Product Details: Planar SMT Common Mode Chokes TPER19/25 Series

Engineered for high-noise power systems, the TPER Series delivers industry-leading EMI suppression with 39A rated current and 1500V isolation. Featuring ER19/ER25 planar cores, it achieves ultra-low DCR (down to 1.4mΩ) and precision SRF control (0.95–2.0MHz). Shielded SMT construction minimizes crosstalk, while RoHS/EIA481 compliance ensures automated assembly readiness. Optimized for synergy with EMC filters in electric vehicle chargers and industrial inverters.

Features

Core Platforms

• ER19: 24.9×21.6×16.9mm Max

• ER25: 30.5×27×18mm Max

Electrical @25℃ (Per Document)

Performance

• Operating Temp: –40℃ to +150℃ (TPER25)

• Current Rating: Based on 50℃ temp rise (free air cooling)

• Tape/Reel: EIA481 compliant

*Rated current = RMS current causing 50℃ temperature rise

Applications

Electric Vehicles

• DC-DC converters (39A current support for battery systems)

• On-board chargers (1.42MHz SRF targets CISPR 25 EMI bands)

Industrial Power

• Solar inverters (1500V isolation for 1.2kV bus systems)

• Motor drives (1.4mΩ DCR minimizes power loss)

Data/Telecom

• Server PSUs (2.0MHz SRF suppresses switch-mode noise)

• 5G power modules (Planar profile fits high-density PCBs)

Consumer Electronics

• USB-PD 3.1 adapters (1.42MHz peak impedance for 140W designs)

• LED drivers (RoHS-compliant for global markets)

FAQ

Q: How does planar choke outperform toroidal cores?
A: 30% lower profile (18mm vs 25mm), 50% faster assembly (SMT vs through-hole), and tighter SRF control (±5% vs ±20%).

Q: Can it replace power inductors in DC-DC circuits?
A: No. Designed for EMI suppression (not energy storage). Pair with power inductors for full EMC compliance.

Q: Is thermal derating required at high ambient temps?
A: Yes. Max current = Rated current × [(150 – Ambient Temp)/50]. E.g.: 39A @25℃ → 23.4A @120℃.

Q: Custom impedance curves supported?
A: Yes. Contact for SRF tuning (e.g., 1.0MHz±3% for medical devices).