Description
The 3BHB002000R0001 (cross-referenced to EPCOS / TDK B25835S2205K007) is a 2 µF, 3100 V DC Metallized Polypropylene (MPP) Film Capacitor manufactured by ABB / EPCOS, designed for use as a DC-link smoothing capacitor, snubber capacitor, or AC-filter element in the power sections of ABB ACS600 / ACS800 / ACS850 drives, PST / PSTB soft starters, and medium-voltage inverter stacks. It damps voltage spikes, filters DC-bus ripple, and improves the transient immunity of the inverter bridge by storing and releasing energy between the rectifier and IGBT / thyristor switching stages.
Application Scenarios
Imagine a steel-rolling mill where an ABB ACS800-104 2.2 MW main drive begins logging sporadic “DC Link Overvoltage” and “Capacitor Overtemp” alarms during high-torque acceleration of the roughing stand. Infrared thermography of the drive’s power section reveals one cylindrical capacitor running 25 °C hotter than its neighbors — a classic sign of dielectric degradation after 18 years of continuous duty. Rather than replace the entire drive (requiring crane-out and multi-day outage), the drive technician isolates the DC bus, confirms full discharge, unbolts the failed unit, and installs a verified 3BHB002000R0001 (B25835S2205K007) matching the original 2 µF / 3100 V spec and M12 stud mounting. After re-torquing and a DC-bus pre-charge test, the drive passes self-diagnostics and returns to service — total intervention under 60 minutes with zero disturbance to busbars or I/O wiring. The 3BHB002000R0001 directly solves the legacy-drive spares gap for plants extending the life of proven ABB drive assets, turning a potential drive-change project into a simple component-level repair.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 3BHB002000R0001 (Cross Ref: EPCOS / TDK B25835S2205K007, SICMIT-type MPP capacitor) |
| Manufacturer | ABB (component sourced from / equivalent to EPCOS TDK B25835 series) |
| Product Category | Metallized Polypropylene Film Capacitor — DC-Link / Snubber / AC Filter |
| Rated Capacitance | 2 µF ± 10 % (CN= 2.0 µF) |
| Rated DC Voltage (UR) | 3100 V DC (typical for 1200 V IGBT / 690 V AC drive DC links) |
| Rated AC Voltage (Ur.m.s.) | ≤ 900 V AC (if used in AC filter application — verify per circuit) |
| Dielectric Dissipation Factor tan δ | ≤ 2 × 10-4@ 1 kHz, 23 °C |
| Insulation Resistance (IR) | ≥ 10 000 MΩ × µF (i.e. ≥ 20 000 MΩ for 2 µF part) @ 100 V DC, 1 min |
| Self-Healing Property | Yes — metallized film self-clears on localized dielectric breakdown |
| Terminals / Mounting | M12 threaded stud (bottom / dual-stud depending on can style) + M6/M8 mounting stud to chassis |
| Can / Case Style | Round cylindrical aluminum case, resin-encapsulated, PVC outer sleeve (typical B25835 “round can” style) |
| Operating Temp. Range | -40 °C to +85 °C (derating above +70 °C per IEC 61071) |
| Climatic Category (IEC) | 40/085/56 (40 °C min, 85 °C max, 56 days damp heat) |
| Dimensions (Approx.) | Ø 45–52 mm × 85–105 mm (H) — exact per B25835S2205K007 drawing |
| Weight (Approx.) | 0.35–0.55 kg |
| Protection Class | IP00 (capacitor body); requires enclosed mounting in drive cabinet |
| Standards | IEC 61071 (Capacitors for power electronics), IEC 60252-1, UL 810 (selected variants) |
Technical Principles and Innovative Values
- Innovation Point 1 — Self-Healing Metallized Polypropylene Dielectric: The 3BHB002000R0001 uses heavy-edge-metallized PP film that locally vaporizes on a dielectric puncture, clearing the fault and restoring insulation without catastrophic failure. This “self-healing” property gives long operational life even under occasional voltage transients — a key advantage over foil-film or electrolytic types in drive DC links.
- Innovation Point 2 — Optimized for High dv/dt Snubber & DC-Link Duty: With low equivalent series inductance (ESL) and ESR, the capacitor effectively absorbs IGBT turn-off voltage spikes (dv/dt up to several kV/µs) and smooths DC-bus ripple current — protecting the 2MBI600VX-120-50-class IGBT modules and reducing audible drive-noise. Its 3100 V DC rating provides comfortable margin on 1200 V IGBT bus topologies (typical DC link ≈ 990 V DC at 690 V AC input).
- Innovation Point 3 — Direct Form-Fit M12 Stud Mount Matching Original Drive Layout: The capacitor can uses the same M12 terminal stud and chassis-mounting bolt pattern as the original ABB-specified B25835 / SICMIT part in ACS800 power sections. Technicians remove four nuts, lift the old can, seat the new 3BHB002000R0001, re-tighten to torque spec (typically 5–8 N·m on M12 power stud, 3–5 N·m on mounting bolt), and move on — no bracket fabrication, no adapter leads.
