What are Current Sense Transformers ?
Current Sense Transformers are devices designed to measure the current flowing through a conductor while providing electrical isolation. They are commonly used in applications like production electronics assembly and maintenance. Important specifications include Current Rating (Amps), which determines the maximum current the transformer can handle; Current Ratio, which affects the output signal relative to the input current; and DC Resistance (DCR), which impacts efficiency and heat generation. Ensuring compatibility with existing designs and validating lifecycle status are crucial for procurement teams.
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| Part & Mfr | Current Rating (Amps) | Current Ratio | DC Resistance (DCR) | ET (Volt | Frequency Range | Height | Inductance | Mounting Type | Ratings | Size | Termination Style | Turns Ratio | Type | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Triad Magnetics
|
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10 A | - | 1.75Ohm Secondary | - | 250kHz Min | 0.210" (5.33mm) | 720 µH | Surface Mount | - | 0.272" L x 0.303" W (6.90mm x 7.70mm) | Gull Wing | 1:60 | Invasive | |
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Pulse Electronics
|
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35 A | - | 0.42mOhm Primary, 1.4Ohm Secondary | - | 50kHz ~ 500kHz | 0.394" (10.00mm) | 5.6 mH | Surface Mount | - | 0.591" L x 0.784" W (15.00mm x 19.91mm) | Gull Wing | 100:1 | Invasive | |
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Triad Magnetics
|
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- | - | 250mOhm Max | - | - | 0.720" (18.29mm) | - | Through Hole | - | 0.875" L x 0.875" W (22.23mm x 22.23mm) | PC Pin | 1:500 | - | |
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Würth Elektronik
|
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40 A | - | 280mOhm | - | 50kHz ~ 500kHz | 0.413" (10.50mm) | 22.4 mH | Surface Mount | - | 0.570" L x 0.795" W (14.48mm x 20.20mm) | Gull Wing | 1:200 | Invasive | |
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Würth Elektronik
|
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40 A | - | 0.28mOhm Primary, 50.1Ohm Secondary | 1860Vµs | 1MHz | 0.413" (10.50mm) | 300 mH | Surface Mount | AEC-Q200 | 0.570" L x 0.524" W (14.48mm x 13.30mm) | Gull Wing | 1:750 | Invasive | |
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TDK Corporation
|
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- | - | 2.5mOhm Primary, 21Ohm Secondary | 43.2VµS | 50kHz ~ 1MHz | 0.138" (3.50mm) | 1.84 mH | Surface Mount | - | 0.185" L x 0.138" W (4.70mm x 3.50mm) | J Lead | 1:150 | Invasive | |
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TDK Corporation
|
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- | - | - | - | 50kHz ~ 1MHz | 0.138" (3.50mm) | 132 µH | Surface Mount | - | 0.185" L x 0.138" W (4.70mm x 3.50mm) | J Lead | - | Invasive | |
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TDK Corporation
|
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- | - | - | - | 50kHz ~ 1MHz | 0.138" (3.50mm) | 205 µH | Surface Mount | - | 0.185" L x 0.138" W (4.70mm x 3.50mm) | J Lead | - | Invasive | |
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TDK Corporation
|
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- | - | - | - | 50kHz ~ 1MHz | 0.138" (3.50mm) | 400 µH | Surface Mount | - | 0.185" L x 0.138" W (4.70mm x 3.50mm) | J Lead | - | Invasive | |
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TDK Corporation
|
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- | - | - | - | 50kHz ~ 1MHz | 0.138" (3.50mm) | 295 µH | Surface Mount | - | 0.185" L x 0.138" W (4.70mm x 3.50mm) | J Lead | - | Invasive | |
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Würth Elektronik
|
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- | - | 6mOhm Primary, 480mOhm Secondary | 15VµS | - | 0.210" (5.33mm) | 180 µH | Surface Mount | - | 0.303" L x 0.272" W (7.70mm x 6.90mm) | Gull Wing | 1:30 | Invasive | |
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Würth Elektronik
|
