EB2 Keyed Rotary Knob Switch 2/3 Position Self-Locking 5A CE
EB2 Keyed Rotary Knob Switch 2/3 Position Self-Locking 5A CE
EB2 Keyed Rotary Knob Switch – 2 & 3 Position, Self-Locking, 5A
The EB2-11Y2 / EB2-20Y3 Rotary Knob Switch is a reliable, CE-certified key-operated selector switch designed for panel mounting in control boxes, machinery, and DIY electrical projects. Available in both 2-position (EB2-11Y2, 1NO/1NC) and 3-position (EB2-20Y3, 2NO DPST) configurations, it features a self-locking mechanism that keeps your selection firmly in place once turned.
Key Features
- 2 & 3 Position Options: Choose the EB2-11Y2 for a 2-position (1NO/1NC) setup or the EB2-20Y3 for a 3-position (2NO/DPST) configuration.
- Self-Locking (Latching) Operation: The rotary mechanism stays locked in the selected position — no need to hold the switch in place.
- Silver Contacts: High-conductivity silver contact material ensures consistent electrical performance and long service life.
- 5A Rated Current: Handles up to 5 amps, suitable for a wide range of control circuit applications.
- 22mm Panel Cutout: Standard 22mm mounting hole fits most industrial and commercial control panels.
- Four-Pin Column Design: Four-foot pin column makes wiring straightforward and secure.
- CE Certified: Meets European conformity standards for safety and electromagnetic compatibility.
- Durable Plastic Housing: Tough, impact-resistant plastic body built for lasting use in demanding environments.
Specifications
| Model | EB2-11Y2 / EB2-20Y3 |
| Positions | 2 Position (EB2-11Y2) / 3 Position (EB2-20Y3) |
| Contact Form | 1NO/1NC (EB2-11Y2) | 2NO / DPST (EB2-20Y3) |
| Rated Current | 5A |
| Contact Material | Silver |
| Panel Cutout | 22mm |
| Pin Configuration | Four-foot column |
| Operation | Self-locking (latching) rotary |
| Housing Material | Plastic |
| Certification | CE |
| Country of Origin | Made in Mainland China |
Common Applications
- Machine tool control panels
- Industrial automation and electrical enclosures
- Power on/off selector circuits
- DIY electronics and maker projects
- HVAC and lighting control systems
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Frequently Asked Questions
Q: What is the difference between the EB2-11Y2 and the EB2-20Y3 rotary knob switch?
A: The EB2-11Y2 is a 2-position rotary knob switch with a 1NO/1NC contact configuration, making it ideal for simple on/off or selector circuits. The EB2-20Y3 is a 3-position switch with a 2NO (DPST) contact arrangement, allowing for more complex switching — for example, off/forward/reverse or low/off/high control setups.
Q: What panel cutout size is required to install this rotary knob switch?
A: Both the EB2-11Y2 and EB2-20Y3 require a standard 22mm round panel cutout, which is a widely used industrial standard. This makes them compatible with most existing control panel enclosures and mounting hardware.
Q: Is this switch self-locking, and does it need a key to operate?
A: Yes, both models feature a self-locking (latching) rotary mechanism, meaning the switch stays in the selected position once turned and does not spring back. The "key" in the product description refers to the physical knob/key-style actuator used to rotate the switch, not a security key — no separate lock key is required for basic operation.
Q: Is the EB2 knob switch CE certified and suitable for professional installations?
A: Yes, the EB2 series rotary knob switch carries CE certification, confirming it meets European safety and electromagnetic compatibility standards. With a 5A rated current and silver contact material, it is well suited for light industrial, commercial panel, and advanced DIY electrical control applications.