YH02A IP55 Electromagnetic Push Button Safety Switch – KLD28A KJD17A
YH02A IP55 Electromagnetic Push Button Safety Switch – KLD28A KJD17A
YH02A Electromagnetic Push Button Safety Switch – IP55 Waterproof | Replaces KLD28A & KJD17A
The YH02A Electromagnetic Push Button Switch is a CE-certified, IP55-rated safety switch engineered for machine tools, large power tools, and garden machinery. Featuring copper contacts and a robust electromagnetic design, this switch provides dependable under-voltage and power-off protection — automatically preventing the machine from restarting after an unexpected power loss. Simply press the green start button to resume operation, keeping operators safe at all times.
It is a direct replacement for KLD28A and KJD17A models, making upgrades and maintenance fast and straightforward.
Key Features
- IP55 Waterproof Protection — Dust and water-resistant housing for demanding workshop and outdoor environments
- Under-Voltage & Power-Off Protection — Machine will NOT restart automatically after power is cut; requires a deliberate press of the green start button
- Double Pole Cut-Off — Full disconnection of the circuit for maximum safety
- Brake Function — Single-pole cut-off brake option available
- Overload Protection Compatible — Can be combined with an overload protection switch for complete under-voltage and overload safeguarding
- Copper Contacts — Durable, corrosion-resistant conductivity for long service life
- 4-Pin or 5-Pin Configuration — Flexible wiring to suit a variety of machine tool setups
- CE Certified — Meets international safety standards
Specifications
| Model | YH02-A (Replaces KLD28A, KJD17A) |
| Rated Voltage | AC 250V / AC 110V |
| Rated Current | 8A @ AC 250V | 16A @ AC 110V |
| Coil Voltage | 220–240V |
| Rated Frequency | 50/60 Hz |
| Pin Number | 4-Pin / 5-Pin |
| Protection Rating | IP55 |
| Operating Cycles | 5 × 10⁴ |
| Ambient Temperature | T85/55 |
| Material | Copper (contacts) |
| Certification | CE |
| Country of Origin | Made in China |
Typical Applications
- Lathes, milling machines, and workshop machine tools
- Table saws, bench grinders, and large power tools
- Garden machinery (wood chippers, lawn tractors, etc.)
- Industrial equipment requiring restart-prevention safety switches
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Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What machines is the YH02A electromagnetic push button switch compatible with?
A: The YH02A is widely used with machine tools (lathes, mills, grinders), large bench power tools, and garden machinery. It is a direct drop-in replacement for KLD28A and KJD17A switches, so any machine originally fitted with those models will accept the YH02A without modification.
Q: Does the YH02A switch restart automatically after a power outage?
A: No — this is one of its most important safety features. After an unexpected power loss, the electromagnetic mechanism keeps the switch in the OFF position. An operator must deliberately press the green start button to restart the machine, preventing accidental or uncontrolled startups.
Q: What does the IP55 rating mean for this switch?
A: IP55 means the switch is protected against dust ingress and low-pressure water jets from any direction. This makes it suitable for dusty workshops, outdoor power equipment, and garden machinery where moisture and debris are common concerns.
Q: Can the YH02A be used with an overload protection switch?
A: Yes. Both the double-pole cut-off version and the single-pole brake version can be combined with a separate overload protection switch to achieve comprehensive under-voltage and overload protection for your equipment.