DA04 DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The DA04 is a 4-position DIP switch manufactured by APEM Inc., configured as a single-pole single-throw (SPST) switch with a 50mA current rating at 24VDC. This component features a through-hole, right-angle mounting configuration with a standard slide actuator and gold-plated phosphor bronze contacts. The DA04 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

DA04

APEM Inc.In Stock: 780DA04 Datasheet

Current PartRFQ

NDA-04-V

APEM Inc.In Stock: 901NDA-04-V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DA04 is determined by the following critical parameters:

• Circuit Configuration & Positions: Both main and substitute parts must maintain SPST topology with 4-position configuration for direct functional equivalence.
• Voltage Rating: 24VDC requirement is maintained across all substitute candidates.
• Mounting & Pitch: Through-hole, right-angle mounting with 0.100" (2.54mm) pitch ensures mechanical compatibility with existing PCB layouts.
• Actuator Type: Standard slide actuator with raised actuator level provides identical user interface and actuation force profile.
• Contact Finish & Material: Gold plating ensures consistent electrical performance and corrosion resistance.
• Operating Temperature: -20°C ~ 70°C range must be maintained for environmental compatibility.
• Compliance: RoHS3 compliance is required for regulatory alignment.

The NDA-04-V qualifies as a substitute based on matching circuit topology, voltage rating, mounting configuration, pitch, actuator type, contact finish, operating temperature range, and RoHS compliance. Current rating variance (25mA vs. 50mA) represents a derating condition acceptable for applications not requiring the full 50mA capacity of the original DA04.

Parameter Comparison

Engineering Selection Recommendations

The NDA-04-V represents the primary substitute for the obsolete DA04. Both components are manufactured by APEM Inc. and share identical mechanical and electrical interfaces. The NDA-04-V maintains active product status, ensuring long-term availability and supply chain continuity.

Current rating reduction from 50mA to 25mA in the NDA-04-V requires circuit-level verification. Applications operating below 25mA continuous current will experience no functional degradation. Applications requiring the full 50mA capacity of the original DA04 must either source remaining DA04 inventory or redesign the circuit to accommodate the lower current rating of the NDA-04-V.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and legacy system support. Identical operating temperature ranges (-20°C ~ 70°C) and electrical life ratings (2,000 cycles) ensure equivalent performance characteristics across the specified environmental envelope.

Frequently Asked Questions (FAQ)

Q: Can the NDA-04-V directly replace the DA04 in existing designs?

A: Direct mechanical and electrical interface compatibility is confirmed. Substitution is valid for applications where switch current requirements do not exceed 25mA. Designs requiring 50mA operation require circuit modification or alternative sourcing.

Q: What is the primary difference between the DA04 and NDA-04-V?

A: The NDA-04-V operates at a reduced current rating of 25mA compared to the DA04's 50mA specification. All other electrical and mechanical parameters remain equivalent.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts maintain identical RoHS3 compliance and REACH unaffected status. No regulatory barriers exist to substitution.

Q: How do the mechanical dimensions compare?

A: Both parts feature identical mounting configurations, pitch spacing (0.100"), and height above board (0.390"). PCB layout modifications are not required for substitution.

Q: What is the product status difference, and why does it matter?

A: The DA04 is classified as obsolete, indicating discontinued manufacturing and limited inventory availability. The NDA-04-V maintains active status, ensuring ongoing availability and supply chain support for future procurement requirements.