Grayhill 25BSP30-Q-4-12C Rotary Encoder Mechanical - Equivalent & Substitute Parts

Part Overview

The Grayhill 25BSP30-Q-4-12C is an active mechanical rotary encoder with 12 pulses per revolution (PPR) output in quadrature (incremental) format. This right-angle orientation encoder features a 1/4" diameter flatted end actuator and is designed for PCB through-hole mounting with PC pin termination. The component is RoHS compliant and REACH unaffected, with a rotational life rating of 50,000 cycles minimum. Finding equivalent or substitute parts may be necessary due to inventory constraints, lead time requirements, or specific application needs where alternative pulse resolution specifications are acceptable.

Substiute Parts

25BSP30-Q-4-12C

Grayhill Inc.In Stock: 89025BSP30-Q-4-12C Datasheet

Current PartRFQ

25BP45-Q-2-08C

Grayhill Inc.In Stock: 87825BP45-Q-2-08C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25BSP30-Q-4-12C is determined by the following critical parameters that must remain consistent across equivalent parts:

Fixed Substitution Criteria:

• Encoder Type: Mechanical
• Output Type: Quadrature (Incremental)
• Actuator Type: 1/4" Dia Flatted End
• Orientation: Right Angle
• Mounting Type: PCB, Through Hole
• Termination Style: PC Pin
• Rotational Life: 50K cycles minimum
• Detent: No
• Built-in Switch: No

Variable Parameter:

• Pulses per Revolution (PPR): May differ based on application requirements

The substitute part 25BP45-Q-2-08C maintains all fixed criteria while offering an alternative PPR specification of 8 instead of 12. This substitution is valid when the application can accommodate the lower pulse resolution. Both parts share identical mechanical mounting characteristics, electrical output topology, and reliability specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 25BSP30-Q-4-12C and 25BP45-Q-2-08C are active products from Grayhill Inc. within the Series 25 mechanical encoder family. Both parts maintain full RoHS compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The primary distinction between these parts is the pulse resolution: 12 PPR versus 8 PPR. Selection between these encoders depends on whether the application circuit and firmware can operate with the reduced resolution of the 8 PPR variant. Both parts share identical mechanical interfaces, mounting footprints, and electrical output characteristics (quadrature incremental format), ensuring physical and functional compatibility at the PCB level when PPR specification flexibility exists.

The 25BP45-Q-2-08C substitute is suitable for applications where lower angular resolution is acceptable or where the 8 PPR output aligns with system requirements. Current inventory levels show 768 units of the substitute part available, compared to 841 units of the main part.

Frequently Asked Questions (FAQ)

Q: Can the 25BP45-Q-2-08C directly replace the 25BSP30-Q-4-12C in my application?

A: Direct replacement is possible only if your application firmware and signal processing circuits can operate with 8 pulses per revolution instead of 12. The mechanical mounting, electrical output format (quadrature), and physical actuator specifications are identical. If your system requires 12 PPR resolution, substitution is not appropriate.

Q: What is the difference in angular resolution between these two encoders?

A: The 25BSP30-Q-4-12C provides 12 pulses per complete 360-degree rotation, while the 25BP45-Q-2-08C provides 8 pulses per rotation. This results in different angular increments per pulse. Your application must support the lower resolution of the 8 PPR variant for substitution to be valid.

Q: Are the mounting footprints identical between these parts?

A: Yes. Both encoders feature PCB through-hole mounting with PC pin termination, right-angle orientation, and 1/4" diameter flatted end actuators. The physical mounting interface is identical.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS compliant and REACH unaffected. The main part carries RoHS Compliant status while the substitute carries ROHS3 Compliant status. Both meet current regulatory requirements. Both have MSL rating of 1 (Unlimited) and identical rotational life specifications of 50,000 cycles minimum.

Q: What is the packaging difference between these parts?

A: The 25BSP30-Q-4-12C is supplied in standard packaging, while the 25BP45-Q-2-08C is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Can I use the 8 PPR encoder if I only need lower resolution?

A: Yes. If your application requires resolution equal to or lower than 8 PPR, the 25BP45-Q-2-08C substitute is suitable. All other mechanical and electrical specifications remain consistent with the main part.