U21SY4ZGE Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The U21SY4ZGE is a panel-mount toggle switch manufactured by C&K, featuring DPDT (Double Pole Double Throw) circuitry with On-On switching function. This component is rated for 5A at 120V AC and 28V DC, with a standard round actuator and solder lug termination. The part is Active in product status and ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings, mechanical mounting interfaces, and circuit configurations are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

U21SY4ZGE

C&KIn Stock: 1210U21SY4ZGE Datasheet

Current PartRFQ

100DP1T4B1M1QEH

E-SwitchIn Stock: 1534100DP1T4B1M1QEH Datasheet

SimilarRFQ

100DP1T6B11M1QEH

E-SwitchIn Stock: 1515100DP1T6B11M1QEH Datasheet

SimilarRFQ

100DP1T6B11M1REH

E-SwitchIn Stock: 1090100DP1T6B11M1REH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the U21SY4ZGE are qualified based on the following critical parameters that determine functional interchangeability:

Primary Substitution Criteria:

• Circuit configuration: DPDT
• Switch function: On-On
• Mounting interface: Panel mount with 6.35mm circular cutout and 1/4-40 bushing thread
• Termination style: Solder lug
• Electrical ratings: Current and voltage specifications must meet or exceed application requirements
• Operating temperature range: -30°C ~ 85°C minimum
• Actuator interface: Standard round or flat anti-rotation types compatible with panel cutout

Qualified Substitutes:

• 100DP1T4B1M1QEH (E-Switch)
• 100DP1T6B11M1QEH (E-Switch)
• 100DP1T6B11M1REH (E-Switch) — limited to applications requiring ≤0.4VA at ≤20V

Parameter Comparison

Engineering Selection Recommendations

100DP1T4B1M1QEH and 100DP1T6B11M1QEH (E-Switch): These parts are direct electrical equivalents to the U21SY4ZGE, matching the 5A/120V AC and 28V DC ratings. Both are ROHS3 compliant and Active in product status. Selection between these two depends on actuator geometry requirements: 100DP1T4B1M1QEH features a standard round actuator with 16.26mm length, while 100DP1T6B11M1QEH provides a flat anti-rotation actuator at 12.30mm length. The U21SY4ZGE uses a 10.67mm standard round actuator; verify panel cutout and actuator engagement depth before substitution. Both E-Switch alternatives demonstrate lower electrical life (40,000 cycles versus 100,000 cycles for the C&K part).

100DP1T6B11M1REH (E-Switch): This part is restricted to applications with electrical requirements not exceeding 0.4VA at 20V AC/DC. It is not suitable as a general substitute for the U21SY4ZGE in 5A/120V applications. Use only when application specifications explicitly require the lower power rating.

All substitute parts maintain ROHS3 compliance and Active product status, supporting regulatory and supply chain continuity objectives.

Frequently Asked Questions (FAQ)

Q: Can 100DP1T4B1M1QEH directly replace U21SY4ZGE in a 5A/120V application? A: Yes, provided the panel cutout and actuator engagement depth accommodate the 16.26mm actuator length. The electrical ratings are equivalent. Verify mechanical fit before deployment.

Q: What is the primary difference between 100DP1T4B1M1QEH and 100DP1T6B11M1QEH? A: Both provide identical electrical ratings (5A/120V AC, 28V DC). The difference is actuator type and length: 100DP1T4B1M1QEH uses a standard round actuator (16.26mm), while 100DP1T6B11M1QEH uses a flat anti-rotation actuator (12.30mm). Select based on panel interface requirements.

Q: Is 100DP1T6B11M1REH suitable for general replacement of U21SY4ZGE? A: No. The 100DP1T6B11M1REH is rated for 0.4VA at 20V maximum, which is insufficient for applications requiring 5A at 120V. Use only in low-power applications with specifications matching or below the 0.4VA/20V rating.

Q: What is the impact of lower electrical life in E-Switch alternatives? A: The U21SY4ZGE provides 100,000 electrical cycles, while E-Switch substitutes provide 40,000 cycles. For applications with high switching frequency or extended service life requirements, verify that 40,000 cycles meets operational expectations.

Q: Are all substitute parts ROHS3 compliant? A: Yes. U21SY4ZGE, 100DP1T4B1M1QEH, 100DP1T6B11M1QEH, and 100DP1T6B11M1REH are all ROHS3 compliant.

Q: What packaging differences exist between the main part and substitutes? A: U21SY4ZGE is supplied in Tray packaging, while all E-Switch substitutes are supplied in Bulk packaging. Verify packaging requirements for your procurement and assembly processes.