Littelfuse offers a wide array of instrument-rated current transformers in 1-3 inch diameter openings. These transformers are designed for instrumentation and metering applications.
| Model | Style | Window Size | Current Ratio |
| CT-0050-D10 | Donut | 1.0" | 50:5 |
| CT-0075-D10 | Donut | 1.0" | 75:5 |
| CT-0100-D10 | Donut | 1.0" | 100:5 |
| CT-0150-D10 | Donut | 1.0" | 150:5 |
| CT-0200-D10 | Donut | 1.0" | 200:5 |
| CT-0300-D10 | Donut | 1.0" | 300:5 |
| CT-0200-D20 | Donut | 2.0" | 200:5 |
| CT-0300-D20 | Donut | 2.0" | 300:5 |
| CT-0400-D20 | Donut | 2.0" | 400:5 |
| CT-0500-D20 | Donut | 2.0" | 500:5 |
| CT-0050-F10 | Foot Mounted | 1.0" | 50:5 |
| CT-0100-F10 | Foot Mounted | 1.0" | 100:5 |
| CT-0150-F10 | Foot Mounted | 1.0" | 150:5 |
| CT-0200-F10 | Foot Mounted | 1.0" | 200:5 |
| CT-0300-F10 | Foot Mounted | 1.0" | 300:5 |
| CT-1200-F15 | Foot Mounted | 1.5" | 1200:5 |
| CT-0150-F20 | Foot Mounted | 2.0" | 150:5 |
| CT-0200-F20 | Foot Mounted | 2.0" | 200:5 |
| CT-0300-F20 | Foot Mounted | 2.0" | 300:5 |
| CT-0400-F20 | Foot Mounted | 2.0" | 400:5 |
| CT-0600-F20 | Foot Mounted | 2.0" | 600:5 |
| CT-0400-F30 | Foot Mounted | 3.0" | 400:5 |
| CT-0800-F30 | Foot Mounted | 3.0" | 800:5 |
Part Numbering System: CT - xxx - D10 / F10 / F15 / F20 / F30
Style Series: D = Donut Style, F = Footed Style
Window Size: 10 = 1.0 inch, 15 = 1.5 inches, 20 = 2.0 inches, 30 = 3.0 inches
Current Ratio: xxx:5
Disclaimer Notice Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.