FSM1J Tactile Switch SPST-NO Equivalent & Substitute Parts

Part Overview

The FSM1J is a tactile switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a single-pole single-throw normally-open (SPST-NO) device rated for 0.05A at 24VDC. This switch features top actuation, through-hole mounting, and a grounding pin, with an operating force of 160gf and mechanical life rating of 100,000 cycles.

The FSM1J is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and maintenance requirements for applications utilizing this component.

Substiute Parts

FSM1J

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1151FSM1J Datasheet

Current PartRFQ

1825955-2

TE Connectivity ALCOSWITCH SwitchesIn Stock: 260621825955-2 Datasheet

DirectRFQ

TLE1105F160Q

E-SwitchIn Stock: 3942TLE1105F160Q Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSM1J are identified based on electrical and mechanical compatibility within the tactile switch category. The primary substitution criteria are:

Electrical Parameters:

• Circuit configuration (SPST-NO)
• Switch function (Off-Mom momentary operation)
• Contact rating voltage and current capacity
• Operating force (160gf)
• Mechanical life (100,000 cycles minimum)

Mechanical Parameters:

• Mounting type (Through Hole)
• Actuator orientation (Top Actuated)
• Outline dimensions (6.00mm x 6.00mm)
• Actuator height off PCB (4.30mm)
• Termination style (PC Pin)
• Grounding pin feature

Environmental Parameters:

• Operating temperature range compatibility
• Regulatory compliance (REACH, RoHS status)

Substitute parts must maintain compatibility across all critical parameters. Variations in actuator material, switch travel distance, and packaging format are permitted when electrical and mechanical specifications remain functionally equivalent.

Parameter Comparison

Engineering Selection Recommendations

1825955-2 (TE Connectivity ALCOSWITCH Switches)

The 1825955-2 is the primary substitute for the FSM1J. Both components are manufactured by TE Connectivity within the FSMJ series and share identical electrical specifications (0.05A @ 24VDC). The 1825955-2 is classified as Active product status, ensuring ongoing availability and supply chain support. This part features an extended operating temperature range (-35°C ~ 85°C) compared to the FSM1J (-20°C ~ 70°C), providing enhanced thermal performance. The 1825955-2 is ROHS3 compliant with MSL rating of 1 (Unlimited), supporting modern manufacturing and environmental standards. Mechanical and dimensional compatibility is complete across all critical parameters.

TLE1105F160Q (E-Switch)

The TLE1105F160Q is an alternative substitute from E-Switch, classified as Active product status. This component maintains mechanical and dimensional compatibility with the FSM1J across mounting type, actuator orientation, outline dimensions, actuator height, operating force, and termination style. The TLE1105F160Q is ROHS3 compliant with MSL rating of 1 (Unlimited). A critical distinction is the contact rating specification: the TLE1105F160Q is rated for 0.05A @ 12VDC, whereas the FSM1J is rated for 0.05A @ 24VDC. This voltage differential must be evaluated against application requirements. The operating temperature range (-20°C ~ 70°C) matches the FSM1J specification. Selection of the TLE1105F160Q is appropriate for applications operating at 12VDC or lower voltage levels.

Frequently Asked Questions (FAQ)

Q: Can the 1825955-2 directly replace the FSM1J in all applications?

A: The 1825955-2 maintains complete electrical and mechanical compatibility with the FSM1J. Both components share identical circuit configuration (SPST-NO), contact rating (0.05A @ 24VDC), operating force (160gf), and mechanical life (100,000 cycles). Dimensional compatibility is confirmed across outline, actuator height, and termination style. The 1825955-2 provides an extended operating temperature range, making it suitable for applications within the FSM1J temperature specification and beyond.

Q: What is the key difference between the 1825955-2 and TLE1105F160Q?

A: The primary difference is the contact rating voltage specification. The 1825955-2 is rated for 0.05A @ 24VDC, matching the FSM1J specification. The TLE1105F160Q is rated for 0.05A @ 12VDC. Both components share identical mechanical and dimensional specifications. Selection between these substitutes depends on the application voltage requirement.

Q: Are there packaging differences between these substitute parts?

A: The FSM1J is specified with packaging format "-" (not detailed). The 1825955-2 and TLE1105F160Q are both supplied in Bulk packaging. Packaging format does not affect electrical or mechanical performance; it relates to order quantity and delivery configuration.

Q: Do the substitute parts meet current regulatory standards?

A: Both substitute parts (1825955-2 and TLE1105F160Q) are ROHS3 compliant and REACH Unaffected. The FSM1J product status is listed as Obsolete with REACH Unaffected designation. The substitute parts provide compliance with current environmental and regulatory requirements.

Q: What is the significance of the switch travel difference between FSM1J and 1825955-2?

A: The FSM1J specifies 0.25mm switch travel, while the 1825955-2 specifies 0.10mm switch travel. Both values fall within the tactile switch category standard range. The reduced switch travel in the 1825955-2 does not affect electrical performance or mechanical life rating. This parameter relates to tactile feedback characteristics and may be evaluated based on user interface requirements.

Q: Can the TLE1105F160Q be used in a 24VDC application?

A: The TLE1105F160Q contact rating is specified as 0.05A @ 12VDC. Application at 24VDC exceeds the rated voltage specification. Component selection must align with the application voltage requirement. For 24VDC applications, the 1825955-2 is the appropriate substitute.