LS8J2M-T Equivalent & Substitute Parts

Part Overview

The LS8J2M-T is a tactile switch manufactured by Citizen, featuring SPST-NO (Single-Pole Single-Throw Normally Open) circuitry with a contact rating of 0.02A at 12VDC. This switch is designed for surface mount applications with top actuated oval button activation and a switch travel of 0.20mm. The product is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LS8J2M-T

CitizenIn Stock: 3462LS8J2M-T Datasheet

Current PartRFQ

434121025816

Würth ElektronikIn Stock: 12272434121025816 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The LS8J2M-T can be substituted by the Würth Elektronik model 434121025816 based on alignment of critical electrical and mechanical parameters. Substitution compatibility is determined by the following parameters:

• Circuit Configuration: Both parts implement SPST-NO topology
• Switch Function: Both parts support Off-Mom operation
• Mounting Technology: Both use surface mount (SMD/SMT) termination with tab style
• Actuator Orientation: Both feature top actuated activation
• Actuator Height: Matching 2.50mm vertical height off PCB
• Mechanical Endurance: Both rated for 50,000 mechanical cycles
• Moisture Sensitivity: Both assigned MSL Level 1 (Unlimited)
• Voltage Class: Both support 12VDC operation
• Regulatory Compliance: Both designated EAR99 and REACH Unaffected

The substitute part accommodates higher contact current (0.05A versus 0.02A), supporting applications requiring increased electrical capacity while maintaining functional equivalence in lower-current designs.

Parameter Comparison

Engineering Selection Recommendations

Selection between the LS8J2M-T and 434121025816 is determined by product availability and regulatory status. The LS8J2M-T is classified as obsolete, limiting sourcing options for new procurement. The Würth Elektronik 434121025816 offers active product status with full ROHS3 compliance and established supply chain availability.

Both parts maintain equivalent mechanical and electrical functionality within their respective current ratings. The 434121025816 provides expanded contact current capacity (0.05A versus 0.02A) and documented operating temperature range (-40°C ~ 85°C), supporting broader application environments.

Physical footprint differences exist: the 434121025816 measures 6.00mm x 3.80mm compared to the LS8J2M-T at 4.90mm x 3.20mm. PCB layout review is required to confirm mechanical clearance compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 434121025816 directly replace the LS8J2M-T in existing designs? A: Functional replacement is supported due to matching circuit topology (SPST-NO), switch operation (Off-Mom), actuator height (2.50mm), and mechanical life (50,000 cycles). Physical footprint differences (6.00mm x 3.80mm versus 4.90mm x 3.20mm) require PCB layout verification.

Q: What are the key differences between these parts? A: The primary differences are contact current rating (0.05A versus 0.02A), outline dimensions, operating force (160gf versus 180gf), switch travel (0.25mm versus 0.20mm), and product status (active versus obsolete). The substitute part provides higher current capacity and documented temperature range.

Q: Are there packaging considerations for these parts? A: The LS8J2M-T is supplied with unspecified packaging. The 434121025816 is supplied in Tape & Reel format, standard for high-volume surface mount assembly operations.

Q: Do both parts meet the same regulatory and compliance standards? A: Both parts are classified as EAR99, REACH Unaffected, and assigned MSL Level 1 (Unlimited). The 434121025816 additionally carries ROHS3 compliance certification.

Q: Is the higher current rating of the 434121025816 a concern for applications designed for 0.02A? A: No. The substitute part's 0.05A rating indicates maximum contact capacity. Applications operating below 0.02A remain fully compatible with the higher-rated contact design.