Grayhill 76SC03T DIP Switch Rocker SPDT Equivalent & Substitute Parts

Part Overview

The Grayhill 76SC03T is a through-hole DIP switch with rocker actuator, SPDT circuit configuration, and 3-position design. This component is rated for 150mA at 30VDC and features gold-plated copper alloy contacts suitable for general-purpose switching applications. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

76SC03T

Grayhill Inc.In Stock: 69276SC03T Datasheet

Current PartRFQ

76SC04T

Grayhill Inc.In Stock: 110876SC04T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 76SC03T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer Series: 76
• Circuit Configuration: SPDT
• Current Rating: 150mA
• Voltage Rating: 30VDC
• Actuator Type: Rocker
• Mounting Type: Through Hole
• Pitch: 0.100" (2.54mm)
• Height Above Board: 0.315" (8.00mm)
• Contact Material: Copper Alloy
• Contact Finish: Gold

Allowable Variation Parameters:

• Number of Positions: May differ based on application requirements
• Length: May vary with position count
• Product Status: Active status preferred for ongoing availability
• Packaging: May differ from original specification

The 76SC04T qualifies as a substitute based on matching all mandatory electrical and mechanical parameters while differing only in position count (4 vs. 3) and resulting length dimension.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Grayhill 76SC04T

The 76SC04T is the qualified substitute for the obsolete 76SC03T. Selection of this substitute is based on the following engineering criteria:

Electrical Compatibility: The 76SC04T maintains identical electrical specifications including SPDT circuit configuration, 150mA current rating, and 30VDC voltage rating. Contact material, finish, and operating temperature range are unchanged.

Mechanical Compatibility: Through-hole mounting, PC pin termination, 0.100" pitch, and 0.315" height above board are preserved. The 4-position design results in a 0.200" length increase (0.780" vs. 0.580"), which must be verified against available PCB layout space.

Compliance Status: The 76SC04T carries Active product status, ensuring continued availability and manufacturer support. ROHS3 compliance represents an improvement over the RoHS Compliant status of the original part. Both parts maintain REACH Unaffected and EAR99 ECCN classifications.

Inventory Availability: The 76SC04T is available in higher quantity (1,023 pcs) compared to the 76SC03T (656 pcs), supporting long-term procurement requirements.

Design Consideration: The additional position in the 76SC04T does not affect electrical performance if only three positions are utilized in the application. PCB layout must accommodate the increased length dimension.

Frequently Asked Questions (FAQ)

Q: Can the 76SC04T directly replace the 76SC03T without circuit modification?

A: The 76SC04T is electrically compatible with the 76SC03T for applications using three or fewer switch positions. The fourth position remains available but unused. No circuit modification is required if PCB layout accommodates the increased length (0.780" vs. 0.580").

Q: What is the primary difference between these two parts?

A: The 76SC03T is a 3-position switch while the 76SC04T is a 4-position switch. All electrical parameters, contact specifications, and mounting characteristics are identical. The length dimension increases by 0.200" to accommodate the additional position.

Q: Are there any compliance or certification differences?

A: Both parts are RoHS compliant. The 76SC04T carries ROHS3 certification, representing a more current compliance standard. Both maintain REACH Unaffected status and EAR99 ECCN classification.

Q: Why is the 76SC03T listed as obsolete?

A: The 76SC03T is obsolete per manufacturer status. The 76SC04T is the active equivalent in the Grayhill 76 series, ensuring ongoing availability and manufacturer support for new designs and component replenishment.

Q: Does packaging differ between these parts?

A: The 76SC03T packaging is listed as unspecified in available documentation. The 76SC04T is supplied in tube packaging. Confirm packaging requirements with procurement specifications.

Q: What is the pitch specification and why is it important?

A: Both parts feature 0.100" (2.54mm) pitch, which is the standard spacing for through-hole DIP switch mounting on PCBs. This specification ensures compatibility with standard DIP switch footprints and breadboard layouts.

Q: Are the mechanical life ratings identical?

A: Yes, both parts are rated for 2,000 mechanical cycles and 2,000 electrical cycles, indicating identical durability and switching endurance specifications.