Grayhill 76RSB03 DIP Switch Rocker SPST Equivalent & Substitute Parts

Part Overview

The Grayhill 76RSB03 is a single-pole single-throw (SPST) DIP switch with rocker actuator, rated for 150mA at 30VDC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 76RSB03 features a 3-position through-hole configuration with gold-plated copper alloy contacts, flush-recessed rocker actuator, and PC pin termination at 0.100" pitch spacing.

Key Parameters

Parameter	Value
Manufacturer Part Number	76RSB03
Manufacturer	Grayhill Inc.
Circuit Configuration	SPST
Number of Positions	3
Current Rating	150mA
Voltage Rating	30VDC
Actuator Type	Rocker
Actuator Level	Flush, Recessed
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Height Above Board	0.292" (7.41mm)
Operating Temperature Range	-40°C to 85°C
Mechanical Life	2,000 Cycles
Electrical Life	2,000 Cycles
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 76RSB03 is determined by the following critical parameters: circuit configuration (SPST), number of positions (3), actuator type (rocker with flush-recessed level), mounting method (through hole), pitch spacing (0.100"), and termination style (PC pin).

Direct Equivalent: The 76RSB03T from Grayhill Inc. maintains identical electrical specifications (150mA, 30VDC), mechanical dimensions, and contact materials. The primary distinction is product status: 76RSB03T is active production, whereas 76RSB03 is obsolete. Packaging differs (tube versus bulk), and RoHS compliance status differs (76RSB03T is RoHS3 compliant; 76RSB03 is non-compliant).

Similar Substitute: The TE Connectivity ALCOSWITCH 3-435668-3 shares the same circuit topology (SPST), position count (3), actuator configuration (rocker, flush-recessed), mounting type (through hole), and pitch (0.100"). However, this part operates at reduced electrical ratings: 60mA at 5VDC versus 150mA at 30VDC. The 3-435668-3 includes additional features (tape seal, washable contacts) and operates across a wider temperature range (-55°C to 105°C). This part is suitable only for applications with lower voltage and current requirements.

Parameter Comparison

Parameter	76RSB03 (Main)	76RSB03T (Direct Equivalent)	3-435668-3 (Similar Substitute)
Manufacturer	Grayhill Inc.	Grayhill Inc.	TE Connectivity ALCOSWITCH
Circuit Configuration	SPST	SPST	SPST
Number of Positions	3	3	3
Current Rating	150mA	150mA	60mA
Voltage Rating	30VDC	30VDC	5VDC
Actuator Type	Rocker	Rocker	Rocker
Actuator Level	Flush, Recessed	Flush, Recessed	Flush, Recessed
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy
Contact Finish	Gold	Gold	Gold
Height Above Board	0.292" (7.41mm)	0.292" (7.41mm)	0.290" (7.37mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Length	0.380" (9.65mm)	0.380" (9.65mm)	0.380" (9.65mm)
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-55°C to 105°C
Mechanical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	RoHS3 Compliant	Non-compliant
Packaging	Bulk	Tube	Tube

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Path): Select the 76RSB03T from Grayhill Inc. This part is the active production equivalent with identical electrical ratings (150mA, 30VDC), mechanical dimensions, and contact specifications. The 76RSB03T is RoHS3 compliant, addressing regulatory requirements that the obsolete 76RSB03 does not meet. Packaging is supplied in tube format. This substitution requires no circuit redesign or electrical re-evaluation.

For Reduced-Specification Applications: The TE Connectivity ALCOSWITCH 3-435668-3 is suitable only for circuits operating at 5VDC with maximum current draw not exceeding 60mA. This part is active production and offers extended temperature range capability (-55°C to 105°C). The 3-435668-3 includes washable contact features and tape seal packaging. This substitution is valid only when application voltage and current requirements are confirmed to be within the 5VDC/60mA limits.

Compliance Considerations: The 76RSB03 is RoHS non-compliant and REACH unaffected. The 76RSB03T achieves RoHS3 compliance. The 3-435668-3 is RoHS non-compliant but REACH affected. For applications subject to RoHS requirements, the 76RSB03T is the mandated selection.

Frequently Asked Questions (FAQ)

Q: Can the 76RSB03T be used as a direct drop-in replacement for the 76RSB03?

A: Yes. The 76RSB03T is electrically and mechanically identical to the 76RSB03. Both parts share the same SPST circuit, 3-position configuration, 150mA/30VDC ratings, rocker actuator geometry, through-hole mounting, 0.100" pitch, and PC pin termination. No circuit modifications are required. The primary differences are product status (active versus obsolete) and RoHS compliance (RoHS3 versus non-compliant).

Q: What are the limitations of the TE Connectivity 3-435668-3 as a substitute?

A: The 3-435668-3 operates at significantly reduced electrical ratings: 60mA maximum current and 5VDC maximum voltage, compared to the 76RSB03 specifications of 150mA and 30VDC. This part is suitable only for low-voltage, low-current applications. The mechanical form factor (actuator type, pitch, mounting) is compatible, but electrical compatibility must be verified against circuit requirements before selection.

Q: Does packaging format affect electrical performance?

A: No. The 76RSB03 is supplied in bulk packaging, while the 76RSB03T is supplied in tube packaging. Packaging format does not affect electrical characteristics, performance, or reliability. Selection between bulk and tube packaging is determined by procurement and assembly process requirements.

Q: Are there temperature range differences between the main part and substitutes?

A: Yes. The 76RSB03 and 76RSB03T both operate from -40°C to 85°C. The TE Connectivity 3-435668-3 operates from -55°C to 105°C, providing extended low-temperature and high-temperature capability. For applications requiring operation outside the -40°C to 85°C range, the 3-435668-3 is suitable only if its reduced electrical ratings (60mA, 5VDC) meet circuit requirements.

Q: What is the significance of the RoHS compliance difference?

A: The 76RSB03 is RoHS non-compliant; the 76RSB03T is RoHS3 compliant. RoHS3 compliance indicates the part meets restrictions on hazardous substances in electrical and electronic equipment. For applications or markets subject to RoHS regulations, the 76RSB03T must be selected. The 76RSB03 cannot be used in RoHS-regulated applications.

Q: Can the 3-435668-3 be used in a 30VDC circuit?

A: No. The 3-435668-3 is rated for 5VDC maximum. Applying 30VDC to this part exceeds its voltage rating and will cause component failure. This part is not a suitable substitute for applications requiring 30VDC operation.

Q: Are the mechanical dimensions identical across all three parts?

A: Substantially yes. The 76RSB03, 76RSB03T, and 3-435668-3 all share the same length (0.380"), pitch (0.100"), and nearly identical height above board (0.292" versus 0.290"). These dimensional similarities ensure compatible PCB footprints and mounting positions. Minor height variation (0.002") is negligible for through-hole assembly.

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