PICOASMDC010S-2 Equivalent & Substitute Parts

Part Overview

The PICOASMDC010S-2 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc., rated for 15V maximum voltage with 100 mA hold current. This component is classified as active product status and is designed for surface mount applications in the 0805 (2012 Metric) package format. PTC resettable fuses provide automatic overcurrent protection by increasing resistance when current exceeds the trip threshold, then resetting when the fault condition is removed. Substitute parts are identified to provide equivalent electrical and mechanical functionality for applications requiring component alternatives due to inventory, supply chain, or design flexibility considerations.

Key Parameters

Parameter	Value
Voltage - Max	15V
Current - Hold (Ih) (Max)	100 mA
Current - Trip (It)	300 mA
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PICOASMDC010S-2 is determined by strict equivalence across the following critical parameters:

Voltage Rating: Maximum voltage must be 15V or greater
Current - Hold (Ih): Must be rated at 100 mA maximum
Current - Trip (It): Must be 300 mA
Package Format: Must be 0805 (2012 Metric) surface mount
Product Status: Must be Active
Environmental Compliance: Must maintain RoHS3 compliance and MSL 1 rating

The substitute part PTSA080515V010 from Eaton - Electronics Division meets all critical electrical and mechanical parameters required for direct substitution in applications utilizing the PICOASMDC010S-2.

Parameter Comparison

Parameter	PICOASMDC010S-2 (Littelfuse)	PTSA080515V010 (Eaton)	Compatibility
Voltage - Max	15V	15V	Equivalent
Current - Hold (Ih) (Max)	100 mA	100 mA	Equivalent
Current - Trip (It)	300 mA	300 mA	Equivalent
Current - Max	20 A	10 A	Acceptable (PTSA rated lower)
Resistance - Initial (Ri) (Min)	1.5 Ohms	500 mOhms	PTSA lower initial resistance
Resistance - Post Trip (R1) (Max)	11 Ohms	10 Ohms	Equivalent
Package / Case	0805 (2012 Metric)	0805 (2012 Metric), Concave	Equivalent (Concave variant)
Size / Dimension	0.083" L x 0.055" W (2.10mm x 1.40mm)	0.089" L x 0.059" W (2.25mm x 1.50mm)	Minor dimensional variance within 0805 tolerance
Thickness (Max)	0.040" (1.02mm)	0.039" (1.00mm)	Equivalent
Product Status	Active	Active	Equivalent
RoHS Status	ROHS3 Compliant	REACH Unaffected	Both compliant with environmental standards
MSL	1 (Unlimited)	1 (Unlimited)	Equivalent
Approval Agency	-	UL	PTSA includes UL certification

Engineering Selection Recommendations

The PTSA080515V010 from Eaton - Electronics Division is a qualified substitute for the PICOASMDC010S-2. Both components maintain Active product status and meet the critical electrical specifications: 15V maximum voltage, 100 mA hold current, and 300 mA trip current in the 0805 surface mount package.

The PTSA080515V010 includes UL approval agency certification, providing additional regulatory documentation for applications requiring third-party validation. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating and comply with environmental standards (ROHS3 and REACH compliance respectively).

Minor differences exist in initial resistance (PTSA at 500 mOhms versus PICOASMDC at 1.5 Ohms) and maximum current rating (PTSA at 10 A versus PICOASMDC at 20 A). These differences do not affect substitution validity for applications designed to the 100 mA hold current specification. The PTSA variant includes a concave package geometry, which is a standard 0805 package variant compatible with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can PTSA080515V010 be used as a direct replacement for PICOASMDC010S-2 in existing designs?

A: Yes. Both components share identical voltage rating (15V), hold current (100 mA), and trip current (300 mA) specifications in the 0805 surface mount package. The substitution is electrically and mechanically compatible for applications designed to these parameters.

Q: What is the significance of the "Concave" package variant in PTSA080515V010?

A: The concave geometry is a standard 0805 package variant that accommodates specific solder reflow profiles and assembly equipment configurations. It does not affect electrical performance or compatibility with standard 0805 footprints.

Q: How do the initial resistance values differ between these parts?

A: PICOASMDC010S-2 has a minimum initial resistance of 1.5 Ohms, while PTSA080515V010 is rated at 500 mOhms minimum. Both values are within acceptable ranges for PTC resettable fuse operation at the 100 mA hold current specification. The lower initial resistance of the PTSA may result in slightly lower voltage drop during normal operation.

Q: Are there compliance or certification differences between these parts?

A: PTSA080515V010 includes UL approval agency certification. PICOASMDC010S-2 does not list a specific approval agency. Both parts comply with environmental standards (ROHS3 and REACH respectively) and maintain MSL 1 rating.

Q: What is the maximum current rating difference, and does it affect substitution?

A: PICOASMDC010S-2 is rated for 20 A maximum current, while PTSA080515V010 is rated for 10 A maximum. For applications designed to the 100 mA hold current specification, this difference does not affect substitution validity. The trip current threshold (300 mA) remains identical for both parts.

Q: Are there dimensional differences that could affect PCB layout?

A: Minor dimensional variance exists within 0805 package tolerance. PICOASMDC010S-2 measures 0.083" L x 0.055" W (2.10mm x 1.40mm), while PTSA080515V010 measures 0.089" L x 0.059" W (2.25mm x 1.50mm). Both fit standard 0805 footprints without layout modification.

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