What It Is & Where It Goes
The 3RT1026-1AB00-ZW98: A SIRIUS S0-frame power contactor with three normally-open main poles, rated for motor switching in control panels. The 24 VAC 50 Hz coil pulls in at 0.8–1.1× rated voltage, so it holds reliably on a nominal 24 V supply.
At 400 V AC-2 (slip-ring motor starting), it handles 11 kW — that's the duty cycle for moderate inrush, typical for conveyors or pumps. At 400 V AC-4 (plugging/reversing), the rated operational current is 15.5 A, which governs the contactor's life under frequent jogging or reversing loads. The AC-1 resistive rating isn't stated here, but the AC-12 maximum operating current of 10 A gives a ceiling for control-circuit switching.
Panel Fit & Wiring
Footprint is 45 mm wide by 85 mm tall by 91 mm deep — S0 frame, so it occupies three 18 mm module spaces on the DIN rail. Main circuit terminals accept solid conductors: 2×(0.5–1.5 mm²), 2×(0.75–2.5 mm²), max 2×(0.75–4 mm²); stranded: 2×(1–2.5 mm²), 2×(2.5–6 mm²), max 2×10 mm². AWG equivalents: 2×(16–12), 2×(14–10), 1×8. Strip length for screw terminals is standard — no special tooling. IP20 on the front, IP00 at the terminals — the terminal area is live, so finger-safe shrouding or a cover is expected in the panel layout.
Environmental & Auxiliary Ratings
Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 0.3 A at 220 V DC (–) — the DC switching capacity drops sharply with voltage, so verify the auxiliary load curve if switching DC solenoids or indicator lamps.