| PartNumber | 187C28 | 187C20 | 187C24 |
| Description | Power Transformers Single Primary 115V 12VA, 28V CT @0.42A | Power Transformers Single Primary 115V 12VA, 20V CT @0.6A | Power Transformers Single Primary 115V 12VA, 24V CT @0.5A |
| Manufacturer | Hammond | Hammond Manufacturing | Hammond Manufacturing |
| Product Category | Power Transformers | Power Transformers | Power Transformers |
| RoHS | Y | - | - |
| Product | Transformer | - | - |
| Primary Voltage Rating | 115 VAC | - | - |
| Secondary Voltage Rating | 28 VAC CT | - | - |
| Power Rating | 12 VA | - | - |
| Secondary Current Rating | 420 mA | - | - |
| Mounting Style | Chassis | - | - |
| Primary Winding | Single Primary Winding | - | - |
| Secondary Winding | Single Secondary Winding | - | - |
| Length | 71.37 mm | - | - |
| Width | 34.79 mm | - | - |
| Height | 41.14 mm | - | - |
| Series | 186-187 | 187 | 187 |
| Operating Frequency | 50 Hz, 60 Hz | - | - |
| Termination Style | Quick Connects | Solder, Quick Connect | Solder, Quick Connect |
| Type | Low Voltage, Connect Terminals | Laminated Core | Laminated Core |
| Brand | Hammond Manufacturing | - | - |
| Product Type | Power Transformers | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Transformers | - | - |
| Unit Weight | 10.879991 oz | - | - |
| Mounting Type | - | Chassis Mount | Chassis Mount |
| Size Dimension | - | 71.37mm L x 43.82mm W | 71.37mm L x 43.82mm W |
| Current Output Max | - | 600mA | 500mA |
| Power Max | - | 12 VA | 12 VA |
| Voltage Isolation | - | 2000Vrms | 2000Vrms |
| Height Seated Max | - | 41.15mm | 41.15mm |
| Voltage Primary | - | 115V | 115V |
| Voltage Secondary Full Load | - | 20V | 24V |
| Primary Winding s | - | Single | Single |
| Secondary Winding s | - | Single | Single |
| Center Tap | - | Yes | Yes |