Equivalent & Substitute Parts for Honeywell 4SX87-T Snap Action Switch

Part Overview

The Honeywell 4SX87-T is a snap action switch with Single Pole Double Throw (SPDT) circuit configuration, rated for 7A at 250V AC and 28V DC. This component features a round pin plunger actuator and chassis mount termination with solder turret connections. The 4SX87-T is classified as obsolete, making identification of equivalent active alternatives essential for ongoing system support and new design implementations.

Substiute Parts

4SX87-T

Honeywell Sensing and Productivity SolutionsIn Stock: 9034SX87-T Datasheet

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1SX1-T

Honeywell Sensing and Productivity SolutionsIn Stock: 10801SX1-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 4SX87-T is based on electrical and mechanical parameter equivalence within the Honeywell SX series snap action switch family. The primary substitute identified is the 1SX1-T, which maintains identical electrical ratings and mechanical specifications across all critical parameters that define functional compatibility.

The substitution logic is based on the following key parameters:

• Circuit Configuration: Both parts are SPDT with On-Momentary function
• Electrical Ratings: Identical current (7A AC/DC) and voltage ratings (250V AC, 28V DC)
• Mechanical Characteristics: Matching actuator type (round pin plunger), mounting method (chassis mount), and termination style (solder turret)
• Actuation Parameters: Identical operating force (141gf), release force (28gf), and travel specifications
• Mechanical Life: Both rated for 1,000,000 cycles
• Environmental Compliance: Both RoHS compliant with MSL 1 rating

The primary distinction between these parts is product status: the 4SX87-T is obsolete while the 1SX1-T is active, and a difference in maximum operating temperature range (4SX87-T: -55°C to 204°C; 1SX1-T: -55°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

The 1SX1-T serves as the direct functional equivalent to the obsolete 4SX87-T for applications operating within the -55°C to 125°C temperature range. Both components share identical electrical ratings, mechanical specifications, and actuation characteristics, ensuring pin-for-pin and functionally equivalent operation in circuit implementations.

For applications requiring operation above 125°C and up to 204°C, the 4SX87-T's extended temperature capability cannot be matched by the 1SX1-T. In such cases, alternative component evaluation outside the SX series may be necessary.

The 1SX1-T is the recommended substitute based on active product status and current manufacturing availability. Both components maintain RoHS compliance and MSL 1 moisture sensitivity rating, supporting deployment in standard industrial and commercial environments.

Frequently Asked Questions (FAQ)

Q: Can the 1SX1-T directly replace the 4SX87-T in existing designs?

A: The 1SX1-T is electrically and mechanically equivalent to the 4SX87-T for applications within the -55°C to 125°C operating temperature range. Both components feature identical SPDT circuit configuration, 7A current rating at 250V AC and 28V DC, round pin plunger actuator, chassis mount configuration, and solder turret termination. Direct substitution is supported for designs not exceeding 125°C maximum operating temperature.

Q: What is the temperature limitation when substituting with the 1SX1-T?

A: The 4SX87-T operates from -55°C to 204°C, while the 1SX1-T operates from -55°C to 125°C. The 1SX1-T has a reduced maximum operating temperature of 79°C lower than the original part. Applications requiring sustained operation above 125°C require evaluation of alternative components.

Q: Are the mechanical actuation characteristics identical between these parts?

A: Yes. Both the 4SX87-T and 1SX1-T share identical operating force (141gf), release force (28gf), operating position (0.320"/8.13mm), pretravel (0.020"/0.5mm), differential travel (0.005"/0.13mm), and overtravel (0.004"/0.1mm) specifications. Mechanical life is rated at 1,000,000 cycles for both components.

Q: What is the difference in packaging between these parts?

A: The 4SX87-T packaging specification is not provided in the technical data. The 1SX1-T is supplied in tray packaging. Packaging differences do not affect electrical or mechanical performance but may impact procurement, handling, and storage procedures.

Q: Are both parts RoHS compliant?

A: Yes. The 4SX87-T is RoHS Compliant, and the 1SX1-T is ROHS3 Compliant. Both components meet RoHS environmental compliance requirements. The 1SX1-T carries additional REACH Unaffected status.

Q: What is the product status difference, and why does it matter?

A: The 4SX87-T is classified as obsolete, indicating it is no longer in active production. The 1SX1-T is classified as active, indicating current manufacturing and availability. For new designs and ongoing system support, the active 1SX1-T is the appropriate selection.