LS70C2-T Equivalent & Substitute Parts

Part Overview

The LS70C2-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 component is designed for surface mount applications with top actuation and a compact 2.80mm x 2.30mm footprint. The LS70C2-T is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing production and maintenance applications. The LS70 series provides alternative configurations that maintain functional compatibility while offering different mechanical and environmental specifications.

Substiute Parts

LS70C2-T

CitizenIn Stock: 45435LS70C2-T Datasheet

Current PartRFQ

LS70C2S-T

CitizenIn Stock: 19137LS70C2S-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LS70C2-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (Momentary)
• Contact rating: 0.02A @ 12VDC
• Mounting type: Surface Mount
• Outline dimensions: 2.80mm x 2.30mm
• Termination style: SMD (SMT) Tab
• Actuator orientation: Top Actuated
• Switch travel: 0.15mm
• Mechanical life: 100,000 Cycles

Allowable Variation Parameters:

• Actuator height off PCB (vertical)
• Operating force
• Ingress protection rating
• Moisture sensitivity level
• Product status

The LS70C2S-T qualifies as a substitute part because it maintains all mandatory matching parameters while offering enhanced environmental protection and different mechanical specifications within acceptable tolerances for the LS70 series.

Parameter Comparison

Engineering Selection Recommendations

LS70C2-T (Obsolete): The LS70C2-T is no longer in active production. While 45,400 units remain in inventory as new original stock, this part number should not be selected for new designs or long-term production commitments due to its obsolete status.

LS70C2S-T (Active Substitute): The LS70C2S-T is the recommended substitute for the LS70C2-T. This part maintains identical electrical specifications (SPST-NO, 0.02A @ 12VDC) and mechanical compatibility (2.80mm x 2.30mm outline, 0.15mm switch travel, 100,000 cycle life). The LS70C2S-T is currently in active production with 19,125 units available as new original stock.

Key Advantages of LS70C2S-T:

• Active product status ensures long-term availability
• IP67 ingress protection rating provides enhanced environmental sealing
• Operating force of 163gf is within acceptable tolerance of the original 160gf specification
• Increased actuator height (0.60mm vs. 0.35mm) accommodates applications requiring greater tactile feedback clearance
• Both parts maintain RoHS compliance and identical export classification (EAR99)

Compatibility Considerations: The primary design consideration is the increased actuator height of 0.60mm on the LS70C2S-T compared to 0.35mm on the LS70C2-T. Applications with tight vertical clearance constraints must account for this 0.25mm difference. The operating force differential of 3gf (160gf to 163gf) is negligible for momentary switch applications.

Frequently Asked Questions (FAQ)

Q: Can the LS70C2S-T be used as a direct replacement for the LS70C2-T in existing PCB designs?

A: The LS70C2S-T is electrically and mechanically compatible with the LS70C2-T for the same footprint (2.80mm x 2.30mm) and termination style (SMD Tab). However, the increased actuator height (0.60mm vs. 0.35mm) must be verified against enclosure clearance specifications. If vertical space is constrained to 0.35mm or less, the LS70C2S-T will not fit without design modification.

Q: What is the difference in ingress protection between these two parts?

A: The LS70C2-T has no specified ingress protection rating. The LS70C2S-T provides IP67 protection, meaning it is dust tight and can withstand temporary immersion in water. This enhancement makes the LS70C2S-T suitable for applications exposed to moisture or contamination.

Q: Are there any compliance or certification differences?

A: Both parts are RoHS compliant and classified under ECCN EAR99. The moisture sensitivity level differs: LS70C2-T is MSL 1 (unlimited shelf life), while LS70C2S-T is MSL 2A (4-week shelf life from bag opening). This affects storage and handling procedures but does not impact functional performance.

Q: What is the operating force difference, and does it affect switch feel?

A: The operating force increases from 160gf to 163gf, a difference of 3gf. This 1.9% variation is imperceptible in momentary switch applications and falls within normal manufacturing tolerances for tactile switches.

Q: Why is the LS70C2-T listed as obsolete?

A: The LS70C2-T has been superseded by the LS70C2S-T in Citizen's product line. The newer variant offers enhanced environmental protection (IP67) while maintaining identical electrical and core mechanical specifications. Obsolete status indicates the manufacturer no longer produces this part number for new orders.

Q: Can I mix LS70C2-T and LS70C2S-T components in the same production batch?

A: Both parts are functionally equivalent for electrical operation. However, mixing parts with different actuator heights (0.35mm vs. 0.60mm) in the same assembly may create inconsistent tactile feedback and appearance. For consistency, use a single part number per production run.

Q: What is the switch travel specification, and is it identical between both parts?

A: Both the LS70C2-T and LS70C2S-T have a switch travel of 0.15mm. This is the distance the actuator moves from the rest position to full depression and is identical across both variants.

Q: Are these parts suitable for high-reliability applications?

A: Both parts support 100,000 mechanical cycles, which is standard for tactile switches in consumer and industrial applications. For applications requiring higher cycle counts or extended operational life, alternative switch families should be evaluated.