YCD9 Series

YCD9 Series

The YCD9 Series is a line of motor protection switches (thermal-magnetic starters) designed to provide combined motor overload protection, manual starting and stopping, and disconnection in a single compact device. These switches integrate adjustable thermal overload elements with magnetic short-circuit protection and a manual ON/OFF toggle.

The series is suitable for AC motors, feeder circuits, pumps, compressors, fans, and general industrial loads where motor protection and manual control are required. It complies with IEC 60947-4-1 / IEC 60947-1 standards.

Technical Specifications

General Data

Specification Details
Series YCD9
Product Type Motor Protection Switch / Thermal Magnetic Starter
Standards Compliance IEC 60947-4-1, IEC 60947-1
Mounting Panel / Surface

Electrical Ratings

Parameter Specification
Rated Operational Voltage Up to 690 V AC
Rated Frequency 50 / 60 Hz
Rated Insulation Voltage 800 V
Short-Circuit Protection Integrated magnetic trip
Overload Protection Adjustable thermal element
Poles 3P (standard)
Utilization Category AC-3

Adjustable Current Range

Model Variant Current Range (A)
YCD9-9 1.6 – 2.5 A
YCD9-16 2.5 – 4 A
YCD9-25 4 – 6.3 A
YCD9-32 5.5 – 8 A
YCD9-40 7 – 10 A
YCD9-50 9 – 13 A
YCD9-63 12 – 18 A
YCD9-80 17 – 25 A
YCD9-100 25 – 32 A
YCD9-125 32 – 40 A
YCD9-160 40 – 50 A

(Ranges indicative — confirmed per actual CNC catalog.)

Protection & Functions

Function Description
Overload Protection Adjustable thermal trip
Short-Circuit Protection Magnetic instantaneous trip
Manual ON/OFF Toggle or push-button operation
Phase Failure Protection Yes (three-phase models)
Reset Manual after trip
Isolation Yes (ON/OFF disconnects motor)

Mechanical & Environmental

Parameter Specification
Mechanical Life ≥ 10,000 operations
Electrical Life ≥ 6,000 operations
Operating Temperature −5 °C … +40 °C
Protection Degree IP20
Mounting Panel / surface mount
Terminal Type Screw clamp

Typical Applications

  • Three-phase motor starters
  • Pump and compressor protection
  • Industrial machinery control
  • Conveyor motors
  • HVAC motor circuits
  • Pump stations and fans

Ordering Examples

Code Description
YCD9-9 Motor protection switch 1.6–2.5 A
YCD9-16 Motor protection switch 2.5–4 A
YCD9-25 Motor protection switch 4–6.3 A
YCD9-63 Motor protection switch 12–18 A
YCD9-100 Motor protection switch 25–32 A
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