Grayhill 63KS128 Rotary Encoder Optical 512PPR - Equivalent & Substitute Parts

Part Overview

The Grayhill 63KS128 is an optical rotary encoder with 512 pulses per revolution, providing quadrature (incremental) output for precision rotational measurement applications. This vertical-mount, panel-mount encoder operates at 5V supply voltage with a 1/4" diameter flatted end actuator and PC pin termination. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, lead time requirements, or application-specific resolution needs necessitate alternative encoder models within the same product family.

Substiute Parts

63KS128

Grayhill Inc.In Stock: 110263KS128 Datasheet

Current PartRFQ

63K128

Grayhill Inc.In Stock: 96863K128 Datasheet

SimilarRFQ

63KS100

Grayhill Inc.In Stock: 118463KS100 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Grayhill 63KS128 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria (Must Match):

• Encoder Type: Optical
• Output Type: Quadrature (Incremental)
• Voltage - Supply: 5V
• Actuator Type: 1/4" Dia Flatted End
• Mounting Type: Panel Mount
• Orientation: Vertical
• Termination Style: PC Pin
• Rotational Life (Cycles Min): 300M minimum

Secondary Consideration (May Vary):

• Pulses per Revolution: Resolution differences are acceptable when application requirements permit lower resolution operation

The 63K128 and 63KS100 are grouped as direct substitutes because both maintain identical electrical, mechanical, and environmental specifications. The 63KS100 operates at 400 pulses per revolution versus the 63KS128's 512 PPR, representing a resolution reduction that is acceptable only in applications where lower encoder resolution meets functional requirements.

Parameter Comparison

Engineering Selection Recommendations

63K128 Selection: The 63K128 is a direct equivalent to the 63KS128, maintaining identical specifications across all electrical, mechanical, and environmental parameters. Both parts carry Active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Selection between these two parts is determined solely by inventory availability and lead time requirements, as no technical differentiation exists.

63KS100 Selection: The 63KS100 operates at 400 pulses per revolution compared to the 63KS128's 512 PPR. This represents a 21.9% reduction in encoder resolution. The 63KS100 is substitutable only when application firmware or mechanical design accommodates lower rotational resolution. All other specifications—supply voltage, actuator geometry, mounting configuration, termination style, rotational life, and compliance certifications—remain identical. The 63KS100 maintains Active product status with full ROHS3 compliance.

Compliance Basis: All three parts satisfy ROHS3 compliance requirements and carry REACH Unaffected status. Moisture sensitivity level (MSL 1) indicates unlimited shelf life without special storage requirements. Rotational life specification of 300M cycles minimum ensures equivalent mechanical durability across all substitutes.

Frequently Asked Questions (FAQ)

Q: Can the 63KS100 directly replace the 63KS128 in any application?

A: The 63KS100 is mechanically and electrically compatible with the 63KS128 in terms of mounting, voltage supply, and physical interface. However, the 400 PPR output of the 63KS100 differs from the 512 PPR of the 63KS128. Substitution is valid only when the application's firmware, control algorithm, or mechanical design does not require the higher resolution of 512 PPR. Direct replacement without firmware adjustment may result in reduced position accuracy or measurement resolution.

Q: What is the difference between 63KS128 and 63K128?

A: The 63KS128 and 63K128 are functionally identical. Both are Grayhill 63K series optical encoders with 512 pulses per revolution, 5V supply, vertical panel mount orientation, and PC pin termination. No electrical, mechanical, or environmental differences exist between these part numbers. Selection is based on inventory availability and procurement lead times.

Q: Are all three parts suitable for panel mount applications?

A: Yes. The 63KS128, 63K128, and 63KS100 all feature panel mount configuration with vertical orientation and 1/4" diameter flatted end actuators. All three parts are designed for identical mounting interfaces and mechanical installation procedures.

Q: Do these encoders require special storage or handling?

A: No. All three parts carry Moisture Sensitivity Level (MSL) rating of 1, indicating unlimited shelf life. No special moisture-controlled storage, baking procedures, or time-limited handling requirements apply to these components.

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

A: All three parts—63KS128, 63K128, and 63KS100—specify a minimum rotational life of 300 million cycles. This specification applies to the optical encoder mechanism and represents the expected operational durability under normal use conditions.

Q: Are these parts RoHS compliant?

A: Yes. All three parts carry ROHS3 compliance certification and REACH Unaffected status, confirming compliance with current environmental and hazardous substance regulations applicable to electronic components.