The EPCOS B84112A0032R158 is a high-performance DC line EMI/EMC filter designed for suppression of electromagnetic interference in industrial and photovoltaic applications. Based on EPCOS (TDK) technology, the module integrates a high-efficiency toroidal common-mode choke and X-class capacitors to filter high-frequency noise generated by switching converters.

Optimized for use on DC bus lines of photovoltaic inverters, this filter reduces conducted noise in both common mode and differential mode, helping ensure EMC compliance and improving overall system stability.

⚙️ Main Features

• Model: B84112A0032R158
• Type: EMI/EMC filter for DC lines
• Rated current: 32 A
• Rated voltage: up to 800 V DC
• Topology: Combined filter (common mode + differential mode)

Inductance:

• High-permeability toroidal choke

Capacitors:

• MKP 1 µF (differential filtering)
• 2 × 22 nF (high-frequency suppression)
• Operating temperature: up to approx. 65°C (TR = 65°C)
• Connections: Screw terminals for high current
• Mounting: PCB mounting with reinforced mechanical fixing

🔌 Typical Applications

• Photovoltaic inverters (string and central inverters)
• Industrial DC/DC and DC/AC converters
• Energy storage systems (battery systems)
• Power electronics and motor drives

⚡ Function

• Reduction of conducted EMI interference
• Filtering of high-frequency switching noise
• Protection of DC lines and downstream devices
• Improvement of electromagnetic compatibility (EMC)

🧩 Technical Notes

This filter is designed for high-voltage DC applications and is not suitable for standard AC mains use (e.g. household Schuko systems). Intended exclusively for industrial and photovoltaic applications.