LS8H6M-T Equivalent & Substitute Parts

Part Overview

The LS8H6M-T is a tactile switch manufactured by Citizen, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.02A at 12VDC. This surface mount component features top actuation with an oval button actuator and is designed for Off-Mom (Momentary) switching applications. The product status is listed as Obsolete, necessitating the identification of equivalent substitute components to maintain design continuity and ensure continued availability for manufacturing and repair applications.

Substiute Parts

LS8H6M-T

CitizenIn Stock: 1135LS8H6M-T Datasheet

Current PartRFQ

EVQ-P9P02M

Panasonic Electronic ComponentsIn Stock: 10801EVQ-P9P02M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of tactile switches is determined by electrical and mechanical compatibility based on the following critical parameters:

Electrical Compatibility Criteria:

• Circuit configuration must match: SPST-NO
• Switch function must match: Off-Mom (Momentary)
• Contact rating voltage must be equal to or greater than the original: minimum 12VDC
• Contact current rating must be equal to or greater than the original: minimum 0.02A

Mechanical Compatibility Criteria:

• Mounting type must be Surface Mount
• Actuator orientation must be Top Actuated
• Actuator height must be within acceptable PCB clearance: 2.10mm nominal
• Overall outline dimensions must fit the available PCB space
• Switch travel distance should be compatible with application requirements
• Operating force should be within acceptable user actuation parameters

The EVQ-P9P02M from Panasonic Electronic Components meets the electrical requirements with 0.02A @ 15VDC rating (exceeds 12VDC requirement) and maintains identical circuit configuration and switch function. Mechanical parameters including actuator height (2.10mm), surface mount configuration, and top actuation are compatible. Although minor differences exist in outline dimensions, operating force, and switch travel, these variations remain within acceptable substitution tolerance for this component category.

Parameter Comparison

Engineering Selection Recommendations

The EVQ-P9P02M is qualified as a suitable substitute for the obsolete LS8H6M-T based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical SPST-NO circuit configuration and Off-Mom switch function. The EVQ-P9P02M's contact rating of 0.02A @ 15VDC exceeds the original component's 0.02A @ 12VDC requirement, ensuring electrical safety margins are maintained.

Mechanical Compatibility: Identical actuator height (2.10mm) and surface mount configuration ensure PCB layout compatibility. Both components feature top actuation and non-illuminated operation. Minor variations in outline dimensions (4.70mm x 3.50mm vs. 4.90mm x 3.20mm) and operating force (500gf vs. 530gf) are within acceptable tolerance for this switch category.

Compliance and Longevity: The EVQ-P9P02M carries active product status with ROHS3 compliance (superior to the obsolete component's RoHS compliance). Mechanical life rating of 200,000 cycles exceeds the original 100,000 cycles, providing extended operational durability. Both components maintain unlimited MSL rating and REACH unaffected status.

Termination and Packaging Considerations: The EVQ-P9P02M uses J Lead termination versus the original SMD Tab configuration. Standard Tape & Reel packaging ensures consistent supply availability. PCB layout modifications may be required to accommodate the different termination style and slight dimensional variations.

Frequently Asked Questions (FAQ)

Q: Can the EVQ-P9P02M directly replace the LS8H6M-T without PCB modifications?

A: Electrical compatibility is confirmed. However, mechanical compatibility requires verification. The components share identical actuator height (2.10mm) and surface mount configuration. Differences in outline dimensions (4.90mm x 3.20mm vs. 4.70mm x 3.50mm), termination style (SMD Tab vs. J Lead), and actuator shape (oval vs. rectangular) may necessitate PCB layout adjustments. Design review of pad placement and footprint is required.

Q: What are the electrical differences between these components?

A: The EVQ-P9P02M operates at a higher voltage rating (15VDC vs. 12VDC) while maintaining the same current rating (0.02A). This provides additional electrical safety margin in typical applications. Both components are SPST-NO with Off-Mom switching function.

Q: How do the mechanical specifications compare?

A: Actuator height is identical (2.10mm). Operating force differs slightly (530gf vs. 500gf), creating minor tactile feel differences. Switch travel increases from 0.20mm to 0.25mm. The EVQ-P9P02M delivers significantly longer mechanical life (200,000 vs. 100,000 cycles), improving long-term reliability.

Q: What are the supply and compliance advantages of the EVQ-P9P02M?

A: The EVQ-P9P02M maintains active product status with guaranteed long-term availability. ROHS3 compliance exceeds the obsolete component's RoHS compliance. Standard Tape & Reel packaging ensures consistent procurement through established supply chains. Both components maintain unlimited MSL rating suitable for all assembly processes.

Q: Are there any considerations for switching from SMD Tab to J Lead termination?

A: Yes. The change from SMD Tab to J Lead termination requires footprint redesign. J Lead configuration typically offers improved solder joint reliability and mechanical stress distribution. Reflow soldering parameters and inspection procedures may require adjustment to accommodate the different termination geometry.

Q: What is the impact of the different actuator shapes (oval vs. rectangular)?

A: Both actuator types provide top actuation with identical height. The rectangular button of the EVQ-P9P02M may provide a different tactile feedback profile compared to the original oval design. User interface testing is recommended if actuator feel is a critical application parameter.