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Bourns PEC12-4120F-S0024 Rotary Encoder Mechanical 24PPR Equivalent & Substitute Parts
Part Overview
The Bourns PEC12-4120F-S0024 is a mechanical rotary encoder with 24 pulses per revolution (PPR), quadrature output, and integrated switch functionality. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The encoder features a 6mm diameter flatted end actuator, vertical PCB through-hole mounting, and 30,000 cycle minimum rotational life. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Encoder Type | Mechanical |
| Output Type | Quadrature (Incremental) |
| Pulses per Revolution (PPR) | 24 |
| Actuator Type | 6mm Dia Flatted End |
| Detent | Yes |
| Built-in Switch | Yes |
| Mounting Type | PCB, Through Hole |
| Orientation | Vertical |
| Termination Style | PC Pin |
| Rotational Life (Cycles Min) | 30K |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the PEC12-4120F-S0024 is determined by strict equivalence across the following critical parameters:
- Encoder Type: Mechanical
- Output Type: Quadrature (Incremental)
- Pulses per Revolution: 24
- Actuator Type: 6mm Dia Flatted End
- Detent: Yes
- Built-in Switch: Yes
- Mounting Type: PCB, Through Hole
- Orientation: Vertical
- Termination Style: PC Pin
- Rotational Life: 30K cycles minimum
- RoHS Compliance: ROHS3 Compliant
Direct substitutes maintain all parameters identically. Similar parts are grouped by PPR variation (12PPR vs 24PPR) and are suitable only when application requirements permit pulse resolution changes.
Parameter Comparison
| Part Number | Manufacturer | Series | PPR | Product Status | Packaging | Inventory (Pcs) | RoHS Status | MSL |
|---|---|---|---|---|---|---|---|---|
| PEC12-4120F-S0024 | Bourns Inc. | PEC12 | 24 | Obsolete | - | 949 | ROHS3 Compliant | Not Applicable |
| PEC12R-4120F-S0024 | Bourns Inc. | PEC12R | 24 | Active | Tray | 780 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-3222F-S0024 | Bourns Inc. | PEC12R | 24 | Active | Tray | 2793 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4217F-S0024 | Bourns Inc. | PEC12R | 24 | Active | Tray | 2454 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4220F-S0024 | Bourns Inc. | PEC12R | 24 | Active | Tray | 3294 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4117F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 1938 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4120F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 2439 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4125F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 1297 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4130F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 2835 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4217F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 1889 | ROHS3 Compliant | 1 (Unlimited) |
| PEC12R-4220F-S0012 | Bourns Inc. | PEC12R | 12 | Active | Tray | 1798 | ROHS3 Compliant | 1 (Unlimited) |
Engineering Selection Recommendations
For direct replacement of the obsolete PEC12-4120F-S0024, select from the active PEC12R series parts with 24PPR specification: PEC12R-4120F-S0024, PEC12R-3222F-S0024, PEC12R-4217F-S0024, or PEC12R-4220F-S0024. All maintain identical electrical and mechanical parameters with ROHS3 compliance and improved moisture sensitivity level (MSL 1, Unlimited). The PEC12R-4220F-S0024 offers the highest inventory availability at 3,294 pieces.
For applications where pulse resolution can be reduced, 12PPR variants (PEC12R-4117F-S0012, PEC12R-4120F-S0012, PEC12R-4125F-S0012, PEC12R-4130F-S0012, PEC12R-4217F-S0012, PEC12R-4220F-S0012) are functionally compatible across all other parameters. These parts are suitable only when the application firmware or mechanical design accommodates half the pulse resolution.
Frequently Asked Questions (FAQ)
Q: Can I use a 12PPR encoder as a direct replacement for the 24PPR PEC12-4120F-S0024?
A: No, not without application modification. The 12PPR variants output half the pulses per revolution. Direct substitution requires identical PPR specification. Use 12PPR parts only if your application firmware and mechanical design support reduced pulse resolution.
Q: What is the difference between PEC12 and PEC12R series?
A: The PEC12-4120F-S0024 (PEC12 series) is obsolete. The PEC12R series represents the active product line with improved moisture sensitivity level (MSL 1, Unlimited vs Not Applicable) and tray packaging. All electrical and mechanical specifications remain identical.
Q: Are all PEC12R 24PPR variants electrically interchangeable?
A: Yes. PEC12R-4120F-S0024, PEC12R-3222F-S0024, PEC12R-4217F-S0024, and PEC12R-4220F-S0024 are electrically and mechanically identical. Differences in part numbering reflect internal design variations that do not affect functional performance or PCB compatibility.
Q: What packaging format should I specify for procurement?
A: All active substitute parts are supplied in tray packaging. The original PEC12-4120F-S0024 packaging format is not specified in available data.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. The original PEC12-4120F-S0024 and all listed substitute parts maintain ROHS3 compliance.
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