If you are looking for the polarity of Eaton’s UNI-PAC™ series drum core power inductors, here is some information from the manufacturer:
These inductors do not have polarity. However, the marking on the body, such as a dot, provides additional information. In this case, the dot indicates the start point of the winding. Note that the product will function the same regardless of orientation or polarity in most typical applications.
Applicable Part Numbers
| DigiKey Part Number | Manufacturer Part Number |
|---|---|
| 513-1185-2-ND,513-1185-1-ND,513-1185-6-ND | UP2B-100-R |
| 513-1076-2-ND,513-1076-1-ND,513-1076-6-ND | UP2B-150-R |
| 513-1069-2-ND,513-1069-1-ND,513-1069-6-ND | UP1B-220-R |
| 513-1181-2-ND,513-1181-1-ND,513-1181-6-ND | UP1B-1R0-R |
| 513-1230-2-ND,513-1230-1-ND,513-1230-6-ND | UP2B-220-R |
| 513-1182-2-ND,513-1182-1-ND,513-1182-6-ND | UP1B-4R7-R |
| 513-1183-2-ND,513-1183-1-ND,513-1183-6-ND | UP1B-R47-R |
| 513-1080-2-ND,513-1080-1-ND,513-1080-6-ND | UP2B-330-R |
| 513-1079-2-ND,513-1079-1-ND,513-1079-6-ND | UP2B-221-R |
| 513-1083-2-ND,513-1083-1-ND,513-1083-6-ND | UP2B-680-R |
| 283-UP4B-680-RTR-ND,283-UP4B-680-RCT-ND,283-UP4B-680-RDKR-ND | UP4B-680-R |
| 513-1066-2-ND,513-1066-1-ND,513-1066-6-ND | UP1B-101-R |
| 513-1180-2-ND,513-1180-1-ND,513-1180-6-ND | UP1B-100-R |
| 513-1073-2-ND,513-1073-1-ND,513-1073-6-ND | UP1B-470-R |
| 283-4075-2-ND,283-4075-1-ND,283-4075-6-ND | UP1B-3R3-R |
| 513-1071-2-ND,513-1071-1-ND,513-1071-6-ND | UP1B-330-R |
| 513-1233-2-ND,513-1233-1-ND,513-1233-6-ND | UP4B-151-R |
| 283-4078-2-ND,283-4078-1-ND,283-4078-6-ND | UP2B-471-R |
| 283-UP3B-4R7-RTR-ND,283-UP3B-4R7-RCT-ND,283-UP3B-4R7-RDKR-ND | UP3B-4R7-R |
| 513-1556-2-ND,513-1556-1-ND,513-1556-6-ND | UP2B-2R2-R |
| 513-1186-2-ND,513-1186-1-ND,513-1186-6-ND | UP2B-1R0-R |
| 283-4080-2-ND,283-4080-1-ND,283-4080-6-ND | UP2B-6R8-R |
| 513-1187-2-ND,513-1187-1-ND,513-1187-6-ND | UP2B-4R7-R |
| 513-1089-2-ND,513-1089-1-ND,513-1089-6-ND | UP3B-330-R |
| 283-UP3B-1R0-RTR-ND,283-UP3B-1R0-RCT-ND,283-UP3B-1R0-RDKR-ND | UP3B-1R0-R |
| 513-1084-2-ND,513-1084-1-ND,513-1084-6-ND | UP3B-100-R |
| 513-1088-2-ND,513-1088-1-ND,513-1088-6-ND | UP3B-220-R |
| 513-1093-2-ND,513-1093-1-ND,513-1093-6-ND | UP4B-101-R |
| 513-1096-2-ND,513-1096-1-ND,513-1096-6-ND | UP4B-220-R |
| 513-1094-2-ND,513-1094-1-ND,513-1094-6-ND | UP4B-150-R |
| 283-UP4B-100-RTR-ND,283-UP4B-100-RCT-ND,283-UP4B-100-RDKR-ND | UP4B-100-R |
