FSM16J Equivalent & Substitute Parts

Part Overview

The FSM16J is a tactile switch manufactured by TE Connectivity ALCOSWITCH Switches, classified as a SPST-NO (Single Pole Single Throw - Normally Open) momentary contact switch. This component is rated for 0.05A at 24VDC and features top actuation through-hole mounting with a 6.00mm x 6.00mm footprint and 17.00mm actuator height. The FSM16J is currently listed as obsolete, necessitating identification of equivalent substitute components that maintain functional and mechanical compatibility for new designs or replacement applications.

Substiute Parts

FSM16J

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1180FSM16J Datasheet

Current PartRFQ

3-1825910-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 24273-1825910-1 Datasheet

DirectRFQ

TL1105LF160Q

E-SwitchIn Stock: 24005TL1105LF160Q Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSM16J are identified based on strict equivalence across the following critical parameters: circuit configuration (SPST-NO), switch function (momentary), mounting type (through-hole), actuator orientation (top-actuated), outline dimensions (6.00mm x 6.00mm), actuator height (17.00mm), operating force (160gf), switch travel (0.25mm), mechanical life (100,000 cycles), and termination style (PC pin).

The substitute parts listed maintain these core mechanical and electrical characteristics. Variations in contact rating voltage, operating temperature range, actuator material composition, and product status are noted but do not preclude functional substitution when the application voltage and thermal environment are compatible with the substitute component specifications.

Parameter Comparison

Engineering Selection Recommendations

3-1825910-1 (TE Connectivity ALCOSWITCH Switches)

The 3-1825910-1 is the primary substitute for the obsolete FSM16J. This component is manufactured by the same supplier and maintains identical electrical contact ratings (0.05A @ 24VDC), mechanical specifications, and footprint. The 3-1825910-1 holds active product status and carries ROHS3 compliance certification with MSL 1 rating, indicating superior environmental stability compared to the original FSM16J. The operating temperature range (-40°C ~ 105°C) exceeds the FSM16J specification, providing broader thermal applicability. Direct PCB layout compatibility is confirmed.

TL1105LF160Q (E-Switch)

The TL1105LF160Q is a secondary substitute option from E-Switch. This component shares identical mechanical characteristics and footprint with the FSM16J but operates at a reduced contact rating of 0.05A @ 12VDC. The TL1105LF160Q is suitable for applications where the circuit voltage does not exceed 12VDC. This component is active in production and carries ROHS3 compliance with MSL 1 rating. The operating temperature range (-20°C ~ 70°C) is narrower than the FSM16J and should be evaluated against specific application thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the 3-1825910-1 be used as a direct replacement for the FSM16J in all applications?

A: The 3-1825910-1 maintains identical electrical contact ratings (0.05A @ 24VDC), circuit configuration (SPST-NO), and mechanical specifications including footprint, actuator height, operating force, and switch travel. PCB layout compatibility is direct. The component is suitable for replacement in applications operating within the specified voltage and temperature parameters.

Q: What is the key difference between the 3-1825910-1 and TL1105LF160Q?

A: The primary difference is the contact rating voltage. The 3-1825910-1 is rated for 0.05A @ 24VDC, matching the original FSM16J specification. The TL1105LF160Q is rated for 0.05A @ 12VDC. Both components share identical mechanical specifications and footprint. Selection depends on circuit voltage requirements.

Q: Can the TL1105LF160Q be used in a 24VDC circuit?

A: The TL1105LF160Q is specified for 0.05A @ 12VDC. Application in circuits exceeding this voltage rating is outside the component's electrical specification and is not supported.

Q: Are there packaging differences between these substitute parts?

A: The FSM16J was supplied in standard packaging. The 3-1825910-1 and TL1105LF160Q are supplied in bulk packaging. Packaging format does not affect component functionality or PCB integration.

Q: What is the significance of the operating temperature range differences?

A: The FSM16J operates from -35°C to 85°C. The 3-1825910-1 extends this range to -40°C to 105°C, providing broader thermal applicability. The TL1105LF160Q operates from -20°C to 70°C, which is narrower than the original specification. Component selection should align with the application's thermal environment.

Q: Are both substitute parts RoHS compliant?

A: Both the 3-1825910-1 and TL1105LF160Q carry ROHS3 compliance certification. The original FSM16J RoHS status was not specified in the available documentation.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions and requires no special moisture control measures during handling or storage. This represents the lowest moisture sensitivity classification.