Grayhill 25LR30-Q Rotary Encoder: Equivalent & Substitute Parts

Part Overview

The Grayhill 25LR30-Q is a mechanical rotary encoder with 12 pulses per revolution (PPR) quadrature output, designed for panel and PCB through-hole mounting in vertical orientation. This encoder features a 1/4" diameter flatted end actuator with detent positioning and PC pin termination. The product is Active status and RoHS Compliant, making it suitable for applications requiring incremental position feedback in industrial and commercial equipment.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the Grayhill 25L series, allowing for component interchangeability based on specific application requirements and packaging availability.

Substiute Parts

25LR30-Q

Grayhill Inc.In Stock: 112625LR30-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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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 25LR30-Q are identified based on strict parameter matching within the Grayhill 25L encoder series. The substitution logic is based on the following critical parameters:

Primary Matching Criteria:

• 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
• Rotational Life: 100K cycles minimum
• Series: 25L

Substitution Categories:

Category 1 - Direct Electrical Equivalent (12 PPR): The 25LB30-Q maintains identical pulses per revolution (12 PPR) and all critical mechanical and electrical parameters. The primary difference is packaging format (Bulk vs. standard packaging) and RoHS compliance variant (ROHS3 vs. RoHS Compliant). This part is a direct functional substitute.

Category 2 - Alternative Resolution (8 PPR): The 25LB45-Q operates at 8 pulses per revolution instead of 12 PPR. All other mechanical and electrical parameters remain consistent with the main part. This substitute is applicable only when the application can accommodate the lower resolution output.

Parameter Comparison

Engineering Selection Recommendations

For 25LB30-Q Selection: The 25LB30-Q is suitable as a direct substitute for the 25LR30-Q when packaging format flexibility is acceptable. Both parts maintain identical electrical resolution (12 PPR) and mechanical specifications. The 25LB30-Q carries ROHS3 Compliant certification compared to the main part's RoHS Compliant status, both meeting regulatory requirements. Selection between these parts depends on packaging requirements and supply chain availability rather than functional performance.

For 25LB45-Q Selection: The 25LB45-Q operates at 8 PPR resolution and is suitable only when the application design accommodates lower encoder resolution. All mechanical mounting, orientation, and termination characteristics remain identical to the main part. This substitute is applicable in applications where 8 PPR output meets system requirements and higher resolution is not necessary.

Compliance Considerations: All three parts maintain Active product status, unlimited moisture sensitivity rating (MSL 1), and REACH Unaffected classification. Both substitute parts carry ROHS3 Compliant certification, meeting current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the 25LB30-Q directly replace the 25LR30-Q in existing designs?

A: Yes. The 25LB30-Q maintains identical electrical output (12 PPR quadrature), mechanical specifications (1/4" flatted end actuator, detent, vertical orientation), mounting type (panel and PCB through-hole), and termination style (PC pin). The primary difference is packaging format. Both parts are Active status with equivalent regulatory compliance.

Q: What is the key difference between the 25LR30-Q and 25LB45-Q?

A: The 25LB45-Q operates at 8 pulses per revolution compared to the 25LR30-Q's 12 PPR. All other parameters—mechanical design, mounting, orientation, detent function, and termination—are identical. Selection of the 25LB45-Q requires confirmation that the application can function with lower encoder resolution.

Q: Are there supply or packaging differences between these substitutes?

A: The 25LR30-Q is supplied in standard packaging, while the 25LB30-Q is supplied in Bulk packaging. Both 25LB30-Q and 25LB45-Q are available in Bulk format. Packaging selection depends on procurement and assembly requirements.

Q: Do all three parts meet the same regulatory requirements?

A: All three parts are Active status products with MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected classification. The 25LR30-Q is RoHS Compliant, while both 25LB30-Q and 25LB45-Q are ROHS3 Compliant. Both compliance levels meet current regulatory standards.

Q: What is the rotational life specification for these encoders?

A: All three parts specify a minimum rotational life of 100,000 cycles, ensuring consistent mechanical durability across the substitution options.

Q: Can the 25LB45-Q be used in applications designed for 12 PPR output?

A: No. The 25LB45-Q provides 8 PPR output and cannot be used in applications requiring 12 PPR resolution without firmware or hardware modifications to accommodate the lower resolution signal.