINISMDC110-2. These represent the primary substitution path for new designs and production continuity.

MF-MSMF110-2 manufactured by Bourns Inc. maintains electrical equivalence across all critical parameters with the exception of maximum voltage rating (6V versus 8V). This part is suitable for applications where the circuit voltage does not exceed 6V. The MF-MSMF110-2 carries AEC-Q200 qualification and ROHS3 compliance. Dimensional variation exists in thickness (0.85mm versus 0.62mm), requiring verification of PCB assembly clearance.

All three substitute parts maintain the 1812 (4532 Metric) package footprint, surface mount compatibility, and specified electrical performance envelope.

Frequently Asked Questions (FAQ)

Q: Can MINISMDC100F-2 or MINISMDC110F-2 be used as direct replacements for MINISMDC110-2?

A: Yes. Both parts are parametric equivalents with identical voltage, current, resistance, and temperature specifications. The primary difference is product status (active versus obsolete) and RoHS3 compliance. Electrical performance and package compatibility are equivalent.

Q: Is MF-MSMF110-2 suitable for all applications using MINISMDC110-2?

A: MF-MSMF110-2 is suitable only for applications where circuit voltage does not exceed 6V. The 8V-rated MINISMDC110-2 cannot be directly replaced by the 6V-rated MF-MSMF110-2 in circuits operating above 6V. Verify circuit voltage requirements before substitution.

Q: Are there package compatibility concerns with MF-MSMF110-2?

A: MF-MSMF110-2 has a maximum thickness of 0.85mm compared to 0.62mm for MINISMDC110-2. Verify PCB assembly clearance and reflow profile compatibility before implementation.

Q: What is the difference between MINISMDC100F-2 and MINISMDC110F-2?

A: Both parts are electrically identical. MINISMDC110F-2 is available in Cut Tape and Digi-Reel packaging with higher inventory (103,300 pcs). MINISMDC100F-2 is available in standard packaging with lower inventory (17,094 pcs). Selection should be based on packaging requirements and supply availability.

Q: Are all substitute parts RoHS3 compliant?

A: MINISMDC100F-2, MINISMDC110F-2, and MF-MSMF110-2 are all ROHS3 compliant. The original MINISMDC110-2 is RoHS non-compliant.

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