ABB medium-voltage accessory references include releases, operating and indication components, interlocks and connection parts for specified breakers, contactors and switchgear. The existing table covers several distinct host products and versions. Use the Material No. and complete host-equipment details to identify a part; a shared voltage or family name alone does not establish fit.

Medium Voltage Accessories

Key Features

Existing product and version coverage

The list retains references for VD4/P (HE), VD4 PT (IEC), VD4 CL EP, HD4 40.5 kV, ConVac, EK6 earthing switches and general medium-voltage parts. These application labels identify the existing reference scope; they do not establish universal compatibility between products or regions.

Electrical and mechanical functions

Opening and closing releases perform different operating functions. Auxiliary contacts provide indication or control signals; locking devices, truck parts and plugs are tied to the mechanism and switchgear arrangement. Confirm the actual component, mounting and wiring rather than selecting solely from a descriptive name.

  • Provide the host product’s full type, serial number, manufacture/nameplate information and installation form.
  • For an electrical release or motor, specify control voltage, AC/DC, frequency and duty according to the actual component marking and applicable manual.
  • For auxiliary contacts, identify required functions, contact arrangement and wiring/terminal references.
  • For truck, locking, plug or mechanical parts, include switchgear/cubicle information, interface dimensions and photographs.
  • Quote the original Material No. and complete accessory description. Current ordering details must be checked against the correct equipment version.
  • Check factory-installed versus field-installable arrangements and the applicable ABB installation/service instructions before planning work.

Documentation boundaries

ABB’s VD4 PT manual requests breaker serial information and the rated voltage of electrical spare parts when identifying spares. That identification principle is useful here, but the VD4 PT document is not evidence that a part fits HD4, ConVac, EK6 or another VD4 version. Use the corresponding host-product documentation.

All historical references and Material Numbers remain unchanged. Where original reference parameters differ from current ABB documents, compare both explicitly and select using the current applicable technical information; no version change, replacement or compatibility is inferred.

Information for quotation

Send the full accessory description and Material No., quantity and destination country. Include host model/serial and nameplate photos, coil or control-voltage details, installation form and cabinet/interface information. Product status and current availability should be confirmed before ordering.

Browse Medium Voltage Products, VD4 breakers, HD4 breakers or Contact. Official reference: ABB VD4 PT IEC product manual. The retained VD4 catalogue below has its own product coverage.

