WTH-40/C/R/2P RS485 Series
www.watchfuleyesolutions.com Surge Protective Device for AC Power Supply System

Paperless Datasheet
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In accordance with: IEC 61643-1 - Class II and UL1449 Type 4 Location
Location of use: branch sub-distribution boards
Plug-in module and separate base design enables convenient maintenance.
Network with RS485/Modbus, smart remote monitoring

WTH-40/C/R/2P RS485 Series
Model Uc(AC/DC) Up Ures Ordering code
WTH-40/C/R/2P-150 RS485 150/200V 1.3kV 0.8kV USR120013
WTH-40/C/R/2P-275 RS485 275/350V 1.5kV 1.0kV USR120014
WTH-40/C/R/2P-320 RS485 320/400V 1.7kV 1.1kV USR120015
WTH-40/C/R/2P-385 RS485 385/500V 1.8kV 1.2kV USR120016
WTH-40/C/R/2P-420 RS485 420/600V 1.9kV 1.4kV USR120017
※ Uc: Max. continuous operating voltage ※ Frequency: 50/60Hz (AC Power)
※ Up: Voltage protection level ※ Ures @6kV/3kA: Residual voltage

Technical Data
Requirement Class to IEC61643-1 Class II
IEEE Category Rating B & A
Nominal Discharge Current (In) 20kA
Max. Discharge Current (Imax) 40kA
Pulsed Current (Iimp) N/A
Protection Modes L-PE, N-PE
Protective Element MOV
Follow Current (If) NO
Response Time (tA) <25ns
Leakage Current (at 75%U1mA) <20μA
Thermal Protection YES
Protection Rating (IP Code) IP 20
Short Circuit Current Ratings (SCCR) 20kA rms
Max. Back-up Fuse (if mains >80A) 80A gL (circuit-breaker: <40A)
Surge Life at 3kA (8/20μs) >5000 events
Temperature Range - 40°F to 176°F (-40°C to 80°C)
Relative Humidity 0% to 95% noncondensing
Maximum Operating Altitude 10,000 feet (3000m)
Terminal Cross Section 35mm² (solid) / 25mm² (stranded)
Stripping Length Contacts 0.6inches (15mm)
Terminal Screw Torque Max. 3.5Nm
DIN Rail EN60715 35mm top-hat rail
Dimensions DIN 43880 54mm (3TE)
Housing Material Thermoplastic (UL94 V-0)
Housing Design Modular design
Net Weight Per Unit 0.71Lb (320g)
Package Dimension (W×H×D) 2.1"×3.9"×2.7" (54mm×98mm×69mm)
Smart Remote Monitoring YES
Surge Count 0-999
Network Connection RS485/Modbus
SPD Module Monitoring Built-in Integration

Smart Detector Connection Guide
1. Connect the induction coil of surge counter to the 2-port pluggable terminal block (no direction). Hitch the induction loop to the earthing line.
2. Connect USB line (5VDC) to micro usb port of surge counter, and then LED is on.
Connection Diagram
Fault Indication
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