Grayhill 61R100 Rotary Encoder Optical 100PPR Equivalent & Substitute Parts

Part Overview

The Grayhill 61R100 is an optical rotary encoder with 100 pulses per revolution (PPR), providing quadrature incremental output. This encoder is designed for panel and PCB through-hole mounting applications requiring vertical orientation with a 1/4" diameter flatted end actuator. The part is currently active in production with 888 units in stock.

Substitute parts are identified for applications where alternative pulse-per-revolution specifications, manufacturer sourcing, or inventory availability necessitate component replacement while maintaining core functional compatibility within the optical encoder category.

Substiute Parts

61R100

Grayhill Inc.In Stock: 92461R100 Datasheet

Current PartRFQ

61K64

Grayhill Inc.In Stock: 70661K64 Datasheet

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61R64

Grayhill Inc.In Stock: 80061R64 Datasheet

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EM14A0D-C24-L032N

Bourns Inc.In Stock: 1184EM14A0D-C24-L032N Datasheet

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EM14A0D-C24-L064N

Bourns Inc.In Stock: 904EM14A0D-C24-L064N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 61R100 are identified based on strict parameter alignment within the optical encoder category. The primary substitution criteria are:

Core Compatibility Parameters:

• Encoder Type: Optical
• Output Type: Quadrature (Incremental)
• Supply Voltage: 5V
• Actuator Type: 1/4" Dia Flatted End
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin

Variable Parameter:

• Pulses per Revolution (PPR): Substitutes available at 32, 64, and 100 PPR configurations

Substitutes are grouped by PPR specification and manufacturer. The 61R64 and 61K64 (both 64 PPR) represent lower-resolution alternatives within the Grayhill product line. The EM14A0D series (Bourns Inc.) provides equivalent optical encoder functionality at 32 PPR and 64 PPR specifications. All substitute parts maintain identical mechanical mounting, electrical interface voltage, and termination characteristics as the primary 61R100 unit.

Parameter Comparison

Engineering Selection Recommendations

Grayhill 61R100 (Primary Part) The 61R100 is the specified component with 100 PPR resolution, 10M cycle rotational life, and REACH Unaffected status. This part is recommended for applications requiring the highest resolution within the optical encoder category and extended operational life cycles.

Grayhill 61R64 (Same Series Substitute) The 61R64 maintains identical mechanical and electrical characteristics as the 61R100 within the same 61R series, with the exception of 64 PPR resolution. This part is suitable for applications where 64 PPR resolution is acceptable and same-manufacturer sourcing is required. Rotational life specification remains 10M cycles.

Grayhill 61K64 (Alternative Series Substitute) The 61K64 provides 64 PPR resolution with equivalent mechanical mounting and electrical interface specifications. This part represents an alternative within the Grayhill product portfolio and is suitable for applications where 64 PPR resolution meets functional requirements. Rotational life specification remains 10M cycles.

Bourns EM14A0D-C24-L064N (Cross-Manufacturer Substitute) The EM14A0D-C24-L064N is a 64 PPR optical encoder from Bourns Inc. with identical mechanical and electrical interface characteristics. This part is suitable for applications where cross-manufacturer sourcing is acceptable. Rotational life specification is 1M cycles, which is lower than the Grayhill alternatives. REACH Affected status applies to this part.

Bourns EM14A0D-C24-L032N (Lower Resolution Substitute) The EM14A0D-C24-L032N is a 32 PPR optical encoder from Bourns Inc. This part is suitable only for applications where 32 PPR resolution is functionally acceptable. Rotational life specification is 1M cycles. REACH Affected status applies to this part.

Frequently Asked Questions (FAQ)

Q: Can the 61R64 directly replace the 61R100 in my application?

A: The 61R64 is mechanically and electrically compatible with the 61R100, sharing identical mounting type, orientation, actuator type, supply voltage, and termination style. The primary difference is pulses per revolution: 64 PPR versus 100 PPR. Direct replacement is possible only if your application can function with 64 PPR resolution instead of 100 PPR.

Q: What is the difference between the Grayhill 61R64 and 61K64?

A: Both parts are 64 PPR optical encoders with identical mechanical and electrical specifications. The primary difference is the product series designation (61R versus 61K). Both maintain 10M cycle rotational life and are ROHS3 compliant with REACH Unaffected status.

Q: Can I use the Bourns EM14A0D-C24-L064N instead of the Grayhill 61R100?

A: The Bourns EM14A0D-C24-L064N is mechanically and electrically compatible with the 61R100 in terms of mounting, orientation, actuator type, voltage, and termination. However, it provides 64 PPR resolution instead of 100 PPR, and has a lower rotational life specification of 1M cycles versus 10M cycles. Additionally, this part has REACH Affected status, whereas the 61R100 is REACH Unaffected. Substitution is suitable only if these differences are acceptable for your application.

Q: What does PPR (Pulses Per Revolution) mean for encoder selection?

A: Pulses per revolution determines the resolution of the encoder output. A 100 PPR encoder provides 100 discrete position measurements per complete rotation, while a 64 PPR encoder provides 64 measurements per rotation. Higher PPR values provide finer position resolution. Selection depends on the position accuracy required by your application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (61R64, 61K64, EM14A0D-C24-L064N, and EM14A0D-C24-L032N) are ROHS3 compliant. However, the Bourns EM14A0D series parts have REACH Affected status, while the Grayhill parts (61R100, 61R64, 61K64) are REACH Unaffected.

Q: What is the significance of rotational life specifications (10M versus 1M cycles)?

A: Rotational life indicates the minimum number of complete rotations the encoder is rated to perform. The Grayhill parts (61R100, 61R64, 61K64) are rated for 10M cycles, while the Bourns EM14A0D series parts are rated for 1M cycles. For applications requiring extended operational life or high-speed continuous rotation, the Grayhill parts with 10M cycle ratings are more suitable.

Q: Can the 32 PPR EM14A0D-C24-L032N substitute for the 100 PPR 61R100?

A: The EM14A0D-C24-L032N is mechanically and electrically compatible but provides significantly lower resolution at 32 PPR compared to 100 PPR. This part is suitable only for applications where 32 PPR resolution is functionally acceptable. Additionally, it has 1M cycle rotational life versus 10M cycles and REACH Affected status.

Q: What mounting configurations are supported by all substitute parts?

A: All listed parts support Panel and PCB Through Hole mounting types with vertical orientation. All use PC Pin termination style and feature a 1/4" diameter flatted end actuator.