PEC12-2017F-S0024 Rotary Encoder Mechanical 24PPR Equivalent & Substitute Parts

Part Overview

The PEC12-2017F-S0024 is a mechanical rotary encoder manufactured by Bourns Inc., designed for quadrature (incremental) output applications with 24 pulses per revolution. This component features a 6mm diameter flatted end actuator, built-in switch functionality, and right-angle PCB through-hole mounting with PC pin termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Encoder Type	Mechanical
Output Type	Quadrature (Incremental)
Pulses per Revolution	24
Actuator Type	6mm Dia Flatted End
Detent	No
Built in Switch	Yes
Mounting Type	PCB, Through Hole
Orientation	Right Angle
Termination Style	PC Pin
Rotational Life (Cycles Min)	30K

Substitute Part Grouping Explanation

Substitution eligibility for the PEC12-2017F-S0024 is determined by strict equivalence across the following parameters: encoder type (mechanical), output type (quadrature incremental), pulses per revolution (24), actuator type (6mm diameter flatted end), built-in switch presence, mounting configuration (PCB through-hole right angle), termination style (PC pin), and minimum rotational life (30K cycles).

Parts meeting all these criteria are classified as direct substitutes. The PEC12R-2017F-S0024 represents a direct manufacturer upgrade within the same series. The PEC12R-2020F-S0024 and PEC12R-2025F-S0024 variants maintain identical electrical and mechanical specifications with alternative actuator lengths. The EN12 series components from TT Electronics/BI Technologies provide cross-manufacturer equivalents with identical functional parameters.

The PEC12R-2020F-S0012 is excluded from direct substitution due to 12 pulses per revolution specification, which differs from the required 24 PPR.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	PPR	Actuator Type	Mounting	Rotational Life (Cycles)	RoHS Status	Inventory (Pcs)
PEC12-2017F-S0024	Bourns Inc.	PEC12	Obsolete	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	ROHS3 Compliant	966
PEC12R-2017F-S0024	Bourns Inc.	PEC12R	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	ROHS3 Compliant	965
PEC12R-2020F-S0024	Bourns Inc.	PEC12R	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	ROHS3 Compliant	783
PEC12R-2025F-S0024	Bourns Inc.	PEC12R	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	ROHS3 Compliant	908
EN12-VS20A18	TT Electronics / BI Technologies	EN12	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	RoHS Compliant	1090
EN12-VS20AF18	TT Electronics/BI	EN12	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	RoHS Compliant	1171
EN12-VS20AF20	TT Electronics/BI	EN12	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	RoHS Compliant	812
EN12-VS20AF25	TT Electronics/BI	EN12	Active	24	6mm Dia Flatted End	PCB, Through Hole, Right Angle	30K	RoHS Compliant	711

Engineering Selection Recommendations

For applications currently using the obsolete PEC12-2017F-S0024, the PEC12R-2017F-S0024 provides the direct active equivalent from Bourns Inc., maintaining identical specifications with upgraded product status and improved moisture sensitivity rating (MSL 1 Unlimited). This part represents the primary recommendation for direct replacement.

Alternative Bourns options include PEC12R-2020F-S0024 and PEC12R-2025F-S0024, which maintain full electrical and mechanical compatibility while offering different actuator length configurations. All three PEC12R variants carry ROHS3 compliance and active product status.

Cross-manufacturer substitution is supported by the EN12 series from TT Electronics/BI Technologies. The EN12-VS20AF18, EN12-VS20AF20, and EN12-VS20AF25 variants provide equivalent functionality with RoHS compliance and higher inventory availability. Selection among EN12 variants depends on actuator length requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can PEC12R-2020F-S0012 be used as a substitute for PEC12-2017F-S0024?

A: No. The PEC12R-2020F-S0012 operates at 12 pulses per revolution, while the PEC12-2017F-S0024 requires 24 pulses per revolution. This fundamental difference in resolution makes it incompatible for direct substitution.

Q: What is the difference between PEC12R-2017F-S0024, PEC12R-2020F-S0024, and PEC12R-2025F-S0024?

A: These three parts are electrically and mechanically identical in all functional parameters. The numeric designations (2017, 2020, 2025) indicate different actuator length specifications. Selection depends on the mechanical clearance and mounting requirements of the specific application.

Q: Are EN12 series encoders fully compatible with PEC12-2017F-S0024 applications?

A: Yes. The EN12-VS20A18, EN12-VS20AF18, EN12-VS20AF20, and EN12-VS20AF25 encoders meet all electrical and mechanical specifications of the PEC12-2017F-S0024, including 24 PPR output, quadrature format, 6mm flatted end actuator, right-angle PCB mounting, and 30K cycle rotational life. Actuator length variants must be selected based on application requirements.

Q: What is the difference between ROHS3 and RoHS compliance?

A: Both designations indicate RoHS compliance. ROHS3 represents the third iteration of RoHS certification. All substitute parts listed carry valid RoHS compliance suitable for regulated applications.

Q: Which substitute part has the highest inventory availability?

A: EN12-VS20AF18 maintains the highest inventory at 1171 pieces, followed by EN12-VS20A18 at 1090 pieces. Among Bourns PEC12R variants, PEC12R-2025F-S0024 offers 908 pieces.

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