FSMRA2J Equivalent & Substitute Parts

Part Overview

The FSMRA2J is a tactile switch manufactured by TE Connectivity ALCOSWITCH Switches, classified as a SPST-NO (Single Pole Single Throw - Normally Open) device rated for 0.05A at 24VDC. This switch features side actuation with right-angle mounting through a printed circuit board and operates with an off-momentary function. The product is currently obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

FSMRA2J

TE Connectivity ALCOSWITCH SwitchesIn Stock: 817FSMRA2J Datasheet

Current PartRFQ

1825027-5

TE Connectivity ALCOSWITCH SwitchesIn Stock: 35061825027-5 Datasheet

DirectRFQ

TL1105VF160Q

E-SwitchIn Stock: 19691TL1105VF160Q Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSMRA2J is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria include:

Electrical Parameters:

• Circuit configuration (SPST-NO)
• Contact rating voltage and current specifications
• Switch function (Off-Mom momentary operation)

Mechanical Parameters:

• Mounting type (Through Hole, Right Angle)
• Actuator orientation (Side Actuated)
• Actuator length and outline dimensions
• Operating force (160gf)
• Switch travel distance
• Mechanical life rating (100,000 cycles minimum)

Environmental Parameters:

• Operating temperature range compatibility
• Termination style (PC Pin)

The identified substitute parts maintain these core parameters within acceptable tolerances for direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

1825027-5 (TE Connectivity ALCOSWITCH)

The 1825027-5 is the primary substitute for the FSMRA2J. Both components are manufactured by TE Connectivity ALCOSWITCH and belong to the FSMRAJ series. This part maintains identical electrical specifications (0.05A @ 24VDC), mechanical dimensions (7.11mm x 6.60mm), and operating force (160gf). The 1825027-5 is currently in active production status with 3400 units in stock. The component is ROHS3 compliant and carries REACH Unaffected certification. The actuator material differs (Polybutylene Terephthalate versus Acetal), and switch travel is reduced to 0.25mm. The operating temperature range remains -20°C ~ 105°C, matching the original specification.

TL1105VF160Q (E-Switch)

The TL1105VF160Q is a secondary substitute manufactured by E-Switch from the TL1105 series. This component shares the same circuit configuration (SPST-NO), mounting type (Through Hole, Right Angle), actuator orientation (Side Actuated), and operating force (160gf). Outline dimensions are nearly identical (7.10mm x 6.55mm versus 7.11mm x 6.60mm). The component is ROHS3 compliant and REACH Unaffected. Critical differences include a reduced contact rating voltage specification (0.05A @ 12VDC versus 24VDC) and a narrower operating temperature range (-20°C ~ 70°C versus -20°C ~ 105°C). The TL1105VF160Q is currently in active production with 19629 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the 1825027-5 directly replace the FSMRA2J in all applications?

A: The 1825027-5 maintains electrical and mechanical compatibility with the FSMRA2J. Both components share identical contact ratings (0.05A @ 24VDC), circuit configuration (SPST-NO), mounting type (Through Hole, Right Angle), and operating force (160gf). The primary difference is the switch travel specification (0.25mm versus 0.30mm) and actuator material composition. Applications requiring the original 0.30mm travel specification should evaluate this parameter against functional requirements.

Q: What are the voltage limitations of the TL1105VF160Q substitute?

A: The TL1105VF160Q is rated for 0.05A @ 12VDC, compared to the FSMRA2J specification of 0.05A @ 24VDC. This substitute is suitable only for applications operating at 12VDC or lower. Direct substitution in 24VDC circuits is not supported by the electrical specifications provided.

Q: How do the operating temperature ranges compare?

A: The FSMRA2J and 1825027-5 both operate across -20°C ~ 105°C. The TL1105VF160Q operates across a narrower range of -20°C ~ 70°C. Applications requiring operation above 70°C must use either the original FSMRA2J or the 1825027-5 substitute.

Q: Are there packaging differences between the substitute parts?

A: The 1825027-5 is supplied in Bulk packaging, while the original FSMRA2J packaging is specified as a dash (-). Both components use PC Pin termination style and are suitable for through-hole PCB assembly. Packaging format does not affect electrical or mechanical compatibility.

Q: What compliance certifications apply to the substitute parts?

A: Both substitute parts (1825027-5 and TL1105VF160Q) are ROHS3 compliant and carry REACH Unaffected certification. The original FSMRA2J does not specify RoHS status but is REACH Unaffected. Both substitutes meet current regulatory requirements for electronic component manufacturing and distribution.

Q: How do the mechanical life ratings compare?

A: All three components (FSMRA2J, 1825027-5, and TL1105VF160Q) are rated for 100,000 mechanical cycles, indicating equivalent durability and operational lifespan under specified conditions.

Q: What is the significance of the switch travel difference between parts?

A: The FSMRA2J specifies 0.30mm switch travel, while both substitutes specify 0.25mm. Switch travel defines the distance the actuator moves from the rest position to full actuation. Applications with mechanical constraints or specific tactile feedback requirements should evaluate this parameter against design specifications.