Grayhill 61R50 Rotary Encoder Optical 50PPR - Equivalent & Substitute Parts

Part Overview

The Grayhill 61R50 is an optical rotary encoder with 50 pulses per revolution (PPR), providing quadrature incremental output. This encoder features a 1/4" diameter flatted end actuator, vertical orientation, and panel/PCB through-hole mounting. The device operates at 5V supply voltage and is designed for applications requiring precise rotational position feedback with no detent mechanism or built-in switch functionality.

The 61R50 maintains Active product status with 796 units in current inventory. Substitute parts are identified based on matching core electrical and mechanical parameters that permit direct functional replacement within specified application constraints.

Substiute Parts

61R50

Grayhill Inc.In Stock: 82061R50 Datasheet

Current PartRFQ

EM14A0D-C24-L032N

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Grayhill 61R50 are identified based on matching the following critical parameters:

Mandatory Matching Parameters:

• Encoder Type: Optical
• Output Type: Quadrature (Incremental)
• Voltage - Supply: 5V
• Actuator Type: 1/4" Dia Flatted End
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin
• Detent: No
• Built-in Switch: No

Variable Parameters (Application-Dependent):

• Pulses per Revolution (PPR): The 61R50 specifies 50 PPR. Substitute parts with different PPR values may be considered only when application resolution requirements permit lower resolution operation.

The Bourns EM14A0D-C24-L032N is listed as a substitute part. This encoder matches all mandatory parameters but operates at 32 PPR instead of 50 PPR. This substitution is valid only for applications where 32 PPR resolution meets functional requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: Grayhill 61R50

The Grayhill 61R50 is the specified component with Active product status and ROHS3 compliance. Current inventory of 796 units supports immediate procurement. This encoder provides 50 PPR resolution with 10 million cycle rotational life rating.

Substitute Part: Bourns EM14A0D-C24-L032N

The Bourns EM14A0D-C24-L032N is a valid substitute when application requirements permit operation at 32 PPR resolution. This part maintains all mandatory mechanical and electrical interface parameters. Both parts are ROHS3 compliant and operate at 5V supply voltage.

Key Difference - Rotational Life:

The Grayhill 61R50 specifies 10 million cycle minimum rotational life, while the Bourns EM14A0D-C24-L032N specifies 1 million cycle minimum. Applications requiring extended operational life should prioritize the Grayhill 61R50.

Key Difference - Resolution:

The Grayhill 61R50 provides 50 PPR, while the Bourns EM14A0D-C24-L032N provides 32 PPR. Applications requiring 50 PPR resolution must use the Grayhill 61R50. Applications with lower resolution requirements may use the Bourns substitute.

Regulatory Compliance:

Both parts are ROHS3 compliant. The Grayhill 61R50 is REACH Unaffected. The Bourns EM14A0D-C24-L032N is REACH Affected. Applications subject to REACH regulations should confirm compatibility with the Bourns part status.

Frequently Asked Questions (FAQ)

Q: Can the Bourns EM14A0D-C24-L032N directly replace the Grayhill 61R50 in all applications?

A: No. The Bourns part operates at 32 PPR while the Grayhill operates at 50 PPR. Direct replacement is valid only for applications where 32 PPR resolution meets functional requirements. Applications requiring 50 PPR resolution cannot use the Bourns substitute.

Q: What are the mechanical interface requirements for substitution?

A: Both parts feature identical mechanical interfaces: 1/4" diameter flatted end actuator, vertical orientation, panel/PCB through-hole mounting, and PC pin termination. These parameters are matched between the primary and substitute parts.

Q: Are there electrical compatibility concerns between these parts?

A: Both parts operate at 5V supply voltage and provide quadrature incremental output. Electrical interface compatibility is confirmed. No signal format conversion is required.

Q: What is the significance of the rotational life difference?

A: The Grayhill 61R50 specifies 10 million cycle minimum life, while the Bourns EM14A0D-C24-L032N specifies 1 million cycle minimum. Applications with continuous or high-cycle operation should use the Grayhill part to ensure adequate component life.

Q: Are both parts RoHS compliant?

A: Yes. Both the Grayhill 61R50 and Bourns EM14A0D-C24-L032N are ROHS3 compliant. However, the Grayhill part is REACH Unaffected while the Bourns part is REACH Affected. Confirm REACH compliance requirements for your application.

Q: What packaging is available for these parts?

A: Both parts are supplied in Bulk packaging. The Grayhill 61R50 has 796 units in current inventory. The Bourns EM14A0D-C24-L032N has 1081 units in current inventory.

Q: Can these encoders be used interchangeably in PCB designs?

A: Yes, from a physical mounting perspective. Both parts use identical panel/PCB through-hole mounting and PC pin termination. However, firmware or software must accommodate the PPR difference if resolution-dependent calculations are performed.