YZ-2RDS4 Equivalent & Substitute Parts Reference

Part Overview

The YZ-2RDS4 is a snap-action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as a SPST-NO (Single Pole Single Throw - Normally Open) chassis mount switch. This component is rated for 15A AC at 125V and 500mA DC at 125V, featuring a round pin plunger actuator with screw terminal connections. The switch is currently in Active product status with 1,016 units available in inventory.

Identification of equivalent and substitute parts becomes necessary when the primary part number reaches end-of-life status, experiences supply chain constraints, or when design requirements necessitate alternative configurations within the same functional category. This reference provides engineering-validated substitutes based on electrical and mechanical parameter compatibility.

Substiute Parts

YZ-2RDS4

Honeywell Sensing and Productivity SolutionsIn Stock: 1082YZ-2RDS4 Datasheet

Current PartRFQ

YZ-2RDS5551-A22

Honeywell Sensing and Productivity SolutionsIn Stock: 981YZ-2RDS5551-A22 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the YZ-2RDS4 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Circuit configuration: SPST-NO
• Switch function: Off-Mom
• Current rating: 15A (AC), 500mA (DC)
• Voltage rating: 125V (AC and DC)

Mechanical Parameters (Non-Negotiable):

• Actuator type: Round (Pin Plunger)
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Ingress protection: Splash Proof

Performance Parameters (Non-Negotiable):

• Operating force: 368–538 gf
• Release force: 113 gf
• Operating position: 1.110" (28.2 mm)
• Differential travel: 0.002" (0.05 mm)
• Overtravel: 0.060" (1.5 mm)
• Operating temperature: −55°C to +85°C
• Mechanical life: 20,000,000 cycles

Compliance Parameters:

• RoHS Compliant status
• Moisture Sensitivity Level 1

A substitute part must match all parameters listed above to be considered functionally equivalent. Deviations in any electrical, mechanical, or performance parameter disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: YZ-2RDS4

The YZ-2RDS4 is the recommended primary component for new designs and procurement. This part maintains Active product status with Honeywell Sensing and Productivity Solutions, ensuring long-term availability, ongoing manufacturer support, and compliance with current industry standards. Current inventory of 1,016 units supports immediate deployment.

Substitute Selection: YZ-2RDS5551-A22

The YZ-2RDS5551-A22 is electrically and mechanically equivalent to the YZ-2RDS4 across all specified parameters. However, this part carries Obsolete product status, indicating discontinued manufacturing and limited future availability. The substitute contains 942 units in current inventory.

Selection Criteria:

For new designs, production runs, and long-term applications, specify the YZ-2RDS4 to ensure supply chain continuity and manufacturer support.

The YZ-2RDS5551-A22 is suitable only for replacement applications in existing systems where the original part number is documented and where inventory depletion is not a concern. This substitute is not recommended for new product development or applications requiring extended component lifecycle support.

Both parts are RoHS Compliant with Moisture Sensitivity Level 1, meeting environmental and handling requirements for industrial applications.

Frequently Asked Questions (FAQ)

Q: Can YZ-2RDS5551-A22 be used as a direct replacement for YZ-2RDS4 in existing assemblies?

A: Yes. All electrical, mechanical, and performance parameters are identical. The parts are functionally interchangeable in existing circuit designs and mechanical assemblies. However, the substitute part is Obsolete, so inventory may become unavailable.

Q: What is the difference between Active and Obsolete product status?

A: Active status indicates the manufacturer continues production and provides full technical support. Obsolete status indicates the manufacturer has discontinued production. The YZ-2RDS4 (Active) is preferred for new designs. The YZ-2RDS5551-A22 (Obsolete) should be used only for replacement in existing systems.

Q: Are there any packaging differences between these parts?

A: The main part YZ-2RDS4 is specified as Bulk packaging. The substitute YZ-2RDS5551-A22 does not have packaging information provided in the available data. Confirm packaging requirements with the supplier before procurement.

Q: What electrical parameters must match for substitution?

A: Circuit configuration (SPST-NO), switch function (Off-Mom), current rating (15A AC / 500mA DC), and voltage rating (125V AC/DC) must all match exactly. Deviations in any of these parameters disqualify a part from substitution.

Q: What mechanical parameters must match for substitution?

A: Actuator type (Round Pin Plunger), mounting type (Chassis Mount), termination style (Screw Terminal), and ingress protection (Splash Proof) must all match. Additionally, operating force, release force, travel distances, and operating position must be identical.

Q: Are both parts RoHS Compliant?

A: Yes. Both YZ-2RDS4 and YZ-2RDS5551-A22 are RoHS Compliant with Moisture Sensitivity Level 1 (Unlimited), meeting environmental and handling standards for industrial applications.

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

A: Both parts are rated for 20,000,000 cycles of mechanical operation under specified operating force conditions (368–538 gf).

Q: What is the operating temperature range?

A: Both parts operate across −55°C to +85°C, suitable for industrial and commercial environments with wide temperature variation.