PE-51686NL Current Transformer for Power Supplies & Industrial Control Systems

PE-51686NL Current Transformer | 20A 50:1 Turns Ratio for Switching Power Supplies & Industrial Control

The PE-51686NL is a high-accuracy current transformer designed for switching power supplies, industrial automation, and energy-monitoring systems. With a 20A rated current and a 50:1 turns ratio, it delivers precise current measurement across a 20kHz-200kHz frequency range — exactly the band where modern SMPS feedback loops need clean current data.

The 5mH inductance and low 700mΩ secondary DCR ensure minimal power loss in the sensing path, while the compact through-hole package (17.01 × 9.90 × 20.32mm) drops cleanly into PCB-based power electronics. PC-pin termination handles the vibration that comes with industrial deployment.

5mH Inductance with Wide-Frequency Response for Reliable Current Monitoring

• Wide frequency response — 20kHz to 200kHz, ideal for SMPS, inverters, and motor drives.
• Low-impedance secondary — 700mΩ DCR reduces measurement errors.
• Robust construction — PC-pin termination withstands high-vibration environments.
• Industry-standard dimensions — compatible with DIP / SMD layouts in PCB-based power designs.
• Operating temperature -40°C to +85°C — covers most industrial deployment envelopes.

Where the PE-51686NL Fits

This is the workhorse current-sense transformer for primary-side current measurement in switching power supplies — the part that closes the inner control loop and keeps output regulated under fast load changes. The same magnetic profile shows up in motor-drive controllers, solar inverters, and energy-meter hardware where AC current needs to be measured at the kHz frequencies typical of switching converters. The 50:1 turns ratio scales 20A primary current down to 0.4A secondary, easy for downstream sensing resistors and amplifiers.

PE-51686NL Technical Specifications

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Need PE-51686NL in tray quantities for SMPS / inverter production runs? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.