ABB AX150-30-11-80 AC Contactor

Step-by-Step Model Code Decoding

AX150-30-11-80

1. AX: New generation general-purpose AC contactor series of ABB
2. 150: Rated operational current of 150A under AC-3 load at 400V
3. 30: 3-pole main contacts, 3 normally open (no main normally closed contacts)
4. 11: Built-in standard auxiliary contacts: 1 Normally Open + 1 Normally Closed (1NO+1NC)
5. 80: Coil code → AC 220–230V 50Hz / AC 230–240V 60Hz (Standard domestic AC 220V coil)

Original factory material order number: 1SFL991074R8011

Domestic catalog order number: 10139720

2. Core Electrical Parameters

2.1 Main Circuit Load (IEC 60947-4-1)

2.2 Coil Control Circuit

Coil voltage: 220–230V 50Hz; 230–240V 60Hz

| Pull-in voltage range: 0.85～1.1 × rated voltage

Drop-out voltage: ≤0.1 × rated voltage

Coil type: AC excitation coil

2.3 Auxiliary Contacts

Standard configuration: 1NO + 1NC, no extra auxiliary contact blocks required

Rated current of auxiliary contacts: 6A AC-15

3. Environmental & Mechanical Parameters
4. Ambient Temperature

Without thermal overload relay: -40℃ ~ +70℃

Matched with thermal overload relay: -25℃ ~ +55℃

Storage temperature: -40℃ ~ +70℃

2. Installation Altitude: ≤3000m (Derating is required above 3000m)
3. Overall Dimensions: W 90mm × H 148mm × D 123.5mm
4. Mounting Method: Dual-purpose for standard 35mm DIN rail mounting and screw fixing
5. Terminal Connection: Main circuit busbar connection, compatible with cable/busbar crimping
6. Protection Class: IP20 (For indoor cabinet installation only)
7. Typical Application Scenarios
8. Start-stop control of three-phase asynchronous motors (75kW motors for fans, water pumps, air compressors, injection molding machines)
9. Switching contactors for capacitor compensation cabinets (AC-1 load)
10. High-power load control for central air conditioning and HVAC systems
11. Power circuits for machine tools, lifting and conveying equipment
12. Standard power switching device for power distribution cabinets and complete control cubicles
13. Optional Matching Accessories

TA200DU series thermal overload relays (Matching 150A current range)

Mechanical interlock module (For forward/reverse bidirectional control)

Side-mounted / front-mounted extended auxiliary contact modules

Surge suppressors (RC absorber, varistor for coil protection)

Terminal protective covers

6. Equivalent Replacement Reference
7. Same series, same current rating with different coil voltages:

AX150-30-11-81: AC 110V coil; AX150-30-11-84: AC 380V coil

2. Upgrade replacement for old model: A150-30-11 → AX150-30-11 (Direct interchange, identical mounting dimensions)
3. Cross-brand equivalent alternatives: Schneider LC1D150, Siemens 3RT1056
4. Key Advantages
5. Compliant with IEC, CE and national standards; Type 2 short-circuit coordination, safe and reliable when matched with circuit breakers/fuses
6. Mirror contact design, applicable to safety circuits and interlock control
7. Eco-friendly flame-retardant materials, low-power coil, low temperature rise during long-term operation
8. Compact size, less cabinet space occupation compared with the old A series

Official Mechanical Endurance Parameters of ABB AX150-30-11-80

1. Mechanical Durability

10 million operations (10×10⁶ cycles)

Test conditions: No load on the main circuit; only reciprocating make/break driven by the coil mechanism. No electric arc or contact electrical wear; only mechanical service life of springs, armature, brackets and other mechanical components is assessed.

2. Key Supporting Frequency Parameters

Maximum mechanical operating frequency: 3600 operations/hour (Standard no-load test condition)

Maximum electrical operating frequency (AC-3 motor load): 300 operations/hour (Load start-stop, limited by contact arcing)

3. Distinction: Mechanical Life vs Electrical Life (AC-3 Working Condition)

4. Supplementary Notes
5. All high-current models of the full AX series (AX110/AX150/AX185/AX205) share a uniform mechanical life of 10 million cycles; the old A150 also features 10 million mechanical cycles with structurally compatible direct replacement.
6. Ambient temperature, altitude, dust and oil contamination will slightly shorten the actual mechanical service life; the nominal value can be achieved under clean cabinet and normal temperature conditions.
7. The mechanical life remains unchanged at 10 million cycles after installing a mechanical interlock module in reversible control circuits.

