FSMRA5J Equivalent & Substitute Parts

Part Overview

The FSMRA5J is a tactile switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a SPST-NO (Single Pole Single Throw Normally Open) device with a contact rating of 0.05A at 24VDC. This switch features side actuation, through-hole right-angle mounting, and is designed for off-momentary operation with 160gf operating force and 0.30mm switch travel.

The FSMRA5J is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and repair requirements for systems utilizing this switch configuration.

Substiute Parts

FSMRA5J

TE Connectivity ALCOSWITCH SwitchesIn Stock: 948FSMRA5J Datasheet

Current PartRFQ

1-1825027-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 190061-1825027-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSMRA5J is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Circuit configuration (SPST-NO)
• Contact rating (0.05A @ 24VDC)
• Switch function (Off-Mom)

Mechanical Parameters:

• Mounting type (Through Hole, Right Angle)
• Actuator orientation (Side Actuated)
• Actuator length (6.15mm)
• Operating force (160gf)
• Outline dimensions (7.11mm x 6.60mm)
• Termination style (PC Pin)
• Mechanical life (100,000 Cycles)

Environmental & Compliance Parameters:

• Moisture Sensitivity Level (1 - Unlimited)
• REACH Status (REACH Unaffected)
• ECCN (EAR99)
• HTSUS (8536.50.9031)

The substitute part 1-1825027-4 meets all critical electrical and mechanical parameters. Minor variations in switch travel (0.25mm vs. 0.30mm) and actuator material composition remain within functional equivalence for this switch category. The substitute part operates across an extended temperature range (-20°C to 105°C versus -20°C to 70°C) and carries active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

1-1825027-4 as Primary Substitute

The part 1-1825027-4 is the direct equivalent for FSMRA5J applications. This substitute maintains identical electrical performance, mechanical form factor, and mounting characteristics. The substitute carries active product status, ensuring ongoing availability and supply chain continuity.

Compliance & Certification Advantages:

The 1-1825027-4 includes RoHS3 compliance certification, providing enhanced regulatory alignment for new designs and manufacturing environments subject to RoHS directives. Both parts maintain REACH Unaffected status and identical export classification (EAR99).

Temperature Operating Range:

The substitute part operates across an extended temperature range (-20°C to 105°C) compared to the original FSMRA5J (-20°C to 70°C). This extended range provides additional thermal margin for applications operating in elevated ambient conditions.

Material & Mechanical Characteristics:

The actuator material differs (Polyamide/Nylon versus Acetal), and switch travel is reduced from 0.30mm to 0.25mm. These variations remain within functional equivalence for SPST-NO tactile switch applications within the specified electrical and mechanical parameters. Both configurations deliver identical 160gf operating force and 100,000-cycle mechanical life.

Packaging & Inventory:

The substitute part is available in bulk packaging with significantly higher inventory levels (18,970 pieces) compared to the original part (857 pieces), supporting both immediate requirements and long-term production planning.

Frequently Asked Questions (FAQ)

Q: Can 1-1825027-4 be used as a direct replacement for FSMRA5J in existing designs?

A: Yes. The 1-1825027-4 maintains identical electrical ratings (0.05A @ 24VDC, SPST-NO), mechanical mounting (through-hole right-angle), actuator specifications (6.15mm length, 160gf operating force), and physical outline (7.11mm x 6.60mm). PCB layout and circuit integration require no modification.

Q: What is the significance of the switch travel difference (0.30mm vs. 0.25mm)?

A: Switch travel represents the distance the actuator moves before electrical contact closure occurs. The 0.05mm reduction in the substitute part remains within normal manufacturing tolerances for tactile switches and does not affect functional performance in off-momentary applications. Both configurations deliver the same contact rating and mechanical life.

Q: Does the actuator material change from Acetal to Polyamide affect performance?

A: Both materials are standard for tactile switch actuators in this category. Polyamide (Nylon) provides equivalent mechanical durability, operating force consistency, and environmental resistance for the specified operating temperature range. The material change does not impact electrical performance or mechanical life (100,000 cycles).

Q: Why does the substitute part have an extended operating temperature range?

A: The 1-1825027-4 is rated for -20°C to 105°C operation, compared to -20°C to 70°C for the FSMRA5J. This extended upper temperature limit reflects the design characteristics of the substitute part and provides additional thermal margin for applications in elevated ambient environments. The lower temperature limit remains identical.

Q: Is RoHS3 compliance important for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and increasingly required by global manufacturers. The 1-1825027-4 carries RoHS3 certification, while the original FSMRA5J does not specify this compliance. For new designs or manufacturing environments subject to RoHS directives, the substitute part provides regulatory alignment.

Q: Are there any packaging differences between these parts?

A: The FSMRA5J is supplied with unspecified packaging, while the 1-1825027-4 is available in bulk packaging. Bulk packaging is standard for high-volume production and component integration. Confirm packaging requirements with your procurement specifications.

Q: What is the inventory status for each part?

A: The FSMRA5J (obsolete) has 857 pieces in stock. The 1-1825027-4 (active) has 18,970 pieces in stock. The substitute part's active status and significantly higher inventory support both immediate component requirements and sustained production schedules.

Q: Are both parts from the same manufacturer?

A: Yes. Both FSMRA5J and 1-1825027-4 are manufactured by TE Connectivity ALCOSWITCH Switches and belong to the FSMRAJ series. This ensures consistent design philosophy, quality standards, and technical support.

Q: Do export classifications differ between these parts?

A: No. Both parts carry identical export classification (ECCN: EAR99) and HTSUS code (8536.50.9031), ensuring equivalent regulatory treatment for international shipment and trade compliance.