When you're shopping for a rotary encoder for a machine-safety panel, a CNC pendant, or a DIY control box, the first decision is usually mechanical: do you want a compact through-hole board, a panel-mount module with knobs, or a shaft with a firm detent feel? The four listings here-two of them identical-span that range from a $2.50 single EC11 to a $12.93 two-piece module kit.
Quick Take
- On a tight budget and comfortable with PCB soldering? The EC11 push-switch encoder is the lowest listed price.
- Need two units with a positive 30-step feel? The Alps 2-pack sits in the middle and comes from Japan.
- Want a turnkey module with knobs and panel mounting? The 360-degree module 2-pack costs the most but includes two knobs.
Listed-Price Comparison
| Product | Listed Price | Price Bar | Key Specs |
|---|---|---|---|
| 1 Pc - EC11 360 Degree Rotary Encoder PCB Mount Push Switch D Shaft | USD 2.50 | Through-hole, PC pin, push switch | |
| 1 Pc - EC11 360 Degree Rotary Encoder PCB Mount Push Switch D Shaft | USD 2.50 | Through-hole, PC pin, push switch | |
| 360-Degree Rotary Encoder Module with Knobs - 2PCS for Versatile Applications | USD 12.93 | Panel mount, 2 modules with knobs, 5V | |
| Alps Rotary Encoder Momentary Switch 30 Detents 360 Degrees 2 Pack | USD 6.50 | 30 detents, momentary switch, 2 pack |
Decision Matrix
To help match a listing to a project:
- Through-hole with push switch → EC11. Its PC pin termination and shaft actuator are made for a PCB, and the integrated momentary switch lets you combine rotation and selection.
- Panel mount with knobs → 360-degree module 2-pack. The panel-mounted design and included knobs reduce the need for extra hardware.
- Detented feel with a brand name → Alps 30-detent 2-pack. The 30 detents give a stepped rotation, and the 2-pack covers two control points.
Product Notes
#### 1 Pc - EC11 360 Degree Rotary Encoder PCB Mount Push Switch D Shaft
Two separate listings share this exact title and the same listed price of USD 2.50. Each listing includes one EC11 with a D shaft, through-hole PCB mount, and a push-to-actuate momentary switch. The description lists a 15 mm shaft length, 7 pins, and 20 pulses per revolution, plus a switch contact rating of 5 V at 10 mA. If you're populating a board, this is the lowest-cost way to get a rotary encoder with a built-in switch. The trade-off is that you supply the knob and the PCB; the package includes only the encoder itself.
#### 360-Degree Rotary Encoder Module with Knobs - 2PCS for Versatile Applications
At the highest listed price among the four, this kit gives you two modules with knobs. The description specifies a 5 V working voltage and 20 pulses per revolution. The panel-mount style and included knobs make it the most ready-to-use option in this set if you'd rather avoid soldering a bare shaft encoder onto a board. The main limitation is the cost: the convenience of the knobs and panel mount comes at a premium compared to the other listings, so it's best when you need a faster setup.
#### Alps Rotary Encoder Momentary Switch 30 Detents 360 Degrees 2 Pack
This listing pairs two Alps rotary encoders with a momentary push switch and 30 detents per 360-degree rotation. It splits the difference in list price between the EC11 and the module kit. The vertical orientation and PC board mount make it suitable for PCB installation, and the 30-detent indexing gives a firm, stepped feel as you turn the split shaft. The description notes a 12 mm x 12 mm x 4 mm base and a 7 mm diameter bushing. If you need two identical encoders for a dual-control setup, this pack gives you that in one order. A possible drawback is that the 30-step resolution means each detent is relatively coarse; the split shaft is ready for a knob, so factor that piece into your build.
Final Recommendation
If you're soldering onto a PCB and want the lowest listed price, the two EC11 listings at USD 2.50 each are the way to go. If you want a pair of detented encoders with a momentary switch and a familiar brand, the Alps 2-pack at USD 6.50 balances cost and count. If you prefer a panel-mount module with knobs and don't mind spending the most, the 360-degree module 2-pack at USD 12.93 gets you two ready-to-use units.
