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

Part Overview

The Grayhill 25LR15-Q 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 25LR15-Q is ROHS3 compliant and REACH unaffected, with a rotational life rating of 100,000 cycles minimum. Substitute parts are identified for applications requiring alternative PPR specifications within the same mechanical and electrical parameter envelope, or for sourcing flexibility from alternative manufacturers.

Substiute Parts

25LR15-Q

Grayhill Inc.In Stock: 91425LR15-Q Datasheet

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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 for the 25LR15-Q are classified into two categories based on substitution criteria:

Category 1: Direct Electrical and Mechanical Equivalents (24 PPR) Parts 25LB15-Q, 25LB15-Q-Z, and ECW1D-C24-BC0024L maintain identical pulses per revolution (24 PPR), output type (quadrature incremental), actuator geometry (1/4" dia flatted end), detent function, mounting configuration (panel and PCB through-hole), orientation (vertical), and termination style (PC pin). These parts are interchangeable where the 25LR15-Q specification is required. The Grayhill 25LB15-Q and 25LB15-Q-Z differ only in packaging designation. The Bourns ECW1D-C24-BC0024L provides equivalent functionality with extended rotational life (200K cycles vs. 100K cycles).

Category 2: Alternative PPR Specifications (Same Mechanical Platform) Parts 25LB18-Q (20 PPR), 25LB22-Q (16 PPR), 25LB30-Q (12 PPR), and 25LB45-Q (8 PPR) maintain all mechanical and mounting parameters identical to the 25LR15-Q but with reduced pulses per revolution. These parts are substitutable only in applications where the encoder resolution requirement permits lower PPR operation. All parts share the same series designation (25L), actuator type, detent mechanism, mounting configuration, orientation, and termination style.

Key Parameters Determining Substitution: Pulses per Revolution (PPR), Output Type (Quadrature Incremental), Actuator Type (1/4" Dia Flatted End), Mounting Type (Panel, PCB Through Hole), Orientation (Vertical), Termination Style (PC Pin), Detent Function (Yes).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (24 PPR Requirement): The 25LB15-Q and 25LB15-Q-Z are direct functional equivalents to the 25LR15-Q, maintaining identical electrical and mechanical specifications. Both parts are active products with ROHS3 compliance and REACH unaffected status. Selection between these three Grayhill variants depends on packaging availability and inventory requirements.

The Bourns ECW1D-C24-BC0024L provides equivalent 24 PPR quadrature output with identical mechanical interface and mounting configuration. This part offers extended rotational life (200K cycles vs. 100K cycles) and maintains ROHS3 compliance and REACH unaffected status. The ECW1D-C24-BC0024L is suitable for applications requiring higher cycle durability within the same form factor.

Alternative Resolution Selection (Lower PPR): The 25LB18-Q (20 PPR), 25LB22-Q (16 PPR), 25LB30-Q (12 PPR), and 25LB45-Q (8 PPR) are substitutable only when application requirements permit reduced encoder resolution. All alternative PPR variants maintain identical mechanical platform, mounting configuration, detent function, and termination style. Selection of lower PPR variants is determined by application-specific resolution tolerance and rotational speed requirements. All alternative PPR parts are active products with ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the 25LB15-Q replace the 25LR15-Q directly? A: Yes. The 25LB15-Q is a direct functional equivalent with identical pulses per revolution (24 PPR), output type (quadrature incremental), actuator geometry (1/4" dia flatted end), detent mechanism, mounting configuration (panel and PCB through-hole), orientation (vertical), and PC pin termination. Both parts are active Grayhill products with ROHS3 compliance.

Q: What is the difference between 25LB15-Q and 25LB15-Q-Z? A: Both parts are functionally identical with 24 PPR quadrature output and identical mechanical specifications. The designation difference reflects packaging or internal configuration variants. Both are active products suitable for direct substitution.

Q: Can I use the ECW1D-C24-BC0024L as a substitute for the 25LR15-Q? A: Yes. The ECW1D-C24-BC0024L maintains identical 24 PPR quadrature output, 1/4" dia flatted end actuator, detent function, panel and PCB through-hole mounting, vertical orientation, and PC pin termination. The Bourns part offers extended rotational life (200K cycles vs. 100K cycles) and is ROHS3 compliant and REACH unaffected.

Q: When can I use the 25LB30-Q (12 PPR) instead of the 25LR15-Q (24 PPR)? A: The 25LB30-Q is substitutable only when application requirements permit half the encoder resolution. The 12 PPR output provides coarser position resolution compared to 24 PPR. All other mechanical and electrical parameters remain identical. Substitution requires confirmation that the lower resolution meets application accuracy and speed requirements.

Q: Are all substitute parts panel and PCB through-hole mountable? A: Yes. All listed substitute parts maintain identical mounting configuration: panel and PCB through-hole. All parts feature vertical orientation with 1/4" dia flatted end actuator and PC pin termination.

Q: Do all substitute parts have detent function? A: Yes. All substitute parts listed maintain detent mechanism identical to the 25LR15-Q. Detent function is consistent across all PPR variants within the 25L series and the Bourns ECW1D series.

Q: What is the rotational life difference between the 25LR15-Q and ECW1D-C24-BC0024L? A: The 25LR15-Q is rated for 100,000 cycles minimum rotational life. The ECW1D-C24-BC0024L is rated for 200,000 cycles minimum. Both parts maintain identical mechanical interface and electrical output specifications. The extended cycle rating of the Bourns part provides higher durability for high-frequency rotation applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the 25LR15-Q.