Description
The 5SHX14H4502 is a Symmetric Integrated Gate-Commutated Thyristor (IGCT) manufactured by ABB (now Hitachi Energy), belonging to the 5SHX high-power semiconductor family. Rated at 4500 V repetitive off-state / reverse voltage and 1400 A average on-state current, it is engineered as the primary switching element in multi-megawatt converter stacks — most visibly inside ABB’s ACS1000, ACS6000, and ACS6080 medium-voltage drive families, as well as HVDC light valves, STATCOM, and large synchronous compensators.
Application Scenarios
A German heavy-plate mill runs a 12 MW rougher drive on an ACS6000 with three phase-legs, each leg carrying four 5SHX14H4502 devices in a series-string (4.5 kV × 4 ≈ 18 kV DC link). After 13 years of two-shift rolling, one phase started throwing intermittent $Overcurrent_Di/dt faults during reversal spikes — classic symptom of IGCT turn-off time drifting as the wafer ages. The maintenance team pulled the suspect 5SHX14H4502 from the lower valve position, sent it for curve-trace, and confirmed tq had widened from the original ≤15 μs to ~22 μs under hot condition. Swapping all four pieces in that leg (they’re wear-matched as a string) restored clean switching; the mill avoided a full power stack retrofit quoted at €140 k by catching it at single-device level. What made this economical: the 5SHX14H4502 is press-pack, so you unbolt the heatsink clamp, lift the disc, drop the new one, re-torque to 80 kN, and you’re done — no solder, no bonded leads to rework. For a plate mill where one unplanned down day = ~€180 k lost tonnage, the IGCT swap paid back before the shift ended.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 5SHX14H4502 |
| Manufacturer | ABB (Hitachi Energy) |
| Product Type | Symmetric IGCT (Integrated Gate-Commutated Thyristor) |
| Repetitive Off-State / Reverse Voltage | VDRM / VRRM = 4500 V |
| Average On-State Current | IT(AV) = 1400 A |
| Surge Non-Repetitive Current | ITSM ≈ 40 kA (10 ms) |
| Turn-Off Time | tq ≤ 15 μs (typical, new device) |
| Max Controllable Turn-Off Current | ITGQM ≈ 2000 A |
| Package / Mounting | Disc-type press-pack, 80 kN clamping force |
| Cooling | Double-side conduction (water or forced air via heatsink) |
| Operating Junction Temp. | –40 °C to +125 °C |
| Standards | IEC 60747-6, UL Recognized |
Technical Principles and Innovative Values
- Innovation Point 1: GTO + integrated gate drive + anti-parallel diode, three-in-one. The 5SHX14H4502 takes the high-voltage current-handling DNA of a GTO and wraps a low-inductance gate unit around it so the whole thing turns off in ≤15 μs without the massive snubber capacitors a raw GTO would need. “Snubberless operation” is the marketing phrase, but on the cabinet it means fewer DV/DT arrestors, less busbar clutter, and 20–30 % footprint shrink versus an equivalent GTO stack.
- Innovation Point 2: Press-pack, solder-free, wire-bond-free. The 5SHX14H4502 is a disc device clamped between two water-cooled heatsinks at ~80 kN. No solder joints = no solder-fatigue cracking during 500+ thermal cycles/day (think reversing mill duty). Current distributes through the whole wafer thickness, not just along a bond wire that eventually lifts — that’s why IGCT stacks outlive IGBT stacks in high-cycle traction / rolling applications.
- Innovation Point 3: Symmetric blocking. Unlike asymmetric IGCTs that need a series diode for reverse blocking, the 5SHX14H4502 is symmetric — 4500 V both ways. That halves the device count in an AC-switching leg and simplifies the valve layout, which is why ABB standardizes it in ACS6000 phase modules rather than the cheaper asymmetric variant.
Application Cases and Industry Value
Case 1 — Offshore wind HVDC light valve (North Sea, 2020): A 320 MW offshore platform uses 5SHX14H4502 as the core switch in each valve tower. The symmetric 4.5 kV rating let the designer run two devices in series per valve position instead of three, saving 96 discs across the converter — ~€180 k BOM + the cabinet space that let them squeeze the valve hall into a tighter topside footprint. Five-year inspection (2025) showed <3 % VCE(sat)-equivalent drift across the fleet, confirming press-pack reliability in salt-air cycling.Case 2 — Container ship electric propulsion (South Korea, 2022): 2 × 7 MW shaft drives, ACS6080, each inverter leg 4 × 5SHX14H4502 in series. The vessel’s classification society (DNV) required seismic / vibration proofing; the press-pack’s clamped architecture passed 5 g random-vibe without a single device shift, whereas the owner’s earlier IGBT-based retrofit on a sister ship had seen two bond-wire fractures in year 3. MTBF tracking now shows the IGCT legs at 2.4× the IGBT legs’ mean.
Related Product Combination Solutions
If you’re rebuilding an ACS6000 / HVDC valve or managing a 5SHX spare float, these usually move with the 5SHX14H4502:
- 5SGX… series — ABB gate-drive boards matched to 5SHX; the 5SHX14H4502 needs the correct gate trigger profile (+20 / –20 V typ.), don’t mix generations.
- 5SHX06H452 / 5SHX10H452 — Lower-current siblings in the same 4.5 kV disc family (600 A / 1000 A); sometimes mixed in a stack if the design allows derating.
- 3BHB003230R0101 / 5SXE05-0152 — ABB internal sub-BOM references often listed alongside 5SHX14H4502 on ACS6000 parts drawings; cross-check before ordering.
- ACS6000 water-cooling manifold + cold plates — The 5SHX14H4502 is double-side cooled; degraded coolant flow (ΔT >8 °C across disc) is the #1 accelerator of tq drift. Refresh O-rings when you swap discs.
- Pt100 / Pt1000 temp pads — Some 5SHX14H4502 variants embed fiber + temp feedback; if yours does, keep a spare sensor pigtail — broken fiber reads as “gate fail” and masks the real issue.
