B43586-S3468-Q3 DC Capacitor: Complete Technical Guide for Industrial Automation Applications
On this page
What is the EPCOS B43586-S3468-Q3?
The B43586-S3468-Q3 is an EPCOS screw-terminal aluminium electrolytic capacitor rated 4600 µF at 385 V — the large DC-link can that sits in a variable-frequency drive or UPS to hold the bus voltage steady. It carries two M5 stud terminals on top (the Q3 terminal style, with the polarity band and the pressure vent beside them), a threaded mounting stud through the base, and EPCOS's 25/085/56 climatic marking; batch 08.23S dates this lot to August 2023. The record covers 15 capacitors, new in EPCOS cartons with foam-divider packing. All 12 photos and 1 video below show these exact units.
Part details
| Field | Value |
|---|---|
| Model | EPCOS B43586-S3468-Q3 |
| Type | Screw-terminal aluminium electrolytic capacitor (DC-link class) |
| Capacitance | 4600 µF (Q tolerance code) |
| Rated voltage | 385 V DC |
| Marking code | 25/085/56 (EPCOS climatic/life code), LL lot mark |
| Terminals | 2x M5 stud terminals on top, +/− banded on the sleeve |
| Mounting | Threaded stud through the base |
| Vent | Pressure vent plug beside the terminals |
| Batch | 08.23S (August 2023), barcode 644106011947/EPX per unit |
| Quantity | 15 units, new in EPCOS cartons, foam cell dividers |
| Shipping weight | 1 kg as recorded |
All values are read from the sleeve print, the terminal-face photograph and the carton labels in the photo set.
What a DC-link capacitor actually does
Between the rectifier and the inverter of a drive sits the DC bus, and this can is the bus. The rectifier output pulses at line frequency; the capacitor charges on each pulse and discharges between them, so the inverter sees DC instead of ripple. Every amp of motor current flows through this part, which is why the B43586 family is built the way it is — a large can with high ripple-current capability, stud terminals that take ring lugs under a nut, a base stud that clamps the can to the chassis so vibration cannot work the terminals loose, and a vent that opens safely if the electrolyte ever overheats. When a drive starts throwing bus-voltage faults or the can top domes, this is the part being replaced, and matching the exact ordering code matters: capacitance, voltage and terminal style all change the fit. At 4600 µF and 385 V, this unit serves mid-size drive and UPS bus sections. KOEED's EPCOS shelf holds sibling sizes, for example the B43456-S5129-M1 at 450 V / 12000 µF.
Photos and video
All images below are original KOEED warehouse photos. Click any photo to view it full size.
Sourcing help
KOEED supplies this product, in active and EOL stock. Send the part number for a quote.
Need a quote for this part?
Send us the part number or article link — we will confirm price, availability and lead time.
