Grayhill 25LR11-Q-Z Rotary Encoder Mechanical 32PPR: Equivalent & Substitute Parts

Part Overview

The Grayhill 25LR11-Q-Z is an active mechanical rotary encoder with 32 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 is RoHS Compliant and REACH Unaffected, with a rotational life rating of 100,000 cycles minimum. Substitute parts are identified based on matching encoder type, output type, mounting configuration, and mechanical compatibility while accommodating variations in pulse resolution and rotational life specifications.

Substiute Parts

25LR11-Q-Z

Grayhill Inc.In Stock: 75825LR11-Q-Z Datasheet

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25LB11-Q

Grayhill Inc.In Stock: 106725LB11-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 25LR11-Q-Z are identified based on strict compatibility criteria within the mechanical rotary encoder category. The primary substitution parameters are:

Critical Matching Parameters:

• Encoder Type: Mechanical
• Output Type: Quadrature (Incremental)
• Actuator Type: 1/4" Dia Flatted End
• Detent: Yes
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin

Variable Parameters (Allowed to Differ):

• Pulses per Revolution (PPR): 8, 12, 16, 20, 24, or 32
• Rotational Life: 100K or 200K cycles minimum
• Manufacturer: Grayhill Inc. or Bourns Inc.
• RoHS Status: RoHS Compliant or ROHS3 Compliant

Substitutes are grouped into two categories: Grayhill 25L series variants with different PPR ratings, and the Bourns ECW1D series offering equivalent mechanical and electrical specifications with extended rotational life.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same PPR): The 25LB11-Q is the direct equivalent to the 25LR11-Q-Z, maintaining identical 32 PPR specification. Both parts are mechanically and electrically compatible. The 25LB11-Q carries ROHS3 Compliant status compared to RoHS Compliant for the main part, with higher inventory availability (1020 units versus 703 units).

Alternative PPR Selections (Grayhill 25L Series): The Grayhill 25L series provides mechanical rotary encoders with PPR options of 8, 12, 16, 20, 24, and 32. All variants maintain identical mechanical form factor, detent operation, mounting configuration, and PC pin termination. Selection among these alternatives depends on application-specific resolution requirements. All Grayhill 25L substitutes carry ROHS3 Compliant status and 100K rotational life minimum.

Cross-Manufacturer Alternative (Bourns ECW1D Series): The Bourns ECW1D-C24-BC0024L offers mechanical rotary encoder functionality with 24 PPR output. This part maintains compatibility with panel and PCB through-hole mounting, vertical orientation, and PC pin termination. The ECW1D series provides extended rotational life of 200K cycles minimum compared to 100K for the Grayhill 25L series. ROHS3 Compliant status and REACH Unaffected certification apply.

Compliance and Regulatory Status: All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification. RoHS compliance is present across all options (RoHS Compliant or ROHS3 Compliant). Moisture Sensitivity Level 1 (Unlimited) applies uniformly. HTSUS code 8543.70.4500 is consistent across all parts.

Frequently Asked Questions (FAQ)

Q: Can the 25LB11-Q directly replace the 25LR11-Q-Z?

A: Yes. The 25LB11-Q is a direct mechanical and electrical equivalent with identical 32 PPR specification, actuator type, detent mechanism, mounting configuration, and termination style. The primary difference is packaging designation (Bulk versus standard) and RoHS compliance variant (ROHS3 versus RoHS Compliant).

Q: What is the impact of selecting a different PPR rating from the 25L series?

A: PPR (Pulses per Revolution) determines the resolution of rotational position feedback. Lower PPR values (8, 12, 16, 20, 24) provide coarser resolution with fewer pulses per complete rotation. Higher PPR values provide finer resolution. Selection must align with application requirements for position sensing accuracy. All 25L series variants maintain identical mechanical compatibility and mounting characteristics.

Q: How does the Bourns ECW1D-C24-BC0024L differ from Grayhill alternatives?

A: The ECW1D-C24-BC0024L is a cross-manufacturer substitute offering 24 PPR output with extended rotational life of 200K cycles minimum (versus 100K for Grayhill 25L series). Mechanical form factor, detent operation, mounting type, and termination style remain compatible. Manufacturer-specific design differences may exist in internal construction and performance characteristics.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either RoHS Compliant or ROHS3 Compliant status. Both designations satisfy RoHS directive requirements. ROHS3 Compliant represents the current RoHS 3 standard (Directive 2011/65/EU as amended).

Q: What is the significance of rotational life ratings?

A: Rotational life (measured in cycles minimum) indicates the mechanical durability specification. The main part and Grayhill 25L series are rated for 100K cycles minimum. The Bourns ECW1D series is rated for 200K cycles minimum, indicating extended mechanical durability for high-cycle applications.

Q: Can PPR be changed without affecting mounting compatibility?

A: Yes. All Grayhill 25L series variants (8, 12, 16, 20, 24, 32 PPR) share identical mechanical specifications including actuator type, detent mechanism, mounting type (Panel, PCB Through Hole), orientation (Vertical), and termination style (PC Pin). PPR selection is independent of physical mounting compatibility.

Q: What packaging options are available?

A: The main part 25LR11-Q-Z is supplied in standard packaging. Substitute parts 25LB11-Q, 25LB15-Q, 25LB15-Q-Z, 25LB18-Q, 25LB22-Q, 25LB30-Q, 25LB45-Q, and ECW1D-C24-BC0024L are supplied in Bulk packaging. Packaging designation does not affect electrical or mechanical performance.

Q: Are all parts REACH Unaffected?

A: Yes. All parts listed carry REACH Unaffected status, indicating compliance with REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations.

Q: What is Moisture Sensitivity Level 1?

A: Moisture Sensitivity Level (MSL) 1 indicates Unlimited shelf life without special moisture control requirements. This applies uniformly across all parts, indicating robust packaging and storage stability.