Grayhill 25LB45-Q-Z Rotary Encoder Mechanical 8PPR Equivalent & Substitute Parts

Part Overview

The Grayhill 25LB45-Q-Z is an active mechanical rotary encoder with 8 pulses per revolution (PPR) quadrature output. This vertical-mount encoder features a 1/4" diameter flatted end actuator with detent positioning and is designed for panel and PCB through-hole mounting applications. The encoder delivers incremental position feedback through quadrature output signals, making it suitable for applications requiring precise rotational measurement and control.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the product line, ensuring functional interchangeability without design modification.

Substiute Parts

25LB45-Q-Z

Grayhill Inc.In Stock: 110925LB45-Q-Z Datasheet

Current PartRFQ

25LB45-Q

Grayhill Inc.In Stock: 111925LB45-Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 25LB45-Q-Z are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain constant:

• Encoder Type: Mechanical
• Output Type: Quadrature (Incremental)
• Pulses per Revolution: 8
• Actuator Type: 1/4" Dia Flatted End
• Detent Function: Yes
• Mounting Configuration: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin
• Rotational Life Minimum: 100K cycles
• Series Family: 25L

Parts meeting all these criteria are classified as direct substitutes. Variations in any of these parameters result in functional or mechanical incompatibility and are not included in the substitute list.

Parameter Comparison

Engineering Selection Recommendations

Both the 25LB45-Q-Z and 25LB45-Q are active products manufactured by Grayhill Inc. and maintain identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than functional differences.

Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

The identical ECCN classification (EAR99) and HTSUS code (8543.70.4500) confirm equivalent regulatory treatment for export and tariff purposes.

Frequently Asked Questions (FAQ)

Q: Can the 25LB45-Q be used as a direct replacement for the 25LB45-Q-Z?

A: Yes. Both parts are mechanically and electrically equivalent. All critical parameters including encoder type, output configuration, PPR rating, actuator geometry, mounting specifications, and rotational life are identical. No circuit design or mechanical modifications are required.

Q: What are the key parameters that determine substitutability for this encoder?

A: Substitutability is determined by equivalence in: mechanical encoder type, quadrature output format, 8 PPR resolution, 1/4" flatted end actuator, detent function, panel and PCB through-hole mounting capability, vertical orientation, PC pin termination, and 100K cycle minimum rotational life.

Q: Are there packaging differences between the 25LB45-Q-Z and 25LB45-Q?

A: Both parts are supplied in bulk packaging. No packaging format differences affect substitutability.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 25LB45-Q-Z and 25LB45-Q are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding.

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

A: Both parts are rated for a minimum of 100,000 rotational cycles, ensuring durability in continuous-duty applications.

Q: Are there any supply or inventory considerations when selecting between these parts?

A: The 25LB45-Q-Z has 1060 pieces in stock, while the 25LB45-Q has 1024 pieces in stock. Selection may be based on immediate availability requirements.