Grayhill 61RS50 Rotary Encoder Optical 50PPR - Equivalent & Substitute Parts

Part Overview

The Grayhill 61RS50 is an optical rotary encoder with 50 pulses per revolution (PPR), designed for incremental quadrature output applications. This encoder features a 1/4" diameter flatted end actuator, vertical orientation, and panel/PCB through-hole mounting. The 61RS50 is an active product with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of this product category. Alternative models may be necessary due to inventory availability, supply chain considerations, or specific application requirements.

Substiute Parts

61RS50

Grayhill Inc.In Stock: 74061RS50 Datasheet

Current PartRFQ

EM14A0D-C24-L032N

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Grayhill 61RS50 is determined by strict alignment with the following critical parameters:

Mandatory Matching 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

Allowable Variation Parameters:

• Pulses per Revolution (PPR): Substitute parts may differ from 50 PPR if the application tolerates resolution changes
• Rotational Life: Substitute parts with lower cycle ratings (1M vs. 10M) represent a functional trade-off
• RoHS/REACH Compliance: Substitute parts must maintain active product status and current compliance certifications

The Bourns EM14A0D-C24-L032N meets all mandatory matching parameters but operates at 32 PPR instead of 50 PPR. This represents a resolution reduction that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Grayhill 61RS50 Selection Criteria:

• Primary choice for applications requiring 50 PPR resolution
• Specified for systems with 10M cycle minimum rotational life requirements
• RoHS Compliant status with MSL 1 rating supports unlimited moisture exposure environments
• Active product status ensures ongoing availability and supply chain stability

Bourns EM14A0D-C24-L032N Selection Criteria:

• Applicable when 32 PPR resolution meets application tolerance specifications
• Suitable for applications with 1M cycle rotational life requirements
• ROHS3 Compliant status maintains current regulatory compliance
• Active product status with higher inventory availability (1081 Pcs vs. 710 Pcs)
• Bulk packaging option available

Compliance Considerations: Both parts maintain active product status and current RoHS compliance certifications. The Bourns part is REACH Affected, while the Grayhill part is REACH Unaffected. Both are classified under ECCN EAR99 and HTSUS 8543.70.4500.

Frequently Asked Questions (FAQ)

Q: Can the Bourns EM14A0D-C24-L032N directly replace the Grayhill 61RS50?

A: Direct replacement is possible only if the application tolerates a resolution reduction from 50 PPR to 32 PPR. All other electrical and mechanical parameters align. The rotational life specification is also reduced from 10M to 1M cycles.

Q: What is the primary difference between these two encoders?

A: The primary difference is pulses per revolution: the Grayhill 61RS50 provides 50 PPR while the Bourns EM14A0D-C24-L032N provides 32 PPR. This affects the encoder's resolution and the frequency of output pulses per shaft rotation.

Q: Are the mounting and termination specifications identical?

A: Yes. Both encoders feature 1/4" diameter flatted end actuators, vertical orientation, panel/PCB through-hole mounting, and PC pin termination. Physical and electrical interfaces are compatible.

Q: What is the difference in rotational life between these parts?

A: The Grayhill 61RS50 is rated for 10M cycles minimum, while the Bourns EM14A0D-C24-L032N is rated for 1M cycles minimum. Applications requiring extended operational life should specify the Grayhill part.

Q: Do both parts operate at the same supply voltage?

A: Yes. Both encoders require 5V supply voltage and are compatible with standard 5V logic systems.

Q: What packaging options are available?

A: The Grayhill 61RS50 is available in standard packaging. The Bourns EM14A0D-C24-L032N is available in bulk packaging.

Q: Are there RoHS compliance differences?

A: Both parts are RoHS compliant. The Grayhill 61RS50 is RoHS Compliant, and the Bourns EM14A0D-C24-L032N is ROHS3 Compliant. Both meet current regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection depends on resolution requirements. For 50 PPR applications, specify the Grayhill 61RS50. For 32 PPR applications, the Bourns EM14A0D-C24-L032N is suitable. Both are active products with current availability.