Grayhill 94HCB08 Rotary DIP Switch Octal Equivalent & Substitute Parts

Part Overview

The Grayhill 94HCB08 is an octal rotary DIP switch designed for through-hole mounting applications requiring 8-position selection capability. This component features a rotary shaft actuator with sealed construction, rated for 100mA at 50VDC operation across an industrial temperature range of -40°C to 85°C.

The 94HCB08 carries an obsolete product status, making identification of compatible substitute components essential for ongoing production support, field repairs, and design continuity. Direct equivalent parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

94HCB08

Grayhill Inc.In Stock: 120194HCB08 Datasheet

Current PartRFQ

94HCB08T

Grayhill Inc.In Stock: 628294HCB08T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 94HCB08 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish the substitution criteria:

Electrical Parameters: Circuit configuration (Octal), current rating (100mA), and voltage rating (50VDC) must be identical. These parameters define the switch's load-handling capability and signal routing architecture.

Mechanical Parameters: Actuator type (Rotary with Shaft), mounting method (Through Hole), pitch spacing (0.100"), and height above board (0.395") must match exactly to ensure PCB layout compatibility and mechanical fit within existing enclosures.

Material & Environmental Parameters: Contact material (Copper Alloy), contact finish (Gold), sealed construction, and operating temperature range (-40°C to 85°C) must be maintained to preserve electrical performance and environmental protection.

Lifecycle Parameters: Mechanical life rating (10,000 cycles) establishes durability equivalence for equivalent duty cycle applications.

Parts meeting all these criteria are classified as direct electrical and mechanical equivalents suitable for one-to-one replacement without design modification.

Parameter Comparison

Engineering Selection Recommendations

The 94HCB08T is a direct functional equivalent to the 94HCB08 with superior compliance and availability characteristics.

For Obsolescence Management: The 94HCB08 carries obsolete product status with limited inventory (1,152 pcs). The 94HCB08T maintains active product status with significantly higher stock availability (6,193 pcs), ensuring supply continuity for production and field service applications.

For Regulatory Compliance: The 94HCB08T achieves RoHS3 compliance, whereas the 94HCB08 is RoHS non-compliant. Organizations subject to RoHS directives or customer requirements mandating RoHS compliance must transition to the 94HCB08T.

For Design Implementation: All electrical and mechanical parameters are identical between the two parts. The 94HCB08T requires no PCB layout modifications, no firmware changes, and no mechanical redesign. Direct substitution is supported at the component level.

For Procurement: The 94HCB08T is supplied in tube packaging, whereas the 94HCB08 uses bulk packaging. Procurement processes should account for packaging format differences in handling and storage procedures.

Frequently Asked Questions (FAQ)

Q: Can the 94HCB08T replace the 94HCB08 without PCB modifications?

A: Yes. All mechanical dimensions, mounting specifications, and pin pitch are identical. The 94HCB08T is a direct one-to-one replacement requiring no PCB layout changes.

Q: What is the primary reason to transition from 94HCB08 to 94HCB08T?

A: The 94HCB08 is obsolete with limited remaining inventory. The 94HCB08T is an active product with superior availability. Additionally, the 94HCB08T achieves RoHS3 compliance, addressing regulatory requirements not met by the 94HCB08.

Q: Are the electrical performance characteristics identical?

A: Yes. Both parts maintain 100mA current rating, 50VDC voltage rating, 8-position octal configuration, and -40°C to 85°C operating temperature range. Mechanical life (10,000 cycles) and sealed construction are identical.

Q: Does packaging format affect component functionality?

A: No. The 94HCB08T tube packaging and 94HCB08 bulk packaging contain functionally identical components. Packaging differences affect only logistics, storage, and handling procedures, not electrical or mechanical performance.

Q: Are both parts manufactured by Grayhill Inc.?

A: Yes. Both the 94HCB08 and 94HCB08T are manufactured by Grayhill Inc. and belong to the 94H series family.

Q: What certifications apply to both parts?

A: Both parts carry REACH Unaffected status and EAR99 ECCN classification. The 94HCB08T additionally achieves RoHS3 compliance. Both parts have MSL rating of 1 (Unlimited moisture sensitivity level).