Skip to main content

Fixed Status Current Switches
NSA-FIXED

Part Numbers

NSA-A/CS2
NSA-A/SCS2
NSA-A/SCS2-L

The Carrier Fixed “Status” Current switches are designed for use in any AC current monitoring application in which you are looking for a “Go/No Go” or On/Off status for a particular piece of equipment. The current switches should be installed on the line side of the power to the motor, pump, compressor or other equipment. The current switches are available in both solid and split-core versions which also includes a Patented 35 mm Din Rail mounting foot for easy installation in panel mount applications. The solid-core versions are a great choice for new installations or OEM applications in which cost sensitivity, lower trip points and environmental issues may be of concern.

Note: The Fixed Current Switches are not intended to be used in Life / Safety applications or in Hazardous / Classified locations.

Applications

Pump Status, Fan Status, Compressors, Motor Status, Ovens, Industrial Equipment, Lighting Status and Usage, Electrical Load Status, Local Alarms (Strobes and Audible Alarms)

Monitored Current Type: AC Current
Maximum Working Voltage: 600 VAC
Core Style: NSA-A/CS2: Solid | NSA-A/SCS2: Solid | NSA-A/SCS2-L: Split
Operating Frequency Range: 40 to 1 kHz
Sensor Power: Induced from the Monitored Conductor
Amperage Range: NSA-A/CS2: 0-250A | NSA-A/SCS2: 0-200A | NSA-A/SCS2-L: 0-200A
Isolation Voltage: 2200 VAC
Trip Point Style | Trip Point: Fixed
NSA-A/CS2: 0.25A or less | NSA-A/SCS2: 1.5A or less
NSA-A/SCS2-L: 1.5A or less
Contact Type: Normally Open (N/O)
“Status” Contact Rating: 0.2A @ 200 VAC/VDC
“Status” Contact “On” Resistance | “O” Resistance: < 10 Ohms (tripped) | > 1 Meg Ohms (Open)
Response Time: See Response Time Table
Status LED Indication1: Red LED (Monitored current is above Trip Point)
Aperture Size: 0.75” (19.05 mm)
Din Rail Size: 35 mm (U.S. Patent No. 7,416,421)
Operating Temperature Range: 5 to 104ºF (-15 to 40ºC)
Operating Humidity Range: 0 to 95%, non-condensing
Recommended Storage Temperature | RH Range: 41 to 95°F (5 to 35°C) | 40% to 85% RH, non-condensing
Enclosure Material | Flammability Rating: PC/ABS (Polycarbonate/ABS Blend) | UL94-V0
Wiring Connections: 2 Position, Screw Terminal Block (Not Polarity Sensitive)
Wire Size: 16 to 22 AWG (1.31 mm2 to 0.33 mm2) Copper Wires only
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Minimum Mounting Distance: 1” (2.6 cm) between current switch (Relays, Contactors, Transformers)
Agency Approvals: UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723),
CE, RoHS2, WEEE
Product Weight: NSA-A/CS2: 0.216 lbs (0.099kg) | NSA-A/SCS2: 0.270 lbs (0.123 kg)
NSA-A/SCS2-L: 0.280 lbs. (0.127 kg)
Product Dimensions (L x W x H): Solid Core: 2.760” (70.11mm) x 3.343” (84.92mm) x 1.050” (26.67mm)
Split Core: 2.780” (70.51mm) x 3.238” (82.25mm) x 1.120” (28.45mm)

1The LED should not be used to determine if current is present. At low currents the LED may not be visible.

Model # 0.15 Amps 0.20 Amps 0.25 Amps 0.50 Amps 0.75 Amps 1.0 Amps 1.2 Amps 1.5 Amps 10 Amps 20 Amps
NSA-A/CS2 156mS 100mS 84mS - - 32mS - - 26mS 24mS
NSA-A/SCS2 - - - 484mS - 72mS - 45mS 26mS 20mS
NSA-A/SCS2-L - 224mS 144mS 65mS 47mS 39mS - - 25mS 22mS

-: Unit was not tested (below minimum trip point or for that range)unit was not tested (below minimum trip point or for that range).

Monitored Current Type: AC Current
Maximum Working Voltage: 600 VAC
Core Style: NSA-A/CS2: Solid | NSA-A/SCS2: Solid | NSA-A/SCS2-L: Split
Operating Frequency Range: 40 to 1 kHz
Sensor Power: Induced from the Monitored Conductor
Amperage Range: NSA-A/CS2: 0-250A | NSA-A/SCS2: 0-200A | NSA-A/SCS2-L: 0-200A
Isolation Voltage: 2200 VAC
Trip Point Style | Trip Point: Fixed
NSA-A/CS2: 0.25A or less | NSA-A/SCS2: 1.5A or less
NSA-A/SCS2-L: 1.5A or less
Contact Type: Normally Open (N/O)
“Status” Contact Rating: 0.2A @ 200 VAC/VDC
“Status” Contact “On” Resistance | “O” Resistance: < 10 Ohms (tripped) | > 1 Meg Ohms (Open)
Response Time: See Response Time Table
Status LED Indication1: Red LED (Monitored current is above Trip Point)
Aperture Size: 0.75” (19.05 mm)
Din Rail Size: 35 mm (U.S. Patent No. 7,416,421)
Operating Temperature Range: 5 to 104ºF (-15 to 40ºC)
Operating Humidity Range: 0 to 95%, non-condensing
Recommended Storage Temperature | RH Range: 41 to 95°F (5 to 35°C) | 40% to 85% RH, non-condensing
Enclosure Material | Flammability Rating: PC/ABS (Polycarbonate/ABS Blend) | UL94-V0
Wiring Connections: 2 Position, Screw Terminal Block (Not Polarity Sensitive)
Wire Size: 16 to 22 AWG (1.31 mm2 to 0.33 mm2) Copper Wires only
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Minimum Mounting Distance: 1” (2.6 cm) between current switch (Relays, Contactors, Transformers)
Agency Approvals: UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723),
CE, RoHS2, WEEE
Product Weight: NSA-A/CS2: 0.216 lbs (0.099kg) | NSA-A/SCS2: 0.270 lbs (0.123 kg)
NSA-A/SCS2-L: 0.280 lbs. (0.127 kg)
Product Dimensions (L x W x H): Solid Core: 2.760” (70.11mm) x 3.343” (84.92mm) x 1.050” (26.67mm)
Split Core: 2.780” (70.51mm) x 3.238” (82.25mm) x 1.120” (28.45mm)

1The LED should not be used to determine if current is present. At low currents the LED may not be visible.

Model # 0.15 Amps 0.20 Amps 0.25 Amps 0.50 Amps 0.75 Amps 1.0 Amps 1.2 Amps 1.5 Amps 10 Amps 20 Amps
NSA-A/CS2 156mS 100mS 84mS - - 32mS - - 26mS 24mS
NSA-A/SCS2 - - - 484mS - 72mS - 45mS 26mS 20mS
NSA-A/SCS2-L - 224mS 144mS 65mS 47mS 39mS - - 25mS 22mS

-: Unit was not tested (below minimum trip point or for that range)unit was not tested (below minimum trip point or for that range).

California residents please see Proposition 65