MJTP1138G Equivalent & Substitute Parts

Part Overview

The MJTP1138G is an APEM Inc. tactile switch featuring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration with momentary operation. This surface mount component is rated for 0.05A at 12VDC with top actuated orientation and gull wing termination. The part is Active status and ROHS3 compliant, designed for applications requiring tactile feedback with 100,000 mechanical cycle life. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and functional characteristics align with the original specification.

Key Parameters

Parameter	MJTP1138G Value
Manufacturer	APEM Inc.
Circuit Configuration	SPST-NO
Switch Function	Off-Mom (Momentary)
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	7.00mm
Operating Force	160gf
Operating Temperature Range	-20°C ~ 70°C
Switch Travel	0.25mm
Mechanical Life	100,000 Cycles
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MJTP1138G is determined by the following critical parameters:

Electrical Compatibility: Contact rating must support the 0.05A @ 12VDC specification. Parts rated for higher voltage or current capacity (such as 0.1A @ 16VAC/DC) are electrically compatible as they exceed minimum requirements.

Mechanical Compatibility: Surface mount configuration with gull wing termination is mandatory. Actuator orientation must be top actuated. Outline dimensions and actuator height variations are acceptable within PCB layout constraints.

Functional Requirements: SPST-NO circuit and momentary (Off-Mom) operation are required. All substitute candidates maintain these characteristics.

Environmental & Compliance: ROHS3 compliance and MSL 1 rating are standard across all candidates. Operating temperature ranges may vary; substitutes with extended or equivalent ranges are acceptable.

Packaging Considerations: Original part is supplied in Bulk packaging. Substitute parts are available in alternative packaging formats (Tube, Cut Tape & Digi-Reel, Tape & Reel) without affecting electrical or mechanical function.

Parameter Comparison

Parameter	MJTP1138G (APEM)	7914G-1-000 (Bourns)	7914G-1-000E (Bourns)	7914G-1-024E (Bourns)	7914G-1-032E (Bourns)	FSM1JELGTR (TE)	FSM2JELGLTR (TE)	FSM2JELGXLTR (TE)	FSM6JSMA (TE)
Circuit	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO
Switch Function	Off-Mom	Off-Mom	Off-Mom	Off-Mom	Off-Mom	Off-Mom	Off-Mom	Off-Mom	Off-Mom
Contact Rating	0.05A @ 12VDC	0.1A @ 16VAC/DC	0.1A @ 16VAC/DC	0.1A @ 16VAC/DC	0.1A @ 16VAC/DC	0.05A @ 12VDC	0.05A @ 12VDC	0.05A @ 12VDC	0.05A @ 24VDC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Actuator Orientation	Top Actuated	Top Actuated	Top Actuated	Top Actuated	Top Actuated	Top Actuated	Top Actuated	Top Actuated	Top Actuated
Termination Style	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing
Outline Dimensions	6.00mm x 6.00mm	5.00mm x 5.00mm	5.00mm x 5.00mm	5.00mm x 5.00mm	5.00mm x 5.00mm	6.20mm x 6.20mm	6.20mm x 6.20mm	6.20mm x 6.20mm	6.00mm x 6.00mm
Actuator Height	7.00mm	4.19mm	4.19mm	2.62mm	3.43mm	2.00mm	2.50mm	2.50mm	7.00mm
Operating Force	160gf	300gf	300gf	300gf	300gf	160gf	100gf	50gf	160gf
Operating Temperature	-20°C ~ 70°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C	-40°C ~ 85°C
Switch Travel	0.25mm	—	—	—	—	0.25mm	0.25mm	0.25mm	0.25mm
Mechanical Life	100,000 Cycles	100,000 Cycles	100,000 Cycles	100,000 Cycles	100,000 Cycles	1,000,000 Cycles	1,000,000 Cycles	1,000,000 Cycles	100,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Bulk	Tube	Cut Tape & Digi-Reel	Tape & Reel	Cut Tape & Digi-Reel	Tape & Reel	Tape & Reel	Tape & Reel	Bulk
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full regulatory compliance (ROHS3 or RoHS compliant, MSL 1 rating). Selection between candidates depends on specific application constraints:

Bourns 7914G Series (7914G-1-000, 7914G-1-000E, 7914G-1-024E, 7914G-1-032E): These parts exceed the electrical specification with 0.1A @ 16VAC/DC rating and provide extended operating temperature range (-55°C ~ 125°C). Actuator height varies from 2.62mm to 4.19mm, requiring PCB layout verification. Operating force is 300gf, higher than the original 160gf. IP67 ingress protection is provided. Mechanical life matches at 100,000 cycles. Outline dimensions are 5.00mm x 5.00mm, smaller than the original.

