Descripción del producto
En TP1515-20mH is a through-hole flat-wire common mode choke for AC and DC input EMI filtering in switched-mode power supplies, inverters, motor drives and industrial controllers. Two identical windings of 0.15 × 1.5 mm flat copper wire (48 turns each) are wound simultaneously on a TP1515 high-permeability core in a vertical 2+2 bobbin, giving a minimum common mode inductance of 20 mH at only 170 mΩ maximum DCR per winding — inside a 22.0 × 20.5 × 15.0 mm envelope on a 13 × 10 mm pin pitch.
Because both windings are wound together in the same pass rather than one after the other, the two halves stay closely coupled and the inductance balance is held to 1:1 ±2%. In practice this means a stable, repeatable common mode impedance from part to part, and a leakage inductance low enough (≈ 94 µH measured) not to disturb differential mode behaviour.
Características principales
- 20 mH minimum common mode inductance per winding, 1 kHz / 0.25 V
- 170 mΩ max DCR per winding — 107–109 mΩ typical in production samples
- Flat-wire winding: high copper fill factor and low DC resistance in a shallow, low-profile footprint
- Simultaneously wound N1/N2: tight coupling, 1:1 ±2% inductance balance, repeatable CM impedance
- 1.5 kV AC winding-to-winding and 1.0 kV AC winding-to-core dielectric strength
- Varnish impregnated, fixed windings, lead-free (Sn99.9) soldering process
- UL-recognized materials: 180 °C UEW/FIW magnet wire, V-0 bobbin rated 150 °C
- Vertical 2+2 bobbin, 13 × 10 mm pin pitch, PCB hole ≥ Ø1.2 mm — a direct drop-in for common toroidal and UU/UT footprints
Electrical Specification
| Parámetro | Value | Test condition |
|---|---|---|
| Inductance (N1: pin 1–4, N2: pin 2–3) | 20 mH min | 1 kHz, 0.25 V, 25 °C |
| Inductance balance N1 : N2 | 1 : 1 ±2 % | 1 kHz, 0.25 V |
| DC resistance, each winding | 170 mΩ max | 25 °C, source impedance 100 Ω |
| Corriente nominal | 1.8 – 2.0 A | Per TP Series selection table |
| Dielectric strength, winding to winding | 1.5 kV AC, no breakdown | 5 mA, 3 s |
| Dielectric strength, winding to core | 1.0 kV AC, no breakdown | 5 mA, 3 s |
| Leakage inductance (N2 shorted) | ≈ 94 µH typical | 1 kHz, 0.25 V — measured on production samples |
Winding Data
| Winding | Pins | Wire | Turns |
|---|---|---|---|
| N1 | 1 – 4 | 0.15 × 1.5 mm flat wire, UEW/FIW 180 °C | 48 Ts (ref.) |
| N2 | 2 – 3 | 0.15 × 1.5 mm flat wire, UEW/FIW 180 °C | 48 Ts (ref.) |
N1 and N2 are wound simultaneously in the same direction. Turn count is a reference — the finished part is specified and tested on inductance; the two windings must always have an equal number of turns.
Mechanical Data
| Item | Value |
|---|---|
| Body (L × W × H) | 22.0 × 20.5 × 15.0 mm max |
| Pin pitch (horizontal × vertical) | 13 ± 0.5 × 10 ± 0.5 mm |
| Pin diameter / length | Ø 0.8 ± 0.1 mm / 3.5 ± 0.5 mm |
| Recommended PCB hole | ≥ Ø 1.2 mm |
| Bobbin / core | TP1515 vertical 2+2 bobbin / TP1515 high-permeability core (R12K or equivalent) |
| Mounting | Vertical through-hole, 4 pins |
Aplicaciones típicas
- AC input EMI filtering of 60 – 120 W class switch-mode power supplies and adapters
- DC input filtering of DC/DC converters and distributed power architectures
- Frequency inverters, motor drives and servo systems
- Chargers, UPS and energy storage equipment
- Industrial controllers, automation and measurement equipment
The TP1515 footprint is a practical replacement for T20×10×10, T18×10×8, T16×10×8 toroids and UU10.5 / UT20 / EE15 cores, with a lower profile and a much shorter assembly time.
Part Number and Options
The TP1515 family is available in a range of inductances and wire gauges on the same 13 × 10 mm footprint, so a design can be re-tuned for attenuation or for copper loss without a PCB change. Refer to the TP Series CM Choke Selection Table in the Download section for all variants, impedance at 100 kHz and reference power ratings.
Need a different inductance, a higher current rating, a different pin pitch or an encapsulated version? Tell us your target attenuation and current profile and we will design it — sales@trafopsu.com
