Grayhill Inc. 513375-9 Rotary Encoder Mechanical 9PPR Equivalent & Substitute Parts

Part Overview

The Grayhill Inc. 513375-9 is an active mechanical rotary encoder with 9 pulses per revolution (PPR) in BCD absolute output format. This vertical-orientation encoder features a 1/8" diameter flatted end actuator and is designed for panel and PCB through-hole mounting applications. The part is RoHS Compliant and REACH Unaffected, with unlimited moisture sensitivity rating (MSL 1). With 930 pieces in current stock and a rotational life rating of 25,000 cycles minimum, this encoder serves applications requiring precise mechanical position encoding. Alternative models within the Grayhill 51 series may be necessary when application requirements specify different pulse-per-revolution counts or when inventory constraints necessitate substitution.

Substiute Parts

513375-9

Grayhill Inc.In Stock: 1026513375-9 Datasheet

Current PartRFQ

513374-8

Grayhill Inc.In Stock: 944513374-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Grayhill 513375-9 is determined by strict parameter matching within the Grayhill 51 series mechanical rotary encoder family. The critical parameters that define substitution compatibility are:

Fixed Parameters (Must Match):

• Encoder Type: Mechanical
• Output Type: BCD (Absolute)
• Actuator Type: 1/8" Dia Flatted End
• Detent: Yes
• Built-in Switch: No
• Mounting Type: Panel, PCB Through Hole
• Orientation: Vertical
• Termination Style: PC Pin
• Rotational Life (Cycles Min): 25K
• Series: 51

Variable Parameter (Allows Substitution):

• Pulses per Revolution: The 513375-9 specifies 9 PPR. Substitute parts within this family may differ in PPR count while maintaining all other mechanical and electrical characteristics.

The Grayhill 513374-8 qualifies as a substitute based on matching all fixed parameters while differing only in the pulses-per-revolution specification (8 PPR versus 9 PPR). Both parts maintain identical mechanical form factors, mounting configurations, and operational characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The Grayhill 513375-9 is the specified component for applications requiring 9 pulses per revolution in BCD absolute output format. This part maintains active product status with full RoHS Compliance and REACH Unaffected certification, ensuring regulatory compliance across global markets. Current inventory of 930 pieces supports immediate procurement without lead-time constraints.

Substitute Part Selection: The Grayhill 513374-8 serves as a direct mechanical and electrical substitute when application requirements permit operation with 8 pulses per revolution instead of 9 PPR. This substitute maintains identical mechanical mounting, actuator geometry, detent operation, and rotational life specifications. The 513374-8 carries ROHS3 Compliant status, which exceeds the RoHS Compliance requirement of the primary part. Both parts share identical REACH Unaffected and EAR99 export classification status. Inventory availability of 904 pieces for the 513374-8 provides alternative sourcing when primary part allocation is constrained.

Compliance Considerations: Both parts satisfy RoHS and REACH regulatory requirements. The substitution decision should be based solely on whether the application circuit design accommodates the 8 PPR output specification of the 513374-8 in place of the 9 PPR specification of the 513375-9.

Frequently Asked Questions (FAQ)

Q: Can the 513374-8 be used as a direct replacement for the 513375-9 in existing designs?

A: The 513374-8 is mechanically and electrically compatible with the 513375-9 in all aspects except pulses per revolution. The 513374-8 outputs 8 PPR while the 513375-9 outputs 9 PPR. Direct substitution is possible only if the receiving circuit or application firmware can accommodate the 8 PPR output specification. Physical mounting, actuator interface, and electrical termination are identical between both parts.

Q: What are the key parameters that must match for substitution within the Grayhill 51 series?

A: Substitution within the Grayhill 51 series requires matching of encoder type (mechanical), output type (BCD absolute), actuator type (1/8" dia flatted end), detent operation (yes), mounting configuration (panel and PCB through-hole), orientation (vertical), termination style (PC pin), and rotational life rating (25K cycles minimum). The pulses-per-revolution specification is the primary variable parameter that distinguishes individual part numbers within this compatible family.

Q: Are there packaging differences between the 513375-9 and 513374-8?

A: The 513375-9 is supplied in standard packaging, while the 513374-8 is supplied in bulk packaging. Both packaging formats contain identical mechanical rotary encoder components with no functional differences. Packaging selection should be based on procurement quantity requirements and inventory management practices.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. The 513375-9 carries RoHS Compliant certification, and the 513374-8 carries ROHS3 Compliant certification. Both parts are REACH Unaffected and classified as EAR99 for export purposes. Both parts maintain active product status with Grayhill Inc.

Q: What is the minimum rotational life specification for both encoders?

A: Both the 513375-9 and 513374-8 specify a minimum rotational life of 25,000 cycles. This specification applies to mechanical detent operation and electrical contact reliability under normal operating conditions.

Q: How does the BCD absolute output differ from other encoder output types?

A: BCD (Binary Coded Decimal) absolute output provides a unique digital code for each mechanical position of the encoder shaft. The absolute output format means the encoder reports its current position directly without requiring a reference point or initialization sequence. The 9 PPR specification of the 513375-9 indicates 9 distinct mechanical positions per complete revolution, each with a unique BCD code output.