STQ Series
EMI / RFI Filters
Switching Transient General Medical Application Filters
Specifications
| Voltage rating: | 115/250 VAC |
| Line frequency: | 50/60 Hz |
| Leakage current (line to ground): | 2.00 mA maximum at 115 V, 60 Hz 3.00 mA maximum at 250 V, 50 Hz |
| Test Voltage: | Line to ground, 2250 VDC Line to line, 1450 VDC |
Applications
The STQ series is designed to provide increased attenuation down to 10 kHz. This series provides high attenuation for both common and differential mode interference, with little degradation throughout the frequency range, because of the large peak currents drawn by many switching power supplies.
These filters are for applications which must meet the limits of VDE 0871 from 10 kHz to 30 MHz, as well as FCC Part 18 for ISM equipment.
The STQ series meets the leakage requirements of VDE and SEV portable equipment and IEC 2601 (120-volt) nonpatient medical equipment.
Certifications
UL File No. (Pending), CSA File No. (Pending), TUV File No. (Pending).
Electrical Schematics
3 Amp Model
6 Amp Model
How To Define A Part Number
| Series | Case Style | - | Current Rating |
|---|---|---|---|
| STQ | 3 | - | 3 |
Performance
| Current Rating | Model | Frequency, MHz | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Common Mode | 0.01 | 0.02 | 0.05 | 0.15 | 0.5 | 1 | 5 | 10 | 30 | |
| 3A | STQ | 22 | 27 | 37 | 50 | 55 | 55 | 55 | 55 | 55 (db) |
| 6A | STQ | 28 | 32 | 23 | 72 | 80 | 80 | 80 | 65 | 53 (db) |
| Differential Mode | ||||||||||
| 3A | STQ | 1 | 17 | 42 | 65 | 75 | 75 | 65 | 65 | 65 (db) |
| 6A | STQ | 10 | 10 | 48 | 73 | 80 | 80 | 80 | 70 | 75 (db) |
Minimum Insertion loss in 50 ohm system per MIL-STD-220A.
Ordering Information
| Current Rating | Part Number | Dimensions (mm) | ||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| 3A | STQ1-3 | 63.50 | 50.80 | 44.45 | 74.68 | 84.32 |
| STQ3-3 | 63.50 | 50.80 | 44.45 | 74.68 | 84.32 | |
| STQ7-3 | 76.20 | 55.63 | 44.45 | 40.00 | 16.00 | |
| STQ8-3 | 76.20 | 55.63 | 44.45 | 40.00 | 16.00 | |
| 6A | STQ1-6 | 92.21 | 57.15 | 44.45 | 103.20 | 113.54 |
| STQ3-6 | 92.21 | 57.15 | 44.45 | 103.20 | 113.54 | |
| STQ7-6 | 111.76 | 57.15 | 44.45 | 40.00 | 16.00 | |
| STQ8-6 | 111.76 | 57.15 | 44.45 | 40.00 | 16.00 | |
0.250 Tab Terminals extend 14.73mm.
18 AWG wire leads extend 107.95mm (max).
Mounting Hole Diameters are 4.78mm.
Case Styles
Style 1
Style 3
Style 7 / 7M
Style 8 / 8M
Panel Cut-Out
Specifications subject to change.