Technical Specifications

Main Features and Advantages

Universal 24–240 V AC/DC supply eliminates SKU sprawl.​ The headline advantage of ABB 1SAR330020R0000​ is its auto-sensing wide-range front end: 24 V DC panel bus, 48 V DC telecom-derived control, 120 V AC North-American MCC, 230 V AC European starter—same relay, no jumpers, no dip-switch voltage select. For EPC firms and system integrators running multi-region projects (e.g., a German OEM skid shipping to a US plant with 120 V control and a Middle-East site with 230 V), one ABB 1SAR330020R0000​ spare covers all three. Storeroom managers particularly value this—ABB’s older CT-A (ON-delay only, single-voltage) and CT-E (OFF-delay only) families spawned AC/DC-split SKUs that doubled inventory; the CT-MFD in ABB 1SAR330020R0000​ collapses that matrix.

Eight timing modes in a 22.5 mm shell.​ Where a single-function timer forces you to pick “ON-delay or OFF-delay” at procurement time, ABB 1SAR330020R0000​ carries all eight on the front rotary switch. Star-delta motor starting is the classic case: traditional schemes need two timers (main ON-delay for delta-switch, plus a second for star-contactor overlap), whereas ABB 1SAR330020R0000​ handles the whole sequence—main contactor close → delay → open star, close delta—on one 22.5 mm slice. In pump lead-lag panels, the same relay toggles between interval (fixed run-time) and repeat-cycle (duty/rest) by rotating the knob, no rewiring. Commissioning engineers working across varied panels appreciate that ABB 1SAR330020R0000​ adapts to the drawing rather than the other way around.

16 A SPDT contact kills the interposing relay.​ Most electronic timers cap at 5–8 A, forcing an interposing relay (e.g., ABB CR-M / Finder 60 series) between timer and contactor coil—extra DIN slice, extra failure point, extra wiring. ABB 1SAR330020R0000​ rates 16 A @ 250 V AC on the C/O directly, which covers the coil inrush of ABB A16 (up to 7.5–11 kW motor starters) and many A26 applications without help. Silver-alloy contact material plus ABB’s arc-quench geometry keeps the contact from welding during repetitive starter cycling. That said, best practice still dictates contactor-coil interposition for >16 A contactors or highly inductive DC coils—ABB 1SAR330020R0000​ is honest about its 30 V DC rating ceiling.

Quartz timebase and EMC hardening for VFD-rich panels.​ Cheap timers drift when a 75 kW drive kicks in next door; ABB 1SAR330020R0000​ uses a quartz crystal derived timebase (±1 % ±20 ms) that holds through temperature swing and supply ripple, and the PCB layout + screened enclosure pass IEC 61000-4 surge/ESD/EFT, so the relay sits calmly in a full VFD MCC where three ABB ACS880 drives are switching 415 V on the same bus. The bi-color LED is a small but valued field touch—green for “supply alive,” red for “output timed in”—letting a maintenance tech diagnose “timer didn’t pick up” vs “timer picked but load didn’t” without a meter.

Drop-in for legacy pneumatics and competitor timers.​ Plants retiring old ABB EMR / pneumatic dampers (the ones with the little adjustment wheel that sticks in humid summers) find ABB 1SAR330020R0000​ pins out identically on 22.5 mm DIN with screw terminals, and the 8-mode set covers every pneumatic function plus extras. Cross-migration from Crouzet 888 / Finder 80 series / Schneider RE17 is straightforward on terminal layout; the universal voltage means the swap rarely needs a PSU change. For MRO buyers standardizing a site’s timer SKU list, ABB 1SAR330020R0000​ displaces 3–4 legacy singles into one multisource part.

Application Field

The ABB 1SAR330020R0000​ lands wherever a DCS/PLC needs a local, hard-wired timing element that survives processor mode, comms loss, or scan-cycle limitations—and wherever motor/pump/valve sequencing still runs on conventional contactor logic alongside the digital layer. The densest deployment is motor control centers (MCCs): star-delta starters for pumps, fans, and compressors in water treatment, HVAC plant rooms, and process skids routinely use ABB 1SAR330020R0000​ for the delta-transition timer, with the 16 A contact driving the delta contactor directly. In combined-cycle and biomass plants where ABB Ovation or Siemens T3000 supervise the BOP, local MCC buckets for CW pumps, BFPT lube-oil skids, and ash-handling conveyors still carry hard-wired starter sequences—ABB 1SAR330020R0000​ is the timer of choice because its -25 °C cold-start and 55 °C sustained rating suit both indoor MCC and semi-exposed pump-house panels.

Pump lead-lag and duty-standby sequencing​ is a second major lane. In municipal water lift stations and industrial cooling-water loops, ABB 1SAR330020R0000​ in repeat-cycle or interval mode enforces minimum run-time on the lead pump before allowing hand-off-auto transfer, and provides a “cool-down” pause before the standby restarts—logic that is often kept hard-wired so the PLC’s downtime (e.g., during a TIA Portal download) doesn’t stall the pumps. The relay’s 0.1 s lower bound also lets it serve as a debounce / nuisance-trip blanking element on PLC DI points that see contactor bounce or float-switch chatter.

HVAC and building-services panels​ consume the relay heavily in AHU/fan-coil sequences: damper-motor pre-purge delay before fan start, frost-stat override timing, heating-element staging via contactor, and night-setback lighting relays in plant corridors. Here the ABB 1SAR330020R0000​ 230 V AC native supply is the win—no separate 24 V DC PSU needed in a small AHU panel that otherwise runs on 230 V control.

Conveyor and packaging machinery​ represent the OEM skid market: infeed delay, accumulation zone dwell, star-wheel index timing, and safety-gate re-arm delays all land on ABB 1SAR330020R0000​ because the 100 h upper range covers long dwell/soak cycles (e.g., adhesive cure timers on a labeling head) while the 0.1 s floor catches high-speed indexing. Machine-builders shipping CE-marked panels to both EU and NA markets lean on the universal-voltage ABB 1SAR330020R0000​ to keep one BOM across destinations.

Retrofit context closes the loop: plants running 15–20 year old pneumatic ABB / Crouzet / P&B timers face drift complaints and spare obsolescence. Swapping to ABB 1SAR330020R0000​ recovers ±1 % accuracy, eliminates seasonal drift, and collapses the spare SKU count. For maintenance managers, keeping 3–5 cold-spare ABB 1SAR330020R0000​ on the storeroom rack covers star-delta starters, pump timers, HVAC dams, and conveyor delays across the whole site—a rare “one-SKU-covers-most” win in industrial MRO.