D6R40 LFS Equivalent & Substitute Parts

Part Overview

The D6R40 LFS is a pushbutton switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with keyswitch functionality. This through-hole mounted component is rated for 0.1A at 32V DC and features tactile feedback with a red round button actuator. The D6R40 LFS is currently listed as obsolete, making identification of suitable substitute parts essential for ongoing design support and component procurement.

Substiute Parts

D6R40 LFS

C&KIn Stock: 937D6R40 LFS Datasheet

Current PartRFQ

D6R40 F1 LFS

C&KIn Stock: 5793D6R40 F1 LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The D6R40 F1 LFS qualifies as a direct substitute for the D6R40 LFS based on the following critical parameters:

• Electrical Specifications: Both parts maintain identical circuit configuration (SPST-NO), current rating (100mA DC), and voltage rating (32V DC)
• Mechanical Compatibility: Both feature the same mounting type (Through Hole), actuator type (Round, Button), termination style (PC Pin), and operating temperature range (-20°C ~ 85°C)
• Functional Characteristics: Both provide identical switch function (Off-Mom), tactile feedback, and electrical life rating (250,000 Cycles)
• Compliance & Certification: Both maintain RoHS compliance, MSL Level 1, and REACH Unaffected status
• Series Continuity: Both belong to the C&K D6 series

The primary distinction is product status: the D6R40 LFS is obsolete, while the D6R40 F1 LFS is active with significantly higher inventory availability (5704 Pcs vs. 834 Pcs).

Parameter Comparison

Engineering Selection Recommendations

The D6R40 F1 LFS is the appropriate selection for new designs and component replenishment. This part maintains full electrical and mechanical compatibility with the obsolete D6R40 LFS while offering the following advantages:

• Active Product Status: The D6R40 F1 LFS is an active component with manufacturer support and continued availability
• Enhanced Compliance: ROHS3 certification provides updated regulatory alignment compared to the legacy RoHS Compliant designation
• Superior Inventory Position: Significantly higher stock levels (5704 Pcs) ensure reliable procurement for production requirements
• Identical Electrical Performance: All critical electrical parameters (voltage, current, circuit configuration) remain unchanged, ensuring direct functional equivalence

No design modifications are required when transitioning from D6R40 LFS to D6R40 F1 LFS.

Frequently Asked Questions (FAQ)

Q: Can the D6R40 F1 LFS be used as a direct replacement for the D6R40 LFS?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including circuit configuration, voltage and current ratings, mounting type, and actuator characteristics. The D6R40 F1 LFS is the active production equivalent.

Q: What is the difference between the D6R40 LFS and D6R40 F1 LFS?

A: The primary differences are product status (obsolete vs. active), packaging format (bulk vs. tray), and inventory availability. The D6R40 F1 LFS includes updated ROHS3 compliance. All electrical and mechanical specifications are identical.

Q: Are there any design considerations when switching from D6R40 LFS to D6R40 F1 LFS?

A: No design changes are required. Both parts feature identical through-hole mounting, PC pin termination, and functional characteristics. PCB layouts and circuit designs require no modification.

Q: What is the packaging difference between these parts?

A: The D6R40 LFS is supplied in bulk packaging, while the D6R40 F1 LFS is supplied in tray packaging. This affects handling and storage but does not impact electrical or mechanical performance.

Q: Are both parts RoHS compliant?

A: Yes. The D6R40 LFS carries RoHS Compliant certification, while the D6R40 F1 LFS carries the updated ROHS3 Compliant certification. Both meet RoHS requirements.

Q: What is the operating temperature range for these switches?

A: Both the D6R40 LFS and D6R40 F1 LFS operate across the temperature range of -20°C to 85°C.

Q: How many switching cycles are rated for these components?

A: Both parts are rated for 250,000 electrical cycles, providing equivalent operational longevity.