Grayhill 25LR10-Q Rotary Encoder Mechanical 36PPR: Equivalent & Substitute Parts

Part Overview

The Grayhill 25LR10-Q is a mechanical rotary encoder with 36 pulses per revolution (PPR), quadrature output, and vertical orientation. This component is classified as Active product status and is RoHS Compliant. The 25LR10-Q features a 1/4" diameter flatted end actuator, panel and PCB through-hole mounting capability, and PC pin termination. With 100,000 cycles minimum rotational life and detent functionality, this encoder serves applications requiring precise incremental position feedback.

Substitute parts are necessary when addressing inventory constraints, lead time requirements, or when alternative PPR configurations better match application-specific resolution needs within the same mechanical and electrical parameter envelope.

Substiute Parts

25LR10-Q

Grayhill Inc.In Stock: 105325LR10-Q Datasheet

Current PartRFQ

25LB10-Q

Grayhill Inc.In Stock: 179925LB10-Q Datasheet

SimilarRFQ

25LB11-Q

Grayhill Inc.In Stock: 106725LB11-Q Datasheet

SimilarRFQ

25LB15-Q

Grayhill Inc.In Stock: 163925LB15-Q Datasheet

SimilarRFQ

25LB15-Q-Z

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

SimilarRFQ

25LB18-Q

Grayhill Inc.In Stock: 104925LB18-Q Datasheet

SimilarRFQ

25LB22-Q

Grayhill Inc.In Stock: 202525LB22-Q Datasheet

SimilarRFQ

25LB30-Q

Grayhill Inc.In Stock: 113825LB30-Q Datasheet

SimilarRFQ

25LB45-Q

Grayhill Inc.In Stock: 111925LB45-Q Datasheet

SimilarRFQ

ECW1D-C24-BC0024L

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25LR10-Q is determined by strict alignment of the following parameters:

Fixed Parameters (Non-Negotiable for Direct Substitution):

• Encoder Type: Mechanical
• Output Type: Quadrature (Incremental)
• Actuator Type: 1/4" Dia Flatted End
• Detent: Yes
• Built-in Switch: No
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

Variable Parameters (Allowed to Differ):

• Pulses per Revolution (PPR): 36, 32, 24, 20, 16, 12, or 8
• Rotational Life: 100K or 200K cycles
• RoHS Status: RoHS Compliant or ROHS3 Compliant
• Manufacturer: Grayhill Inc. or Bourns Inc.
• Series: 25L or ECW
• Packaging: Tube or Bulk

Substitute parts are grouped by PPR configuration. The 25LR10-Q (36 PPR) can be substituted with alternative Grayhill 25L series encoders offering different PPR values, or with the Bourns ECW1D-C24-BC0024L (24 PPR) when mechanical and electrical interfaces remain compatible.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same PPR): The 25LB10-Q is the direct equivalent to the 25LR10-Q, maintaining identical 36 PPR specification. Both components share all mechanical and electrical parameters. The 25LB10-Q carries ROHS3 Compliant certification versus RoHS Compliant for the 25LR10-Q, representing an updated compliance standard. Selection between these two parts depends on inventory availability and compliance documentation requirements.

Alternative PPR Configurations (Grayhill 25L Series): The 25LB11-Q (32 PPR), 25LB15-Q (24 PPR), 25LB15-Q-Z (24 PPR), 25LB18-Q (20 PPR), 25LB22-Q (16 PPR), 25LB30-Q (12 PPR), and 25LB45-Q (8 PPR) are mechanically and electrically compatible substitutes when application firmware or signal processing can accommodate different resolution levels. All maintain identical mechanical interfaces, detent functionality, and mounting characteristics. All carry ROHS3 Compliant status.

Cross-Manufacturer Alternative: The Bourns ECW1D-C24-BC0024L provides a 24 PPR mechanical rotary encoder with identical mechanical and electrical interfaces. This part offers extended rotational life of 200K cycles versus 100K for the Grayhill series. Selection of this cross-manufacturer substitute is appropriate when higher cycle life requirements exist and 24 PPR resolution is acceptable.

Compliance Considerations: All substitute parts maintain MSL 1 (Unlimited) and REACH Unaffected status, ensuring compatibility with standard manufacturing and storage environments. ROHS3 Compliant parts represent current regulatory alignment and are preferred for new designs.

Frequently Asked Questions (FAQ)

Q: Can the 25LR10-Q be directly replaced with the 25LB10-Q?

A: Yes. The 25LB10-Q is a direct equivalent, maintaining identical 36 PPR specification and all mechanical parameters. The primary difference is updated ROHS3 Compliant certification. No design modifications are required.

Q: What determines whether a different PPR encoder can substitute for the 25LR10-Q?

A: PPR substitution is determined by application firmware capability. The mechanical interface, actuator type, mounting configuration, and termination style remain identical across all 25L series encoders. If the application controller can process different pulse counts through software configuration or firmware adjustment, alternative PPR values are mechanically and electrically compatible. The quadrature output format remains constant across all variants.

Q: Why would I select a lower PPR encoder such as the 25LB30-Q (12 PPR) instead of the 25LR10-Q (36 PPR)?

A: Lower PPR encoders are selected when application resolution requirements are less stringent or when system cost optimization is a priority. The 25LB30-Q provides coarser angular resolution but maintains identical mechanical robustness and detent functionality. Selection depends on the minimum resolution threshold required by the application.

Q: Is the Bourns ECW1D-C24-BC0024L a suitable substitute for the 25LR10-Q?

A: The ECW1D-C24-BC0024L is mechanically and electrically compatible when 24 PPR resolution is acceptable. This part offers 200K cycle rotational life versus 100K for the 25LR10-Q, providing extended operational durability. Cross-manufacturer substitution requires verification of any application-specific firmware or signal processing dependencies on the Grayhill encoder characteristics.

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

A: Both parts are identical 24 PPR mechanical rotary encoders with matching mechanical and electrical specifications. The "-Z" suffix indicates a packaging or configuration variant. Both are mechanically and electrically interchangeable. Selection between these variants depends on inventory availability and any specific application requirements tied to the suffix designation.

Q: Are all substitute parts RoHS and REACH compliant?

A: All substitute parts listed maintain REACH Unaffected status. RoHS compliance is present in all parts: the 25LR10-Q carries RoHS Compliant certification, while all 25L series substitutes and the Bourns ECW1D-C24-BC0024L carry ROHS3 Compliant certification, representing current regulatory standards.

Q: Can I use a 25L series encoder with different PPR in an existing PCB design without layout modifications?

A: Yes. All 25L series encoders maintain identical mechanical dimensions, actuator specifications, mounting hole patterns, and PC pin termination. PCB layout remains unchanged. Only firmware or signal processing software requires adjustment to accommodate different PPR values.

Q: What is the minimum rotational life specification across all substitute options?

A: The minimum rotational life is 100K cycles, specified for the 25LR10-Q and all Grayhill 25L series substitutes. The Bourns ECW1D-C24-BC0024L provides extended 200K cycle life. Selection of higher cycle-life components is appropriate for applications with extended operational duty cycles.