Grayhill 61KS64 Rotary Encoder Optical 64PPR Equivalent & Substitute Parts

Part Overview

The Grayhill 61KS64 is an optical rotary encoder with 64 pulses per revolution (PPR), delivering quadrature incremental output at 5V supply voltage. This component is designed for panel and PCB through-hole mounting in vertical orientation with a 1/4" diameter flatted end actuator. The part maintains Active product status with 1002 units in current inventory stock.

Equivalent and substitute parts are identified when design requirements permit component interchange based on matching electrical specifications, mechanical form factors, and output characteristics. Alternative models from Grayhill and Bourns manufacturers are available to support supply chain flexibility and application requirements.

Substiute Parts

61KS64

Grayhill Inc.In Stock: 103561KS64 Datasheet

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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 61KS64 are classified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• 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

Grouping Logic:

Group 1 - Direct Equivalents (64 PPR, Grayhill Series): Parts 61K64 and 61R64 share identical electrical and mechanical specifications with the 61KS64, including 64 PPR resolution, 5V operation, and vertical panel/PCB mounting. These represent alternative part numbers within the Grayhill product line.

Group 2 - Cross-Manufacturer Equivalent (64 PPR, Bourns): Part EM14A0D-C24-L064N from Bourns Inc. matches the 61KS64 across all critical parameters: 64 PPR, 5V supply, quadrature output, 1/4" flatted actuator, vertical orientation, and PC pin termination. This part enables substitution across manufacturers while maintaining functional compatibility.

Group 3 - Resolution Variant (32 PPR, Bourns): Part EM14A0D-C24-L032N differs in pulses per revolution (32 PPR versus 64 PPR). This part is listed as a substitute option only when application requirements permit reduced encoder resolution.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Identical Specifications):

Parts 61K64 and 61R64 from Grayhill provide direct substitution for the 61KS64 with no functional or mechanical differences. Both maintain ROHS3 compliance, 10M rotational life cycles, and identical electrical characteristics. Selection between these Grayhill variants depends on availability and supply chain requirements.

For Cross-Manufacturer Substitution (64 PPR):

The Bourns EM14A0D-C24-L064N provides equivalent functionality across all critical parameters: 64 PPR resolution, 5V supply, quadrature output, and identical mechanical form factor. This part is ROHS3 compliant and suitable for direct replacement. Note that rotational life specification differs (1M cycles versus 10M cycles for Grayhill parts); application duty cycle requirements determine acceptability.

For Resolution-Reduced Applications (32 PPR):

The Bourns EM14A0D-C24-L032N is substitutable only when application design permits 32 PPR operation instead of 64 PPR. This part maintains all other mechanical and electrical compatibility parameters. Rotational life specification is 1M cycles. This option is applicable only to systems where reduced encoder resolution does not compromise performance requirements.

Compliance Considerations:

All listed substitute parts maintain ROHS3 compliance. The Bourns EM14 series parts carry REACH Affected status, while Grayhill 61K and 61R series parts are REACH Unaffected. Applications subject to REACH regulatory requirements must account for this distinction.

Frequently Asked Questions (FAQ)

Q: Can the 61K64 directly replace the 61KS64?

A: Yes. The 61K64 shares identical electrical specifications (64 PPR, 5V, quadrature output), mechanical form factor (1/4" flatted actuator, vertical orientation), mounting type (panel and PCB through-hole), and termination style (PC pin). Both are Grayhill products with ROHS3 compliance and 10M rotational life cycles.

Q: What is the difference between the 61KS64 and 61R64?

A: The primary difference is the product series designation (61K versus 61R). Both parts are Grayhill optical encoders with identical 64 PPR resolution, 5V supply voltage, quadrature output, mechanical specifications, and rotational life (10M cycles). Series designation reflects internal Grayhill product line organization but does not affect functional compatibility.

Q: Can the Bourns EM14A0D-C24-L064N replace the 61KS64?

A: Yes, for applications where rotational life specification of 1M cycles is acceptable. The Bourns part matches all critical parameters: 64 PPR, 5V supply, quadrature output, 1/4" flatted actuator, vertical orientation, panel/PCB through-hole mounting, and PC pin termination. Both are ROHS3 compliant. The Bourns part carries REACH Affected status versus Grayhill's REACH Unaffected status.

Q: When can the EM14A0D-C24-L032N be used as a substitute?

A: The 32 PPR Bourns encoder is substitutable only when application requirements permit reduced encoder resolution. All other mechanical and electrical parameters match the 61KS64. Applications requiring 64 PPR resolution cannot use this part.

Q: What are the key parameters that determine substitutability?

A: Substitution compatibility is determined by: encoder type (optical), output type (quadrature incremental), pulses per revolution, supply voltage (5V), actuator type (1/4" flatted end), mounting type (panel/PCB through-hole), orientation (vertical), and termination style (PC pin). Deviations in any of these parameters indicate incompatibility for direct substitution.

Q: Are there packaging differences between these substitute parts?

A: All listed parts are supplied in Bulk packaging. No packaging format differences exist among the substitute options.

Q: How do rotational life specifications affect part selection?

A: Grayhill 61KS64, 61K64, and 61R64 specify 10M rotational life cycles. Bourns EM14 series parts specify 1M rotational life cycles. Applications with high-duty-cycle requirements or extended operational life should prioritize Grayhill parts. Applications with moderate duty cycles may accept Bourns parts with lower rotational life ratings.