Honeywell 11SM727 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell 11SM727 is a snap action switch with SPDT (Single Pole Double Throw) configuration, rated for 4A at 250V AC and 5A at 30V DC. This component features a round pin plunger actuator and chassis mount design with solder lug termination. The 11SM727 is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. The substitute part 11SM701-T provides functional continuity with identical electrical and mechanical specifications while maintaining current product status.

Substiute Parts

11SM727

Honeywell Sensing and Productivity SolutionsIn Stock: 74611SM727 Datasheet

Current PartRFQ

11SM701-T

Honeywell Sensing and Productivity SolutionsIn Stock: 90411SM701-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 11SM701-T qualifies as a direct substitute for the 11SM727 based on the following critical parameters that determine functional equivalence:

Electrical Parameters (Identical):

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Current rating: 4A (AC), 5A (DC)
• Voltage rating: 250V (AC), 30V (DC)

Mechanical Parameters (Identical):

• Actuator type: Round pin plunger
• Mounting type: Chassis mount
• Operating force: 56gf
• Release force: 14gf
• Operating position: 0.330" (8.4mm)
• Pretravel: 0.020" (0.5mm)
• Differential travel: 0.002" (0.05mm)
• Overtravel: 0.005" (0.13mm)
• Mechanical life: 10,000,000 cycles
• Operating temperature range: -55°C to 125°C

Compliance Parameters (Identical):

• RoHS compliant
• Moisture sensitivity level: 1 (Unlimited)
• ECCN: EAR99
• HTSUS: 8536.50.7000

The primary difference between these parts is the termination style (solder lug versus solder turret) and product status (obsolete versus active).

Parameter Comparison

Engineering Selection Recommendations

The 11SM701-T is the active equivalent for the obsolete 11SM727. Both parts share identical electrical ratings, mechanical characteristics, and compliance certifications. The substitution is valid from an engineering standpoint based on the following factors:

Product Status Consideration: The 11SM727 is classified as obsolete, while the 11SM701-T maintains active product status with current manufacturing support and availability (826 pieces in stock versus 686 pieces for the obsolete part).

Compliance Alignment: Both parts maintain RoHS compliance and identical moisture sensitivity ratings, ensuring regulatory continuity in applications subject to environmental standards.

Termination Difference: The primary distinction is the termination style—solder lug (11SM727) versus solder turret (11SM701-T). This difference requires PCB design or assembly process adjustment but does not affect electrical or mechanical performance. Component selection should account for existing circuit board layout and soldering equipment compatibility.

Functional Equivalence: Identical SPDT circuit configuration, on-momentary switch function, current and voltage ratings, actuator mechanics, and operating temperature range confirm full functional substitution capability.

Frequently Asked Questions (FAQ)

Q: Can the 11SM701-T directly replace the 11SM727 in existing designs?

A: The 11SM701-T provides electrical and mechanical equivalence to the 11SM727. The primary consideration is the termination style difference: solder lug versus solder turret. If the PCB design accommodates solder turret termination, direct substitution is valid. If the design requires solder lug termination, PCB modification or alternative sourcing is necessary.

Q: What is the significance of the product status difference?

A: The 11SM727 is obsolete, meaning Honeywell has discontinued manufacturing and support. The 11SM701-T is active, ensuring continued availability, technical support, and compliance with current manufacturing standards. For new designs or long-term production, the active part is the appropriate selection.

Q: Are the electrical ratings identical between these parts?

A: Yes. Both parts are rated for 4A at 250V AC and 5A at 30V DC. The SPDT circuit configuration and on-momentary switch function are identical. Operating temperature range (-55°C to 125°C) and mechanical life (10,000,000 cycles) are also identical.

Q: What does the termination style difference mean for assembly?

A: Solder lug termination uses a flat tab for through-hole or surface mounting with solder connections. Solder turret termination uses a cylindrical post for similar applications. The choice depends on PCB design, available hole sizes, and soldering equipment. Both provide equivalent electrical connection reliability.

Q: Are both parts RoHS compliant?

A: Yes. Both the 11SM727 and 11SM701-T are RoHS compliant with identical moisture sensitivity level 1 (unlimited). They meet the same environmental and regulatory requirements.

Q: What is the mechanical life specification?

A: Both parts are rated for 10,000,000 mechanical cycles, indicating the expected operational lifespan under normal switching conditions. This specification applies to the actuator mechanism and contact cycling.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. Both parts maintain identical operating temperature specifications from -55°C to 125°C. Temperature-related performance is equivalent between the two parts.