U21SDAQE Toggle Switch DPDT 5A 120V Equivalent & Substitute Parts

Part Overview

The U21SDAQE is a DPDT (Double Pole Double Throw) toggle switch manufactured by C&K, designed for panel mount applications with right angle orientation. This switch is rated for 5A at 120V AC and 28V DC, featuring a non-illuminated standard round actuator with epoxy sealed terminals. The product is currently active and available in tray packaging with 725 units in stock.

Equivalent and substitute parts are identified when components share identical electrical ratings, mechanical mounting specifications, and functional circuit configurations. Alternative models from E-Switch provide functionally compatible options for applications requiring DPDT switching capability with matching voltage and current parameters.

Substiute Parts

U21SDAQE

C&KIn Stock: 764U21SDAQE Datasheet

Current PartRFQ

100DP1T1B1M6QE

E-SwitchIn Stock: 1262100DP1T1B1M6QE Datasheet

SimilarRFQ

100DP1T1B1M6QEH

E-SwitchIn Stock: 1485100DP1T1B1M6QEH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the U21SDAQE is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must be DPDT
• Switch function must be On-On
• Current rating must be 5A (AC/DC)
• Voltage ratings must match: 120V AC and 28V DC minimum

Mechanical Compatibility Requirements:

• Mounting type must be Panel Mount, Right Angle
• Panel cutout dimensions must be Circular - 6.35mm Dia
• Bushing thread must be 1/4-40
• Termination style must be PC Pin
• Actuator type must be Standard Round

Environmental & Compliance Requirements:

• Operating temperature range must encompass -30°C to 85°C
• RoHS3 compliance required
• MSL rating of 1 (Unlimited) required

The E-Switch models 100DP1T1B1M6QE and 100DP1T1B1M6QEH meet all electrical and mechanical compatibility criteria with the U21SDAQE. Both substitute parts maintain identical circuit configuration, current and voltage ratings, mounting specifications, and environmental operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Both E-Switch substitute parts (100DP1T1B1M6QE and 100DP1T1B1M6QEH) are qualified alternatives to the U21SDAQE based on electrical and mechanical parameter equivalence. All three parts maintain active product status and full compliance with ROHS3 and EAR99 export classification requirements.

The primary distinction between the U21SDAQE and the E-Switch alternatives is electrical life rating: the C&K part specifies 100,000 cycles while the E-Switch models specify 40,000 cycles. This difference should be evaluated against application duty cycle requirements. The U21SDAQE also features a longer actuator length of 12.45mm compared to 10.41mm on the E-Switch models, which may affect panel mounting clearance in space-constrained applications.

Both E-Switch models are functionally interchangeable from an electrical and mechanical standpoint. The choice between 100DP1T1B1M6QE and 100DP1T1B1M6QEH should be based on packaging requirements (bulk vs. tray) and inventory availability for your supply chain.

Frequently Asked Questions (FAQ)

Q: Can the E-Switch 100DP1T1B1M6QE be used as a direct replacement for the U21SDAQE?

A: Yes. Both parts share identical electrical ratings (5A, 120V AC, 28V DC), circuit configuration (DPDT On-On), and mechanical mounting specifications (panel mount, right angle, 1/4-40 bushing thread, 6.35mm circular cutout). PC pin termination and epoxy sealed terminals are common to both. The parts are electrically and mechanically compatible for direct substitution in panel-mounted applications.

Q: What is the difference between the two E-Switch substitute models?

A: The 100DP1T1B1M6QE and 100DP1T1B1M6QEH are electrically and mechanically identical. The primary difference is packaging: 100DP1T1B1M6QE is supplied in bulk packaging, while 100DP1T1B1M6QEH is also supplied in bulk packaging. Both models are functionally equivalent and interchangeable.

Q: Does the actuator length difference affect compatibility?

A: The U21SDAQE has an actuator length of 12.45mm while the E-Switch substitutes measure 10.41mm. This 2.04mm difference may impact panel mounting clearance and operator ergonomics. Applications with tight panel geometry or specific actuator reach requirements should account for this dimensional variance during mechanical design review.

Q: Are all three parts RoHS3 compliant?

A: Yes. The U21SDAQE, 100DP1T1B1M6QE, and 100DP1T1B1M6QEH are all ROHS3 compliant with MSL rating of 1 (Unlimited). All parts carry EAR99 export classification and share the same HTSUS code (8536.50.9065).

Q: What is the significance of the electrical life rating difference?

A: The U21SDAQE specifies 100,000 electrical cycles while the E-Switch models specify 40,000 cycles. For applications with high switching frequency or extended operational life requirements, the higher cycle rating of the U21SDAQE may be preferable. Applications with moderate switching duty cycles can operate within the 40,000-cycle specification of the E-Switch alternatives.

Q: Can these parts be used in the same circuit without modification?

A: Yes. All three parts are DPDT On-On switches with identical voltage and current ratings. They share the same PC pin termination style and panel cutout dimensions. No circuit modifications are required for substitution, provided the application duty cycle aligns with the electrical life rating of the selected part.