Equivalent & Substitute Parts for Grayhill 78RB09S DIP Switch

Part Overview

The Grayhill 78RB09S is a 9-position slide DIP switch with SPST circuit configuration, rated for 150mA at 30VDC. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part features through-hole mounting with gold-plated copper alloy contacts, flush/recessed slide actuator, and operates across the industrial temperature range of -40°C to 85°C.

Substiute Parts

78RB09S

Grayhill Inc.In Stock: 114878RB09S Datasheet

Current PartRFQ

78RB09ST

Grayhill Inc.In Stock: 225978RB09ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78RB09S is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Circuit type: SPST (Single Pole Single Throw)
• Number of positions: 9
• Current rating: 150mA minimum
• Voltage rating: 30VDC minimum

Mechanical Compatibility Requirements:

• Actuator type: Slide (Standard)
• Mounting type: Through Hole
• Pitch: 0.100" (2.54mm)
• Height above board: 0.265" (6.73mm)
• Termination style: PC Pin

Environmental Requirements:

• Operating temperature range: -40°C to 85°C
• Contact material: Copper Alloy with Gold finish
• Mechanical life: 2,000 Cycles minimum
• Electrical life: 2,000 Cycles minimum

The 78RB09ST meets all specified parameters and is identified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The 78RB09ST is a direct functional equivalent to the 78RB09S across all critical electrical and mechanical parameters. Selection of the 78RB09ST is supported by the following factors:

Product Status: The 78RB09ST carries Active product status, ensuring continued manufacturer support and availability, whereas the 78RB09S is classified as Obsolete.

Regulatory Compliance: The 78RB09ST achieves ROHS3 compliance, providing improved environmental and regulatory alignment compared to the non-compliant 78RB09S. Both parts maintain REACH Unaffected status and EAR99 export classification.

Electrical and Mechanical Equivalence: All functional parameters—circuit configuration, position count, current and voltage ratings, actuator type, mounting configuration, and lifecycle specifications—are identical between the two parts.

Packaging Consideration: The 78RB09ST is supplied in Tube packaging, whereas the 78RB09S was supplied in bulk format. This represents a packaging format change only and does not affect component functionality or performance.

Inventory Status: The 78RB09ST maintains higher inventory availability (2,200 pcs) compared to the 78RB09S (1,082 pcs), supporting procurement continuity.

Frequently Asked Questions (FAQ)

Q: Can the 78RB09ST be used as a direct replacement for the 78RB09S in existing designs?

A: Yes. The 78RB09ST is electrically and mechanically identical to the 78RB09S. All functional parameters, including circuit configuration, position count, current/voltage ratings, actuator type, mounting configuration, and operating temperature range are equivalent. Direct substitution is supported without design modification.

Q: What is the difference between the 78RB09S and 78RB09ST?

A: The primary differences are product status and regulatory compliance. The 78RB09S is Obsolete and RoHS non-compliant, while the 78RB09ST is Active and ROHS3 compliant. Packaging format differs (bulk versus tube), but electrical and mechanical specifications are identical.

Q: Does the packaging change from bulk to tube affect component performance?

A: No. Packaging format is a supply chain consideration only and does not affect electrical performance, mechanical characteristics, or functional operation of the component.

Q: Are there any electrical parameter differences between these parts?

A: No. Both parts are rated for 150mA at 30VDC with SPST circuit configuration and 9 positions. Current rating, voltage rating, mechanical life, and electrical life specifications are identical.

Q: Is the 78RB09ST suitable for applications requiring RoHS compliance?

A: Yes. The 78RB09ST is ROHS3 compliant, making it suitable for applications with RoHS compliance requirements. The 78RB09S is RoHS non-compliant.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Height above board (0.265"), length (0.980"), pitch (0.100"), and all other dimensional specifications are identical. PCB layout and mounting hole patterns are compatible.

Q: What is the base product number for these parts?

A: The base product number is 78RB09. Both the 78RB09S and 78RB09ST are variants within this product family.