GDB08 Equivalent & Substitute Parts

Part Overview

The GDB08 is a DIP switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a single-pole single-throw (SPST) 8-position through-hole rocker actuator switch rated for 25mA at 24VDC. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The GDB08 features a flush, recessed rocker actuator with gold-plated copper alloy contacts and is suitable for applications requiring low-current switching in industrial and commercial equipment.

Substiute Parts

GDB08

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1184GDB08 Datasheet

Current PartRFQ

78B08T

Grayhill Inc.In Stock: 351278B08T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GDB08 is determined by the following critical parameters that must be maintained or exceeded for functional compatibility:

Mandatory Compatibility Parameters:

• Circuit configuration: SPST (single-pole single-throw)
• Number of positions: 8
• Mounting type: Through hole
• Pitch: 0.100" (2.54mm)
• Contact material: Copper alloy with gold finish
• Termination style: PC pin

Performance Parameters (Minimum Requirements):

• Current rating: Must equal or exceed 25mA
• Voltage rating: Must equal or exceed 24VDC
• Operating temperature range: Must encompass or exceed -30°C ~ 85°C

The substitute part 78B08T from Grayhill Inc. satisfies all mandatory compatibility parameters and exceeds performance requirements with a 150mA current rating and 30VDC voltage rating. The primary differences are the actuator type (slide versus rocker) and physical height above board, which represent design trade-offs rather than functional incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

GDB08 Obsolescence Status: The GDB08 is classified as obsolete and no longer manufactured by TE Connectivity ALCOSWITCH Switches. For new designs or production continuity, the 78B08T from Grayhill Inc. is the identified substitute.

Compliance Considerations: The 78B08T offers superior regulatory compliance as an ROHS3-compliant component, whereas the GDB08 is RoHS non-compliant. For applications subject to RoHS directives or customer requirements mandating RoHS compliance, the 78B08T is the appropriate selection.

Performance Advantages: The 78B08T provides enhanced electrical and mechanical performance with a 150mA current rating (versus 25mA) and 2,000-cycle life rating (versus 1,000 cycles), supporting higher-reliability applications. The extended operating temperature range (-40°C to 85°C versus -30°C to 85°C) accommodates broader environmental conditions.

Design Integration Considerations: The 78B08T features a slide actuator with raised profile (0.315" height) compared to the GDB08's flush rocker actuator (0.169" height). PCB layout and enclosure design must accommodate the increased actuator height. Both components maintain identical 0.100" pitch and through-hole PC pin termination, ensuring footprint compatibility on the printed circuit board.

Frequently Asked Questions (FAQ)

Q: Can the 78B08T directly replace the GDB08 without PCB modification?

A: The 78B08T maintains identical pitch (0.100") and PC pin termination, allowing direct mounting to existing GDB08 footprints. However, the increased actuator height (0.315" versus 0.169") requires verification that enclosure clearance and user interface design accommodate the raised slide actuator profile.

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

A: The 78B08T exceeds GDB08 specifications in current rating (150mA versus 25mA) and voltage rating (30VDC versus 24VDC). Both maintain SPST 8-position configuration with identical pitch and contact materials. The 78B08T supports 2,000 mechanical and electrical cycles compared to 1,000 cycles for the GDB08.

Q: Does the actuator type change affect functionality?

A: Both rocker and slide actuators provide equivalent SPST switching functionality. The actuator type represents a mechanical interface difference. Rocker actuators (GDB08) provide flush, recessed operation, while slide actuators (78B08T) feature raised profiles. Selection depends on user interface requirements and enclosure design constraints.

Q: Is the 78B08T suitable for applications originally designed for the GDB08?

A: The 78B08T is functionally suitable for applications within the GDB08's original electrical specifications (25mA at 24VDC). The substitute's higher ratings provide design margin. Physical integration requires confirmation of actuator height compatibility with enclosure and user interface design.

Q: What is the significance of RoHS compliance difference?

A: The GDB08 is RoHS non-compliant, while the 78B08T is ROHS3 compliant. For applications subject to RoHS directives, EU market requirements, or customer specifications mandating RoHS compliance, the 78B08T is the required selection.

Q: Are there packaging differences between these components?

A: The GDB08 is supplied in standard packaging, while the 78B08T is supplied in tube packaging. Tube packaging affects component handling, automated assembly compatibility, and inventory management. Verify compatibility with existing procurement and assembly processes.

Q: How do the operating temperature ranges compare?

A: The 78B08T supports -40°C to 85°C, extending the lower temperature limit by 10°C compared to the GDB08's -30°C to 85°C range. For applications operating in cold environments, the 78B08T provides enhanced temperature coverage.