Complete Operating Principle of ABB AX150-30-11-80 AC Contactor

1. Core Internal Structure
2. Electromagnetic Driving System (Coil + Fixed Core + Movable Armature)

Coil: The coil with code 80 is an AC 220V excitation coil wound on the fixed core.

Fixed Core: Fixed base fitted with a shading ring on the end face (Core noise and vibration suppression component for AC contactors)

Movable Armature: Movable iron core linked synchronously with main and auxiliary contacts

Return Spring: Pushes the armature open under normal state to ensure reliable contact separation after power-off

2. Main Contact Circuit (3 Normally Open Main Poles)

Three sets of high-power silver alloy moving and fixed contacts that carry 150A three-phase main circuit current to control loads such as 75kW motors.

3. Auxiliary Contacts (1NO+1NC)

Operate synchronously with main contacts, used for self-locking, interlocking, signal feedback and indicator light circuits, rated at 6A.

4. Arc Chute

Grid-type metal arc shield that splits and cools electric arcs during heavy current breaking to prevent contact melting and welding.

5. Base & Linkage Bracket

Insulated plastic bracket that drives all moving and fixed contacts to open/close synchronously with armature movement.

2. Make Operation When Energized
3. Rated AC 220V voltage is supplied to the coil via the control circuit, generating an alternating magnetic field.
4. Electromagnetic attraction produced by the fixed core overcomes the tension of the return spring and pulls in the movable armature.
5. The linkage bracket moves downward synchronously:

Three sets of main normally open contacts close, conducting the three-phase main circuit and energizing the motor/load for operation.

Auxiliary Normally Open (NO) contacts close and auxiliary Normally Closed (NC) contacts open.

4. Function of the shading ring on the fixed core end face: AC voltage crosses zero every cycle, causing instantaneous magnetic field disappearance and attraction drop. The shading ring induces a lagging current to maintain partial attraction, eliminating high-frequency armature chattering, abnormal noise and contact sparking.
5. No electric arc occurs inside the arc chute, and the circuit conducts stably.
6. Break Operation When De-energized
7. Coil power supply from the control circuit is cut off; the alternating magnetic field of the coil vanishes rapidly and electromagnetic attraction drops to zero.
8. The return spring rebounds instantly to separate the movable armature from the fixed core.
9. All contacts reset synchronously:

Three groups of main contacts open, cutting off the main circuit and stopping the load.

Auxiliary NO contacts open and NC contacts restore closed state.

4. High-voltage electric arcs generate the instant main contacts separate (Current cannot mutate for inductive loads).

The arcs enter the arc chute, split into small segments by multi-layer metal grids, cool down rapidly and extinguish to avoid contact fusion welding.

4. Self-Locking Control Principle (Standard Motor Start-Stop Circuit)
5. Press the start button → Coil energizes, contactor pulls in and auxiliary NO contact closes synchronously.
6. After releasing the start button, current continuously feeds the coil through the closed auxiliary NO contact to sustain the pull-in state (Self-locking function).
7. Press the stop button to cut off coil power; the spring releases the armature, all contacts of the contactor reset and the equipment shuts down.
8. Key Matching Protection Logic
9. Matching with thermal overload relay: Under overload conditions, the normally closed contact of the thermal relay opens the contactor coil circuit and cuts off motor power supply.
10. Mechanical interlock installed for reversible circuits: Interlock two AX150 contactors to prevent simultaneous pull-in of forward and reverse contactors which would cause three-phase short circuit.
11. RC surge suppressor connected in parallel with the coil: Absorbs induced high voltage generated during breaking to avoid breakdown of low-current contacts of PLCs and relays.
12. Core Difference Between AC and DC Contactors (AX Series Equipped with AC Coils)

The AX150 adopts AC excitation and relies on a shading ring to eliminate vibration. DC contactors require no shading ring and maintain pull-in via constant magnetic attraction.

AC electric arcs extinguish more easily than DC arcs upon power cut-off; paired with grid arc chutes, it meets the requirement of breaking 150A heavy current.