WTH-50/B+C/1P Series
www.watchfuleyesolutions.com Surge Protective Device for AC Power Supply System

Paperless Datasheet
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Description
In accordance with: IEC 61643-1 - Class I+II and UL1449 Type 4 Location
Location of use: main sub-distribution boards, branch sub-distribution boards
One-piece compact design with minimized volume but maximized capability of Class I+II surge protection.

WTH-50/B+C/1P Series
Model Uc(AC/DC) Up Ures Ordering code
WTH-50/B+C/1P-75 75/100V 1.1kV 0.6kV US120221
WTH-50/B+C/1P-115 115/150V 1.3kV 0.7kV US120222
WTH-50/B+C/1P-150 150/200V 1.4kV 0.8kV US120223
WTH-50/B+C/1P-275 275/350V 1.6kV 1.0kV US120224
WTH-50/B+C/1P-320 320/400V 1.8kV 1.1kV US120225
WTH-50/B+C/1P-385 385/500V 1.9kV 1.2kV US120226
WTH-50/B+C/1P-420 420/600V 2.0kV 1.4kV US120227
WTH-50/B+C/1P-550 550/700V 2.5kV 1.8kV US120228
WTH-50/B+C/1P-690 690/800V 2.8kV 2.1kV US120229
※ 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 I+II
IEEE Category Rating C, B & A
Nominal Discharge Current (In) 25kA
Max. Discharge Current (Imax) 50kA
Pulsed Current (Iimp) 5kA
Protection Modes L-PE, N-PE
Protective Element High Energy 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 >100A) 100A gL (circuit-breaker: <50A)
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 20mm
Housing Material Thermoplastic (UL94 V-0)
Housing Design Compact design
Net Weight Per Unit 0.3Lb (136g)
Package Dimension (W×H×D) 0.8"×3.6"×2.7" (20mm×90mm×68.5mm)
Remote Contacts NO
Contact Ratings 125VAC/3A, 250VAC/1.5A
Terminal Cross Section Max. 1.5mm²
Stripping Length Contacts 0.25inches (6-7mm)
Remote Terminal Torque 0.25Nm

Connection Diagram
Dimensions
Fault Indication
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