FSM2JA Equivalent & Substitute Parts

Part Overview

The FSM2JA is a tactile switch manufactured by TE Connectivity ALCOSWITCH Switches, classified as a SPST-NO (Single Pole Single Throw Normally Open) momentary contact switch rated for 0.05A at 24VDC. This through-hole mounted component features a top-actuated design with a 6.00mm x 6.00mm footprint and 4.30mm actuator height. The FSM2JA is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Substiute Parts

FSM2JA

TE Connectivity ALCOSWITCH SwitchesIn Stock: 936FSM2JA Datasheet

Current PartRFQ

1825910-2

TE Connectivity ALCOSWITCH SwitchesIn Stock: 23331825910-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSM2JA is determined by strict equivalence across the following critical parameters: circuit configuration (SPST-NO), contact rating (0.05A @ 24VDC), switch function (momentary), mounting type (through hole), actuator orientation (top actuated), outline dimensions (6.00mm x 6.00mm), actuator height (4.30mm), switch travel (0.25mm), termination style (PC pin), and mechanical life rating (100,000 cycles).

The substitute part 1825910-2 maintains equivalence across all these critical parameters. Variations in operating force (260gf versus 160gf), operating temperature range (-20°C ~ 70°C versus -35°C ~ 85°C), actuator material (polyester versus PBT), product status (obsolete versus active), and compliance certifications do not disqualify substitution when the core electrical and mechanical specifications remain identical.

Parameter Comparison

Engineering Selection Recommendations

The 1825910-2 serves as a direct functional substitute for the obsolete FSM2JA. Both components share identical electrical specifications (SPST-NO circuit, 0.05A @ 24VDC contact rating) and mechanical form factors (6.00mm x 6.00mm outline, 4.30mm actuator height, 0.25mm travel, through-hole mounting with PC pin termination).

The 1825910-2 is currently in active production status with 2300 units available in inventory, compared to the FSM2JA's obsolete status. The substitute part offers an extended operating temperature range (-35°C ~ 85°C versus -20°C ~ 70°C) and improved compliance certification (RoHS3 Compliant). The actuator material differs (PBT versus polyester) and the operating force is reduced (160gf versus 260gf), but these variations do not affect functional equivalence for applications within the specified electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Can the 1825910-2 be used as a direct replacement for the FSM2JA in existing designs?

A: Yes. The 1825910-2 maintains identical electrical ratings (0.05A @ 24VDC), circuit configuration (SPST-NO), and mechanical dimensions (6.00mm x 6.00mm outline, 4.30mm actuator height). PCB layouts and connector interfaces designed for the FSM2JA are compatible with the 1825910-2.

Q: What is the significance of the operating force difference between these parts?

A: The FSM2JA requires 260gf actuation force while the 1825910-2 requires 160gf. This difference reflects the change in actuator material from polyester to PBT. Applications requiring specific tactile feedback or force characteristics must evaluate this parameter against design requirements.

Q: Does the extended temperature range of the 1825910-2 affect substitution suitability?

A: The 1825910-2 operates across -35°C ~ 85°C compared to the FSM2JA's -20°C ~ 70°C range. This extended range provides additional operational margin and does not restrict substitution in applications within the original FSM2JA temperature specification.

Q: Are there packaging differences between these parts?

A: The FSM2JA is listed with standard packaging while the 1825910-2 is supplied in bulk packaging. Both maintain identical component specifications and through-hole mounting characteristics.

Q: What compliance certifications apply to the 1825910-2?

A: The 1825910-2 is RoHS3 Compliant and REACH Unaffected. Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9031) classifications.