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- | - | 6mOhm Primary, 900mOhm Secondary | 20VµS | - | 0.210" (5.33mm) | 320 µH | Surface Mount | - | 0.303" L x 0.272" W (7.70mm x 6.90mm) | Gull Wing | 1:40 | Invasive | |
|
Bourns
|
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40 A | 80:1 | 1mOhm Primary, 1.15Ohm Secondary Max | 203.2VµS | 1MHz | 0.413" (10.50mm) | 5.44 mH | Surface Mount | - | - | Gull Wing | 1:80 | Invasive | |
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TDK Corporation
|
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- | - | - | - | - | 0.394" (10.00mm) | - | Surface Mount | - | 0.476" L x 0.425" W (12.10mm x 10.80mm) | - | 1:100 | - | |
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Bourns
|
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40 A | 40:1 | 1mOhm Primary, 560mOhm Secondary Max | 101.6VµS | 1MHz | 0.413" (10.50mm) | 1.36 mH | Surface Mount | - | - | Gull Wing | 1:40 | Invasive | |
|
Bourns
|
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40 A | 200:1 | 1mOhm Primary, 4.06Ohm Secondary Max | 508VµS | 1MHz | 0.413" (10.50mm) | 34 mH | Surface Mount | - | - | Gull Wing | 1:200 | Invasive | |
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Würth Elektronik
|
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7 A | - | 3mOhm Primary, 9.5Ohm Secondary | 45VµS | 1MHz | 0.140" (3.55mm) | 820 µH | Surface Mount | - | 0.185" L x 0.183" W (4.70mm x 4.65mm) | Gull Wing | 1:100 | Invasive | |
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Würth Elektronik
|
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- | - | 6mOhm Primary, 1.4Ohm Secondary | 25VµS | - | 0.210" (5.33mm) | 500 µH | Surface Mount | - | 0.303" L x 0.272" W (7.70mm x 6.90mm) | Gull Wing | 1:50 | Invasive | |
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Würth Elektronik
|
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- | - | 6mOhm Primary, 200mOhm Secondary | 10VµS | - | 0.210" (5.33mm) | 80 µH | Surface Mount | - | 0.303" L x 0.272" W (7.70mm x 6.90mm) | Gull Wing | 1:20 | Invasive | |
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Bourns
|
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20 A | 100:1 | 7mOhm Primary, 5.5Ohm Secondary Max | 54VµS | 1MHz | 0.209" (5.31mm) | 2 H | Surface Mount | - | 0.245" L x 0.235" W (6.22mm x 5.97mm) | Gull Wing | 1:100 | Invasive | |
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Bourns
|
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20 A | 125:1 | 7mOhm Primary, 7Ohm Secondary Max | 67.5VµS | 1MHz | 0.209" (5.31mm) | 3 H | Surface Mount | - | 0.245" L x 0.235" W (6.22mm x 5.97mm) | Gull Wing | 1:125 | Invasive | |
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Bourns
|
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20 A | 20:1 | 7mOhm Primary, 400mOhm Secondary Max | 10.8VµS | 1MHz | 0.209" (5.31mm) | 81 mH | Surface Mount | - | 0.245" L x 0.235" W (6.22mm x 5.97mm) | Gull Wing | 1:20 | Invasive | |
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Amgis, LLC
|
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- | - | - | - | - | 0.709" (18.00mm) | - | - | - | 0.571" L x 0.772" W (14.50mm x 19.60mm) | - | - | - | |
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Vacuumschmelze
|
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6 A | 1500:1 | 44Ohm | - | 50Hz | 0.748" (19.00mm) | 8 H | Through Hole | - | 0.661" L x 0.354" W (16.80mm x 9.00mm) | PC Pin | 1:1500 | Non-Invasive (Solid Core) | |
|
TDK Corporation
|
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- | - | 0.5mOhm Primary, 4Ohm Secondary | - | 50kHz ~ 250kHz | 0.567" (14.40mm) | 11 mH | Surface Mount | - | 0.504" L x 0.535" W (12.80mm x 13.60mm) | Gull Wing | 1:125 | Invasive | |
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TDK Corporation
|
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- | - | 1.9mOhm Primary, 2.9Ohm Secondary | - | 50kHz ~ 250kHz | 0.433" (11.00mm) | 3 mH | Surface Mount | - | 0.417" L x 0.480" W (10.60mm x 12.20mm) | Gull Wing | 1:70 | Invasive | |
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Amgis, LLC
|
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- | - | - | - | - | 0.701" (17.80mm) | - | - | - | 0.701" L x 0.902" W (17.80mm x 22.90mm) | - | - | - | |
|
CR Magnetics Inc.
