Equivalent & Substitute Parts for Honeywell 4SX1-T2 Snap Action Switch

Part Overview

The Honeywell 4SX1-T2 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 via solder turret. The 4SX1-T2 is classified as obsolete, necessitating identification of equivalent active alternatives to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

4SX1-T2

Honeywell Sensing and Productivity SolutionsIn Stock: 7104SX1-T2 Datasheet

Current PartRFQ

1SX1-T

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 4SX1-T2 is based on strict electrical and mechanical parameter equivalence within the Honeywell SX series. The substitute part 1SX1-T maintains identical specifications across all critical functional parameters: SPDT circuit, 7A current rating, 250V AC and 28V DC voltage ratings, round pin plunger actuator, chassis mount configuration, and solder turret termination. Both parts share identical operating force (141gf), release force (28gf), operating position (0.320"), pretravel, differential travel, and overtravel specifications. Mechanical life rating of 1,000,000 cycles is equivalent. The primary distinction is product status: 4SX1-T2 is obsolete while 1SX1-T is active, with 1SX1-T available in tray packaging. Operating temperature range differs slightly (1SX1-T: -55°C to 125°C versus 4SX1-T2: -55°C to 204°C), and RoHS compliance status varies (1SX1-T: ROHS3 Compliant versus 4SX1-T2: RoHS Compliant).

Parameter Comparison

Engineering Selection Recommendations

The 1SX1-T snap action switch is the direct functional equivalent for the obsolete 4SX1-T2. All electrical and mechanical parameters are identical, including circuit configuration, current and voltage ratings, actuator geometry, mounting configuration, and termination method. The 1SX1-T is actively manufactured and available in production quantities, eliminating supply chain risk associated with the obsolete 4SX1-T2.

For applications operating within the temperature range of -55°C to 125°C, the 1SX1-T provides complete functional substitution. Applications requiring operation above 125°C up to 204°C must evaluate alternative solutions, as the 1SX1-T operating temperature maximum is reduced compared to the original 4SX1-T2 specification.

The 1SX1-T meets current RoHS3 compliance requirements, providing regulatory advantage over the legacy 4SX1-T2. Both components share identical moisture sensitivity level (MSL 1), export classification (EAR99), and tariff codes (HTSUS 8536.50.7000).

Frequently Asked Questions (FAQ)

Q: Can the 1SX1-T directly replace the 4SX1-T2 in existing designs?

A: Yes, for applications within the -55°C to 125°C operating temperature range. The 1SX1-T maintains identical electrical ratings (7A at 250V AC, 28V DC), circuit configuration (SPDT), actuator type (round pin plunger), mounting method (chassis mount), and termination style (solder turret). All mechanical parameters including operating force, release force, and travel specifications are equivalent.

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

A: The 4SX1-T2 is obsolete with a maximum operating temperature of 204°C, while the 1SX1-T is an active product with a maximum operating temperature of 125°C. The 1SX1-T is supplied in tray packaging versus bulk packaging for the 4SX1-T2. Both meet RoHS compliance, though 1SX1-T meets the current ROHS3 standard.

Q: Are there packaging considerations when switching from 4SX1-T2 to 1SX1-T?

A: Yes. The 4SX1-T2 is supplied in bulk packaging, while the 1SX1-T is supplied in tray packaging. This affects receiving, storage, and handling procedures but does not impact electrical or mechanical performance.

Q: What applications are unsuitable for the 1SX1-T substitute?

A: Applications requiring continuous operation above 125°C are unsuitable for the 1SX1-T, as its maximum operating temperature is limited to 125°C compared to the 4SX1-T2 specification of 204°C. Alternative component selection is required for high-temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. The 4SX1-T2 is RoHS Compliant, and the 1SX1-T is ROHS3 Compliant. The 1SX1-T meets the current RoHS3 standard, providing regulatory advantage for new designs and production.

Q: Is the 1SX1-T available in sufficient quantities?

A: Yes. The 1SX1-T is an active product with 996 pieces available in new original stock, compared to 641 pieces of the obsolete 4SX1-T2. The active status ensures ongoing availability for production and field service requirements.