3RT2024-2BB40
power contactor, AC-3e/AC-3, 12 A, 5.5 kW / 400 V, 3-pole, 24 V DC, auxiliary contacts: 1 NO + 1 NC, spring-loaded terminal, size: S0
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 12.5 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 2 hp |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 2 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.3 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA) |
| Short-circuit coordination type 2, fuse | gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA) |
| Aux. switch short-circuit protection, fuse | gG: 10 A (500 V, 1 kA) |
| Parameter | Value |
|---|---|
| Main circuit connection | spring-loaded terminals |
| Aux. / control circuit connection | spring-loaded terminals |
| Conductor cross-section, solid | 1 ... 10 mm² |
| Conductor cross-section, solid or stranded | 2x (0.5 ... 2.5 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Side-by-side mounting | Yes |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 102 mm |
| Depth | 107 mm |
Frequently asked questions
What does the -2BB40 suffix mean on a Siemens 3RT2024 contactor?
Decoding the suffix is the fastest way to confirm coil voltage, terminal type, and aux contact configuration before ordering.
What are the full electrical specifications of the Siemens 3RT2024-2BB40?
Engineers need coil voltage, AC-3e current, kW rating, and pole count verified against the datasheet for panel design.
Is the 3RT2024-2BB40 suitable for AC-3e applications and what does that rating mean?
AC-3e defines energy-efficient motor switching limits that affect which loads the contactor can legally handle.
Which overload relays are compatible with the 3RT2024-2BB40?
Motor protection coordination requires matching the right Sirius 3RU or 3RB overload to the S0 contactor frame.
How do you wire the 1 NO + 1 NC auxiliary contacts on a 3RT2024-2BB40?
Correct spring-terminal wiring of aux contacts is essential for safety interlocks and PLC feedback.
What is the price and current stock/lead time for the 3RT2024-2BB40?
Sourcing decisions hinge on whether the part is available from authorized channels and at what price point.