Model: ST-LS203Nx
P.O. Box 330607
Ft. Worth, TX 76163
Phone: 817.483.8497
Fax: 817.572.2242
20 kA Protection
www.sinetamer.com
Application: The ST-LS203Nx is intended for general load applications to a
maximum of 50 amps.
The ST-LS203Nx blends component-level, thermal disconnectors with a
relatively small size. The product also features suppression status indication
through a normally-on LED.
These features make this device one of the most versatile surge protective
devices on the market with superior performance specs.
ANSI/IEEE C62.41.1 & C62.41.2-2002 environments: Suitable for locations
up to 100 amps. Categories: A & B
IEC Environments: Suitable for use in IEC 61643-11 environments
Circuit Topology: Parallel configured combination Frequency Responsive
Circuitry and Voltage Responsive Circuitry circuit design incorporating
component-level, thermal fusing.
Protection Modes: The ST-LS203Nx contains protection components
covering Line to Line and Line to Ground modes
Input Power: 50-60 Hz (60 Hz nominal) Maximum 50 amps.
Temperature Rating: Up to 65°C
Key Features
Diagnostics: One Green LED Indicates Power/Protection Status, Normally
on. Light off indicates power loss and/or protection component loss.
• “All Mode Protection” Circuitry:
Protection Elements are protecting
L-L and L-G Modes
Enclosure: ABS Plastic, UL94V-0
Circuit Interrupt: Internal component-level, thermal fusing
Warranty: 5 Year Unlimited Free Replacement
• Industry Leading Measured Limiting
Voltage (let-through) Performance
ANSI/IEEE C62.41.1 & C62.41.2 Let-Through Voltage Test
Results (tested w/6” lead length external to the enclosure)
Voltage
Code
Circuit Type
3N2
240 V 3Ø
Delta (NN)
(3 wire +
ground)
3N3
3N4
380V 3Ø
Delta
(3 wire +
ground)
480 V 3Ø
Delta (NN)
(3 wire +
ground)
Peak Surge
Current
20 kA
MCOV
320 V
Test
Mode
Cat A, 30 Ω 100 kHz
Ring Wave
2 kV / 67 A
Cat C, 2 Ω
Combination Wave 6
kV / 3 kA
L-L
L-G
281 V
602 V
1710 V
900 V
20 kA
485 V
485 V
L-L
L-G
281 V
929 V
2550 V
1280 V
20 kA
550 V
L-L
L-G
281 V
978 V
2730 V
1430 V
• Multi-stage Hybrid Frequency
Attenuation Circuitry
• Local Diagnostics
• Independent Verification of
Performance and Safety
• No moving parts or springs - No
mechanical or electro-mechanical
thermal/over-current protection
• Component-Level Thermal Fusing
Let-Through Voltage Test Parameters: Positive Polarity, All voltages are peak (±10%). All tests are static (Scope
Settings: Time Base = 20 microseconds, Sampling Rate = 100 Megasamples/sec. These settings assure Letthrough voltages test results are accurate). All tests performed with 6” lead length (external to the enclosure),
simulating actual installed performance
Because we are constantly seeking to improve our products, specifications are subject to change at any time.
© 2015, Energy Control Systems
4.05"
3.50"
240 volt version
2.13"
3.12"
1.58"
Picture is for box dimensions only
Because we are constantly seeking to improve our products, specifications are subject to change at any time.
© 2015, Energy Control Systems