SX0784 Toggle Switch DPST Equivalent & Substitute Parts

Part Overview

The SX0784 is a DPST (Double Pole Single Throw) toggle switch manufactured by Bulgin, rated for 10A at 250V AC and 28V DC. This panel-mount switch features a standard round actuator with screw terminal connections and a 12.00mm circular panel cutout. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and new design applications where this component is specified.

Substiute Parts

SX0784

BulginIn Stock: 831SX0784 Datasheet

Current PartRFQ

C3950BA

BulginIn Stock: 3022C3950BA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX0784 is determined by the following critical parameters:

• Circuit Configuration: Both main and substitute parts must maintain DPST topology to preserve dual-pole switching functionality
• Switch Function: On-Off operation must be preserved
• Mounting Type: Panel mount configuration is required for mechanical compatibility
• Actuator Type: Standard round actuator ensures consistent user interface
• Electrical Ratings: Substitute parts must meet or exceed the voltage and current requirements of the application
• Termination Style: Connection method affects installation compatibility
• Panel Cutout Dimensions: Physical panel integration depends on cutout specifications
• Compliance: RoHS3 and REACH compliance status ensures regulatory alignment

The C3950BA qualifies as a substitute based on matching circuit configuration (DPST), switch function (On-Off), mounting type (Panel Mount), and actuator type (Standard Round). Both parts are ROHS3 compliant and REACH unaffected.

Parameter Comparison

Engineering Selection Recommendations

The C3950BA is an active-status substitute for the obsolete SX0784. Both components are manufactured by Bulgin and maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

The C3950BA provides higher current capacity (20A AC / 14A DC) compared to the SX0784 (10A AC/DC), making it suitable for applications requiring equal or lower current draw. The C3950BA supports 125V AC and 36V DC, which differs from the SX0784 specification of 250V AC and 28V DC. Voltage compatibility must be verified against the specific application requirements.

Mechanical differences include panel cutout diameter (12.70mm for C3950BA versus 12.00mm for SX0784) and actuator length (17.50mm versus 19.10mm). Termination differs between screw terminal (SX0784) and quick connect (C3950BA), requiring evaluation of installation methodology.

Frequently Asked Questions (FAQ)

Q: Can the C3950BA directly replace the SX0784 in all applications?

A: The C3950BA matches the core functional requirements (DPST, On-Off, panel mount, standard round actuator) but differs in voltage ratings, current capacity, termination style, and panel cutout dimensions. Substitution is valid only when the application voltage and current requirements align with C3950BA specifications and mechanical integration accommodates the dimensional differences.

Q: What are the key differences in electrical ratings?

A: The SX0784 is rated for 250V AC and 28V DC at 10A. The C3950BA is rated for 125V AC and 36V DC with higher current capacity (20A AC, 14A DC). Applications operating at 250V AC cannot use the C3950BA. Applications at 125V AC or lower with current requirements up to 20A AC or 14A DC are compatible.

Q: How do termination differences affect installation?

A: The SX0784 uses screw terminals requiring wire attachment via terminal screws. The C3950BA uses quick connect terminals (0.250" / 6.3mm) designed for push-on spade connectors. Installation methodology and connector compatibility must be evaluated for each application.

Q: Are panel cutout dimension differences critical?

A: The SX0784 requires a 12.00mm circular cutout; the C3950BA requires 12.70mm. Existing panel holes sized for the SX0784 will not accommodate the C3950BA without modification. New panel designs or retrofit applications must account for this dimensional difference.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the SX0784 and C3950BA are ROHS3 compliant and REACH unaffected, ensuring regulatory alignment for current manufacturing and distribution standards.