Grayhill 76RSB04S DIP Switch Rocker SPST Equivalent & Substitute Parts

Part Overview

The Grayhill 76RSB04S is a 4-position DIP switch with rocker actuator, rated for 150mA at 30VDC, designed for through-hole mounting applications. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. The part features a flush, recessed rocker actuator with gold-plated copper alloy contacts and operates across a temperature range of -40°C to 85°C.

Substiute Parts

76RSB04S

Grayhill Inc.In Stock: 126576RSB04S Datasheet

Current PartRFQ

76RSB04ST

Grayhill Inc.In Stock: 590876RSB04ST Datasheet

DirectRFQ

3-435668-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 39733-435668-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 76RSB04S is determined by strict alignment of electrical and mechanical parameters. The following criteria define valid substitutes:

Primary Substitution Criteria (Must Match):

• Circuit configuration: SPST
• Number of positions: 4
• Actuator type: Rocker
• Actuator level: Flush, Recessed
• Mounting type: Through Hole
• Pitch: 0.100" (2.54mm)
• Contact material: Copper Alloy
• Contact finish: Gold
• Termination style: PC Pin
• Washable capability: Yes
• Tape Seal feature: Present

Secondary Substitution Criteria (Allowable Variance):

• Current rating: Must equal or exceed 150mA
• Voltage rating: Must equal or exceed 30VDC
• Operating temperature range: Must encompass or exceed -40°C to 85°C
• Mechanical and electrical life: Must equal or exceed 2,000 cycles
• Height above board: Tolerance ±0.010" (0.25mm)
• Length: Tolerance ±0.010" (0.25mm)

Identified Substitutes:

1. 76RSB04ST (Grayhill Inc.) – Direct manufacturer equivalent with identical electrical and mechanical specifications. Product status is Active, providing superior availability and compliance status.

2. 3-435668-4 (TE Connectivity ALCOSWITCH Switches) – Partial substitute with reduced electrical ratings (60mA at 5VDC versus 150mA at 30VDC). Acceptable only for applications with lower power requirements that fall within the 60mA and 5VDC envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 76RSB04ST

The 76RSB04ST is the preferred substitute for the obsolete 76RSB04S. This part is manufactured by Grayhill Inc. and maintains identical electrical specifications (150mA at 30VDC), mechanical configuration, and dimensional characteristics. The 76RSB04ST carries Active product status, ensuring long-term availability and supply chain stability. Additionally, the 76RSB04ST achieves RoHS3 compliance, addressing regulatory requirements that the original 76RSB04S does not meet. The packaging format differs (Tube versus Tape), but this does not affect functional compatibility. Inventory availability of 5,809 pieces supports immediate procurement.

Secondary Recommendation: 3-435668-4

The 3-435668-4 manufactured by TE Connectivity ALCOSWITCH Switches is a partial substitute applicable only to applications where the circuit operates at 5VDC and 60mA or lower. This part does not meet the full electrical specification of the 76RSB04S (150mA at 30VDC) and must not be used in circuits requiring the higher voltage and current ratings. The 3-435668-4 carries Last Time Buy status, indicating limited future availability. This part is RoHS non-compliant and does not provide regulatory advantage over the original 76RSB04S. Selection of this substitute is restricted to legacy systems with reduced power requirements.

Frequently Asked Questions (FAQ)

Q1: Can the 76RSB04ST be used as a direct replacement for the 76RSB04S in all applications?

A: Yes. The 76RSB04ST is a direct functional equivalent. Both parts share identical electrical ratings (150mA at 30VDC), circuit configuration (SPST), number of positions (4), actuator type (rocker), mounting method (through hole), and dimensional specifications. The primary difference is product status (Active versus Obsolete) and RoHS compliance (RoHS3 versus non-compliant). No circuit modifications or board layout changes are required.

Q2: What are the limitations of using the 3-435668-4 as a substitute?

A: The 3-435668-4 has significantly reduced electrical ratings: 60mA at 5VDC compared to the 76RSB04S specification of 150mA at 30VDC. This substitute is only suitable for applications operating within the 60mA and 5VDC envelope. Use of this part in circuits requiring higher voltage or current will result in component failure. The mechanical and dimensional characteristics are compatible, but electrical compatibility must be verified before selection.

Q3: Does packaging format affect functional compatibility?

A: No. The 76RSB04S is supplied in Tape packaging, while the 76RSB04ST is supplied in Tube packaging. Both packaging formats contain identical components with identical electrical and mechanical properties. Packaging format affects only handling, storage, and procurement logistics, not functional performance or circuit compatibility.

Q4: Are there compliance differences between the main part and substitutes?

A: Yes. The 76RSB04S is RoHS non-compliant, while the 76RSB04ST achieves RoHS3 compliance. The 3-435668-4 is RoHS non-compliant. For applications subject to RoHS regulations, the 76RSB04ST is the only compliant option among the three parts. All three parts are classified as EAR99 for export control purposes and are REACH Unaffected.

Q5: What is the significance of product status (Obsolete, Active, Last Time Buy)?

A: Product status indicates supply chain availability and future support. Obsolete status (76RSB04S) means the manufacturer has discontinued production and will not accept new orders. Active status (76RSB04ST) indicates ongoing production and indefinite availability. Last Time Buy status (3-435668-4) indicates the manufacturer will accept orders for a limited time before discontinuation. For new designs and long-term support, Active status parts are preferred.

Q6: Are the operating temperature ranges interchangeable?

A: The 76RSB04S and 76RSB04ST both operate from -40°C to 85°C. The 3-435668-4 operates from -55°C to 105°C, providing a wider temperature envelope. If the application requires operation below -40°C or above 85°C, the 3-435668-4 may be considered, provided its reduced electrical ratings (60mA at 5VDC) are acceptable.

Q7: What mechanical life specification should be verified?

A: All three parts specify 2,000 mechanical cycles and 2,000 electrical cycles. This specification defines the expected operational lifespan under normal switching conditions. Applications requiring higher cycle counts must be evaluated separately against manufacturer datasheets.