Popular Models

  • Closing Coil
  • Opening Coil
  • Auxiliary Switch
  • Truck Locking Electromagnet
  • Secondary Plug & Socket
  • VD4 Earthing Contact Kit
  • Truck Operating Handle
  • EK6 Earthing Switch
  •  
AccessoryMaterial No.Applicable Product
Opening release 220-250V DC/AC [-MBO1]51001992VD4/P (HE)
Opening release 110-132V DC/AC [-MBO1]51001991VD4/P (HE)
Opening release 220V DC [-MBO1]51002031VD4/P (HE)
Opening release 220V AC [-MBO1]51002032VD4/P (HE)
Opening release 110V DC [-MBO1]51002029VD4/P (HE)
Opening release 110V AC [-MBO1]51002030VD4/P (HE)
Second opening release 110-132V DC/AC [-MBO2]51001993VD4/P (HE)
Second opening release 220-250V DC/AC [-MBO2]51001994VD4/P (HE)
Instantaneous opening release 110V AC 50/60Hz [-MBO1 INST.]51024834VD4/P (HE)
Instantaneous opening release 110V DC [-MBO1 INST.]51024831VD4/P (HE)
Instantaneous opening release 125/127V DC [-MBO1 INST.]51024832VD4/P (HE)
Instantaneous opening release 220/240V AC 50/60Hz [-MBO1 INST.]51024835VD4/P (HE)
Instantaneous opening release 220V DC [-MBO1 INST.]51024833VD4/P (HE)
Second instantaneous opening release 110V AC 50/60Hz [-MBO2 INST.]51026423VD4/P (HE)
Second instantaneous opening release 110V DC [-MBO2 INST.]51026424VD4/P (HE)
Second instantaneous opening release 125/127V DC [-MBO2 INST.]51026425VD4/P (HE)
Second instantaneous opening release 220/240V AC 50/60Hz [-MBO2 INST.]51026426VD4/P (HE)
Second instantaneous opening release 220V DC [-MBO2 INST.]51026427VD4/P (HE)
Closing release 110-132V DC/AC [-MBC]51001995VD4/P (HE)
Closing release 220-250V DC/AC [-MBC]51001996VD4/P (HE)
Spring charging motor 110-130V DC/AC 200W [-MAS]51001979VD4/P (HE)
Spring charging motor 220-250V DC/AC 200W [-MAS]51001980VD4/P (HE)
Undervoltage release 110-132V DC/AC [-MBU]51001999VD4/P (HE)
Undervoltage release 220-250V DC/AC [-MBU]51002000VD4/P (HE)
Undervoltage time-delay device 220-250V DC/AC [-KT]51002002VD4/P (HE)
Undervoltage time-delay device 110-127V DC/AC [-KT]51002001VD4/P (HE)
Overcurrent release [-MBO3]51026428VD4/P (HE)
Intermediate current transformer for indirect overcurrent release 5A51001971VD4/P (HE)
Closing lock electromagnet 110-132V DC/AC [-RLE1]51002003VD4/P (HE)
Closing lock electromagnet 220-250V DC/AC [-RLE1]51002004VD4/P (HE)
Opening release 220-250V DC/AC 50/60Hz [-MBO1]51025637VD4 PT (IEC)
Opening release 110-132V DC/AC 50/60Hz [-MBO1]51026379VD4 PT (IEC)
Opening release 60V DC/AC 50/60Hz [-MBO1]51026380VD4 PT (IEC)
Opening release 48V DC/AC 50/60Hz [-MBO1]51026381VD4 PT (IEC)
Opening release 30V DC [-MBO1]51026382VD4 PT (IEC)
Opening release 24V DC [-MBO1]51026383VD4 PT (IEC)
Second opening release 220-250V DC/AC 50/60Hz [-MBO2]51026384VD4 PT (IEC)
Second opening release 110-132V DC/AC 50/60Hz [-MBO2]51026385VD4 PT (IEC)
Second opening release 60V DC/AC 50/60Hz [-MBO2]51026386VD4 PT (IEC)
Second opening release 48V DC/AC 50/60Hz [-MBO2]51026387VD4 PT (IEC)
Second opening release 30V DC [-MBO2]51026388VD4 PT (IEC)
Second opening release 24V DC [-MBO2]51026389VD4 PT (IEC)
Instantaneous opening release 220/240V AC 50/60Hz [-MBO1 INST.]51024835VD4 PT (IEC)
Instantaneous opening release 220V DC [-MBO1 INST.]51024833VD4 PT (IEC)
Instantaneous opening release 125/127V DC [-MBO1 INST.]51024832VD4 PT (IEC)
Instantaneous opening release 110V DC [-MBO1 INST.]51024831VD4 PT (IEC)
Instantaneous opening release 110V AC 50/60Hz [-MBO1 INST.]51024834VD4 PT (IEC)
Instantaneous opening release 48V DC [-MBO1 INST.]51024830VD4 PT (IEC)
Instantaneous opening release 24V DC [-MBO1 INST.]51024829VD4 PT (IEC)
