Siemens 3RT20182CK643MA0 S00 Contactor
MPN and Family Position
The MPN prefix 3RT identifies this as a Siemens industrial contactor; the digit sequence indicates the S00 size class and coil voltage variant. The suffix encodes the contact arrangement (2NO/2NC) and the 120VAC coil. On record, the contactor carries a 16 A current rating, a box-encapsulated S00 form factor, and ROHS3 Compliant status.
Engineering Verification Checklist
- Coil voltage match: confirm the system supply is rated 120 VAC for the operating coil.
- Contact arrangement: verify 2NO + 2NC auxiliary configuration matches the interlock and control logic requirements.
- Current rating: the contacts are rated 16 A — confirm the connected load falls within this rating for the intended duty.
- Mounting compatibility: confirm chassis-mount or DIN-rail attachment per the S00 form factor.
- Operating temperature: verify the surrounding enclosure temperature stays within the 25°C to 60°C window or the alternate's extended range if applicable.
- Clearance and creepage: check that the box-style encapsulation and S00 footprint provide adequate spacing for maintenance access.
- ROHS compliance: the record lists ROHS3 Compliant — confirm this satisfies the project-level material restriction requirements.
Catalog Parameter Summary
| Parameter | Value |
|---|---|
| Base Product Number | 3RT2018 |
| Contact Rating | 16 A |
| Coil Voltage | 120 VAC (seed); 24VDC – 230VAC available in alternates |
| Contact Form | 3PST-NO (3 Form A) with 2NO/2NC auxiliaries |
| Encapsulation | Box |
| Mounting | Chassis Mount, DIN Rail |
| Operating Temperature | 25°C – 60°C (standard); 40°C – 70°C in some alternates |
| Operate Time | 35 ms (AC coils); 100–130 ms (DC coils) |
| ROHS | ROHS3 Compliant |
| Product Status | Active |
Coil and Timing Context
Alternates in this catalog group span AC and DC coil families within the same 3RT2018 base series. The seed unit carries a 120VAC coil with a typical operate time of 35 ms. DC-coil variants (24VDC, 110VDC, 125VDC) show longer operate times in the 100–130 ms range and higher coil power draw in some cases. When evaluating control-circuit response speed, the AC coil offers faster energization relative to DC coils in the same footprint.
In-Catalog Comparison Rows (Not OEM-Endorsed Substitutes)
| Parameter | 3RT20182CK643MA0 (seed) | 3RT20182AK643MA0 | 3RT20182CP043MA0 | 3RT20182FB443MA0 |
|---|---|---|---|---|
| Coil Voltage | 120VAC | 120VAC | 230VAC | 24VDC |
| Coil Power | — | 36VA | 33VA | 4W |
| Operate Time | — | 35 ms | 35 ms | 100 ms |
| Operating Temp | — | 25°C–60°C | 25°C–60°C | 25°C–60°C |
| Base Product Number | 3RT2018 | 3RT2018 | 3RT2018 | 3RT2018 |
Why 3RT20182AK643MA0 is similar: shares the 120VAC coil and S00 mechanical form factor; the same 16 A contact rating and box encapsulation apply. Operate time and temperature window are identical.
Why 3RT20182CP043MA0 is similar: identical base product series, contact rating, and auxiliary configuration; the coil voltage shifts to 230VAC, requiring re-verification of control-circuit supply.
Why 3RT20182FB443MA0 is similar: same 3RT2018 series and 16 A rating, but the coil is 24VDC; the contactor operates slower (100 ms) and coil power falls to 4W, making DC control topology a prerequisite.
FAQ
What coil voltage does the 3RT20182CK643MA0 use? The record shows a 120VAC coil. Coil power, must-operate voltage, and operate time are not present in the seed data but are listed in alternate entries for the same base series.
Can the 3RT20182CK643MA0 be mounted on a DIN rail? Yes — the record lists both chassis-mount and DIN rail mounting for the S00 size class.
Does the contactor include auxiliary contacts? The title specifies 2NO/2NC. The record flags auxiliary contacts as a feature, consistent with this configuration.