U21SYCGE Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The U21SYCGE is an active production toggle switch manufactured by C&K, featuring DPDT (Double Pole Double Throw) circuitry with On-On switching function. This panel-mount switch is rated for 5A at 120V AC and 28V DC, with a standard round actuator and PC pin termination. The part is ROHS3 compliant and carries REACH affected status. Substitute parts may be required due to inventory constraints, regional availability, or specific application requirements within the defined electrical and mechanical parameter ranges.

Substiute Parts

U21SYCGE

C&KIn Stock: 1065U21SYCGE Datasheet

Current PartRFQ

100DP1T1B1M2QEH

E-SwitchIn Stock: 8034100DP1T1B1M2QEH Datasheet

SimilarRFQ

100DP1T6B15M2RE

E-SwitchIn Stock: 891100DP1T6B15M2RE Datasheet

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2-1825138-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 18262-1825138-4 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the U21SYCGE is determined by strict alignment of the following core parameters:

Primary Compatibility Criteria:

• Circuit configuration: DPDT
• Switch function: On-On
• Mounting type: Panel Mount
• Termination style: PC Pin
• Panel cutout dimensions: Circular - 6.35mm Dia
• Bushing thread: 1/4-40
• Operating temperature range: -30°C ~ 85°C
• RoHS compliance: ROHS3 Compliant

Electrical Rating Considerations: Substitute parts must maintain electrical ratings within the application's operational envelope. The U21SYCGE operates at 5A (AC/DC) with 120V AC and 28V DC ratings. Substitute parts with lower current or voltage ratings (0.4VA at 20V) are suitable only for applications requiring reduced electrical capacity.

Mechanical Compatibility: All substitute parts share identical panel mounting interfaces, cutout dimensions, and bushing specifications, ensuring direct mechanical interchangeability in panel installations.

Parameter Comparison

Engineering Selection Recommendations

100DP1T1B1M2QEH (E-Switch): This substitute maintains full electrical compatibility with the U21SYCGE, matching 5A current rating and 120V AC / 28V DC voltage specifications. ROHS3 compliance is confirmed. REACH unaffected status may provide regulatory advantage in certain supply chain contexts. Electrical life rating of 40,000 cycles is lower than the original part. This substitute is suitable for direct replacement in applications where the reduced cycle life does not impact operational requirements.

100DP1T6B15M2RE (E-Switch): This part shares identical mechanical mounting characteristics but operates at reduced electrical capacity (0.4VA at 20V). ROHS3 compliance and REACH unaffected status are confirmed. This substitute is applicable only to applications with electrical requirements not exceeding 0.4VA at 20V AC/DC. Mechanical interchangeability is maintained; electrical compatibility requires application-specific verification.

2-1825138-4 (TE Connectivity ALCOSWITCH Switches): This Gemini A series part provides mechanical compatibility but operates at reduced electrical capacity (0.4VA at 20V). ROHS3 compliance and REACH affected status match the original part. Electrical life of 6,000 cycles is significantly lower than both the original and other substitutes. This substitute is applicable only to low-power applications with electrical requirements not exceeding 0.4VA at 20V AC/DC.

Frequently Asked Questions (FAQ)

Q: Can 100DP1T1B1M2QEH replace U21SYCGE in all applications? A: 100DP1T1B1M2QEH maintains identical electrical ratings (5A, 120V AC, 28V DC) and mechanical mounting specifications. The primary difference is reduced electrical life (40,000 cycles versus 100,000 cycles). Substitution is valid for applications where this cycle life reduction does not compromise operational requirements.

Q: What is the difference between the E-Switch and TE Connectivity substitutes? A: Both 100DP1T6B15M2RE and 2-1825138-4 operate at reduced electrical capacity (0.4VA at 20V) compared to the original U21SYCGE (5A at 120V AC). The TE Connectivity part has significantly lower electrical life (6,000 cycles). Both are suitable only for low-power applications. Mechanical mounting is identical across all parts.

Q: Are all substitutes panel-mount compatible? A: Yes. All substitute parts share identical panel cutout dimensions (Circular - 6.35mm Dia) and bushing thread specifications (1/4-40), ensuring direct mechanical interchangeability in panel installations.

Q: What is the significance of REACH status differences? A: REACH affected status indicates the part contains substances of concern under EU chemical regulations. The original U21SYCGE and 2-1825138-4 are REACH affected. The E-Switch substitutes (100DP1T1B1M2QEH and 100DP1T6B15M2RE) are REACH unaffected. Selection depends on supply chain and regulatory requirements.

Q: Can low-power substitutes be used in high-power applications? A: No. Parts rated 0.4VA at 20V (100DP1T6B15M2RE and 2-1825138-4) cannot safely operate in applications requiring 5A at 120V AC. Electrical rating mismatch creates risk of component failure and circuit damage.

Q: What does electrical life rating indicate? A: Electrical life specifies the number of switching cycles a part is rated to perform before degradation. The U21SYCGE is rated for 100,000 cycles. Substitutes with lower ratings (40,000 or 6,000 cycles) have reduced operational longevity and are suitable only for applications with correspondingly lower switching frequency requirements.