KC57B10.001NLS Rotary Switch - Equivalent & Substitute Parts

Part Overview

The KC57B10.001NLS is a 4-position rotary switch manufactured by E-Switch, rated for 350mA AC at 125 VAC with panel mount configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The switch features a single-pole, four-throw (SP4T) circuit with non-shorting contact timing and silver-plated copper alloy contacts.

Substiute Parts

KC57B10.001NLS

E-SwitchIn Stock: 1120KC57B10.001NLS Datasheet

Current PartRFQ

A10405RNZQ

C&KIn Stock: 899A10405RNZQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KC57B10.001NLS is determined by the following critical parameters:

• Circuit Configuration: Must be SP4T (4-position, single-pole, four-throw)
• Voltage Rating: Must support minimum 125 VAC
• Current Rating: Must support minimum 350mA AC
• Contact Timing: Must be non-shorting (BBM)
• Mounting Interface: Must be panel mount with 9.80mm circular cutout
• Termination: Must use solder lug termination
• Compliance: Must maintain ROHS3 compliance

The substitute part A10405RNZQ meets all mandatory electrical and mechanical parameters while offering enhanced current capacity (2.5A AC) and dual voltage support (125 VAC/DC). The mechanical interface remains compatible with the original specification.

Parameter Comparison

Engineering Selection Recommendations

The A10405RNZQ is a direct functional substitute for the KC57B10.001NLS. Both components maintain identical electrical specifications for the 125 VAC, 350mA AC application. The substitute offers superior current capacity (2.5A AC versus 350mA AC) and extended voltage support (125 VDC capability), providing design flexibility for future applications without circuit modification.

Both parts maintain ROHS3 compliance and identical panel mount interface dimensions (9.80mm cutout). The substitute's active product status ensures long-term availability and supply chain continuity, addressing the obsolescence of the original component.

The increased depth behind panel (20.83mm versus 18.50mm) must be verified against available mounting space in the target application. All other mechanical and electrical parameters are compatible.

Frequently Asked Questions (FAQ)

Q: Can the A10405RNZQ directly replace the KC57B10.001NLS in existing designs?

A: Yes. Both components share identical circuit configuration (SP4T), voltage rating (125 VAC), current rating (350mA AC minimum), contact timing (non-shorting), panel mount interface (9.80mm cutout), and termination style (solder lug). The substitute's higher current capacity does not affect compatibility.

Q: What is the difference in panel depth between these components?

A: The KC57B10.001NLS has a depth of 18.50mm behind the panel, while the A10405RNZQ measures 20.83mm. This 2.33mm difference must be accommodated in the enclosure design. Verify available mounting depth before selection.

Q: Does the A10405RNZQ support DC voltage applications?

A: Yes. The A10405RNZQ is rated for 125 VDC in addition to 125 VAC, with 350mA DC current capability. The original KC57B10.001NLS does not specify DC voltage support.

Q: Are both components RoHS compliant?

A: Yes. Both the KC57B10.001NLS and A10405RNZQ are ROHS3 compliant and REACH unaffected.

Q: What is the packaging difference?

A: The KC57B10.001NLS is supplied in standard packaging, while the A10405RNZQ is supplied in trays. Verify packaging requirements for your procurement and assembly processes.

Q: Why is the original component obsolete?

A: The KC57B10.001NLS is classified as obsolete by E-Switch. The A10405RNZQ maintains active product status, ensuring continued availability and manufacturing support.