| PartNumber | 166F2 | 166F20 | 166F25 |
| Description | Power Transformers FIL RECT | Power Transformers FIL RECT | Power Transformers 25ct VAC / .3 Amp |
| Manufacturer | Hammond Manufacturing | Hammond Manufacturing | Hammond Manufacturing |
| Product Category | Power Transformers | Power Transformers | Power Transformers |
| Series | 166 | 166 | 166 |
| Product | Power Transformers | Power Transformers | Power Transformers |
| Type | Laminated Core | Laminated Core | Laminated Core |
| Unit Weight | 4.800049 oz | 8.000082 oz | 11.200115 oz |
| Mounting Style | Chassis | Chassis | Chassis |
| Termination Style | Wire Leads | Wire Leads | Wire Leads |
| Operating Temperature Range | 0 C to + 130 C | 0 C to + 130 C | 0 C to + 130 C |
| Height | 30.23 mm | 35.05 mm | 42.93 mm |
| Length | 52.32 mm | 60.45 mm | 71.37 mm |
| Width | 31.75 mm | 38.1 mm | 38.1 mm |
| Mounting Type | Chassis Mount | Chassis Mount | Chassis Mount |
| Size Dimension | 52.32mm L x 31.75mm W | 60.45mm L x 38.10mm W | 71.37mm L x 38.10mm W |
| Current Output Max | 250mA | 300mA | 300mA |
| Power Max | 0.63 VA | 6 VA | 7.5 VA |
| Voltage Isolation | 2000Vrms | 2000Vrms | 2000Vrms |
| Height Seated Max | 30.23mm | 35.05mm | 42.93mm |
| Voltage Primary | 115V | 115V | 115V |
| Voltage Secondary Full Load | 2.5V | 20V | 25V |
| Primary Winding s | Single | Single | Single |
| Secondary Winding s | Single | Single | Single |
| Center Tap | Yes | Yes | Yes |
| Power Rating | 0.63 VA | 6 VA | 7.5 VA |
| Primary Voltage Rating | 115 VAC | 115 VAC | 115 VAC |
| Secondary Voltage Rating | 2.5 VAC CT | 20 VAC CT | 25 VAC CT |
| Secondary Current Rating | 250 mA | 300 mA | 300 mA |
| Primary Winding | Single Primary Winding | Single Primary Winding | Single Primary Winding |
| Secondary Winding | Single Secondary Winding | Single Secondary Winding | Single Secondary Winding |
| Operating Frequency | 50 Hz 60 Hz | 50 Hz 60 Hz | 50 Hz 60 Hz |
| Packaging | - | Bulk | - |