Grayhill 78RB05 DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78RB05 is a slide-actuated DIP switch featuring single-pole single-throw (SPST) configuration with 5 positions, rated for 150mA at 30VDC. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The 78RB05T represents the direct active successor within the same product series, maintaining identical electrical and mechanical specifications while offering improved compliance status.

Substiute Parts

78RB05

Grayhill Inc.In Stock: 90078RB05 Datasheet

Current PartRFQ

78RB05T

Grayhill Inc.In Stock: 93678RB05T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the 78RB05 and 78RB05T is based on strict equivalence across all critical electrical and mechanical parameters. Both parts share identical specifications for circuit topology, position count, current and voltage ratings, actuator configuration, mounting methodology, and thermal operating range. The substitution is valid because:

Electrical Parameters Match:

• Current Rating: 150mA (identical)
• Voltage Rating: 30VDC (identical)
• Circuit Type: SPST (identical)

Mechanical Parameters Match:

• Number of Positions: 5 (identical)
• Actuator Type: Slide Standard (identical)
• Mounting: Through Hole with 0.100" pitch (identical)
• Height: 0.265" above board (identical)

Environmental Parameters Match:

• Operating Temperature: -40°C to 85°C (identical)
• Mechanical Life: 2,000 cycles (identical)
• Electrical Life: 2,000 cycles (identical)

The primary distinction is product status and compliance certification, not functional capability.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: The 78RB05T is the appropriate selection. This part maintains active product status with Grayhill Inc., ensuring continued availability and manufacturer support. The 78RB05T achieves RoHS3 compliance, meeting current regulatory requirements for electronic components in most jurisdictions.

For Legacy System Maintenance: The 78RB05 remains functionally equivalent for applications where RoHS compliance is not mandated and component availability from existing inventory is acceptable. However, long-term sourcing of the obsolete 78RB05 is not assured.

Compliance Considerations: The transition from 78RB05 (RoHS non-compliant) to 78RB05T (RoHS3 compliant) reflects current environmental and regulatory standards. Organizations subject to RoHS directives must transition to the 78RB05T for new procurements.

Packaging Impact: The 78RB05T is supplied in tube packaging, whereas the 78RB05 uses bulk packaging. This difference affects handling, storage, and component counting procedures but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the 78RB05T directly replace the 78RB05 in existing PCB designs?

A: Yes. The 78RB05T is a direct functional equivalent with identical electrical ratings (150mA, 30VDC, SPST), mechanical configuration (5-position slide actuator, through-hole mounting, 0.100" pitch), and physical dimensions (0.265" height, 0.580" length). No PCB redesign is required.

Q: What is the primary reason to transition from 78RB05 to 78RB05T?

A: The 78RB05 is classified as obsolete, while the 78RB05T maintains active product status. Additionally, the 78RB05T achieves RoHS3 compliance, whereas the 78RB05 is RoHS non-compliant. For new designs and ongoing production, the 78RB05T ensures regulatory compliance and manufacturer support.

Q: Are there differences in electrical performance between these parts?

A: No. Both parts are rated for 150mA at 30VDC with SPST configuration. Operating temperature range (-40°C to 85°C), mechanical life (2,000 cycles), and electrical life (2,000 cycles) are identical.

Q: Does the packaging difference (bulk vs. tube) affect component functionality?

A: No. Packaging affects logistics, storage, and handling procedures but does not alter electrical or mechanical performance. The 78RB05T's tube packaging provides improved protection during transport and storage compared to bulk packaging.

Q: Are both parts manufactured by the same company?

A: Yes. Both the 78RB05 and 78RB05T are manufactured by Grayhill Inc. The 78RB05T represents the current active production variant within the same product series.

Q: What compliance certifications apply to the 78RB05T?

A: The 78RB05T is RoHS3 compliant and REACH unaffected. It carries ECCN classification EAR99 and HTSUS code 8536.50.9065, consistent with the original 78RB05.