Product Overview

The ABB 3BHB002000R0001, identified by its component designation B25835S2205K007, is a high-performance metallized polypropylene film snubber capacitor engineered for the most demanding power electronics applications in ABB’s industrial drive and excitation systems. As a critical component within ABB’s UNITROL 6000 series excitation systems and ACS medium-voltage drive platforms, the ABB 3BHB002000R0001 serves a dual function as both a DC-link smoothing capacitor and a snubber element, absorbing the high-energy voltage spikes generated during IGBT and thyristor switching events . The ABB 3BHB002000R0001 is designed to handle the extreme dv/dt conditions common in modern power conversion equipment, with rated parameters of 2 µF capacitance and 3100 V DC, providing robust protection for sensitive power semiconductors.

The ABB 3BHB002000R0001 features a self-healing dielectric construction, allowing the capacitor to recover from localized dielectric breakdowns—a critical reliability feature in applications where a single component failure could trigger a system-wide fault . The ABB 3BHB002000R0001 is housed in a cylindrical aluminum case with M12 stud terminals, ensuring a secure, low-inductance connection and effective heat dissipation. As an OEM-specified part originally manufactured by EPCOS/TDK under the B25835 series, the ABB 3BHB002000R0001 is a direct form-fit replacement for the original capacitor in ABB power sections, making it an essential spare for maintaining legacy and current ABB drive and excitation assets .

 

Technical Specifications

Parameter Name	Value
Product Model	3BHB002000R0001 (ABB) / B25835S2205K007 (EPCOS/TDK)
Manufacturer	ABB (Component: EPCOS / TDK B25835 MKV Series)
Product Type	Snubber / DC-Link Metallized Polypropylene Film Capacitor
Capacitance	2 µF (Nominal) ±10%
Rated DC Voltage	3100 V DC
Dielectric Material	Self-Healing Metallized Polypropylene
Dissipation Factor (tan δ)	≤ 3 × 10⁻⁴ @ 50 Hz
Operating Temperature	-25°C to +85°C (Typical)
Mounting / Terminals	M12 Stud / Threaded Bolt with Faston Connectors
Case Style	Cylindrical Aluminum, Resin-Encapsulated
Approx. Dimensions	Ø 35–52 mm × 60–105 mm (Variant Dependent)
Approx. Weight	0.25 – 1.0 kg
Standards	IEC 61071, EN 61071
Country of Origin	Switzerland / Germany

 

Main Features and Advantages

Self-Healing Metallized Polypropylene Dielectric Technology
The ABB 3BHB002000R0001 employs advanced heavy-edge metallized polypropylene film technology. When a localized dielectric breakdown occurs, the metallization around the fault point vaporizes, clearing the defect and restoring insulation without catastrophic failure . This self-healing property of the ABB 3BHB002000R0001 is a key differentiator from standard electrolytic or foil-film capacitors, providing extended operational life and reliability in continuous-duty applications. Unlike aluminum electrolytic capacitors that degrade over time and fail with leakage, the ABB 3BHB002000R0001 offers stable performance over its service life with predictable end-of-life behavior.

Optimized for High dv/dt Snubber and DC-Link Duty
The ABB 3BHB002000R0001 is specifically designed to absorb the high-energy voltage spikes generated by IGBT and thyristor switching, with the capability to withstand dv/dt rates of several kV/µs . Its low equivalent series inductance (ESL) and low equivalent series resistance (ESR) ensure effective suppression of turn-off overvoltages, protecting the 1200 V IGBT modules and other power semiconductors that are the heart of ABB’s drive systems. The 3100 V DC rating of the ABB 3BHB002000R0001 provides a comfortable operating margin on 1200 V IGBT bus topologies where the typical DC link voltage is approximately 990 V DC for a 690 V AC input system .

Direct Form-Fit Replacement for ABB Drive Power Sections
A critical advantage of the ABB 3BHB002000R0001 is its mechanical compatibility with the original ABB drive design. The capacitor’s M12 terminal stud and chassis-mounting bolt pattern match the original B25835/SICMIT parts used in ABB ACS800, ACS1000, and other medium-voltage drive power sections . This design of the ABB 3BHB002000R0001 allows technicians to remove the failed unit, seat the new capacitor, and retorque the connections—typically requiring less than 60 minutes of intervention time without disturbing busbars or I/O wiring .