Find the family.
Then the exact fit.

1–100 MVA; AC 15/25/50 kV or DC 750/1,500/3,000 V; fixed/mobile and regenerative variants

0.5–20 MW; 600–3,000 Vdc output; 6/12/24-pulse diode/thyristor; air/water cooled

750/1,500/3,000 Vdc and 15/25/50 kVac; 1,000–8,000 A; indoor/outdoor and arc-resistant

750 Vdc through 25/50 kVac; simple/compound/autotransformer feeding; urban to high-speed

600–1,500 Vdc common; bottom/top/side contact; aluminium/stainless composite conductor rail

300/500 V control through 25/50 kV traction; fire-smoke-toxicity, oil and vibration resistant

100 kW–10+ MW per vehicle/station; 600–3,000 Vdc or 15/25 kVac input; IGBT/SiC

0–20 MVA; LV <1 kVac/<1.5 kVdc or HV 6.6/11 kV; 50/60 Hz and frequency conversion

440/690 V through 3.3/6.6/11 kV; 400–10,000 A; class-approved main/emergency boards

10 kWh–100+ MWh; propulsion, hotel load and hybrid; LFP/NMC; rack/container/room

100 kW–100 MW+; 400 V–15 kV; induction/synchronous/PM; podded/inboard

100 kW–100 MW+; 440/690 V or 3.3–13.8 kV; regenerative and multi-pulse/AFE

1 kV inter-array/control through 525 kV export; dynamic/static, armoured, wet design and fibre

1–500 MVA; 6.6–400 kV; platform/nacelle/subsea; compact, low-fire-load and ester variants

500 W–4 kW hot-swap modules common; -48/54 Vdc, 110/220 Vdc variants; shelves to hundreds kW

1 kW–1 MW+; -48 Vdc standard, 110/220 Vdc special; rectifiers, batteries and distribution

1–500 kWh per site/rack common; 12/24/48 V strings; VRLA, lithium and Ni-Cd

5–500 kVA; silent/weatherproof, auto-start and hybrid DC variants

0.5–500 kVA; AC UPS and -48 Vdc systems; rack/tower/modular

6U–52U or custom; -48 Vdc and AC distribution; IP55–IP66, cooling and battery compartments