SX0780 Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The SX0780 is a panel-mounted toggle switch with DPDT (Double Pole Double Throw) configuration, rated for 10A at 250V AC and 28V DC. This component features a standard round actuator with screw terminal termination and a 12.00mm circular panel cutout. The SX0780 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this switch type is required.

Substiute Parts

SX0780

BulginIn Stock: 1000SX0780 Datasheet

Current PartRFQ

C3970BA

BulginIn Stock: 839C3970BA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The C3970BA qualifies as a substitute for the SX0780 based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Circuit configuration: Both DPDT
• Switch function: Both On-Off-On
• Mounting type: Both panel mount
• Actuator type: Both standard round
• Illumination: Both non-illuminated
• RoHS compliance: Both ROHS3 compliant
• REACH status: Both REACH unaffected
• ECCN classification: Both EAR99

Electrical Compatibility Considerations: The C3970BA provides higher current ratings (16A AC / 14A DC) and higher DC voltage rating (36V) compared to the SX0780 (10A / 28V DC). These elevated ratings ensure the substitute can handle the electrical demands of applications originally designed for the SX0780.

Mechanical Compatibility Considerations: Panel cutout dimensions differ slightly (C3970BA: 12.70mm vs. SX0780: 12.00mm). Termination style differs (C3970BA: Quick Connect 0.250" vs. SX0780: Screw Terminal). Actuator length differs (C3970BA: 17.50mm vs. SX0780: 19.10mm). These mechanical differences require evaluation for specific installation requirements.

Parameter Comparison

Engineering Selection Recommendations

The C3970BA is an active product from Bulgin with current manufacturing support, whereas the SX0780 is obsolete. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

Selection of the C3970BA as a substitute requires verification of mechanical fit within the existing panel assembly due to the 0.70mm increase in panel cutout diameter and the 1.60mm reduction in actuator length. The termination style transition from screw terminal to quick connect requires corresponding modifications to the wiring harness or connector interface.

The C3970BA's higher current and voltage ratings provide operational margin above the SX0780 specifications, supporting use in applications with equivalent or lower electrical demands.

Frequently Asked Questions (FAQ)

Q: Can the C3970BA directly replace the SX0780 without any modifications?

A: Electrical substitution is feasible due to matching circuit configuration and switch function. Mechanical substitution requires assessment of panel cutout tolerance, actuator length clearance, and termination interface compatibility. The 0.70mm panel cutout diameter increase and termination style change necessitate evaluation for specific installations.

Q: What are the key electrical differences between these parts?

A: The C3970BA provides higher current capacity (16A AC vs. 10A AC) and higher DC voltage rating (36V vs. 28V DC). The SX0780 maintains a higher AC voltage rating (250V vs. 125V). Selection depends on the specific electrical requirements of the application.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the SX0780 and C3970BA are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations.

Q: What is the impact of the different termination styles?

A: The SX0780 uses screw terminals while the C3970BA uses quick connect 0.250" terminals. This difference requires modification of the connection interface, including potential changes to the wiring harness or connector assembly.

Q: Why is the SX0780 listed as obsolete?

A: The SX0780 is no longer in active production. The C3970BA, as an active Bulgin product, represents the current equivalent offering for DPDT toggle switch applications in this category.