AM1743K Equivalent & Substitute Parts Reference

Part Overview

The AM1743K is a snap action SPDT switch manufactured by Panasonic Electric Works, designed for chassis mount applications with a 10A AC / 500mA DC current rating at 125V. The switch features a lever roller actuator and screw terminal connections, suitable for on-momentary switching operations. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

AM1743K

Panasonic Electric WorksIn Stock: 1000AM1743K Datasheet

Current PartRFQ

BZ-2RW826-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 827BZ-2RW826-A2 Datasheet

DirectRFQ

1HT1

Honeywell Sensing and Productivity SolutionsIn Stock: 8401HT1 Datasheet

SimilarRFQ

BZ-RQX66

Honeywell Sensing and Productivity SolutionsIn Stock: 1027BZ-RQX66 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AM1743K is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom
• Voltage rating must support 125V AC minimum
• Mounting type must be chassis mount
• Termination style must be screw terminal
• Current rating must meet or exceed 10A AC / 500mA DC

Direct Substitute (Meets All Primary Criteria): BZ-2RW826-A2 satisfies all primary compatibility requirements with enhanced electrical and mechanical life specifications.

Similar Parts (Partial Parameter Deviation): 1HT1 and BZ-RQX66 deviate from primary criteria in mounting type, current rating, or switch function, limiting their direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

BZ-2RW826-A2 is the direct substitute for AM1743K. This part maintains identical circuit configuration, switch function, voltage rating, actuator type, mounting type, and termination style. The BZ-2RW826-A2 provides enhanced specifications with 15A AC current capacity (exceeding the 10A requirement), extended operating temperature range (-55°C to 85°C versus -25°C to 80°C), and significantly improved mechanical life (20,000,000 cycles versus 5,000,000 cycles). The part carries active product status and RoHS compliance certification, supporting long-term availability and regulatory requirements.

1HT1 and BZ-RQX66 are not suitable direct replacements. 1HT1 deviates in mounting type (panel mount versus chassis mount), current rating (3A versus 10A), and actuator type (round pin plunger versus lever roller). BZ-RQX66 deviates in mounting type (panel mount versus chassis mount) and switch function (On-On versus On-Mom), despite matching current and voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can BZ-2RW826-A2 directly replace AM1743K in existing designs? A: Yes. BZ-2RW826-A2 maintains all critical electrical and mechanical parameters required for direct substitution, including SPDT circuit, On-Mom function, 125V rating, lever roller actuator, chassis mount configuration, and screw terminal termination. The higher current rating (15A) and extended operating temperature range provide enhanced performance margins.

Q: Why are 1HT1 and BZ-RQX66 listed as similar parts rather than direct substitutes? A: 1HT1 uses panel mount configuration instead of chassis mount and has a reduced current rating of 3A, making it unsuitable for applications requiring 10A capacity. BZ-RQX66 also uses panel mount configuration and features On-On switching function instead of On-Mom, altering the operational behavior required by AM1743K applications.

Q: What is the significance of the operating position and pretravel specifications? A: Operating position (1.625" for AM1743K and BZ-2RW826-A2) and pretravel (0.178" for AM1743K) define the mechanical stroke characteristics. BZ-2RW826-A2 matches these specifications, ensuring compatible mechanical integration into existing enclosures and control mechanisms.

Q: Does BZ-2RW826-A2 meet current regulatory compliance requirements? A: Yes. BZ-2RW826-A2 carries RoHS compliance certification and active product status, supporting current procurement and regulatory requirements. AM1743K, classified as obsolete, may present compliance challenges for new designs or long-term supply continuity.

Q: Are there packaging differences between AM1743K and BZ-2RW826-A2? A: AM1743K is supplied in standard packaging, while BZ-2RW826-A2 is supplied in bulk packaging. Both use identical screw terminal connections and chassis mount configurations, with no functional impact on circuit integration.