PPM offers a wide range of wirewound resistors from Ohmite and Heine, depending on the application. Wirewound resistors are constructed using conductive wire wound around a non-conductive core. They offer good energy rating and power dissipation for applications such as braking, and EV charging.
They come in different types, such as axial, tubular, or also enclosed cage where higher power dissipation is needed.
Use the chat box, email sales@ppm.co.uk or call +44 (0)1793 784389. We can help you to find what you need for your project.
Tubular and Leaded Wirewound Resistors
| Part Number | Nominal Continuous Power (W) | Resistance Values (Ohms) | Max. Operating Voltage | Standard Tolerance at 20 Deg. C (+/- %) | Datasheet |
|---|---|---|---|---|---|
| 20 Series | 1-10 | 1-100k | 720 VDC | +/- 5% | 20 Series |
| 40 Series | 1-10 | 0.1-150k | 1000 VDC | +/- 1% or 5% | 40 Series |
| 80 Series | 1-10 | 0.1-150k | 1000 VDC | +/- 1% or 5% | 80 Series |
| 200 series | 5.25-20 | 0.03-100k | 750 VDC | +/- 5% | 200 Series |
| 210 Series | 12-1000 | 1-100k | 8900 VDC | +/- 10% | 210 Series |
| 270 Series | 12-1000 | 0.1-392k | 8900 VDC | +/- 5% | 270 Series |
| 280 Series | 35-1500 | 0.1-358 | 730 VDC | +/- 10% | 280 Series |
| RW-5 | 120 - 280 | 0.2 - 3380 | 600 VAC / 800 VDC | +/- 10% | 0150 |
| RW-S5 | 120 - 280 | 0.2 - 3380 | 600 VAC / 800 VDC | +/- 10% | 0151 |
| RW-8 | 300 - 670 | 0.5 - 8000 | 600 VAC / 800 VDC | +/- 10% | 0180 |
| RWS-8 | 300 - 670 | 0.5 - 8000 | 600 VAC / 800 VDC | +/- 10% | 0181 |
| RAF 100-8 | 700 - 1200 | 2.5 - 184 | 1000 VDC | +/- 10% | 0010 |
| RAF 100-8UL | 0.7 - 1100 | 2.5 - 184 | 1000 VDC | +/- 10% | 0013 |
| RAFS-2 | 1000 - 2000 | 1.8 - 180 | 600 VAC / 800 VDC | +/- 10% | 0020 |
Heine wire-wound tube and frame resistors incorporate low inductive design into a variety of packages. These resistors are available with thermal switches and as completely custom designs, see below for some example parts and datasheets.
- Resistance coils – which can also be designed to be low-inductance – are attached to ceramic tubes of various diameters. Clips that also act as electrical connections are used for securing the resistance wire at either end of the coil.
- Frames are made from electrically insulating or metallic materials – remaining firmly supported and fixed even at higher temperature.
Enclosed Wirewound Resistors
| Part Number | Nominal Continuous Power (W) | Resistance Values (Ohms) | Max. Operating Voltage | Protection | Standard Tolerance at 20 Deg. C (+/- %) | Datasheet |
|---|---|---|---|---|---|---|
| EFm-5 | 120 - 280 | 0.2 - 3380 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1150 |
| EFmA-5 | 120 - 280 | 0.2 - 3380 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1151 |
| EFm-8 | 300 - 670 | 0.5 - 8000 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1180 |
| EFmA-8 | 300 - 670 | 0.5 - 8000 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1181 |
| ZFm-8 | 600 - 1340 | 0.2 - 4000 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1280 |
| ZFmA-8 | 600 - 1340 | 0.2 - 4000 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1281 |
| RF-6UL | 1400 - 4200 | 1 - 320 | 1000 VDC | IP20 | +/- 10% | 1063 |
| RFBs-6UL | 1400 - 4200 | 1 - 180 | 600 VDC | IP20 | +/- 10% | 1064 |
| RF-6 | 2000 - 6000 | 1 - 180 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1060 |
| RFBs-6 | 2000 - 6000 | 1 - 180 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1061 |
| RF-12UL | 6400 - 9600 | 2 - 125 | 1000 VDC | IP20 | +/- 10% | 1123 |
| RFC-12UL | 6400 - 9600 | 2 - 45 | 600 VDC | IP20 | +/- 10% | 1125 |
| RF-12 | 8000 - 12000 | 2 - 45 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1120 |
| RFC-12 | 8000 - 12000 | 2 - -45 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1122 |
| RF-18UL | 9800 - 12600 | 3.5 - 71 | 1000 VDC | IP20 | +/- 10% | 1183 |
| RFC-18UL | 9800 - 12600 | 3.5 - 26 | 600 VDC | IP20 | +/- 10% | 1185 |
| RF-18 | 14000 - 18000 | 3.5 - 26 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1180 |
| RFC-18 | 14000 - 18000 | 3.5 - 26 | 600 VAC / 800 VDC | IP20 | +/- 10% | 1182 |
Load Bank
| Element Voltage (V) | Element Power (kW) | Maximum Alloy Overload Temperature (Deg. C) | Maximum Operating Temperature (Deg. C) | |
|---|---|---|---|---|
| Metallic Load Bank | 240/480 | 8.33 | 1300 | 600 |
Need a custom design or just not sure? Call +44 (0)1793 784389 to speak to our technical support staff.
