MJTP1138A Tactile Switch SPST-NO Equivalent & Substitute Parts

Part Overview

The MJTP1138A is an APEM Inc. tactile switch featuring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration rated at 0.05A @ 12VDC. This surface mount component operates with 160gf actuation force, 0.25mm switch travel, and supports 100,000 mechanical cycles. The part is RoHS3 compliant, MSL 1 rated, and currently active in production with 810 units in stock.

Equivalent and substitute parts are identified when design requirements permit tolerance of electrical rating variations, voltage rating differences, mechanical life expectations, or packaging format changes while maintaining core functional compatibility: SPST-NO circuit topology, surface mount configuration, top actuated orientation, gull wing termination, and 6.00mm x 6.20mm outline dimensions.

Key Parameters

Parameter	MJTP1138A
Manufacturer	APEM Inc.
Circuit Configuration	SPST-NO
Contact Rating	0.05A @ 12VDC
Mounting Type	Surface Mount
Actuator Orientation	Top Actuated
Termination Style	Gull Wing
Outline Dimensions	6.00mm x 6.00mm
Actuator Height	5.00mm
Operating Force	160gf
Switch Travel	0.25mm
Mechanical Life	100,000 Cycles
Operating Temperature	-20°C ~ 70°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Compatibility Parameters:

Circuit configuration: SPST-NO
Mounting type: Surface Mount
Actuator orientation: Top Actuated
Termination style: Gull Wing
Outline dimensions: 6.00mm x 6.00mm or 6.20mm x 6.20mm (within PCB footprint tolerance)
Switch travel: 0.25mm or 0.20mm
RoHS compliance: ROHS3 or equivalent

Allowable Variation Parameters:

Contact rating voltage: 12VDC, 24VDC, or 28VDC (application dependent)
Contact rating current: 0.05A, 0.4VA, or 3VA (application dependent)
Actuator height: 2.00mm to 5.00mm (design space dependent)
Operating force: 50gf to 160gf (user preference dependent)
Mechanical life: 100,000 to 1,000,000 cycles (reliability requirement dependent)
Operating temperature: -20°C ~ 70°C to -40°C ~ 85°C (environmental requirement dependent)

Substitutes are grouped by voltage rating alignment with the primary 12VDC specification and secondary 24VDC/28VDC variants for applications permitting higher voltage operation.

Parameter Comparison

Part Number	Manufacturer	Circuit	Contact Rating	Actuator Height	Operating Force	Mechanical Life	Operating Temp	Packaging	RoHS Status
MJTP1138A	APEM Inc.	SPST-NO	0.05A @ 12VDC	5.00mm	160gf	100,000	-20°C ~ 70°C	Bulk	ROHS3
FSM1JELGTR	TE Connectivity ALCOSWITCH	SPST-NO	0.05A @ 12VDC	2.00mm	160gf	1,000,000	-35°C ~ 85°C	Tape & Reel	ROHS3
FSM2JELGLTR	TE Connectivity ALCOSWITCH	SPST-NO	0.05A @ 12VDC	2.50mm	100gf	1,000,000	-35°C ~ 85°C	Tape & Reel	RoHS
FSM2JELGXLTR	TE Connectivity ALCOSWITCH	SPST-NO	0.05A @ 12VDC	2.50mm	50gf	1,000,000	-35°C ~ 85°C	Tape & Reel	RoHS
FSM4JSMATR	TE Connectivity ALCOSWITCH	SPST-NO	0.05A @ 24VDC	5.00mm	160gf	100,000	-40°C ~ 85°C	Cut Tape & Digi-Reel	ROHS3
1571563-2	TE Connectivity ALCOSWITCH	SPST-NO	0.05A @ 24VDC	5.00mm	70gf	1,000,000	-35°C ~ 85°C	Cut Tape	ROHS3
TL3301AF100QG	E-Switch	SPST-NO	0.05A @ 12VDC	5.00mm	100gf	100,000	-20°C ~ 70°C	Tape & Reel	ROHS3
HP0315AFKP2-S	NKK Switches	SPST-NO	3VA @ 28VDC	4.40mm	160gf	500,000	-20°C ~ 70°C	Tube	ROHS3
HP0315AFKP4-S	NKK Switches	SPST-NO	0.4VA @ 28VAC/DC	4.40mm	160gf	500,000	-20°C ~ 70°C	Tube	ROHS3

Engineering Selection Recommendations

12VDC Voltage Class Substitutes (Direct Voltage Match):

FSM1JELGTR, FSM2JELGLTR, and FSM2JELGXLTR are TE Connectivity Extended Life series alternatives rated at 0.05A @ 12VDC. These parts feature reduced actuator heights (2.00mm to 2.50mm) compared to MJTP1138A (5.00mm), extended mechanical life (1,000,000 cycles vs. 100,000), and wider operating temperature range (-35°C ~ 85°C). FSM1JELGTR maintains 160gf operating force matching the primary part. FSM2JELGLTR and FSM2JELGXLTR offer reduced operating forces (100gf and 50gf respectively) for applications requiring lighter actuation. All three are RoHS compliant and available in Tape & Reel packaging.

