Equivalent & Substitute Parts for Honeywell 1SX26-C Snap Action Switch

Part Overview

The Honeywell 1SX26-C is an active-status SPDT snap action switch rated for 7A at 250V AC and 28V DC. This through-hole mounted component features a round pin plunger actuator and PC pin termination, designed for applications requiring reliable switching with 1,000,000 mechanical cycle life. The part is RoHS compliant and carries MSL Level 1 classification.

Substitute parts are identified when equivalent electrical ratings, mechanical specifications, and circuit configurations are maintained across the Honeywell SX series product line, ensuring functional interchangeability within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Circuit Configuration	SPDT	—
Current Rating (AC/DC)	7	A
Voltage Rating - AC	250	V
Voltage Rating - DC	28	V
Actuator Type	Round (Pin Plunger)	—
Mounting Type	Through Hole	—
Termination Style	PC Pin	—
Operating Force	141	gf
Mechanical Life	1,000,000	Cycles
RoHS Status	Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

The Honeywell 21SX64 is classified as a substitute for the 1SX26-C based on the following equivalence criteria:

Electrical Equivalence:

Identical SPDT circuit configuration
Matching current rating of 7A (AC/DC)
Identical AC voltage rating of 250V
Identical DC voltage rating of 28V

Mechanical Equivalence:

Identical actuator type: Round (Pin Plunger)
Identical mounting type: Through Hole
Identical termination style: PC Pin
Identical operating force: 141gf
Identical release force: 28gf
Identical pretravel: 0.020" (0.5mm)
Identical differential travel: 0.005" (0.13mm)
Identical overtravel: 0.004" (0.1mm)
Identical mechanical life: 1,000,000 cycles

Compliance Equivalence:

Both RoHS compliant
Both MSL Level 1 (Unlimited)
Both ECCN EAR99 classification
Both HTSUS 8536.50.7000 classification

Noted Variations: Operating position differs by 0.008" (0.23mm) and operating temperature ranges vary, but these variations remain within acceptable substitution parameters for the snap action switch category.

Parameter Comparison

Parameter	1SX26-C (Main Part)	21SX64 (Substitute)	Variance
Manufacturer Part Number	1SX26-C	21SX64	—
Series	SX	SX	None
Product Status	Active	Active	None
Circuit	SPDT	SPDT	None
Switch Function	On-Mom	On-Mom	None
Current Rating (Amps)	7A (AC/DC)	7A (AC/DC)	None
Voltage Rating - AC	250 V	250 V	None
Voltage Rating - DC	28 V	28 V	None
Actuator Type	Round (Pin Plunger)	Round (Pin Plunger)	None
Mounting Type	Through Hole	Through Hole	None
Termination Style	PC Pin	PC Pin	None
Operating Force	141gf	141gf	None
Release Force	28gf	28gf	None
Operating Position	0.312" (7.9mm)	0.320" (8.13mm)	+0.008" (0.23mm)
Pretravel	0.020" (0.5mm)	0.020" (0.5mm)	None
Differential Travel	0.005" (0.13mm)	0.005" (0.13mm)	None
Overtravel	0.004" (0.1mm)	0.004" (0.1mm)	None
Operating Temperature	-55°C ~ 125°C	-53°C ~ 85°C	Range reduction
Mechanical Life	1,000,000 Cycles	1,000,000 Cycles	None
RoHS Status	RoHS Compliant	RoHS Compliant	None
MSL Rating	1 (Unlimited)	1 (Unlimited)	None
ECCN	EAR99	EAR99	None
HTSUS	8536.50.7000	8536.50.7000	None

Engineering Selection Recommendations

Both the 1SX26-C and 21SX64 maintain active product status within the Honeywell SX series and carry identical RoHS compliance and MSL Level 1 certifications. Selection between these parts should be based on application-specific requirements:

Select 1SX26-C when:

Extended operating temperature range of -55°C to 125°C is required
Operating position specification of 0.312" (7.9mm) is critical to mechanical design

Select 21SX64 when:

Operating temperature range of -53°C to 85°C is acceptable
Operating position tolerance of 0.320" (8.13mm) is compatible with mechanical design
Bulk packaging is preferred for production volumes

Both parts satisfy identical electrical specifications (7A at 250V AC / 28V DC), mechanical actuation characteristics (141gf operating force), and lifecycle requirements (1,000,000 cycles). Substitution is valid within the stated parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Can the 21SX64 replace the 1SX26-C in all applications?

A: The 21SX64 is electrically and mechanically equivalent for SPDT switching applications rated at 7A/250V AC and 28V DC. However, verify that the operating temperature range (-53°C to 85°C for 21SX64 versus -55°C to 125°C for 1SX26-C) and operating position tolerance (0.320" versus 0.312") are acceptable for your specific application.

Q: What is the significance of the operating position difference?

A: The operating position specifies the plunger travel distance at which the switch actuates. The 1SX26-C operates at 0.312" (7.9mm) while the 21SX64 operates at 0.320" (8.13mm), a difference of 0.008". This variance must be evaluated against mechanical design constraints and actuator geometry in your application.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1SX26-C and 21SX64 are RoHS compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, suitable for standard PCB assembly and storage conditions.

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

A: The 1SX26-C is supplied with standard packaging, while the 21SX64 is supplied in bulk packaging. Packaging selection depends on production volume requirements and inventory management practices.

Q: Do both parts have identical mechanical life ratings?

A: Yes. Both the 1SX26-C and 21SX64 are rated for 1,000,000 mechanical cycles, ensuring equivalent reliability and service life in switching applications.

Q: Which part should I select for high-temperature applications?

A: The 1SX26-C supports an operating temperature range of -55°C to 125°C, providing broader high-temperature capability compared to the 21SX64 (-53°C to 85°C). For applications requiring operation above 85°C, the 1SX26-C is the appropriate selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message