High Power Current Sensing Resistors
Fort Technology's High Power Current Sensing Resistors are designed for applications requiring precise current sensing, voltage division, and pulse handling. These resistors feature a stable alloy material with ultra-low TCR (50ppm/C), enabling high temperature derating up to +170C. They are suitable for high-precision current sensing and circuit protection, offering excellent stability with a low resistance change over time. The pure tin plating ensures compatibility with both lead-free and lead-containing soldering processes. Constructed with high-grade materials and protected by a robust coating, these resistors meet RoHS directive 2011/65/EU, are Halogen-free, and utilize flame-retardant material compliant with UL94 V-0 requirements.
Product Attributes
- Brand: Fort Technology Co., Ltd
- Material: Stable alloy (FeCrAl, MnCuSn, MnCu)
- Certifications: RoHS directive 2011/65/EU, Halogen free, UL94 V-0
- Plating: Pure tin
Technical Specifications
| Model | Power Rating at 70 | T.C.R. (ppm/) | Max. Rating Current (A) | Max. Overload Current (A) | Resistance Range (m) | Material | Operating Temperature Range () |
| CUM1206 | 0.75W | ≤±50 | 31.62 | 63.24 | R001: 1~50 R051~R075: 51~75 | MnCuSn, FeCrAl | -55~+170 |
| CUM2512 | 1W | ≤±50 | 31.62 | 70.71 | R001~R006: 5~500 R007~R500: 5~500 | MnCu, FeCrAl | -55~+170 |
| CUM2512 | 2W | ≤±50 | 44.72 | 100.00 | R001~R006: 5~450 R007~R450: 5~450 | MnCu, FeCrAl | -55~+170 |
| CUM2512 | 3W | ≤±50 | 54.77 | 122.47 | R001~R006: 5~100 R007~R100: 5~100 | MnCu, FeCrAl | -55~+170 |
| CUM2725 | 4W | ≤±50 | 126.49 | 252.98 | R0002~R0004: 0.2 R0005~R0025: 0.25~3 R003: 0.2 | MnCuSn, MnCu, FeCrAl | -55~+170 |
| CUM2728 | 4W | ≤±50 | 31.62 | 63.24 | R004~R450: 4~450 | FeCrAl | -55~+170 |
| CUM4527 | 2W | ≤±50 | 44.72 | 100.00 | R001~R005: 7~100 R006~R100: 7~100 | MnCu, FeCrAl | -55~+170 |
| CUM4527 | 3W | ≤±50 | 54.77 | 122.47 | R001~R005: 7~60 R006~R060: 7~60 | MnCu, FeCrAl | -55~+170 |
| CUM4527 | 5W | ≤±50 | 70.71 | 122.47 | R001~R005: 7~500 R006~R500: 7~500 | MnCu, FeCrAl | -55~+170 |
Ordering Information
Example: CUM 2512 - 1 4 F R003
Model: CUM 1206, 2512, 2725, 2728, 4527
Size: (Refer to Model)
Power Rating (Watts): B: 0.5W, C: 0.75W, 1: 1.0W, D: 1.5W, 2: 2.0W, 3: 3.0W, 4: 4.0W, 5: 5.0W
Tolerance: D=0.5%, F=1.0%, G=2.0%, J=5.0%
Resistance: R003: 3m, R100: 100m (Format: Rxxx for ohms, 0mxx for milliohms)
Packing: 1: 1,000pcs, 2: 2,000pcs, 4: 4,000pcs, 5: 5,000pcs
Dimensions (mm)
| TYPE | Power Rating | Resistance Range | L | W | H | T1 | T2 |
| 1206 | 0.75W | 51~75m | 3.200±0.254 | 1.650±0.254 | 0.400±0.254 | 0.508±0.254 | 0.508±0.254 |
| 1206 | 1W | 1m~50m | 0.820±0.254 | 2.000±0.254 | 0.700±0.254 | 1.980±0.254 | 2.000±0.254 |
| 2512 | 1W | 451~500m | 6.350±0.254 | 3.050±0.254 | 0.350±0.254 | 0.750±0.254 | 0.850±0.254 |
| 2512 | 1W, 2W | 0.5m~0.75m | 6.350±0.254 | 3.050±0.254 | 0.820±0.254 | 1.980±0.254 | 2.000±0.254 |
| 2512 | 1W, 2W | 1m~500m | 6.350±0.254 | 3.050±0.254 | 0.700±0.254 | 0.750±0.254 | 0.850±0.254 |
| 2512 | 2W | 0.5m~0.75m | 6.350±0.254 | 3.050±0.254 | 0.820±0.254 | 1.980±0.254 | 2.000±0.254 |
| 2512 | 3W | 0.5m~0.75m | 6.350±0.254 | 3.050±0.254 | 0.820±0.254 | 1.980±0.254 | 2.000±0.254 |
| 2512 | 3W | 1m~100m | 6.350±0.254 | 3.050±0.254 | 0.720±0.254 | 1.980±0.254 | 2.200±0.254 |
| 2725 | 4W | 0.2m~0.8m | 6.900±0.254 | 6.350±0.254 | 1.100±0.254 | 1.20±0.254 | 2.150±0.254 |
| 2725 | 4W | 1m~3m | 6.900±0.254 | 6.350±0.254 | 0.650±0.254 | 1.15±0.254 | 1.800±0.254 |
| 2728 | 4W | 4m~450m | 6.600±0.254 | 6.700±0.254 | 0.580±0.254 | 0.40±0.254 | 1.050±0.254 |
| 4527 | 2W | 0.5m~1.5m | 11.300±0.500 | 6.600±0.500 | 0.770±0.254 | 0.90±0.254 | 3.000±0.254 |
| 4527 | 2W | 2m~100m | 11.300±0.500 | 6.600±0.500 | 0.650±0.254 | 1.5±0.254 | 2.000±0.254 |
| 4527 | 3W | 0.5m~1.5m | 11.300±0.500 | 6.600±0.500 | 0.770±0.254 | 0.90±0.254 | 3.000±0.254 |
| 4527 | 3W | 2m~60m | 11.300±0.500 | 6.600±0.500 | 0.550±0.254 | 1.100±0.254 | 2.000±0.254 |
| 4527 | 5W | 0.5m~1.5m | 11.300±0.500 | 6.600±0.500 | 0.800±0.254 | 0.65±0.254 | 3.000±0.254 |
| 4527 | 5W | 2m~500m | 11.300±0.500 | 6.600±0.500 | 0.580±0.254 | 0.680±0.254 | 2.000±0.254 |
2410121255_FORT-CUM1206-15FR004_C5185587.pdf
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