Grayhill 25LB30-Q-Z Rotary Encoder Mechanical 12PPR Equivalent & Substitute Parts

Part Overview

The Grayhill 25LB30-Q-Z is an active mechanical rotary encoder with 12 pulses per revolution (PPR) quadrature output. This vertical-mount encoder features a 1/4" diameter flatted end actuator, detent mechanism, and PC pin termination for panel and PCB through-hole mounting applications. The encoder delivers 100,000 minimum rotational life cycles and operates without external power supply requirements. Substitute parts are identified when inventory constraints, lead time considerations, or application-specific resolution requirements necessitate alternative encoder models within the Grayhill 25L series.

Substiute Parts

25LB30-Q-Z

Grayhill Inc.In Stock: 104825LB30-Q-Z Datasheet

Current PartRFQ

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 25LB30-Q-Z are identified based on strict alignment with the following critical parameters: encoder type (mechanical), output type (quadrature incremental), actuator geometry (1/4" diameter flatted end), detent presence, mounting configuration (panel and PCB through-hole), orientation (vertical), termination style (PC pin), and rotational life specification (100K cycles minimum).

The 25LB30-Q shares all electrical and mechanical specifications with the main part 25LB30-Q-Z, differing only in packaging designation. The 25LB45-Q operates within the same 25L series with identical mechanical form factor, mounting, orientation, and termination characteristics but specifies 8 pulses per revolution instead of 12 PPR. Both substitute parts maintain ROHS3 compliance, MSL 1 rating, and 100K rotational life cycles.

Parameter Comparison

Engineering Selection Recommendations

25LB30-Q as Direct Substitute: The 25LB30-Q provides full electrical and mechanical interchangeability with the 25LB30-Q-Z. Both parts are active products with identical specifications across all functional parameters. Selection between these parts is determined by packaging and inventory availability rather than technical performance differences. Current inventory shows 1,060 units of 25LB30-Q available.

25LB45-Q as Resolution Alternative: The 25LB45-Q operates as a functional substitute when application requirements accommodate 8 PPR resolution instead of 12 PPR. This part maintains identical mechanical mounting, orientation, termination, and rotational life specifications. The 25LB45-Q is suitable for applications where lower angular resolution is acceptable or preferred. Current inventory shows 1,024 units available.

All three parts maintain active product status, ROHS3 compliance, and REACH unaffected designation, confirming ongoing manufacturer support and regulatory compliance for new designs and production applications.

Frequently Asked Questions (FAQ)

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

A: Yes. The 25LB30-Q and 25LB30-Q-Z are electrically and mechanically identical. Substitution is valid for all applications currently using the 25LB30-Q-Z.

Q: What is the primary difference between the 25LB30-Q-Z and 25LB45-Q?

A: The 25LB30-Q-Z provides 12 pulses per revolution, while the 25LB45-Q provides 8 pulses per revolution. All other mechanical and electrical parameters remain identical. Selection depends on the required angular resolution for the application.

Q: Are all three parts compatible with the same PCB through-hole footprint?

A: Yes. All three encoders feature identical 1/4" diameter flatted end actuators, PC pin termination, and vertical mounting orientation, confirming mechanical and electrical compatibility with the same PCB layout.

Q: Do these encoders require external power supply?

A: No. All three parts operate without external voltage supply requirements, as indicated by the voltage supply parameter designation.

Q: What is the minimum rotational life specification for all three parts?

A: All three encoders specify 100,000 cycles minimum rotational life.

Q: Are there any compliance or regulatory differences between the three parts?

A: No. All three parts maintain identical ROHS3 compliance, MSL 1 (Unlimited) rating, REACH unaffected status, and active product status.

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

A: The 25LB45-Q provides lower resolution (8 PPR vs. 12 PPR). Substitution is valid only when the application firmware or control logic can accommodate the reduced angular resolution output.