Grayhill 25LR15-Q-Z Rotary Encoder Mechanical 24PPR Equivalent & Substitute Parts

Part Overview

The Grayhill 25LR15-Q-Z is an active mechanical rotary encoder with 24 pulses per revolution (PPR) in quadrature (incremental) output configuration. This vertical-orientation encoder features a 1/4" diameter flatted end actuator, detent mechanism, and PC pin termination for panel and PCB through-hole mounting applications. The part maintains active product status with 726 units in current inventory. Substitute parts are identified based on matching electrical output characteristics, mechanical form factors, and compliance certifications to support component availability and supply chain flexibility.

Substiute Parts

25LR15-Q-Z

Grayhill Inc.In Stock: 76525LR15-Q-Z Datasheet

Current PartRFQ

25LB15-Q

Grayhill Inc.In Stock: 163925LB15-Q Datasheet

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25LB15-Q-Z

Grayhill Inc.In Stock: 76225LB15-Q-Z Datasheet

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25LB18-Q

Grayhill Inc.In Stock: 104925LB18-Q Datasheet

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25LB22-Q

Grayhill Inc.In Stock: 202525LB22-Q Datasheet

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25LB30-Q

Grayhill Inc.In Stock: 113825LB30-Q Datasheet

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25LB45-Q

Grayhill Inc.In Stock: 111925LB45-Q Datasheet

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ECW1D-C24-BC0024L

Bourns Inc.In Stock: 1167ECW1D-C24-BC0024L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the 25LR15-Q-Z:

Category 1: Direct Electrical Equivalents (24 PPR) Parts maintaining identical 24 pulses per revolution output with matching mechanical specifications (1/4" flatted end actuator, detent, vertical orientation, PC pin termination, panel/PCB through-hole mounting). These parts are interchangeable without circuit modification:

• 25LB15-Q (Grayhill, Bulk packaging)
• 25LB15-Q-Z (Grayhill, Bulk packaging)
• ECW1D-C24-BC0024L (Bourns, Bulk packaging)

Category 2: Alternative Resolution Options (Different PPR) Parts sharing identical mechanical form factor, mounting configuration, and output type but with different pulse-per-revolution specifications. These require circuit-level evaluation for resolution compatibility:

• 25LB30-Q (12 PPR)
• 25LB22-Q (16 PPR)
• 25LB18-Q (20 PPR)
• 25LB45-Q (8 PPR)

All substitute parts maintain mechanical compatibility through shared actuator type, detent mechanism, mounting style, and termination configuration. Substitution eligibility is determined by matching output type (Quadrature Incremental), encoder type (Mechanical), and physical form factor parameters.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (24 PPR Category):

The 25LB15-Q and 25LB15-Q-Z (Grayhill) are direct electrical and mechanical equivalents to the 25LR15-Q-Z. Both parts maintain identical output resolution (24 PPR), actuator geometry, detent operation, and mounting configuration. The 25LB15-Q offers higher inventory availability (1555 units) compared to the primary part. Both substitute parts carry ROHS3 compliance certification, meeting current regulatory requirements.

The ECW1D-C24-BC0024L (Bourns) provides an alternative 24 PPR mechanical encoder with identical electrical output characteristics and mechanical form factor. This part features extended rotational life specification (200K cycles minimum versus 100K cycles), providing enhanced durability for high-cycle applications. ROHS3 compliance is maintained. Inventory availability is 1155 units.

Alternative Resolution Selection (Different PPR Category):

Parts with alternative PPR specifications (25LB30-Q at 12 PPR, 25LB22-Q at 16 PPR, 25LB18-Q at 20 PPR, 25LB45-Q at 8 PPR) maintain mechanical compatibility but require circuit-level evaluation. These parts are suitable only when application requirements permit resolution adjustment. All alternative resolution parts carry ROHS3 compliance and maintain identical mechanical mounting characteristics.

All identified substitute parts maintain RoHS and REACH compliance status consistent with regulatory requirements for the primary part.

Frequently Asked Questions (FAQ)

Q: Can 25LB15-Q replace 25LR15-Q-Z directly in production?

A: Yes. The 25LB15-Q maintains identical electrical output (24 PPR quadrature), mechanical form factor (1/4" flatted end actuator, detent, vertical orientation), mounting configuration (panel and PCB through-hole), and termination style (PC pin). No circuit modification is required. Both parts are RoHS compliant and REACH unaffected.

Q: What is the difference between 25LR15-Q-Z and 25LB15-Q-Z?

A: Both parts are 24 PPR mechanical rotary encoders with identical electrical and mechanical specifications. The primary difference is packaging designation and RoHS certification level (RoHS Compliant versus ROHS3 Compliant). Functional performance and compatibility are equivalent.

Q: Can I use ECW1D-C24-BC0024L as a substitute for 25LR15-Q-Z?

A: Yes. The ECW1D-C24-BC0024L (Bourns) is a direct electrical equivalent with 24 PPR output and matching mechanical specifications. The primary advantage is extended rotational life (200K cycles minimum versus 100K cycles). Mounting, termination, and compliance characteristics are compatible.

Q: What happens if I use a different PPR encoder like 25LB30-Q (12 PPR)?

A: The 25LB30-Q maintains mechanical compatibility but provides half the output resolution (12 PPR versus 24 PPR). This requires circuit-level evaluation to confirm the application can function with reduced resolution. The encoder maintains identical mechanical form factor, detent operation, and mounting configuration.

Q: Are all substitute parts available in the same packaging as 25LR15-Q-Z?

A: The 25LR15-Q-Z is supplied in standard packaging. Direct equivalents 25LB15-Q, 25LB15-Q-Z, and ECW1D-C24-BC0024L are supplied in bulk packaging. Alternative resolution parts (25LB30-Q, 25LB22-Q, 25LB18-Q, 25LB45-Q) are also supplied in bulk packaging. Packaging differences do not affect functional compatibility.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All identified substitute parts carry either RoHS Compliant or ROHS3 Compliant certification. The 25LR15-Q-Z carries RoHS Compliant status; all substitute parts carry ROHS3 Compliant status, which represents current regulatory compliance standards.

Q: What is the inventory status for substitute parts?

A: 25LB15-Q: 1555 units; 25LB15-Q-Z: 707 units; ECW1D-C24-BC0024L: 1155 units; 25LB30-Q: 1060 units; 25LB22-Q: 1987 units; 25LB18-Q: 1022 units; 25LB45-Q: 1024 units. All parts are listed as active product status with new original stock.