TE Connectivity FSM1JELGTR: Exact electrical match at 0.05A @ 12VDC with identical 160gf operating force and 0.25mm switch travel. Actuator height is 2.00mm (significantly lower than original 7.00mm). Mechanical life is extended to 1,000,000 cycles. Operating temperature range is -35°C ~ 85°C. Outline is 6.20mm x 6.20mm. Available in Tape & Reel packaging.

TE Connectivity FSM2JELGLTR: Electrical match at 0.05A @ 12VDC with reduced 100gf operating force. Actuator height is 2.50mm. Mechanical life is 1,000,000 cycles. Operating temperature range is -35°C ~ 85°C. Outline is 6.20mm x 6.20mm.

TE Connectivity FSM2JELGXLTR: Electrical match at 0.05A @ 12VDC with minimal 50gf operating force. Actuator height is 2.50mm. Mechanical life is 1,000,000 cycles. Operating temperature range is -35°C ~ 85°C. Outline is 6.20mm x 6.20mm.

TE Connectivity FSM6JSMA: Electrical rating is 0.05A @ 24VDC (higher voltage tolerance). Operating force is 160gf, matching the original. Actuator height is 7.00mm, identical to original. Mechanical life is 100,000 cycles. Operating temperature range is -40°C ~ 85°C. Outline is 6.00mm x 6.00mm, matching original dimensions. Available in Bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can I substitute a Bourns 7914G part for the MJTP1138G?

A: Yes. The 7914G series maintains SPST-NO circuit configuration and momentary operation. All variants are electrically compatible, as the 0.1A @ 16VAC/DC rating exceeds the 0.05A @ 12VDC requirement. However, actuator height varies by variant (2.62mm to 4.19mm versus original 7.00mm), and operating force is higher at 300gf. PCB layout must accommodate the smaller 5.00mm x 5.00mm outline and lower actuator profile.

Q: What is the difference between FSM1JELGTR and FSM2JELGLTR?

A: Both are TE Connectivity parts with identical electrical ratings (0.05A @ 12VDC) and 0.25mm switch travel. FSM1JELGTR has 160gf operating force and 2.00mm actuator height. FSM2JELGLTR has 100gf operating force and 2.50mm actuator height. Selection depends on required actuation force and available PCB clearance.

Q: Why does FSM6JSMA have a higher voltage rating (24VDC)?

A: FSM6JSMA is rated for 0.05A @ 24VDC, providing higher voltage tolerance than the original 12VDC specification. This part is electrically compatible for 12VDC applications, as it exceeds the voltage requirement. The higher rating does not affect functionality in lower-voltage circuits.

Q: Are all substitute parts available in the same packaging as the original?

A: No. The original MJTP1138G is supplied in Bulk packaging. Bourns 7914G variants are available in Tube, Cut Tape & Digi-Reel, or Tape & Reel formats. TE Connectivity FSM series parts are available in Tape & Reel or Bulk packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: What is the impact of different actuator heights on PCB design?

A: Actuator height determines the vertical clearance required above the PCB. The original MJTP1138G requires 7.00mm clearance. Bourns 7914G variants require 2.62mm to 4.19mm, allowing lower-profile designs. TE Connectivity FSM1JELGTR requires only 2.00mm. FSM6JSMA matches the original at 7.00mm. PCB enclosure or overlay design must accommodate the selected actuator height.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 compliant or RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original specification. ECCN and HTSUS classifications are identical across all parts.

Q: Which substitute offers the longest mechanical life?

A: TE Connectivity FSM series parts (FSM1JELGTR, FSM2JELGLTR, FSM2JELGXLTR) provide 1,000,000 mechanical cycles, compared to 100,000 cycles for the original and Bourns 7914G variants. This extended life may be beneficial for high-cycle applications.

Q: Can I use FSM2JELGXLTR if my application requires lower actuation force?

A: Yes. FSM2JELGXLTR is rated for 50gf operating force, the lowest among all candidates. This part is suitable for applications requiring minimal actuation effort. Electrical and mechanical compatibility remain unchanged at 0.05A @ 12VDC with 0.25mm switch travel.

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