LSK1A-8C Equivalent & Substitute Parts Reference

Part Overview

The LSK1A-8C is an active-status snap action switch manufactured by Honeywell Sensing and Productivity Solutions. This SPDT (Single Pole Double Throw) switch is configured for chassis mount installation with plug-in termination, rated for 10A AC at 120V and 800mA DC at 115V. The switch operates with a spring and coil actuator mechanism, delivering an operating force of 198gf with a pretravel distance of 2.000" (50.8mm). Current inventory includes 931 pieces in new original condition.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and circuit configuration can be maintained across different manufacturers while meeting application requirements.

Substiute Parts

LSK1A-8C

Honeywell Sensing and Productivity SolutionsIn Stock: 961LSK1A-8C Datasheet

Current PartRFQ

D4A-1124N

Omron Automation and SafetyIn Stock: 798D4A-1124N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The D4A-1124N manufactured by Omron Automation and Safety qualifies as a substitute for the LSK1A-8C based on the following substitution criteria:

Matching Electrical Parameters:

• Identical circuit configuration: SPDT (DB/DM)
• Identical switch function: On-Momentary
• Equivalent current rating: 10A AC (D4A-1124N rated 10A AC versus LSK1A-8C rated 10A AC)
• Equivalent voltage rating: 125V AC (D4A-1124N) exceeds 120V AC requirement (LSK1A-8C)

Matching Mechanical Parameters:

• Identical mounting type: Chassis Mount
• Compatible actuator mechanism: Spring-based actuation
• Both configured for industrial snap action switching applications

Matching Compliance & Handling:

• Identical RoHS Compliance status
• Identical Moisture Sensitivity Level: MSL 1 (Unlimited)
• Identical ECCN and HTSUS classifications

Substitution Limitations: The D4A-1124N differs in termination style (Screw Terminal versus Plug In), DC voltage rating (30V DC versus 115V DC), and DC current rating (6A DC versus 800mA DC). These differences require circuit-level evaluation for DC applications. The D4A-1124N provides enhanced environmental protection (IP67 rating) and extended operating temperature range (-20°C to 100°C versus -12°C to 93°C).

Parameter Comparison

Engineering Selection Recommendations

For AC Applications (120V, 10A): The D4A-1124N is suitable as a direct substitute for the LSK1A-8C in AC-only circuits. Both parts maintain identical current and voltage performance within the specified AC operating envelope. The D4A-1124N's higher AC voltage rating (125V) provides additional margin. Termination style conversion from plug-in to screw terminal requires mechanical interface modification.

For DC Applications (115V, 800mA): The D4A-1124N is not suitable for DC applications requiring 115V operation, as its DC voltage rating is limited to 30V. The LSK1A-8C must be retained for DC circuits operating at 115V. For DC applications below 30V, the D4A-1124N's 6A DC rating exceeds the LSK1A-8C's 800mA requirement.

For Environmental Conditions: The D4A-1124N provides superior environmental protection with IP67 ingress protection rating and extended operating temperature range (-20°C to 100°C). Selection of the D4A-1124N is appropriate for applications requiring enhanced moisture and dust resistance or operation outside the LSK1A-8C's temperature envelope.

For Compliance and Handling: Both parts maintain identical RoHS compliance and MSL 1 moisture sensitivity classification, ensuring equivalent supply chain handling and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the D4A-1124N replace the LSK1A-8C in all applications?

A: No. The D4A-1124N is suitable for AC applications and DC applications below 30V. For DC applications at 115V, the LSK1A-8C must be used. Termination style differences (plug-in versus screw terminal) require mechanical interface evaluation.

Q: What is the primary difference between these two switches?

A: The primary difference is DC voltage rating. The LSK1A-8C supports 115V DC operation, while the D4A-1124N is limited to 30V DC. AC performance is equivalent at 10A and 120V/125V respectively.

Q: Does the D4A-1124N offer any advantages over the LSK1A-8C?

A: Yes. The D4A-1124N provides IP67 ingress protection (versus unspecified for LSK1A-8C), extended operating temperature range (-20°C to 100°C versus -12°C to 93°C), and documented electrical life rating of 1,000,000 cycles.

Q: Are both parts RoHS compliant?

A: Yes. Both the LSK1A-8C and D4A-1124N are RoHS compliant with identical MSL 1 moisture sensitivity classification.

Q: What termination modifications are required when substituting the D4A-1124N?

A: The LSK1A-8C uses plug-in termination while the D4A-1124N uses screw terminal termination. Circuit board or connector interface modifications are required to accommodate the different termination style.

Q: Which part should be selected for high-temperature applications?

A: The D4A-1124N supports operation up to 100°C, exceeding the LSK1A-8C's 93°C maximum. For applications requiring operation above 93°C, the D4A-1124N is the appropriate selection.

Q: Is the D4A-1124N suitable for wet or dusty environments?

A: Yes. The D4A-1124N carries an IP67 ingress protection rating, indicating dust-tight and waterproof performance. The LSK1A-8C ingress protection rating is not specified.