Siemens 3RT2027-1AP00 Contactor

1. Core Parameters Overview

Siemens 3RT2027-1AP00 is an innovative 3-pole AC contactor from the SIRIUS 3RT2 series, designed for motor control and power switching applications.

2. Detailed Technical Specifications

2.1 Main Circuit Parameters

Rated Insulation Voltage (Ui): 690V e

Rated Operational Voltage (Ue): 400V e (AC-3), fino a 690 V CA

Rated Impulse Withstand Voltage (Uimp): 8kV

Rated Operational Current:

AC-1 (carico resistivo): 40UN (400V), 32UN (690V)

AC-3 (motor load): 32UN (400V), 21UN (690V)

AC-3e: 32UN (400V)

Rated Making Capacity (AC-3): 320UN (400V), 5 operazioni

Rated Breaking Capacity (AC-3): 160UN (400V), 50 operazioni

2.2 Control Circuit Parameters

Rated Coil Voltage (Uc): 230V e, 50Hz

Rated Coil Power: Approx. 70VA (inrush), approx. 8VA (holding)

Coil Pick-up Time: ≤60ms

Coil Drop-out Time: ≤40ms

Control Circuit Terminals: A1, A2 (top or bottom connection)

2.3 Physical & Mounting Parameters

Dimensioni (W×D×H): 45mm×85mm×97mm

Peso: Approx. 420g (0.928lb)

Mounting Position: Vertical (standard), ±15° tilt permitted

Wiring Capacity: Circuito principale (10–35mm² copper cable), Circuito di controllo (0.5–2.5mm² copper cable)

3. Features & Benefits
4. High Efficiency & Energy Saving

Innovative electromagnetic design with low holding power, reducing energy consumption by approx. 30% compared to conventional contactors.

2. Safe & Reliable

Built-in surge suppression circuit to reduce EMI

Silver-cadmium oxide contacts for excellent arc resistance and long service life

Complies with IEC 60947-4-1 and EN 60947-4-1 standard

3. Flexible Extension

Supports add-on modules: contatti ausiliari, surge suppressors, mechanical interlocks, ecc.

4. Easy Maintenance

Transparent housing for visual status check

Contact wear indicator

Fast-connection design for reduced installation time

4. Applications
5. Controllo motorio

Avviamento diretto, stopping and reversing of three-phase asynchronous motors up to 15kW.

2. Power Switching

Control of non-motor loads such as resistance furnaces, heaters, capacitor banks.

3. Automation Systems

Actuator in PLC control systems for remote control and logic switching.

4. Industrial Fields

Fans, pumps, compressori

Conveyors, mixers and machinery

HVAC systems in building automation

5. Replacement & Compatible Models

5.1 Siemens Same-Series Replacements

3RT2027-1AP00 (50Hz) ↔ 3RT2027-1AP01 (60Hz) – same electrical performance, only frequency differs

3RT2027-1BP40 – 400V AC, 50Hz coil

3RT2027-1AP02 – 230V AC, 50/60Hz (wide frequency)

5.2 Cross-Brand Equivalents (Functionally Compatible)

5.3 Recommended Accessories

Auxiliary Contact Blocks: 3RT2916-1BB00 (2NO), 3RT2916-1BC00 (2NC)

Surge Suppressor: 3RT2926-1BB00 (for AC coils)

Mechanical Interlock: 3RT2936-1AA00 (for reversing applications)

Overload Relays: 3RU61 series (e.g. 3RU6126-4CB00, 32A setting range)

6. Selection & Replacement Notes
7. Carica corrispondenza

Verify load type (AC-1/AC-3), current and power do not exceed contactor ratings.

2. Tensione della bobina

Confirm control circuit voltage and frequency to avoid coil burnout (230V e, 50Hz only).

3. Contatti ausiliari

Ensure 1NO+1NC meets control logic; add extension modules if needed.

4. Installation Space

S0 frame (45mm width) for compact cabinets; maintain ≥5mm clearance to adjacent devices.

5. Legacy Replacement

Direct replacement for 3RT1027 series, mounting-compatible

For non-Siemens replacements, verify mounting holes and terminal layout

6. Condizioni ambientali

Derate at temperatures < -25°C or > +60°C (approx. 10% per 10°C).

7. Ordering & Lifecycle Information

Product Status: Active (PLM: PM300), available for order

Packing: 1 unit/box, including installation manual

Country of Origin: Germania

Certifications: CE, UL, CSA, IEC and other international approvals

Complete Guide to Replacement Models for Siemens 3RT2027-1AP00 Contactor

1. Core Parameters Recap (Replacement Base)

3RT2027-1AP00 – Siemens SIRIUS 3RT2 series 3-pole AC contactor:

Corrente nominale (AC-3, 400V): 32UN, Rated Power: 15kW

Coil: 230V e, 50Hz

Contacts: 3NO main + 1NO+1NC auxiliary

Frame: S0, Terminals: screw, Mounting: 35mm DIN rail / panel

2. Siemens Same-Series Replacements

2.1 Identical Rating, Different Frequency

2.2 Different Coil Voltages (Same Size & Contacts)

2.3 Upgraded Series

3RT7027-1AN20: New 3RT7 series, 32UN, 230V CA 50/60 Hz, fully mounting-compatible

3RT2027-1AP00-1AA0: Integrated surge suppressor, fewer external parts

3. Cross-Brand Equivalent Replacements

3.1 Direct Equivalents

3.2 High-Performance Upgrades

4. Special Application Replacements

4.1 DC Coil Replacements

4.2 No / Extra Auxiliary Contacts

5. Replacement Guidelines (Sicurezza & Reliability)

5.1 Priority Matching Parameters

1. Corrente nominale & load class: AC-1 / AC-3, must be ≥ load current
2. Coil voltage & frequency: Must match control supply (230V AC 50Hz only)
3. Contact configuration: 3NO main required; 1NO+1NC auxiliary as needed
4. Mounting & wiring: S0 (45mm), screw terminals, DIN/panel space

5.2 Cross-Brand Checks

Dimensioni: Width 45mm, height, depth

Terminal positions and wiring layout

Clearances and creepage distances per IEC 60947-4-1

Auxiliary contact rating (typically ≤5A)

5.3 Environment & Derating

Derate above 60°C or below -25°C (≈10% per 10°C)

Derate at high altitude: 0.9 (2000–3000m), 0.8 (3000–4000m)

6. Recommended Replacement Summary
7. Best Siemens replacement: 3RT2027-1AL20 (wide-frequency, global, direct fit)
8. Top cross-brand choices: Schneider LC1D32M7C or ABB A145-30-11 (mature, widely available)
9. DC control replacement: 3RT2027-2BB40 (original Siemens, reliable)