| 513-1098-2-ND,513-1098-1-ND,513-1098-6-ND | UP4B-470-R |
| 513-1668-2-ND,513-1668-1-ND,513-1668-6-ND | UP1B-2R2-R |
| 283-4076-2-ND,283-4076-1-ND,283-4076-6-ND | UP1B-6R8-R |
| 513-1072-2-ND,513-1072-1-ND,513-1072-6-ND | UP1B-331-R |
| 513-1077-2-ND,513-1077-1-ND,513-1077-6-ND | UP2B-151-R |
| 513-1081-2-ND,513-1081-1-ND,513-1081-6-ND | UP2B-331-R |
| 513-1075-2-ND,513-1075-1-ND,513-1075-6-ND | UP2B-101-R |
| 513-1232-2-ND,513-1232-1-ND,513-1232-6-ND | UP3B-470-R |
| 283-UP3B-2R2-RTR-ND,283-UP3B-2R2-RCT-ND,283-UP3B-2R2-RDKR-ND | UP3B-2R2-R |
| 283-UP4B-1R0-RTR-ND,283-UP4B-1R0-RCT-ND,283-UP4B-1R0-RDKR-ND | UP4B-1R0-R |
| 513-1234-2-ND,513-1234-1-ND,513-1234-6-ND | UP4B-221-R |
| 283-UP1B-1R5-RTR-ND,283-UP1B-1R5-RCT-ND,283-UP1B-1R5-RDKR-ND | UP1B-1R5-R |
| 283-UP2B-820-RTR-ND,283-UP2B-820-RCT-ND,283-UP2B-820-RDKR-ND | UP2B-820-R |
| 2266-UP4B-331-RTR-ND,283-UP4B-331-RTR-ND | UP4B-331-R |
| 513-1085-2-ND,513-1085-1-ND,513-1085-6-ND | UP3B-101-R |
| 513-1090-2-ND,513-1090-1-ND,513-1090-6-ND | UP3B-331-R |
| 513-1082-2-ND,513-1082-1-ND,513-1082-6-ND | UP2B-470-R |
| 513-1670-2-ND,513-1670-1-ND,513-1670-6-ND | UP4B-330-R |
| 513-1228-2-ND,513-1228-1-ND,513-1228-6-ND | UP1B-150-R |
| 513-1765-2-ND,513-1765-1-ND,513-1765-6-ND | UP4B-6R8-R |
| 513-1074-2-ND,513-1074-1-ND,513-1074-6-ND | UP1B-680-R |
| 513-1070-2-ND,513-1070-1-ND,513-1070-6-ND | UP1B-221-R |
| 283-4086-2-ND,283-4086-1-ND,283-4086-6-ND | UP4B-2R2-R |
| 283-UP1B-151-RTR-ND,283-UP1B-151-RCT-ND,283-UP1B-151-RDKR-ND | UP1B-151-R |
| 283-UP2B-821-RTR-ND | UP2B-821-R |
| 283-UP2B-102-RTR-ND | UP2B-102-R |
| 283-UP2B-1R5-RTR-ND | UP2B-1R5-R |
| 283-4077-2-ND,283-4077-1-ND,283-4077-6-ND | UP2B-3R3-R |
| 283-UP3B-1R5-RTR-ND | UP3B-1R5-R |
| 283-UP3B-151-RTR-ND,283-UP3B-151-RCT-ND,283-UP3B-151-RDKR-ND | UP3B-151-R |
| 283-UP3B-150-RTR-ND | UP3B-150-R |
| 283-UP3B-6R8-RTR-ND | UP3B-6R8-R |
| 283-UP3B-R47-RTR-ND | UP3B-R47-R |
| 513-1092-2-ND,513-1092-1-ND,513-1092-6-ND | UP3B-680-R |
| 283-UP4B-R47-RTR-ND | UP4B-R47-R |
| 283-UP4B-4R7-RTR-ND | UP4B-4R7-R |
| 283-UP4B-1R5-RTR-ND | UP4B-1R5-R |
| 283-UP4B-471-RTR-ND | UP4B-471-R |
| 283-4082-2-ND,283-4082-1-ND,283-4082-6-ND | UP2B-R47-R |
| 283-4079-2-ND,283-4079-1-ND,283-4079-6-ND | UP2B-681-R |
| 283-UP3B-3R3-RTR-ND,283-UP3B-3R3-RCT-ND,283-UP3B-3R3-RDKR-ND | UP3B-3R3-R |
| 283-4087-2-ND,283-4087-1-ND,283-4087-6-ND | UP4B-3R3-R |