SWT7-J3GTR Equivalent & Substitute Parts

Part Overview

The SWT7-J3GTR is a tactile switch manufactured by TT Electronics/BI, 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 3.10mm actuator height with 160gf operating force and 100,000 cycle mechanical life rating. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SWT7-J3GTR

TT Electronics/BIIn Stock: 730SWT7-J3GTR Datasheet

Current PartRFQ

EVQ-3P202K

Panasonic Electronic ComponentsIn Stock: 6297EVQ-3P202K Datasheet

MFR RecommendedRFQ

EVQ-P1905M

Panasonic Electronic ComponentsIn Stock: 44847EVQ-P1905M Datasheet

MFR RecommendedRFQ

EVQ-P2H02B

Panasonic Electronic ComponentsIn Stock: 10934EVQ-P2H02B Datasheet

MFR RecommendedRFQ

EVQ-P2K02Q

Panasonic Electronic ComponentsIn Stock: 10507EVQ-P2K02Q Datasheet

MFR RecommendedRFQ

KSC221JLFS

C&KIn Stock: 10137KSC221JLFS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SWT7-J3GTR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO momentary contact
• Mounting type: Surface Mount with J Lead termination
• Actuator orientation: Top Actuated
• Contact rating compatibility: Minimum 0.05A @ 12VDC or equivalent voltage/current envelope
• Outline dimensions: Footprint compatibility within PCB layout constraints
• Mechanical life: Minimum 100,000 cycles for equivalent reliability

Substitute Categories:

Direct Equivalents (Identical Electrical & Mechanical Specifications): EVQ-P1905M matches the SWT7-J3GTR across all critical parameters: 0.05A @ 12VDC contact rating, 160gf operating force, 100,000 cycle mechanical life, and compatible outline dimensions (6.10mm x 6.00mm).

Functional Substitutes (Higher Performance Ratings): EVQ-P2H02B, EVQ-P2K02Q, and EVQ-P3P202K provide SPST-NO momentary functionality with enhanced specifications. These parts operate at 0.02A @ 15VDC (higher voltage rating) with improved mechanical life (500,000 to 1,000,000 cycles) and reduced actuator height (2.50mm). Substitution is valid when circuit design permits lower current ratings and higher voltage margins.

KSC221JLFS (C&K) offers 0.05A @ 32VDC contact rating with IP67 ingress protection, suitable for applications requiring sealed switch performance and higher voltage tolerance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): EVQ-P1905M is the primary substitute, offering identical electrical and mechanical performance to the SWT7-J3GTR. This Panasonic part maintains 0.05A @ 12VDC contact rating, 160gf operating force, and 100,000 cycle mechanical life. The part is active in production with ROHS3 compliance and extended temperature range (-40°C ~ 85°C), providing superior long-term availability and environmental compliance compared to the obsolete SWT7-J3GTR.

For Enhanced Reliability Applications: EVQ-P2H02B provides the highest mechanical life rating (1,000,000 cycles) among available substitutes. This part is suitable for high-cycle applications where extended component life is required. The reduced actuator height (2.50mm) and smaller footprint (4.70mm x 4.60mm) may require PCB layout verification. The 0.02A @ 15VDC rating is compatible with circuits designed for lower current draw and higher voltage margins.

For Sealed/Protected Environments: KSC221JLFS (C&K) is the only substitute offering IP67 ingress protection (dust tight, waterproof). This part maintains 0.05A contact rating with enhanced 32VDC voltage rating. The 4.60mm actuator height and 6.20mm x 6.20mm footprint are compatible with the original SWT7-J3GTR layout. This selection is appropriate for applications requiring environmental sealing.

For Compact PCB Designs: EVQ-P2H02B, EVQ-P2K02Q, and EVQ-3P202K offer the smallest footprint (4.70mm x 4.60mm) and lowest actuator height (2.50mm). These parts are suitable for space-constrained designs where PCB real estate is limited. Circuit design must accommodate the 0.02A @ 15VDC contact rating.

All substitute parts maintain SPST-NO momentary contact configuration, surface mount J Lead termination, and MSL 1 moisture sensitivity rating. All active substitutes provide ROHS3 compliance and extended operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can EVQ-P1905M be used as a direct replacement for SWT7-J3GTR without circuit modification?

A: Yes. EVQ-P1905M matches all critical electrical and mechanical parameters: 0.05A @ 12VDC contact rating, 160gf operating force, 100,000 cycle mechanical life, and compatible outline dimensions (6.10mm x 6.00mm vs. 6.30mm x 6.20mm). The 5.00mm actuator height (vs. 3.10mm original) requires PCB clearance verification. No circuit redesign is necessary.

Q: What is the difference between the Panasonic EVQ-P2 series substitutes (EVQ-P2H02B and EVQ-P2K02Q)?

A: Both parts share identical electrical ratings (0.02A @ 15VDC), outline dimensions (4.70mm x 4.60mm), and actuator height (2.50mm). The primary difference is operating force: EVQ-P2H02B requires 250gf while EVQ-P2K02Q requires 350gf. EVQ-P2H02B offers superior mechanical life (1,000,000 cycles vs. 500,000 cycles). Selection depends on required actuation force and cycle life requirements.

Q: Is the KSC221JLFS suitable for applications requiring the original 0.05A @ 12VDC specification?

A: Yes. KSC221JLFS is rated for 0.05A @ 32VDC, which exceeds the original 0.05A @ 12VDC requirement. The higher voltage rating provides additional design margin. The primary advantage is IP67 ingress protection for sealed or wet environments. Footprint compatibility (6.20mm x 6.20mm vs. 6.30mm x 6.20mm) and actuator height (4.60mm vs. 3.10mm) require PCB layout verification.

Q: Can lower-current-rated substitutes (0.02A @ 15VDC) be used in circuits designed for 0.05A @ 12VDC?

A: Substitution is valid only if the actual circuit current draw does not exceed 0.02A. The higher voltage rating (15VDC vs. 12VDC) provides additional margin. Circuit analysis must confirm that maximum operating current remains below the substitute part's 0.02A rating. If circuit current exceeds 0.02A, these substitutes are not suitable.

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

A: Actuator height affects clearance above the PCB surface. The original SWT7-J3GTR has 3.10mm height. EVQ-P1905M (5.00mm) requires additional vertical clearance. EVQ-P2 series parts (2.50mm) provide reduced height for compact designs. KSC221JLFS (4.60mm) is slightly taller than the original. PCB enclosure design and component placement must accommodate these height variations.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts (EVQ-P1905M, EVQ-P2H02B, EVQ-P2K02Q, EVQ-3P202K, and KSC221JLFS) are ROHS3 compliant. The original SWT7-J3GTR RoHS status is not specified. All substitutes meet current environmental compliance requirements.

Q: What is the mechanical life difference between substitutes, and when does it matter?

A: Mechanical life ratings range from 100,000 cycles (EVQ-P1905M, matching original) to 1,000,000 cycles (EVQ-P2H02B). For consumer applications with infrequent actuation, 100,000 cycles is typically sufficient. For industrial or high-cycle applications (frequent button presses), higher-rated parts (500,000 to 1,000,000 cycles) extend component service life and reduce replacement frequency.