DA3C-D1RB Equivalent & Substitute Parts

Part Overview

The DA3C-D1RB is a snap-action switch manufactured by ZF Electronics, configured as a single-pole double-throw (SPDT) device with on-momentary function. This chassis-mounted switch is rated for 100mA AC at 125V and features a lever roller actuator with solder lug termination. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

DA3C-D1RB

ZF ElectronicsIn Stock: 1001DA3C-D1RB Datasheet

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DB3C-A1RC

ZF ElectronicsIn Stock: 1176DB3C-A1RC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DA3C-D1RB is determined by the following critical parameters that must remain constant or compatible:

• Circuit configuration (SPDT)
• Switch function (On-Momentary)
• Current rating (100mA AC minimum)
• Voltage rating (125V AC minimum)
• Actuator type (Lever, Roller)
• Mounting type (Chassis Mount)
• Termination style (Solder Lug)
• Operating temperature range (minimum -40°C to 85°C)

The DB3C-A1RC meets all these core electrical and mechanical requirements while offering improved specifications in operating force, position tolerances, temperature range, and mechanical life. The substitute maintains identical circuit topology and current/voltage ratings while providing enhanced durability characteristics.

Parameter Comparison

Engineering Selection Recommendations

The DB3C-A1RC is the direct substitute for the obsolete DA3C-D1RB. Both parts share identical electrical specifications (SPDT, 100mA AC, 125V AC) and mechanical interface requirements (chassis mount, solder lug termination, lever roller actuator).

The DB3C-A1RC offers the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• RoHS3 compliance meets current environmental and regulatory requirements
• Extended operating temperature range (-40°C to 120°C versus -40°C to 85°C) provides broader application flexibility
• Specified mechanical life rating (15,000,000 cycles) versus unspecified for the original part
• IP50 ingress protection rating provides enhanced environmental sealing

Mechanical parameter differences (operating force, position, pretravel, and overtravel) reflect design improvements in the active product line. These differences are within normal engineering tolerances for snap-action switch families and do not preclude direct substitution in applications designed for the DA3C-D1RB.

Frequently Asked Questions (FAQ)

Q: Can the DB3C-A1RC be used as a direct replacement for the DA3C-D1RB?

A: Yes. Both parts 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 (solder lug). These parameters define functional equivalence for snap-action switch applications.

Q: What are the mechanical differences between these parts?

A: The DB3C-A1RC has a higher operating force (55gf versus 30gf), larger operating position (0.638" versus 0.571"), increased pretravel (0.178" versus 0.131"), and greater overtravel (0.079" versus 0.047"). These represent design refinements in the active product and do not affect electrical compatibility or basic mechanical interface.

Q: Does the higher operating temperature range of the DB3C-A1RC affect compatibility?

A: No. The extended range (-40°C to 120°C versus -40°C to 85°C) is a superset of the original specification. Applications designed for the DA3C-D1RB will operate within the DB3C-A1RC's rated temperature envelope.

Q: Is RoHS compliance a requirement for substitution?

A: RoHS3 compliance of the DB3C-A1RC meets current regulatory standards. The original DA3C-D1RB is RoHS non-compliant. Substitution decisions depend on application regulatory requirements and procurement policies.

Q: What is the significance of the IP50 rating on the DB3C-A1RC?

A: IP50 (dust protected) indicates enhanced environmental sealing compared to the unspecified ingress protection of the DA3C-D1RB. This provides improved performance in dusty or contaminated environments without affecting electrical or mechanical compatibility.

Q: Are there packaging differences between these parts?

A: The DA3C-D1RB packaging is listed as dash (unspecified), while the DB3C-A1RC is supplied in bulk packaging. Packaging format does not affect component functionality or substitution eligibility.