DA3C-B1RB Equivalent & Substitute Parts

Part Overview

The DA3C-B1RB is a snap-action SPDT switch manufactured by ZF Electronics, rated for 0.1A at 125V AC with chassis mount configuration and quick connect termination. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

The DA3C-B1RB operates as an On-Momentary switch with lever roller actuation, designed for applications requiring reliable contact switching in industrial and commercial equipment. Its obsolete status necessitates evaluation of active substitute components that maintain electrical and mechanical compatibility.

Substiute Parts

DA3C-B1RB

ZF ElectronicsIn Stock: 957DA3C-B1RB Datasheet

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DB3C-B1RC

ZF ElectronicsIn Stock: 1131DB3C-B1RC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DA3C-B1RB is based on strict equivalence of the following electrical and mechanical parameters:

• Circuit configuration must remain SPDT
• Switch function must remain On-Momentary
• Current rating must be equal to or greater than 100mA AC
• Voltage rating must be equal to or greater than 125V AC
• Actuator type must be lever with roller mechanism
• Mounting type must be chassis mount
• Termination style must be quick connect 0.110" (2.8mm)
• Operating temperature range must encompass the original -40°C to 85°C minimum
• Electrical life must meet or exceed 100,000 cycles

The DB3C-B1RC satisfies all substitution criteria. While mechanical parameters differ (operating force, position, and travel specifications), these variations remain within acceptable tolerances for chassis-mounted snap-action switch applications and do not compromise functional compatibility in standard switching circuits.

Parameter Comparison

Engineering Selection Recommendations

The DB3C-B1RC is the direct substitute for the obsolete DA3C-B1RB. Both components share identical electrical specifications and termination compatibility, ensuring drop-in replacement capability in existing circuit designs.

The DB3C-B1RC offers additional advantages: active product status ensures ongoing availability and supply chain continuity, ROHS3 compliance meets current environmental regulations, and extended operating temperature range (-40°C to 120°C) provides broader application flexibility compared to the original -40°C to 85°C specification.

Mechanical parameter differences (operating force, position, and travel) reflect design evolution within the ZF Electronics product line but do not compromise functional equivalence for standard chassis-mounted switching applications. Both components maintain identical electrical life ratings and moisture sensitivity classifications.

Frequently Asked Questions (FAQ)

Q: Can the DB3C-B1RC directly replace the DA3C-B1RB in existing equipment?

A: Yes. Both components share identical circuit configuration (SPDT), switch function (On-Momentary), current rating (100mA AC), voltage rating (125V AC), actuator type (lever roller), mounting type (chassis mount), and termination style (quick connect 0.110"). Electrical and mechanical compatibility is maintained.

Q: What are the differences in mechanical specifications between these parts?

A: The DB3C-B1RC has higher operating force (55gf vs. 30gf), greater operating position (0.638" vs. 0.571"), increased pretravel (0.178" vs. 0.131"), and greater overtravel (0.079" vs. 0.047"). Differential travel remains identical at 0.025". These variations reflect design refinement and do not affect switching functionality in standard applications.

Q: Does the DB3C-B1RC meet current compliance requirements?

A: Yes. The DB3C-B1RC is ROHS3 compliant, whereas the DA3C-B1RB is non-compliant. For applications subject to environmental regulations, the DB3C-B1RC satisfies current compliance mandates.

Q: What is the temperature operating range difference?

A: The DA3C-B1RB operates from -40°C to 85°C. The DB3C-B1RC extends this range to -40°C to 120°C, providing enhanced performance in higher-temperature environments while maintaining full compatibility at the original specification limits.

Q: Are packaging considerations relevant for substitution?

A: The DA3C-B1RB is supplied in standard packaging, while the DB3C-B1RC is supplied in bulk packaging. Both maintain identical component specifications and termination compatibility. Packaging format does not affect electrical or mechanical performance.

Q: What is the mechanical life rating of the DB3C-B1RC?

A: The DB3C-B1RC is rated for 15,000,000 mechanical cycles, providing extended durability compared to the original DA3C-B1RB specification, which does not include a published mechanical life rating.