|
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10 A | 1000:1 | 49Ohm | - | 20Hz ~ 1kHz | 0.325" (8.26mm) | - | Free Hanging (In-Line) | - | 0.880" L x 0.690" W (22.35mm x 17.53mm) | Wire Leads | - | Non-Invasive (Solid Core) | |
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Famatel USA
|
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500 A | 500:5 | - | - | - | 1.100" (27.94mm) | - | Free Hanging (In-Line) | - | 3.560" Dia (90.42mm) | Wire Leads | 100:1 | Non-Invasive (Solid Core) | |
|
Murata
|
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10 A | 100:1 | - | - | 20kHz ~ 200kHz | 0.795" (20.16mm) | - | Through Hole | - | 0.661" L x 0.350" W (16.79mm x 8.89mm) | PC Pin | - | Non-Invasive (Solid Core) | |
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Murata
|
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10 A | 300:1 | 5.73mOhm Primary, 8.59mOhm Secondary | - | 20kHz ~ 200kHz | 0.795" (20.19mm) | - | Through Hole | - | 0.661" L x 0.350" W (16.79mm x 8.89mm) | PC Pin | - | Non-Invasive (Solid Core) | |
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Pulse Electronics
|
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- | - | 6mOhm Primary, 550mOhm Secondary | - | 50kHz ~ 1MHz | 0.217" (5.50mm) | 80 µH | Surface Mount | - | 0.284" L x 0.330" W (7.21mm x 8.38mm) | Gull Wing | 1:20 | Invasive | |
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TDK Corporation
|
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- | - | 0.28mOhm Primary, 1Ohm Secondary | - | 50kHz ~ 500kHz | 0.394" (10.00mm) | 5.6 mH | Surface Mount | - | 0.560" L x 0.530" W (14.22mm x 13.46mm) | Gull Wing | 1:100 | Invasive | |
|
Pulse Electronics
|
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4 A | - | 4mOhm Primary, 900mOhm Secondary | - | 50kHz ~ 1MHz | 0.124" (3.15mm) | 1.7 mH | Surface Mount | - | 0.285" L x 0.352" W (7.25mm x 8.25mm) | - | 1:50 | Invasive | |
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Pulse Electronics
|
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35 A | - | 0.42mOhm Primary, 1.4Ohm Secondary | - | 50kHz ~ 500kHz | 0.394" (10.00mm) | 5.6 mH | Surface Mount | - | 0.591" L x 0.784" W (15.00mm x 19.91mm) | Gull Wing | 100:1 | Invasive | |
|
Yageo
|
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- | - | 30Ohm | - | 60Hz | 0.311" (7.90mm) | - | Through Hole | - | 0.748" L x 0.689" W (19.00mm x 17.50mm) | PC Pin | - | Non-Invasive (Solid Core) | |
|
Yageo
|
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10 A | 1000:1 | - | - | 50/60Hz | 0.882" (22.40mm) | - | Through Hole | - | 0.709" L x 0.280" W (18.00mm x 7.10mm) | Wire Leads | 1000:1 | Non-Invasive (Solid Core) | |
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CR Magnetics Inc.
|
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200 A | 2000:1 | 73Ohm | - | 20Hz ~ 1kHz | 1.535" (39.00mm) | - | Through Hole | - | 1.476" L x 0.551" W (37.50mm x 14.00mm) | PC Pin | - | Non-Invasive (Solid Core) | |
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CR Magnetics Inc.
|
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100 A | 100:5 | - | - | 50Hz ~ 400Hz | 2.681" (68.10mm) | - | Chassis Mount | - | 2.681" L x 2.000" W (68.10mm x 44.50mm) | PC Pin | - | Non-Invasive (Solid Core) | |
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CR Magnetics Inc.
|
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- | - | - | - | 50Hz ~ 400Hz | - | - | Free Hanging (In-Line) | - | 1.094" L x 0.866" W (27.80mm x 22.00mm) | - | - | Non-Invasive (Solid Core) | |
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Seeed Technology Co., Ltd
|
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5 A | - | - | - | - | - | - | Chassis Mount | - | - | Wire Leads with Connector | - | Non-Invasive (Split Core) | |
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TDK Corporation
|
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30 A | 3000:1 | 492Ohm | - | 50/60Hz | 1.260" (32.00mm) | - | Chassis Mount | - | 1.126" L x 0.728" W (28.60mm x 18.50mm) | Wire Leads with Connector | - | Non-Invasive (Split Core) | |
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TDK Corporation
|
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100 A | 3000:1 | 285Ohm | - | 50/60Hz | 1.870" (47.50mm) | - | Chassis Mount | - | 1.378" L x 1.280" W (35.00mm x 32.50mm) | Wire Leads with Connector | - | Non-Invasive (Split Core) | |
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TDK Corporation
|
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300 A | 3000:1 | 103Ohm | - | 50/60Hz | 2.835" (72.00mm) | - | Chassis Mount | - | 1.909" L x 1.555" W (48.50mm x 39.50mm) | Wire Leads with Connector | - | Non-Invasive (Split Core) | |
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Hammond Manufacturing
|
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5 A | 50:5 | - | - | - | 3.250" (82.55mm) | - | Chassis Mount | - | 3.750" L x 1.750" W (95.25mm x 44.45mm) | Wire Leads | - | Non-Invasive (Solid Core) | |
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Littelfuse Inc.
|
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50 A | 50:5 | - | - | - | - | - | Free Hanging (In-Line) | - | 2.461" Dia (62.50mm) | Wire Leads | - | Non-Invasive (Solid Core) | |
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Hammond Manufacturing
|
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5 A | 100:5 | - | - | - | 3.250" (82.55mm) | - | Chassis Mount | - | 3.750" L x 1.750" W (95.25mm x 44.45mm) | Wire Leads | - | Non-Invasive (Solid Core) | |
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Hammond Manufacturing
|
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5 A | 1200:5 | - | - | - | 7.250" (184.15mm) | - | Chassis Mount | - | 8.000" L x 1.750" W (203.20mm x 44.45mm) | Wire Leads | - | Non-Invasive (Solid Core) | |
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Littelfuse Inc.
|
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- | - | - | - | - | - | - | - | - | - | - | - | - | |
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Murata
|
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10 A | 300CT:1 | 5.73Ohm Primary, 8.59Ohm Secondary | - | 20kHz ~ 200kHz | 0.795" (20.19mm) | - | Through Hole | - | 0.661" L x 0.350" W (16.79mm x 8.89mm) | PC Pin | - | Non-Invasive (Solid Core) |
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