Grayhill 76SC03ST DIP Switch Rocker SPDT Equivalent & Substitute Parts

Part Overview

The Grayhill 76SC03ST is a DIP switch featuring a rocker actuator with SPDT (Single Pole Double Throw) circuit configuration, rated for 150mA at 30VDC. This component is designed for through-hole mounting applications requiring manual switching functionality with sealed contacts. The 76SC03ST is classified as obsolete, necessitating identification of active equivalent components to ensure design continuity and procurement availability for new production runs and field replacements.

Substiute Parts

76SC03ST

Grayhill Inc.In Stock: 81476SC03ST Datasheet

Current PartRFQ

76SC04ST

Grayhill Inc.In Stock: 68476SC04ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 76SC03ST is determined by strict equivalence across electrical and mechanical parameters. The primary substitute identified is the Grayhill 76SC04ST, which maintains compatibility through the following critical parameters:

Electrical Equivalence Criteria:

• Identical circuit configuration (SPDT)
• Identical current rating (150mA)
• Identical voltage rating (30VDC)
• Identical contact material and finish (Copper Alloy, Gold)

Mechanical Equivalence Criteria:

• Identical actuator type (Rocker)
• Identical mounting type (Through Hole)
• Identical pitch spacing (0.100" / 2.54mm)
• Identical height above board (0.315" / 8.00mm)
• Identical operating temperature range (-40°C to 85°C)
• Identical termination style (PC Pin)

Compliance Equivalence:

• Both components maintain RoHS compliance
• Both components are REACH unaffected
• Both components share identical ECCN and HTSUS classifications

The primary difference between these components is the number of positions (3 vs. 4) and physical length, which affects board layout but not electrical switching capability per position.

Parameter Comparison

Engineering Selection Recommendations

The Grayhill 76SC04ST is the qualified substitute for the obsolete 76SC03ST based on the following engineering criteria:

Electrical Performance: Both components deliver identical electrical performance across all specified parameters including current capacity, voltage rating, and contact characteristics. The SPDT circuit configuration and gold-plated copper alloy contacts ensure equivalent signal integrity and reliability.

Mechanical Compatibility: The components share identical mounting specifications, pitch, and height above board. Through-hole mounting and PC pin termination are consistent between both parts, enabling direct footprint compatibility on existing PCB designs.

Compliance Status: The 76SC04ST maintains active product status with ROHS3 compliance, providing superior long-term availability compared to the obsolete 76SC03ST. Both components are REACH unaffected and share identical trade classification codes.

Physical Layout Consideration: The 76SC04ST has a length of 0.780" (19.81mm) compared to the 76SC03ST at 0.580" (14.73mm). This 0.200" (5.08mm) difference accommodates the additional switch position. PCB layout verification is required to confirm adequate board space for the substitute component.

Procurement Advantage: The 76SC04ST is currently in active production with 671 pieces in stock, ensuring reliable supply chain availability for both new designs and field service applications.

Frequently Asked Questions (FAQ)

Q: Can the 76SC04ST be used as a direct replacement for the 76SC03ST in existing designs?

A: The 76SC04ST is electrically and mechanically compatible with the 76SC03ST for all switching functions. However, the increased length (0.780" vs. 0.580") requires verification of available PCB space. If board layout permits the additional 0.200" length, the substitute is suitable for direct replacement.

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

A: The 76SC03ST contains 3 switch positions, while the 76SC04ST contains 4 switch positions. Both maintain identical electrical ratings, actuator characteristics, and mounting specifications. The additional position results in increased overall length.

Q: Are the electrical specifications identical between the two parts?

A: Yes. Both components are rated for 150mA at 30VDC with SPDT circuit configuration, gold-plated copper alloy contacts, and identical operating temperature range (-40°C to 85°C). Mechanical life and electrical life specifications are also identical at 2,000 cycles.

Q: What is the significance of the product status difference?

A: The 76SC03ST is classified as obsolete, indicating discontinued production and limited future availability. The 76SC04ST is active production, ensuring reliable supply for current and future procurement needs. For new designs, the 76SC04ST is the recommended selection.

Q: Does the packaging differ between these components?

A: The 76SC03ST is supplied with tape seal packaging, while the 76SC04ST is supplied in tube packaging. Both packaging formats are suitable for automated assembly and manual installation processes.

Q: Are there any compliance or certification differences?

A: Both components are RoHS compliant and REACH unaffected. The 76SC04ST carries ROHS3 certification, representing the current RoHS standard revision. Both components share identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications.

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

A: Both components feature 0.100" (2.54mm) pitch, which is the standard spacing for DIP switch footprints. This identical pitch ensures that PCB footprints designed for the 76SC03ST will accommodate the 76SC04ST without modification to hole spacing or via placement.