Second instantaneous opening release 220/240V AC 50/60Hz [-MBO2 INST.]51026390VD4 PT (IEC)
Second instantaneous opening release 220V DC [-MBO2 INST.]51026391VD4 PT (IEC)
Second instantaneous opening release 125/127V DC [-MBO2 INST.]51026392VD4 PT (IEC)
Second instantaneous opening release 110V DC [-MBO2 INST.]51026393VD4 PT (IEC)
Second instantaneous opening release 110V AC 50/60Hz [-MBO2 INST.]51026394VD4 PT (IEC)
Second instantaneous opening release 48V DC [-MBO2 INST.]51026395VD4 PT (IEC)
Second instantaneous opening release 24V DC [-MBO2 INST.]51026396VD4 PT (IEC)
Closing release 220-250V DC/AC 50/60Hz [-MBC]51018422VD4 PT (IEC)
Closing release 110-132V DC/AC 50/60Hz [-MBC]51023399VD4 PT (IEC)
Closing release 60V DC/AC 50/60Hz [-MBC]51026397VD4 PT (IEC)
Closing release 48V DC/AC 50/60Hz [-MBC]51026398VD4 PT (IEC)
Closing release 30V DC [-MBC]51026399VD4 PT (IEC)
Closing release 24V DC [-MBC]51026400VD4 PT (IEC)
Spring charging motor 220-250V DC/AC 50/60Hz [-MAS]51002018VD4 PT (IEC)
Spring charging motor 100-130V DC/AC 50/60Hz [-MAS]51023401VD4 PT (IEC)
Spring charging motor 48-60V DC [-MAS]51026401VD4 PT (IEC)
Spring charging motor 24-30V DC [-MAS]51026402VD4 PT (IEC)
Closing lock electromagnet 220-250V DC/AC 50/60Hz [-RLE1]51026403VD4 PT (IEC)
Closing lock electromagnet 110-132V DC/AC 50/60Hz [-RLE1]51026404VD4 PT (IEC)
Closing lock electromagnet 48V DC/AC 50/60Hz [-RLE1]51026405VD4 PT (IEC)
Closing lock electromagnet 60V DC/AC 50/60Hz [-RLE1]51026406VD4 PT (IEC)
Closing lock electromagnet 30V DC [-RLE1]51026407VD4 PT (IEC)
Closing lock electromagnet 24V DC [-RLE1]51026408VD4 PT (IEC)
Undervoltage release coil assy 220-250V DC [-MBU]51025762VD4 PT (IEC)
Undervoltage release coil assy 110-132V DC [-MBU]51025763VD4 PT (IEC)
Undervoltage release 60V DC/AC 50/60Hz [-MBU]51026409VD4 PT (IEC)
Undervoltage release 48V DC/AC 50/60Hz [-MBU]51026410VD4 PT (IEC)
Undervoltage release 30V DC [-MBU]51026411VD4 PT (IEC)
Undervoltage release 24V DC [-MBU]51026412VD4 PT (IEC)
Undervoltage time-delay device 220-250V DC/AC [-KT]51002022VD4 PT (IEC)
Undervoltage time-delay device 110-127V DC/AC [-KT]51002021VD4 PT (IEC)
Undervoltage time-delay device 60V DC/AC [-KT]51026413VD4 PT (IEC)
Undervoltage time-delay device 48V DC/AC [-KT]51026414VD4 PT (IEC)
Undervoltage time-delay device 24-30V DC [-KT]51026415VD4 PT (IEC)
Overcurrent release [-MBO3]51026416VD4 PT (IEC)
Intermediate current transformer for indirect overcurrent release 5A51001971VD4 PT (IEC)
Spring charged/discharged signal switch -BGS251002025VD4 PT (IEC)
Opening release 220-240V DC/AC [Y2]51001965VD4 CL EP
Opening release 110-125V DC/AC [Y2]51001964VD4 CL EP
Opening release 60V DC [Y2]51026350VD4 CL EP
Opening release 48V DC [Y2]51026351VD4 CL EP
Opening release 30V DC [Y2]51026352VD4 CL EP
Opening release 24V DC [Y2]51026353VD4 CL EP
Closing release 220-240V DC/AC [Y3]51001963VD4 CL EP
Closing release 110-125V DC/AC [Y3]51001962VD4 CL EP
Closing release 60V DC [Y3]51026354VD4 CL EP
Closing release 48V DC [Y3]51026355VD4 CL EP
Closing release 30V DC [Y3]51026356VD4 CL EP
Closing release 24V DC [Y3]51026357VD4 CL EP
Closing lock electromagnet 240V DC/AC [Y1]51026358VD4 CL EP
Closing lock electromagnet 220V DC/AC [Y1]51001961VD4 CL EP
Closing lock electromagnet 125V DC [Y1]51026359VD4 CL EP
Closing lock electromagnet 110V DC/AC [Y1]51001960VD4 CL EP
Closing lock electromagnet 60V DC [Y1]51026360VD4 CL EP
Closing lock electromagnet 48V DC [Y1]51026361VD4 CL EP
Closing lock electromagnet 30V DC [Y1]51026362VD4 CL EP
Closing lock electromagnet 24V DC [Y1]51026363VD4 CL EP
Anti-pumping relay 60-240V DC [K0]51001954VD4 CL EP
