| BODY HEIGHT | 1.625 INCHES MINIMUM AND 1.750 INCHES MAXIMUM |
| BODY LENGTH | 1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM |
| BODY WIDTH | 1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP |
| FREQUENCY RATING | 3.5 KILOHERTZ MINIMUM AND 7.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| IMPEDANCE RATING IN OHMS | 200.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| IMPEDANCE RATING IN OHMS | 5000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| INCLOSURE TYPE | FULLY INCLOSED |
| OVERALL HEIGHT | 1.938 INCHES MINIMUM AND 2.125 INCHES MAXIMUM |
| MAXIMUM TRANSFORMER POWER RATING | 1.0 WATTS SINGLE COMPONENT |
| MOUNTING FACILITY QUANTITY | 2 SINGLE GROUP |
| MOUNTING METHOD | THREADED STUD SINGLE GROUP |
| NOMINAL THREAD SIZE | 0.138 INCHES SINGLE GROUP |
| NONDEFINITIVE SPEC/STD DATA | TF4RX21AH TYPE |
| PRIMARY TO SECONDARY TURN RATIO | 1 TO 2.06 SINGLE COMPONENT |
| RELIABILITY INDICATOR | NOT ESTABLISHED |
| WINDING FUNCTION AND QUANTITY | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| WINDING SHIELDING METHOD | INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT |
| TERMINAL TYPE AND QUANTITY | 9 WIRE HOOK |
| THREAD SERIES DESIGNATOR | UNC SINGLE GROUP |
| THREAD QUANTITY PER INCH | 32 SINGLE GROUP |