Grayhill 25BSP30-Q-2-12C Rotary Encoder Mechanical - Equivalent & Substitute Parts

Part Overview

The Grayhill 25BSP30-Q-2-12C 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 delivers 50,000 minimum rotational life cycles and operates without detent or built-in switch functionality. Finding equivalent or substitute parts may be necessary due to inventory constraints, application-specific parameter requirements, or supply chain considerations.

Substiute Parts

25BSP30-Q-2-12C

Grayhill Inc.In Stock: 108125BSP30-Q-2-12C 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-2-12C is determined by the following critical parameters that must remain constant across equivalent parts:

Fixed Parameters (Non-Negotiable for Direct Substitution):

• Manufacturer: Grayhill Inc.
• Series: 25
• Encoder Type: Mechanical
• Output Type: Quadrature (Incremental)
• Actuator Type: 1/4" Dia Flatted End
• Mounting Type: PCB, Through Hole
• Orientation: Right Angle
• Termination Style: PC Pin
• Rotational Life: 50K cycles minimum
• Detent: No
• Built-in Switch: No

Variable Parameters (Allowable Differences):

• Pulses per Revolution (PPR)
• Packaging format
• Inventory availability
• RoHS compliance variant

The substitute part 25BP45-Q-2-08C shares all fixed parameters with the main part but differs in PPR specification (8 PPR versus 12 PPR) and base product number designation (25BP45 versus 25BSP30). This difference in resolution must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Mechanical and Electrical Compatibility):

The 25BP45-Q-2-08C functions as a mechanical and electrical substitute for the 25BSP30-Q-2-12C when application firmware or signal processing can accommodate the reduced resolution of 8 PPR versus 12 PPR. Both parts maintain identical mechanical form factors, mounting interfaces, and electrical output protocols (quadrature incremental). Both parts carry active product status and current compliance certifications (RoHS and REACH).

Compliance and Regulatory Alignment:

Both parts satisfy RoHS compliance requirements. The 25BP45-Q-2-08C carries ROHS3 certification, representing the current regulatory standard. Both parts maintain REACH Unaffected status. MSL rating of 1 (Unlimited) on both parts indicates no moisture sensitivity constraints during storage or handling.

Inventory and Availability:

The main part 25BSP30-Q-2-12C maintains 985 pieces in new original stock. The substitute 25BP45-Q-2-08C maintains 768 pieces in new original stock (bulk packaging). Selection between these parts should account for immediate availability requirements and packaging format preferences.

Frequently Asked Questions (FAQ)

Q: Can the 25BP45-Q-2-08C directly replace the 25BSP30-Q-2-12C in existing designs?

A: Mechanical and electrical compatibility is confirmed. The primary difference is PPR specification: 8 PPR versus 12 PPR. Direct replacement requires that the application firmware or signal processing logic can function with the lower resolution output. Physical mounting, connector interface, and quadrature output protocol remain identical.

Q: What is the significance of the PPR difference between these two parts?

A: PPR (Pulses per Revolution) determines encoder resolution. The 25BSP30-Q-2-12C generates 12 pulses per complete shaft rotation, while the 25BP45-Q-2-08C generates 8 pulses per rotation. Applications requiring fine-resolution position tracking may depend on the higher PPR specification. Applications with coarser resolution requirements can operate with either part.

Q: Are there packaging differences between these substitute parts?

A: The 25BSP30-Q-2-12C is specified with standard packaging. The 25BP45-Q-2-08C is specified with bulk packaging. Packaging format does not affect component functionality or performance characteristics.

Q: Do both parts meet current environmental and regulatory standards?

A: Yes. Both parts carry active product status. The 25BSP30-Q-2-12C is RoHS Compliant. The 25BP45-Q-2-08C is ROHS3 Compliant, representing the current regulatory standard. Both parts maintain REACH Unaffected status. MSL rating of 1 (Unlimited) applies to both parts.

Q: What is the rotational life specification for both parts?

A: Both the 25BSP30-Q-2-12C and 25BP45-Q-2-08C specify a minimum rotational life of 50,000 cycles. This specification is identical across both parts.

Q: Are there any supply chain advantages to selecting one part over the other?

A: The 25BSP30-Q-2-12C maintains higher inventory (985 pieces). The 25BP45-Q-2-08C maintains lower inventory (768 pieces). Selection should account for immediate availability requirements and lead time considerations for your application timeline.