Siemens 3RT2024-1AP00 Power Contactor

Product Positioning: SIRIUS Innovation series, Size S0, 3-pole AC contactor. Designed for start/stop control of 3-phase motor and load, with screw terminals and DIN rail mounting.

✅ Model Breakdown

3RT2: New generation SIRIUS contactor series

024: Specification code, AC-3 12A / 5.5kW @400V

1: Built-in auxiliary contacts 1NO + 1NC

A: AC coil

P: 230V AC 50Hz

00: Screw terminals, no additional function modules

📋 Core Technical Parameters

🧩 Application Scenarios

Start/stop and reversing control of 3-phase asynchronous motors

Fans, water pumps, belt conveyors and small machine tool loads

HVAC and automation control cabinet power circuits

🔁 Reference Replacement Models

1. Upgrade relation: 3RT1024-1AP00 (old, discontinued) → 3RT2024-1AP00 (successor)
2. Same rating with different coil voltage:

3RT2024-1AN20: AC220V 50/60Hz wide-range coil

3RT2024-1BB40: DC24V coil

3. Domestic equivalent: Siemens 3RT6024-1AP00 (locally manufactured, identical electrical parameters)

⚠️ Selection & Maintenance Notes

1. For replacement, verify: AC-3 current rating, coil voltage, quantity of auxiliary contacts
2. Recommended matched thermal overload relay: 3RU2124 series (for 5.5kW motors)
3. Optional accessories: surge suppressor, side-mounted auxiliary contacts, mechanical interlock
4. Second-hand inspection checklist: coil resistance measurement, main contact erosion check, pull-in & release action test

Siemens 3RT2024-1AP00 Full Technical Data

SIRIUS 3RT2, S0 frame, 3-pole power contactor, screw terminals, DIN rail mounting

1. Main Contacts (Power Circuit)

1. Built-in Auxiliary Contacts

Configuration: 1NO + 1NC (integrated, non-removable)

Auxiliary contact rating: AC-15 3A / DC-13 0.5A

Max voltage for auxiliary contacts: 400V AC

III. Coil Parameters (Control Circuit)

1. Service Life & Operating Frequency

Mechanical life: 10,000,000 operations

AC-3 electrical life: approx. 1,000,000 operations

Max operating frequency under AC-3: 1000 cycles/hour

Max operating frequency under AC-4: 300 cycles/hour

1. Environmental, Dimensional & Mechanical Data

Frame size: Size S0

Overall dimension: W45mm × H85mm × D97mm

Net weight: approx. 0.405kg

Mounting: 35mm DIN rail, or plate mounting via screws

Terminals: Screw clamp terminals

Operating ambient temperature: -25℃ ~ +60℃ (inside cabinet)

Storage temperature: -55℃ ~ +80℃

Protection class: IP20 (front face and terminals)

1. Standards & Certifications

Compliance standard: IEC 60947-4-1 / GB 14048.5

Certifications: CCC, CE, UL

HS Code: 85364900

VII. Model Definition

3RT2: New generation SIRIUS contactor series

024: Specification code, AC-3 12A, S0 size

1: Built-in 1NO+1NC auxiliary contacts

A: AC coil

P: AC230V 50Hz

00: Screw terminals, no built-in surge suppression

VIII. Matching Selection Reference

1. Thermal overload relay: 3RU2124 (matched for 5.5kW motors)
2. Accessories: side-mounted auxiliary contacts, RC surge absorber, mechanical interlock module
3. Locally manufactured equivalent model: 3RT6024-1AP00, fully identical electrical parameters

Siemens 3RT2024-1AP00｜Application Fields & Load Types

Specification baseline: S0 frame, AC-3 12A / 5.5kW@400V, 3-pole AC contactor. Primarily used for direct-on-line (DOL) starting of 3-phase motors; also suitable for AC-1 resistive loads. Integrated 1NO+1NC auxiliary contacts for PLC feedback and interlock circuits.

🏭 1. General Machinery Manufacturing (Most Common)

Small machine tools: cooling pumps, lubrication pumps, chip removal motors

Conveying equipment: belt conveyors, roller lines, elevators

Pneumatic systems: start/stop for small piston air compressor motors

Packaging equipment: stretch wrappers, case sealers, small stirring motors

Woodworking & plastic machinery: shredders, auxiliary extruder motors, fans

🌬️ 2. HVAC & Building Automation

Air handling unit fans, cooling water pumps, condensate pumps for central air conditioning

Small compressors, exhaust fans and fresh air fans of air-cooled / water-cooled units

Building control cabinets, fire smoke exhaust fans (with thermal relay protection)

Resistive loads: electric heating elements, commercial lighting circuits (AC-1, max.20A)

🥤 3. Food, Beverage & Pharmaceutical Industry

Wash pumps, agitator tanks, transfer pumps, small drive motors for filling lines

Fans and pump sets for CIP cleaning systems

Fans and circulating water pumps in cold storage and clean rooms

Advantages: Wide temperature range -25~+60℃, CCC/CE/UL certifications, suitable for clean control cabinets