TL3301AF100QG (E-Switch) provides 12VDC operation with 5.00mm actuator height matching MJTP1138A physical profile. Operating force is 100gf (reduced from 160gf). Mechanical life remains 100,000 cycles. Operating temperature range matches the primary part (-20°C ~ 70°C). RoHS3 compliant with Tape & Reel packaging.

24VDC Voltage Class Substitutes (Higher Voltage Operation):

FSM4JSMATR and 1571563-2 are rated at 0.05A @ 24VDC for applications requiring higher voltage operation. FSM4JSMATR maintains 160gf operating force and 100,000 mechanical cycle life with 5.00mm actuator height. 1571563-2 offers extended mechanical life (1,000,000 cycles) with reduced operating force (70gf) and 5.00mm actuator height. Both are ROHS3 compliant. FSM4JSMATR is available in Cut Tape & Digi-Reel packaging; 1571563-2 in Cut Tape.

28VDC Voltage Class Substitutes (Higher Voltage and Current Rating):

HP0315AFKP2-S and HP0315AFKP4-S (NKK Switches HP03 series) operate at 28VDC with significantly higher contact ratings (3VA and 0.4VA respectively) compared to MJTP1138A (0.05A @ 12VDC). These parts feature 4.40mm actuator height, 160gf operating force, and 500,000 mechanical cycle life. Operating temperature range matches the primary part (-20°C ~ 70°C). Both include sealed flux protection and are ROHS3 compliant. Available in Tube packaging.

All substitute parts maintain SPST-NO circuit topology, surface mount configuration, top actuated orientation, gull wing termination, and compatible outline dimensions. Selection depends on voltage requirement, actuator height constraint, mechanical life expectation, and packaging format availability.

Frequently Asked Questions (FAQ)

Q: Can FSM1JELGTR replace MJTP1138A in a 12VDC circuit?

A: Yes. FSM1JELGTR is rated 0.05A @ 12VDC with matching SPST-NO circuit, surface mount configuration, and gull wing termination. The 2.00mm actuator height (vs. 5.00mm on MJTP1138A) requires PCB layout verification. Extended mechanical life (1,000,000 cycles) and wider operating temperature (-35°C ~ 85°C) provide enhanced reliability.

Q: What is the primary difference between FSM2JELGLTR and FSM2JELGXLTR?

A: Both are TE Connectivity Extended Life series rated 0.05A @ 12VDC with 2.50mm actuator height and 1,000,000 mechanical cycles. FSM2JELGLTR operates at 100gf; FSM2JELGXLTR at 50gf. Selection depends on required actuation force for the application.

Q: Can I use FSM4JSMATR in a 12VDC application?

A: No. FSM4JSMATR is rated 0.05A @ 24VDC. Using it in a 12VDC circuit will not provide proper switch operation. Voltage rating must match application requirements.

Q: Are HP0315AFKP2-S and HP0315AFKP4-S interchangeable?

A: Both are NKK Switches HP03 series with identical mechanical specifications (4.40mm height, 160gf force, 500,000 cycles, -20°C ~ 70°C). HP0315AFKP2-S is rated 3VA @ 28VDC; HP0315AFKP4-S is rated 0.4VA @ 28VAC/DC. Selection depends on circuit current and voltage requirements.

Q: What packaging formats are available for MJTP1138A substitutes?

A: Bulk (MJTP1138A, FSM4JSMA), Cut Tape (1571563-2, FSM4JSMATR), Tape & Reel (FSM1JELGTR, FSM2JELGLTR, FSM2JELGXLTR, TL3301AF100QG, HP0315AFKP2-R), and Tube (HP0315AFKP2-S, HP0315AFKP4-S). Packaging selection depends on production volume and assembly process requirements.

Q: Do all substitutes meet RoHS compliance?

A: MJTP1138A, FSM1JELGTR, FSM4JSMATR, 1571563-2, TL3301AF100QG, HP0315AFKP2-S, and HP0315AFKP4-S are ROHS3 compliant. FSM2JELGLTR and FSM2JELGXLTR are RoHS compliant. Verify specific RoHS revision requirement for your application.

Q: What is the mechanical life difference between MJTP1138A and TE Connectivity Extended Life series?

A: MJTP1138A supports 100,000 mechanical cycles. TE Connectivity Extended Life series (FSM1JELGTR, FSM2JELGLTR, FSM2JELGXLTR) support 1,000,000 cycles—a 10x improvement. This extended life is achieved through optimized contact materials and design.

Q: Can actuator height variation affect PCB layout?

A: Yes. MJTP1138A has 5.00mm actuator height. FSM1JELGTR (2.00mm), FSM2JELGLTR (2.50mm), FSM2JELGXLTR (2.50mm), and HP0315AFKP2-S/HP0315AFKP4-S (4.40mm) have different heights. Verify clearance above the PCB for your enclosure design before substitution.

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