Anti-pumping relay 24-60V DC [K0]51001953VD4 CL EP
Spring charging motor 220/240V DC/AC [M0]51001956VD4 CL EP
Spring charging motor 110V DC/AC [M0]51001955VD4 CL EP
Second opening release 220-240V AC/DC [Y9]51001969VD4 CL EP
Second opening release 110-125V AC/DC [Y9]51001968VD4 CL EP
Second opening release 60V DC [Y9]51026364VD4 CL EP
Second opening release 48V DC [Y9]51026365VD4 CL EP
Second opening release 30V DC [Y9]51026366VD4 CL EP
Second opening release 24V DC [Y9]51026367VD4 CL EP
Undervoltage release 220V DC/AC [Y4]51001967VD4 CL EP
Undervoltage release 125V DC/AC [Y4]51026368VD4 CL EP
Undervoltage release 110V DC/AC [Y4]51001966VD4 CL EP
Undervoltage release 60V DC [Y4]51026369VD4 CL EP
Undervoltage release 48V DC [Y4]51026370VD4 CL EP
Undervoltage release 30V DC [Y4]51026371VD4 CL EP
Undervoltage release 24V DC [Y4]51026372VD4 CL EP
Indirect overcurrent release 5A [Y7]51001970VD4 CL EP
Intermediate current transformer 5A51001971VD4 CL EP
Closing lock electromagnet auxiliary switch [S2]51026373VD4 CL EP
Auxiliary switch 5NO [S5]51026374VD4 CL EP
Auxiliary switch 5NC [S5]51026375VD4 CL EP
Auxiliary switch 4NO+1NC [S5]51026376VD4 CL EP
Auxiliary switch 3NO+2NC [S3]/[S5]51001957VD4 CL EP
Auxiliary switch 2NO+3NC [S1]/[S4]/[S5]51001958VD4 CL EP
Auxiliary switch 1NO+4NC [S5]51026377VD4 CL EP
Electrical opening signal auxiliary switch [S7]51001959VD4 CL EP
Manual spring charging lever51001972VD4 CL EP
Opening release 220-240V AC/DC [-YO]51002088HD4 40.5 kV
Opening release 110-132V DC [-YO]51002089HD4 40.5 kV
Closing release 220V AC/DC [-YC]51002087HD4 40.5 kV
Closing release 110V AC/DC [-YC]51002090HD4 40.5 kV
Closing lock electromagnet 220-240V AC/220V DC [-RL1]51002094HD4 40.5 kV
Closing lock electromagnet 110V AC-DC [-RL1]51002093HD4 40.5 kV
Spring charging motor 220-250V AC/DC [-MS]51004618HD4 40.5 kV
Spring charging motor 110-132V AC/DC [-MS]51004617HD4 40.5 kV
Undervoltage release 220-240V AC51002096HD4 40.5 kV
Undervoltage release 110-132V DC51002095HD4 40.5 kV
Undervoltage release 110-127V AC51026378HD4 40.5 kV
Manual spring charging lever51002098HD4 40.5 kV
LHMI display51002428HD4 40.5 kV
LHMI power adapter DR 110-220V AC/DC51002429HD4 40.5 kV
Fuse shorting copper bar (single phase)51002109ConVac
Fuse adapter assembly, 192mm51002113ConVac
Fuse adapter assembly, 292mm51002112ConVac
Fuse replacement tool51002121ConVac
Fuse adapter, 292mm single phase51002114ConVac
Fuse adapter, 192mm single phase51002115ConVac
Fuse adapter retaining ring51002116ConVac
Power module 110-125V DC/AC 50-60Hz51025158ConVac
Power module 220-240V DC/AC 50-60Hz51025159ConVac
Power module with counter 110-125V DC/AC 50-60Hz51025160ConVac
Power module with counter 220-240V DC/AC 50-60Hz51025161ConVac
6NO+6NC auxiliary contacts51025162ConVac
Mechanical latching device 24V DC51025163ConVac
Mechanical latching device 48V DC51025164ConVac
Mechanical latching device 110-125V AC/DC 50-60Hz51025165ConVac
Mechanical latching device 220-240V AC/DC 50-60Hz51025166ConVac
Counter 110V DC/AC51025167ConVac
Counter 220V DC/AC51025168ConVac
Fuse adapter 367mm (three phase)51025174ConVac
Fuse cover 7.2kV51025176ConVac
Fuse cover 12kV51025177ConVac
VT lifting device51025178ConVac
Emergency opening handle51025181ConVac
Primary VT fuse51025182ConVac
Secondary VT fuse51025183ConVac
Emergency opening device51025185ConVac
Counter & mechanical latch aviation plug51025186ConVac
Maintenance truck P=275 H=31051002070General MV / VD4 / HD4 / ConVac
Maintenance truck P=210 H=205/27551002069General MV / VD4 / HD4 / ConVac
Maintenance truck P=150 H=20551002068General MV / VD4 / HD4 / ConVac