💧 4. Water Treatment & Water Supply/Drainage

Small sewage pumps, clean water pumps, chemical dosing agitator motors

Rainwater harvesting, greywater systems, filter drive motors

Local pump station control cabinets, PLC remote start-stop + operation feedback (via built-in auxiliary contacts)

🚗 5. Automotive & Component Automation

Tooling fixtures, roller conveyors at workstations, workstation cooling fans

Exhaust fans in spray booths, small hydraulic station motors

Motor start-stop control for test benches

⚙️ 6. Other Industrial Applications

1. MCC Motor Control Centre: 5.5kW motor circuits in drawer units; forms complete motor protection unit together with circuit breaker and thermal relay
2. VFD bypass: Bypass switching for small variable frequency drives (Note: Frequent switching is not recommended)
3. Small hydraulic stations: Start-stop control for hydraulic oil pump motors
4. Solar / energy storage auxiliary: Cabinet cooling fans and circulating pump control

✅ Applicable Load Types

1. AC-3: 3-phase asynchronous motor (5.5kW@400V), Direct-On-Line (DOL) starting (primary use)
2. AC-1: Resistive loads, electric heating, incandescent lamp groups, max.20A
3. AC-4: Motor inching and forward/reverse rotation (Note: limited operating frequency, max.300 cycles/hour)

❌ Non-suitable Scenarios

Motors rated >5.5kW

Heavy frequent inching and heavy shock duty (long-term high frequency under AC-4)

Capacitor reactive power compensation (special 3RT26 capacitor contactor required; this model cannot be substituted)

DC main circuit loads (this is an AC contactor)

💡 Selection Key Points

Built-in 1NO+1NC mirror auxiliary contacts for running feedback, fault interlocking and safety circuits, ideal for PLC automation control

DIN rail mounting, compact width (45mm), suitable for dense cabinet layout

Siemens 3RT2024-1AP00｜Cross-Brand Equivalent Comparison Table

Baseline specification: 3P, AC-3 12A, 5.5kW@400V, AC230V 50Hz coil, built-in 1NO+1NC auxiliary contacts, screw terminals, DIN rail

⚠️ Note: Electrically equivalent replacement; overall dimensions, cutouts and accessories may not be fully compatible. Verify mounting dimensions and auxiliary contact configuration before cabinet retrofit.

✅ Key Notes for Cross-brand Replacement (Engineering)

1. Auxiliary Contacts: The reference model has built-in 1NO+1NC. Many economical models only have 1NO (e.g. LC1N1210), cannot be directly replaced due to missing NC feedback contact. Must select suffix 1211 (1NO+1NC).
2. Coil Voltage: Baseline AC230V 50Hz. Distinguish:

M7=AC220V 50/60Hz; P7=AC230V 50Hz (fully matches coil of this model)

3. Mounting Dimensions: Siemens S0 frame width 45mm; Schneider LC1D12, ABB AF12 also 45mm width, directly mountable on DIN rail, cutout generally compatible. Depth differs; verify depth if cabinet space is limited.
4. Matched Thermal Relay: Thermal relay model must be changed when switching brand. Contactors and thermal relays from different brands cannot snap-fit together, separate mounting required.
5. Mechanical Interlock & Accessories: Cross-brand accessories not interchangeable. Reversing interlock modules and side-mounted auxiliary contacts cannot be mixed.

❗ Quick Selection Recommendation

Direct replacement for project, high compatibility: Schneider LC1D12P7

Cost reduction with domestic product: CHNT NXC-12 11 AC230V

Overseas project, wide voltage requirement: ABB AF12-30-11-13

Siemens 3RT2024-1AP00 (S0 Frame) Mounting Dimensions

Unit: mm

Overall Dimensions

Width W：45

Height H：85

Depth D：97 (from DIN rail backplate to front of terminals)

Mounting Methods

1. DIN rail mounting: Standard 35mm DIN rail (DIN EN 60715), clip-on installation
2. Screw fixing: Can also be plate-mounted directly on backplate (without rail)

Mounting orientation: ±180° rotation on vertical plane; ±22.5° tilt forward/backward allowed

Cabinet Clearance for Heat Dissipation

Side-by-side installation: 0mm clearance (can be mounted tightly together)

Minimum top, bottom and front clearance: 10mm

Clearance to earthed metal parts: ≥6mm laterally, ≥10mm top/bottom/front

⚠️ Dimension change after adding accessories (Important for cabinet cutout design)

1. Front-mounted auxiliary contact block: Width & height unchanged, depth increases by 44mm
2. Side-mounted auxiliary contacts: Height & depth unchanged, width increases

This unit has built-in 1NO+1NC auxiliary contacts; dimension remains 45×85×97 without extra accessories.

Weight

Net weight: 0.405kg

Replacement Reference

Schneider LC1D12P7 also has 45mm width, compatible DIN rail position; but depth varies slightly. Double-check depth for cabinet retrofit with limited depth.