SWT3-G2GTR Equivalent & Substitute Parts

Part Overview

The SWT3-G2GTR is a tactile switch manufactured by TT Electronics / BI Technologies, configured as a SPST-NO (Single Pole Single Throw - Normally Open) momentary contact switch rated for 0.05A at 12VDC. This surface mount component features a rectangular button actuator with 4.30mm height and gull wing termination, designed for applications requiring reliable tactile feedback with 50,000 mechanical cycles.

The SWT3-G2GTR is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or repair requirements for systems utilizing this switch.

Substiute Parts

SWT3-G2GTR

TT Electronics / BI TechnologiesIn Stock: 885SWT3-G2GTR Datasheet

Current PartRFQ

FSMSMTR

TE Connectivity ALCOSWITCH SwitchesIn Stock: 2506FSMSMTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SWT3-G2GTR is based on the following critical parameters:

• Circuit Configuration: Both main and substitute parts must maintain SPST-NO topology to preserve electrical function
• Switch Function: Momentary (Off-Mom) operation must be retained
• Mounting Type: Surface mount compatibility is required for PCB integration
• Actuator Orientation: Top actuated design ensures consistent user interface
• Outline Dimensions: 6.00mm x 4.60mm footprint must match for board layout compatibility
• Termination Style: Gull wing leads are required for surface mount soldering
• Moisture Sensitivity: MSL 1 rating ensures no special handling requirements

The FSMSMTR from TE Connectivity ALCOSWITCH Switches satisfies these core substitution criteria. While the contact rating increases to 0.05A @ 24VDC and mechanical life reduces to 20,000 cycles, these parameters remain within acceptable tolerance for applications originally designed for the SWT3-G2GTR, as the switch will operate at or below its rated specifications in 12VDC circuits.

Parameter Comparison

Engineering Selection Recommendations

The FSMSMTR is the designated manufacturer-recommended substitute for the obsolete SWT3-G2GTR. Selection of this substitute is supported by the following factors:

• Product Status: The FSMSMTR maintains active production status, ensuring long-term availability and supply chain stability compared to the obsolete SWT3-G2GTR
• Regulatory Compliance: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring no change in export or environmental compliance requirements
• Functional Equivalence: Identical circuit configuration (SPST-NO), switch function (Off-Mom), and mechanical interface (surface mount, gull wing termination, 6.00mm x 4.60mm outline) enable direct substitution without design modification
• Electrical Compatibility: The FSMSMTR's 24VDC contact rating exceeds the original 12VDC specification, providing operational margin when used in 12VDC applications
• Environmental Performance: The FSMSMTR's extended operating temperature range (-35°C ~ 85°C) encompasses the original range (-20°C ~ 70°C), supporting broader environmental conditions

Frequently Asked Questions (FAQ)

Q: Can the FSMSMTR be used as a direct replacement for the SWT3-G2GTR without PCB modifications?

A: Yes. Both switches share identical outline dimensions (6.00mm x 4.60mm), gull wing termination, and top actuated configuration. The footprint and solder pattern are compatible. The FSMSMTR actuator height is 4.57mm compared to 4.30mm for the SWT3-G2GTR; this 0.27mm difference does not affect PCB assembly or mechanical clearance in standard applications.

Q: What is the impact of the FSMSMTR's higher contact rating (24VDC vs. 12VDC)?

A: The higher contact rating indicates the FSMSMTR can safely handle higher voltage and current levels. When used in a 12VDC circuit, the switch operates below its rated specification, providing additional safety margin and reliability. No circuit modification is required.

Q: Why does the FSMSMTR have lower mechanical life (20,000 cycles vs. 50,000 cycles)?

A: Mechanical life specifications reflect design characteristics and testing protocols specific to each manufacturer. The FSMSMTR's 20,000-cycle rating remains suitable for most tactile switch applications. Applications requiring higher cycle counts should evaluate specific duty cycle requirements against this specification.

Q: Are there packaging differences between the SWT3-G2GTR and FSMSMTR?

A: The SWT3-G2GTR is available in standard packaging. The FSMSMTR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, which are standard for high-volume surface mount component distribution and are compatible with automated assembly equipment.

Q: Do both switches have the same moisture sensitivity requirements?

A: Yes. Both the SWT3-G2GTR and FSMSMTR are rated MSL 1 (Unlimited), indicating no special moisture sensitivity precautions are required during storage, handling, or assembly.