PICOSMDC075S-2 Equivalent & Substitute Parts

Part Overview

The PICOSMDC075S-2 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc. in the PolySwitch® miniSMD series. This surface mount component is designed for overcurrent protection in 6V circuits with a 750 mA hold current rating. The part is currently active in production and widely available in inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required for component procurement, inventory management, or supply chain continuity.

Substiute Parts

PICOSMDC075S-2

Littelfuse Inc.In Stock: 1547PICOSMDC075S-2 Datasheet

Current PartRFQ

PICOASMDC075S-2

Littelfuse Inc.In Stock: 4068PICOASMDC075S-2 Datasheet

Parametric EquivalentRFQ

RF5054-000

Littelfuse Inc.In Stock: 1139RF5054-000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PICOSMDC075S-2 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Voltage - Max: 6V
• Current - Hold (Ih) (Max): 750 mA
• Current - Trip (It): 1.5 A
• Current - Max: 40 A
• Time to Trip: 200 ms
• Resistance - Initial (Ri) (Min): 100 mOhms
• Resistance - Post Trip (R1) (Max): 350 mOhms
• Operating Temperature: -40°C ~ 85°C

Mechanical Parameters (Must Match):

• Package / Case: 0805 (2012 Metric), Concave
• Size / Dimension: 0.083" L x 0.055" W (2.10mm x 1.40mm)
• Thickness (Max): 0.037" (0.93mm)
• Mounting Type: Surface Mount

Environmental & Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts meet these criteria and are manufactured by Littelfuse Inc.

Parameter Comparison

Engineering Selection Recommendations

All three parts—PICOSMDC075S-2, PICOASMDC075S-2, and RF5054-000—are active production components from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

PICOSMDC075S-2 (Main Part): Use as the primary selection when no specific compliance or rating requirements are mandated. This part is actively produced and maintains high inventory availability.

PICOASMDC075S-2: This substitute carries AEC-Q200 automotive qualification rating. Select this part when automotive-grade reliability standards are required or when supply of the main part is constrained. Inventory availability is higher than the main part.

RF5054-000: This substitute also carries AEC-Q200 automotive qualification rating. Select this part as an alternative when PICOASMDC075S-2 is unavailable or when specific procurement requirements favor this part number. Inventory availability is moderate.

All three parts are ROHS3 compliant and suitable for applications requiring environmental compliance. The choice between substitutes does not affect electrical performance or thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can PICOASMDC075S-2 be used as a direct replacement for PICOSMDC075S-2?

A: Yes. Both parts have identical electrical parameters (6V, 750 mA hold current, 1.5 A trip current, 200 ms trip time), identical mechanical specifications (0805 package, 2.10mm x 1.40mm dimensions), and identical operating temperature range (-40°C ~ 85°C). The primary difference is that PICOASMDC075S-2 carries AEC-Q200 automotive qualification.

Q: What is the difference between PICOSMDC075S-2 and RF5054-000?

A: Both parts are electrically and mechanically identical with matching voltage, current, resistance, and thermal specifications. Both are housed in 0805 (2012 Metric) concave packages. RF5054-000 carries AEC-Q200 automotive qualification. The parts are interchangeable from an engineering standpoint.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts share identical package specifications: 0805 (2012 Metric) concave case, 0.083" L x 0.055" W (2.10mm x 1.40mm) dimensions, and 0.037" (0.93mm) maximum thickness. PCB footprints and assembly processes are identical.

Q: Which part should I select for automotive applications?

A: For automotive applications, select either PICOASMDC075S-2 or RF5054-000, as both carry AEC-Q200 qualification. PICOSMDC075S-2 does not specify automotive qualification.

Q: Are there any compliance differences between these parts?

A: PICOSMDC075S-2 is specified as ROHS3 compliant. PICOASMDC075S-2 is also ROHS3 compliant. RF5054-000 does not specify RoHS status in the provided data. All parts have MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the hold current specification, and why is it important?

A: The hold current (Ih) is 750 mA maximum for all three parts. This is the maximum continuous current the fuse can carry without tripping. The trip current (It) is 1.5 A, meaning the fuse will activate when current exceeds this threshold. These parameters determine the circuit protection characteristics.