AM51166C43N-A Equivalent & Substitute Parts

Part Overview

The AM51166C43N-A is a snap-action switch manufactured by Panasonic Electric Works, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device with chassis mount installation. This switch is rated for 11A AC at 125V and 600mA DC at 125V, featuring a lever roller actuator with quick connect termination. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and component sourcing.

Substiute Parts

AM51166C43N-A

Panasonic Electric WorksIn Stock: 872AM51166C43N-A Datasheet

Current PartRFQ

83264847

CrouzetIn Stock: 104983264847 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AM51166C43N-A is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPST-NO
• Switch function must be Off-Mom (momentary operation)
• Actuator type must include lever and roller configuration
• Mounting type must be chassis mount
• Termination style must be quick connect 0.187" (4.7mm)

Electrical Performance Criteria:

• AC current rating must meet or exceed 11A
• AC voltage rating must meet or exceed 125V
• Mechanical and electrical life specifications must support the intended application duty cycle

The Crouzet 83264847 satisfies all primary compatibility criteria. It maintains identical circuit configuration (SPST-NO), switch function (Off-Mom), actuator type (lever, roller), mounting type (chassis mount), and termination style (quick connect 0.187"). The electrical ratings exceed the original specification: 12A AC at 250V provides superior current and voltage capacity compared to the 11A at 125V rating of the AM51166C43N-A.

Parameter Comparison

Engineering Selection Recommendations

The Crouzet 83264847 is a direct functional substitute for the AM51166C43N-A. Both switches share identical circuit topology, actuator configuration, and termination interface. The Crouzet part offers enhanced electrical ratings (12A AC at 250V versus 11A AC at 125V), providing additional margin for circuit protection and system reliability.

The Crouzet 83264847 carries active product status with RoHS compliance certification, ensuring long-term availability and regulatory alignment with current manufacturing standards. The AM51166C43N-A, classified as obsolete, presents sourcing constraints for new applications and ongoing system support.

Operating temperature range differs slightly: the Crouzet part extends to 125°C maximum versus 105°C for the Panasonic part, offering broader thermal operating envelope. Mechanical life specification for the Crouzet part (1,000,000 cycles) is lower than the Panasonic original (10,000,000 cycles); however, this remains adequate for typical momentary switch applications.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 83264847 directly replace the AM51166C43N-A in existing assemblies?

A: Yes. Both switches share identical SPST-NO circuit configuration, Off-Mom function, lever-roller actuator type, chassis mount installation, and 0.187" quick connect termination. Physical dimensions are equivalent (operating position 20.7mm versus 20.5mm). No circuit redesign or mechanical modification is required.

Q: What are the key electrical differences between these two switches?

A: The Crouzet part is rated for 12A AC at 250V, compared to the Panasonic part at 11A AC at 125V. This represents a higher current capacity and voltage rating, making the Crouzet part suitable for applications requiring the original specifications and those with higher electrical demands within the same circuit topology.

Q: Does the lower mechanical life rating of the Crouzet part affect suitability?

A: The Crouzet part specifies 1,000,000 mechanical cycles versus 10,000,000 for the Panasonic original. For momentary switch applications with typical duty cycles, 1,000,000 cycles provides adequate operational life. Applications requiring extended cycle counts should evaluate specific duty cycle requirements against this specification.

Q: Are there compliance or certification differences?

A: The Crouzet 83264847 is RoHS compliant and carries active product status. The AM51166C43N-A is classified as obsolete with no specified RoHS status. For new designs or systems requiring current regulatory compliance, the Crouzet part is the appropriate selection.

Q: What is the operating temperature difference, and does it matter?

A: The Crouzet part operates from -20°C to 125°C, while the Panasonic part operates from -25°C to 105°C. The Crouzet part offers a higher maximum temperature rating (125°C versus 105°C) but a slightly higher minimum temperature limit (-20°C versus -25°C). For most industrial applications, this difference is not significant; however, systems operating below -20°C should retain the original Panasonic specification if available.