AM51133C43N-A Equivalent & Substitute Parts

Part Overview

The AM51133C43N-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 component is rated for 11A AC at 125V and features a straight lever actuator with quick connect termination. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and design continuity in applications requiring SPST-NO snap-action switching at these electrical specifications.

Substiute Parts

AM51133C43N-A

Panasonic Electric WorksIn Stock: 1176AM51133C43N-A Datasheet

Current PartRFQ

LS0851503F040C1C

E-SwitchIn Stock: 1063LS0851503F040C1C Datasheet

SimilarRFQ

TFCGK6ST1840Y

C&KIn Stock: 708TFCGK6ST1840Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AM51133C43N-A is determined by the following critical parameters:

• Circuit configuration must be SPST-NO
• Switch function must be Off-Mom (momentary operation)
• Actuator type must be lever with straight configuration
• Mounting type must be chassis mount
• Termination style must be quick connect 0.187" (4.7mm)
• Current rating must meet or exceed 11A AC at 125V
• Voltage rating must support minimum 125V AC operation
• Physical form factor must accommodate the operating position and travel specifications

Two substitute parts meet these criteria with varying degrees of parameter alignment:

LS0851503F040C1C (E-Switch): Exceeds current rating at 15A AC, maintains 125V AC voltage specification, and shares identical actuator, mounting, and termination characteristics. Operating position and pretravel are equivalent within engineering tolerance.

TFCGK6ST1840Y (C&K): Matches 11A AC current rating, exceeds voltage capability at 277V AC, and maintains identical actuator, mounting, and termination specifications. Operating position is equivalent; pretravel and differential travel differ slightly but remain within functional parameters.

Parameter Comparison

Engineering Selection Recommendations

LS0851503F040C1C (E-Switch) is suitable for direct replacement in applications operating at 125V AC where the original 11A current requirement can be satisfied by the higher 15A rating. This part is currently in active production status and carries RoHS3 compliance certification. The operating temperature range is reduced to 85°C maximum, which may be a limiting factor in high-temperature environments. Electrical life is reduced to 50,000 cycles compared to the original 100,000 cycles.

TFCGK6ST1840Y (C&K) is suitable for replacement in applications where higher AC voltage capability (277V) is beneficial or required. This part maintains the original 11A AC current rating and is in active production status with RoHS3 compliance. The extended operating temperature range to -40°C provides improved low-temperature performance. REACH status indicates this part is affected by REACH regulations. Electrical and mechanical life specifications are not provided for this component.

Selection between substitutes depends on application voltage requirements, temperature operating envelope, and cycle life expectations. Both parts maintain functional equivalence in circuit configuration, actuator design, and physical mounting characteristics.

Frequently Asked Questions (FAQ)

Q: Can LS0851503F040C1C replace AM51133C43N-A in all applications?

A: LS0851503F040C1C is functionally equivalent for applications operating at 125V AC. The higher current rating (15A vs. 11A) does not prevent substitution. However, the reduced maximum operating temperature (85°C vs. 105°C) and lower electrical life rating (50,000 vs. 100,000 cycles) must be evaluated against application requirements.

Q: What is the primary difference between the two substitute parts?

A: LS0851503F040C1C is optimized for 125V AC operation with higher current capacity. TFCGK6ST1840Y is rated for higher AC voltage (277V) while maintaining the original 11A current rating. Both share identical mechanical and electrical interface characteristics.

Q: Are the quick connect terminations physically compatible?

A: Yes. All three parts use Quick Connect - 0.187" (4.7mm) termination, ensuring direct mechanical and electrical compatibility with existing connector systems.

Q: How do operating position and pretravel differences affect substitution?

A: Operating position values are equivalent within engineering tolerance (0.600" to 0.602"). Pretravel variations (0.296" to 0.335") are minor and do not affect functional operation in standard snap-action switch applications. These parameters determine actuation feel and may be relevant only in applications with specific mechanical constraints.

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

A: Neither substitute part extends the operating temperature range above the original specification. The original AM51133C43N-A operates to 105°C, while both substitutes are limited to 85°C maximum. For applications requiring operation above 85°C, alternative components outside this substitute group must be evaluated.

Q: Are both substitute parts currently available?

A: Yes. LS0851503F040C1C (E-Switch) and TFCGK6ST1840Y (C&K) are both in active production status with documented inventory availability.