1SM23-T2 Equivalent & Substitute Parts Reference

Part Overview

The 1SM23-T2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is designed for applications requiring single-pole double-throw functionality with a 1A current rating at 125V AC and 30V DC. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the 1SM23-T2 reaches end-of-life status, when inventory constraints occur, or when alternative sourcing is required for supply chain optimization. The substitute parts listed maintain functional equivalence within the specified electrical and mechanical parameters.

Substiute Parts

1SM23-T2

Honeywell Sensing and Productivity SolutionsIn Stock: 12351SM23-T2 Datasheet

Current PartRFQ

DB1C-A1AA

Hirose Electric Co LtdIn Stock: 919DB1C-A1AA Datasheet

SimilarRFQ

DC1C-A1AA

ZF ElectronicsIn Stock: 21897DC1C-A1AA Datasheet

SimilarRFQ

DC3C-A1AA

Hirose Electric Co LtdIn Stock: 1171DC3C-A1AA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1SM23-T2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Actuator type must be Round (Pin Plunger)
• Mounting type must be Chassis Mount
• Current rating must support minimum 1A at 125V AC
• Voltage rating must meet or exceed 125V AC and 30V DC specifications

Secondary Compatibility Factors:

• Operating position tolerance (0.330" ± acceptable variance)
• Operating temperature range must encompass -55°C to 125°C or be compatible with application requirements
• Termination style compatibility with circuit board design
• Mechanical life rating of 80,000 cycles minimum

The three substitute parts listed (DB1C-A1AA, DC1C-A1AA, DC3C-A1AA) have been identified as functionally equivalent based on matching circuit topology, actuator configuration, and mounting methodology.

Parameter Comparison

Engineering Selection Recommendations

DC1C-A1AA (ZF Electronics) - Preferred Active Substitute

The DC1C-A1AA is the recommended substitute when 1SM23-T2 availability is constrained. This part maintains active product status, ensuring continued manufacturer support and supply chain stability. It shares identical operating position (0.330"), circuit configuration (SPDT), switch function (On-Momentary), actuator type (Round Pin Plunger), and mounting methodology (Chassis Mount). The DC1C-A1AA exceeds the 1SM23-T2 specifications in current capacity (5A AC versus 1A AC) and DC voltage rating (48V versus 30V), providing enhanced performance margin. Mechanical life rating of 1,000,000 cycles substantially exceeds the 1SM23-T2 specification of 80,000 cycles. Both parts carry identical ECCN (EAR99) and HTSUS classifications. ROHS3 compliance of the DC1C-A1AA meets or exceeds RoHS requirements. The primary design consideration is termination style difference: DC1C-A1AA uses Solder Lug termination versus 1SM23-T2 Solder Turret termination, requiring circuit board layout verification.

DB1C-A1AA (Hirose Electric Co Ltd) - Obsolete Status

The DB1C-A1AA carries obsolete product status, indicating discontinued manufacturing and limited future availability. Detailed electrical and mechanical specifications are not provided in available documentation. This part should be selected only when existing inventory is available and long-term supply is not required.

DC3C-A1AA (Hirose Electric Co Ltd) - Obsolete Status

The DC3C-A1AA carries obsolete product status with discontinued manufacturing. Detailed electrical and mechanical specifications are not provided. This part should be selected only when existing inventory is available and long-term supply is not required.

Frequently Asked Questions (FAQ)

Q: Can DC1C-A1AA directly replace 1SM23-T2 in all applications?

A: DC1C-A1AA maintains functional equivalence in circuit topology, actuator type, and mounting configuration. The primary design consideration is termination style: DC1C-A1AA uses Solder Lug termination while 1SM23-T2 uses Solder Turret termination. Circuit board layout and solder pad design must accommodate this difference. DC1C-A1AA specifications exceed 1SM23-T2 requirements in current capacity and voltage rating, making it suitable for equivalent or higher-performance applications.

Q: What is the significance of the obsolete product status for DB1C-A1AA and DC3C-A1AA?

A: Obsolete status indicates the manufacturer has discontinued production. These parts should be selected only when existing inventory is available from authorized distributors. Long-term supply cannot be guaranteed. For new designs or applications requiring sustained component availability, active products such as DC1C-A1AA are recommended.

Q: Are all substitute parts RoHS compliant?

A: The 1SM23-T2 is RoHS Compliant. DC1C-A1AA is ROHS3 Compliant, which meets or exceeds RoHS requirements. DB1C-A1AA and DC3C-A1AA do not have specified RoHS status in available documentation. Compliance verification is required before selection for applications with RoHS mandates.

Q: How do operating temperature ranges compare?

A: The 1SM23-T2 operates from -55°C to 125°C. DC1C-A1AA operates from -40°C to 120°C. For applications requiring operation below -40°C or above 120°C, the 1SM23-T2 provides extended temperature capability. For standard industrial temperature ranges, DC1C-A1AA is suitable.

Q: What is the difference in mechanical life ratings?

A: The 1SM23-T2 is rated for 80,000 mechanical cycles. DC1C-A1AA is rated for 1,000,000 mechanical cycles, providing substantially higher cycle life. For high-cycle applications, DC1C-A1AA offers superior durability. For standard-duty applications, both parts meet requirements.

Q: How does current rating affect substitution?

A: The 1SM23-T2 is rated for 1A AC/DC at 125V AC and 30V DC. DC1C-A1AA is rated for 5A AC and 1A DC at 125V AC and 48V DC. DC1C-A1AA can handle higher AC current loads while maintaining DC current equivalence. For applications requiring only 1A AC, both parts are suitable. For applications requiring higher AC current, DC1C-A1AA is required.

Q: What packaging considerations apply to these substitutes?

A: The 1SM23-T2 packaging is not specified. DC1C-A1AA is supplied in Bulk packaging. DB1C-A1AA and DC3C-A1AA packaging is not specified. Packaging format may affect procurement quantities and handling procedures. Verify packaging compatibility with receiving and assembly processes.

Q: Are all parts classified under the same HTSUS and ECCN codes?

A: All parts listed share identical HTSUS code 8536.50.7000 and ECCN classification EAR99. This ensures consistent tariff treatment and export control compliance across all substitute options.