Equivalent & Substitute Parts for Honeywell 23SX78-T2

Part Overview

The Honeywell 23SX78-T2 is a snap action switch with Single Pole Double Throw (SPDT) circuit configuration, rated for 1A at 125V AC and 30V DC. This component features a round pin plunger actuator and chassis mount termination via solder turret. The 23SX78-T2 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

23SX78-T2

Honeywell Sensing and Productivity SolutionsIn Stock: 115723SX78-T2 Datasheet

Current PartRFQ

23SX39-T

Honeywell Sensing and Productivity SolutionsIn Stock: 126823SX39-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 23SX78-T2 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Current rating: 1A (AC/DC)
• Voltage rating: 125V AC / 30V DC

Mechanical Equivalence Criteria:

• Actuator type: Round pin plunger
• Mounting type: Chassis mount
• Termination style: Solder turret
• Operating force: 141gf
• Release force: 28gf
• Operating position: 0.320" (8.13mm)
• Pretravel: 0.020" (0.5mm)
• Differential travel: 0.005" (0.13mm)
• Overtravel: 0.004" (0.1mm)

Environmental Equivalence Criteria:

• Operating temperature range: -53°C to 85°C
• Mechanical life: 1,000,000 cycles
• Moisture sensitivity: MSL 1

The substitute part 23SX39-T meets all specified electrical, mechanical, and environmental parameters and is classified as an active product.

Parameter Comparison

Engineering Selection Recommendations

The 23SX39-T is a direct functional and mechanical equivalent to the obsolete 23SX78-T2. Both components are manufactured by Honeywell Sensing and Productivity Solutions within the SX series and share identical electrical ratings, mechanical specifications, and environmental operating parameters.

The primary distinction is product status: the 23SX78-T2 is obsolete, while the 23SX39-T is active. The 23SX39-T carries ROHS3 compliance certification, representing current regulatory alignment. Both parts maintain MSL 1 moisture sensitivity classification and are suitable for applications requiring snap action switching at 1A, 125V AC operation.

For new designs or ongoing procurement where the 23SX78-T2 is no longer available, the 23SX39-T provides complete electrical and mechanical compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 23SX39-T replace the 23SX78-T2 in existing applications?

A: Yes. The 23SX39-T is electrically and mechanically equivalent to the 23SX78-T2. All critical parameters including current rating, voltage rating, actuator type, mounting configuration, and mechanical travel specifications are identical. No circuit redesign is required.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. The 23SX78-T2 is classified as obsolete, while the 23SX39-T is an active product. The 23SX39-T also carries ROHS3 compliance certification. All functional and mechanical specifications remain identical.

Q: Are there packaging differences between these parts?

A: The 23SX78-T2 is supplied in standard packaging, while the 23SX39-T is supplied in bulk packaging. Both are suitable for solder turret termination and chassis mount installation.

Q: Do both parts meet current regulatory requirements?

A: Both parts are RoHS compliant. The 23SX39-T carries ROHS3 certification, representing the current regulatory standard. Both parts are MSL 1 rated with unlimited moisture sensitivity tolerance.

Q: What is the mechanical life expectancy for these switches?

A: Both the 23SX78-T2 and 23SX39-T are rated for 1,000,000 mechanical cycles, with operating force of 141gf and release force of 28gf.