Lower secondary outlet sleeve51002054General MV / VD4 / HD4 / ConVac
Upper secondary outlet sleeve51002055General MV / VD4 / HD4 / ConVac
12kV VD4 rail earthing kit ≤31.5kA51026435General MV / VD4 / HD4 / ConVac
12kV VD4 rail earthing kit ≥40kA51004054General MV / VD4 / HD4 / ConVac
24kV VD4 rail earthing kit51004052General MV / VD4 / HD4 / ConVac
12-24kV truck operating handle51002048General MV / VD4 / HD4 / ConVac
40.5kV VD4 & HD4 truck operating handle51002049General MV / VD4 / HD4 / ConVac
40.5kV VD4/HD4 three-wing key51002097General MV / VD4 / HD4 / ConVac
Cross-flow fan kit 40.5kV51026434General MV / VD4 / HD4 / ConVac
Cross-flow fan kit 12-24kV51023873General MV / VD4 / HD4 / ConVac
Cross-flow fan with 1000mm panel51023874General MV / VD4 / HD4 / ConVac
Axial fan51025806General MV / VD4 / HD4 / ConVac
Axial fan with mounting plate51025807General MV / VD4 / HD4 / ConVac
64-pin aviation socket51002816General MV / VD4 / HD4 / ConVac
64-pin aviation plug51002817General MV / VD4 / HD4 / ConVac
58-pin aviation socket body51002052General MV / VD4 / HD4 / ConVac
58-pin aviation socket51002051General MV / VD4 / HD4 / ConVac
58-pin aviation plug51002050General MV / VD4 / HD4 / ConVac
Aviation socket pins Φ1.5mm ×5051002057General MV / VD4 / HD4 / ConVac
Aviation socket cover51002053General MV / VD4 / HD4 / ConVac
Truck position auxiliary contacts [S8][S9][-BGT1][-BGT2]51002062General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 240V DC/AC [Y0][-RLE2]51026433General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 220V DC/AC [Y0][-RLE2]51002064General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 125-132V DC/AC [Y0][-RLE2]51024256General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 110V DC/AC [Y0][-RLE2]51002063General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 60V DC [Y0][-RLE2]51026429General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 48V DC [Y0][-RLE2]51026430General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 30V DC [Y0][-RLE2]51026431General MV / VD4 / HD4 / ConVac
Truck locking electromagnet 24V DC [Y0][-RLE2]51026432General MV / VD4 / HD4 / ConVac
Spiral tube 28×36 1m51002056General MV / VD4 / HD4 / ConVac
MDC2 motorized truck digital control unit 110V AC/DC 12-24kV51002633General MV / VD4 / HD4 / ConVac
MDC2 motorized truck digital control unit 220V AC/DC 12-24kV51002634General MV / VD4 / HD4 / ConVac
MDC2 motorized truck digital control unit 110V DC 40.5kV51031832General MV / VD4 / HD4 / ConVac
MDC2 motorized truck digital control unit 110V DC 40.5kV51031833General MV / VD4 / HD4 / ConVac
12kV EK6 P=275 Ith=31.5kA with fixed contacts51002074EK6 Earthing Switch
12kV EK6 P=210 Ith=31.5kA with fixed contacts51002073EK6 Earthing Switch
12kV EK6 P=150 Ith=31.5kA with fixed contacts51002072EK6 Earthing Switch
12kV EK6 P=275 Ith=40kA with fixed contacts51002076EK6 Earthing Switch
12kV EK6 P=210 Ith=40kA with fixed contacts51002075EK6 Earthing Switch
12kV EK6 P=210 Ith=31.5kA left shaft51002078EK6 Earthing Switch
12kV EK6 P=150 Ith=31.5kA left shaft51002077EK6 Earthing Switch
12kV EK6 P=210 Ith=40kA left shaft51002079EK6 Earthing Switch
12kV EK6 P=275 Ith=40kA left shaft51002080EK6 Earthing Switch
12kV EK6 operating handle51002081EK6 Earthing Switch
40.5kV EK6 P=280 Ith=31.5kA with fixed contacts51002100EK6 Earthing Switch
40.5kV EK6 operating bevel gear51002102EK6 Earthing Switch
40.5kV EK6 fixed-contact insulating cover51002103EK6 Earthing Switch
40.5kV EK6 operating shaft51002101EK6 Earthing Switch

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