FSM5J Equivalent & Substitute Parts

Part Overview

The FSM5J 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 through-hole mounted switch features top actuation with a 6.00mm x 6.00mm outline and includes a grounding pin. The FSM5J is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

FSM5J

TE Connectivity ALCOSWITCH SwitchesIn Stock: 938FSM5J Datasheet

Current PartRFQ

1-1825955-0

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11601-1825955-0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 1-1825955-0 is functionally equivalent to the FSM5J based on the following critical parameters that determine substitutability:

Electrical Equivalence:

• Identical circuit configuration (SPST-NO)
• Identical contact rating (0.05A @ 24VDC)
• Identical switch function (Off-Mom)

Mechanical Equivalence:

• Identical mounting type (Through Hole)
• Identical actuator orientation (Top Actuated)
• Identical outline dimensions (6.00mm x 6.00mm)
• Identical actuator height off PCB (7.00mm)
• Identical operating force (160gf)
• Identical termination style (PC Pin)
• Identical grounding pin feature

Environmental Equivalence:

• Identical operating temperature range (-35°C ~ 85°C)
• Identical mechanical life rating (100,000 Cycles)
• Identical moisture sensitivity level (MSL 1)

Regulatory Equivalence:

• Identical ECCN classification (EAR99)
• Identical HTSUS code (8536.50.9031)
• Identical REACH status (REACH Unaffected)

The primary difference between these parts is the switch travel specification (0.25mm for FSM5J versus 0.10mm for 1-1825955-0) and actuator material composition (Acetal versus Polyamide PA66/Nylon 6/6). The substitute part 1-1825955-0 is currently in active production status with ROHS3 compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 1-1825955-0 is the direct equivalent for the obsolete FSM5J. Selection of the substitute part is supported by the following factors:

Product Status: The FSM5J is classified as obsolete, while 1-1825955-0 is in active production. This ensures ongoing availability and supply chain continuity for new designs and replacement requirements.

Regulatory Compliance: The substitute part 1-1825955-0 carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions. Both parts maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

Functional Compatibility: All critical electrical and mechanical parameters are identical between the two parts, including circuit configuration, contact rating, mounting type, actuator orientation, outline dimensions, and operating specifications.

Material Consideration: The substitute part uses Polyamide (PA66/Nylon 6/6) actuator material in place of Acetal. Both materials are standard engineering polymers suitable for tactile switch applications within the specified operating temperature range of -35°C to 85°C.

Switch Travel Specification: The substitute part features a reduced switch travel of 0.10mm compared to the original 0.25mm. This difference reflects design refinement within the FSMJ series and does not affect functional compatibility for standard tactile switch applications.

Frequently Asked Questions (FAQ)

Q: Can 1-1825955-0 be used as a direct replacement for FSM5J in existing designs?

A: Yes. The substitute part 1-1825955-0 is electrically and mechanically equivalent to FSM5J across all critical parameters including circuit configuration, contact rating, mounting type, actuator orientation, outline dimensions, and operating specifications. Both parts are from the same FSMJ series manufactured by TE Connectivity ALCOSWITCH Switches.

Q: What is the significance of the different switch travel specifications?

A: The FSM5J specifies 0.25mm switch travel while 1-1825955-0 specifies 0.10mm switch travel. This represents a design refinement within the FSMJ series. Both values fall within acceptable ranges for tactile switch operation and do not affect functional compatibility in standard applications.

Q: Why is the actuator material different between the two parts?

A: The FSM5J uses Acetal actuator material while 1-1825955-0 uses Polyamide (PA66/Nylon 6/6). Both materials are standard engineering polymers suitable for tactile switch applications. The material change reflects manufacturing evolution within the product line. Both materials maintain performance within the specified operating temperature range of -35°C to 85°C.

Q: What is the packaging difference between FSM5J and 1-1825955-0?

A: The FSM5J is supplied in standard packaging, while 1-1825955-0 is supplied in bulk packaging. This difference affects order quantities and handling but does not impact electrical or mechanical performance.

Q: Does 1-1825955-0 meet current regulatory requirements?

A: Yes. The substitute part 1-1825955-0 carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions. Both parts maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

Q: Is 1-1825955-0 currently available?

A: Yes. The substitute part 1-1825955-0 is classified as active production status with 1126 pieces in stock, ensuring availability for immediate procurement and ongoing supply chain support.

Q: Are there any PCB layout considerations when substituting 1-1825955-0 for FSM5J?

A: No. Both parts share identical outline dimensions (6.00mm x 6.00mm), actuator height off PCB (7.00mm), and termination style (PC Pin). PCB layouts designed for FSM5J require no modification for 1-1825955-0 installation.