Siemens 3RT20244AP60 Electromechanical Contactor
Overview
The 3RT20244AP60 is a Siemens Sirius (Size S0) electromechanical contactor rated for 12 A continuous load current with a 240 VAC coil. It carries the standard 3RT2024 base product number and includes one auxiliary contact function as part of the built-in auxiliary contact block. The contactor is packaged in a box-style enclosure and supports both chassis-mount and DIN-rail installation. Operating temperature is specified from 25°C to 60°C.
The data source did not provide the following fields: switching voltage rating, dielectric strength, making/breaking capacity, terminal style, coil inrush/power consumption, insulation class, mechanical dimensions, weight, IP rating, or auxiliary contact arrangement detail. Selection on electrical safety margins must not proceed until verified against the official Siemens datasheet for the 3RT2024 series.
Key Parameters
| Parameter | Value |
|---|---|
| MPN | 3RT20244AP60 |
| Brand | Siemens |
| Series | 3RT2024 (Sirius S0) |
| Contact Rating | 12 A |
| Coil Voltage | 240 VAC |
| Coil Power | 67 VA |
| Must Operate Voltage | 192 VAC |
| Contact Form | 3PST-NO (3 Form A) |
| Encapsulation | Box |
| Mounting | Chassis Mount, DIN Rail |
| Operate Time | 40 ms |
| Operating Temperature | 25°C ~ 60°C |
| Features | Auxiliary Contacts |
Verification required before selection: Switching voltage, dielectric strength, making/breaking capacity, terminal style and wire size range, coil inrush current, insulation class, and mechanical dimensions are not populated in the supplied fields. The auxiliary contact arrangement (1NO/1NC per the title) is also not enumerated in the structured specs. Confirm all ratings against the Siemens 3RT2024 series datasheet.
Integration and Installation Notes
The contactor supports standard DIN-rail mounting (35 mm rail) and chassis mounting. Enclosure requirements, IP rating, and terminal torque specifications are not present in the supplied data and must be obtained from the datasheet. For motor branch or lighting contactor applications, verify coordination with upstream short-circuit protective devices and downstream overload relays—the 12 A rating and 40 ms operate time are given, but coordination categories and utilization category (e.g., AC-1, AC-3) are not supplied.
Similar Catalog Parts
The catalog returned seven alternates within the same 3RT2024 family sharing the same base product number, mounting type, contact form, and current rating but differing in coil voltage or coil power type (AC vs DC).
| Parameter | 3RT20244AP60 (seed) | 3RT20244AR60 | 3RT20244BB40 |
|---|---|---|---|
| Coil Voltage | 240 VAC | 440 VAC | 24 VDC |
| Coil Power | 67 VA | 67 VA | 5.9 W |
| Must Operate Voltage | 192 VAC | 374 VAC | 19.2 VDC |
| Operate Time | 40 ms | 40 ms | 170 ms |
| Contact Rating | 12 A | 12 A | 12 A |
| Mounting | Chassis, DIN Rail | Chassis, DIN Rail | Chassis, DIN Rail |
| Similarity | — | 0.96 | 0.92 |
Why they are similar: All share the 3RT2024 base product number, the same 3PST-NO contact form, 12 A load rating, auxiliary contacts feature, and chassis/DIN-rail mounting. The AC coil variants (AP60, AR60, AG60, AN60, AK60) share 67 VA coil power and 40 ms operate time. The DC variant (BB40) differs by having a 24 VDC coil, lower coil power (5.9 W), and a substantially longer operate time (170 ms), which is typical for DC coil contactors in this series.
The primary distinction among the AC coil alternates is the coil voltage (110–440 VAC range), allowing selection to match the control circuit voltage available in the installation. The DC coil option enables use with low-voltage DC control systems.
FAQ
Q: What coil voltage does the 3RT20244AP60 require? A: The coil is rated for 240 VAC. The must-operate voltage is 192 VAC (80% of nominal), which defines the minimum control voltage required to guarantee pull-in under worst-case conditions.
Q: Can the 3RT20244AP60 be used in a 24 VDC control circuit? A: No—the seed part has an AC coil (240 VAC). The catalog list includes 3RT20244BB40 as a DC coil variant (24 VDC coil, 5.9 W, must-operate 19.2 VDC) within the same series. Verify that the DC variant's operate time (170 ms vs. 40 ms) meets the timing requirements of the application.
Q: What is the auxiliary contact configuration? A: The title lists "1NO/1NC" (one normally open, one normally closed). This detail is present in the catalog title but is not enumerated as a separate structured spec field. Confirm the exact contact arrangement from the Siemens 3RT2024 datasheet before finalizing the auxiliary circuit design.