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Basic Overview
ABB A2X38/A2X38.2 is a 3-pole AC contactor belonging to the ABB Formula series. A2X38 is an earlier model (discontinued), while A2X38.2 is its upgraded replacement (currently in production). It is mainly used for controlling three-phase squirrel-cage motors and other power loads, and is suitable for industrial automation and building electrical systems. Ordering Code: 2TFC200010R2511
- Model Code Explanation
| Model Segment | Significado |
| A2X | Formula series contactor with compact and cost-effective design |
| 38 | Rated operating current of 38A (AC-3, 400V) |
| 0.2 | Second-generation upgraded version (improved type) |
| 30 | 3-pole main contacts, normally open configuration |
| 11 | Auxiliary contact configuration: 1 normalmente aberto + 1 normalmente fechado |
| 13/25 | Coil voltage code: 13 = 380-400VAC, 25 = 220-240VAC |
| 380V50/60HZ | Rated coil voltage and frequency |
III. Parâmetros técnicos principais
- Electrical Parameters
| Parameter Item | Value | Remarks |
| Corrente operacional nominal (AC-3, 400V) | 38UM | Controlled motor power: 18.5kW (50Hz) / 20hp (60Hz) |
| Corrente operacional nominal (AC-1, 400V) | 50UM | Carga resistiva |
| Tensão nominal de isolamento (interface do usuário) | 690V | IEC standard |
| Tensão nominal de trabalho (Ué) | 400V (AC-3), 690V (AC-1) | |
| Control Coil Voltage | 220-240VAC, 380-400VAC, 110VAC, 24VAC/DC, etc.. | Multiple options available |
| Coil Frequency | 50/60Hz | Universal design, no adjustment required |
| Mechanical Service Life | ≥10 million operations | |
| Electrical Service Life (AC-3) | ≥1 million operations | Under rated load |
- Características Físicas
| Parameter Item | Value |
| Mounting Method | DIN rail mounting (35mm standard rail), slider design for one-hand disassembly |
| Dimensões Gerais (milímetros) | Approximately 85×105×55 (Width × Height × Depth) |
| Peso | Approximately 0.5kg |
| Classe de Proteção | IP20 (main body), IP00 for terminal blocks |
| Temperatura ambiente | -25℃~+55℃ (operation), -40℃~+85℃ (storage) |
| Pollution Degree | Degree 3 |
- Core Product Features
- Compact Design: Small size, saving 30% of installation space, suitable for high-density distribution cabinets.
- High Efficiency and Reliability: Silver alloy contacts with arc resistance, low contact resistance and long service life.
- Easy Installation: Quick snap-on fixing, auxiliary contact modules can be directly clipped without tools.
- Safety Assurance: Flame-retardant engineering plastic housing complying with UL94 V0 standard, built-in surge suppression (for some models).
- Modular Expansion: Accessories such as auxiliary contacts (up to 4 unidades), mechanical interlocks, time-delay heads and surge suppressors can be added.
- Cenários típicos de aplicação
Direct start and stop control of three-phase asynchronous motors (≤18.5kW/400V)
Electrical control of equipment such as fans, water pumps and compressors
Switch control of non-motor loads such as heating and lighting systems
Building electrical systems and industrial automation production lines
Replacement of old contactors for equipment upgrading and transformation
- Complete Model and Ordering Information
| Complete Model | Coil Voltage | Contatos Auxiliares | Ordering Code | Status |
| A2X38-30-01 380V | 380VAC | 0 normalmente aberto + 1 normalmente fechado | 10221469 | Discontinued |
| A2X38.2-30-11-13 | 380-400VAC | 1 normalmente aberto + 1 normalmente fechado | 10242059 | Currently in Production |
| A2X38.2-30-11-25 | 220-240VAC | 1 normalmente aberto + 1 normalmente fechado | 10242060 | Currently in Production |
| A2X38.2-30-00-13 | 380-400VAC | No auxiliary contacts | 10242058 | Currently in Production |
VII. Installation and Wiring Specifications
Etapas de instalação:
- Confirm that the installation environment meets the range of -25℃~+55℃, free from severe vibration and corrosive gases.
- Select a 35mm standard DIN rail and ensure the mounting surface is flat.
- Align the contactor’s snap with the rail, press down and slide to fix (one-hand operation).
- Cut off all power supplies before wiring, and use a multimeter to confirm no voltage exists.
- Main circuit wiring: L1/L2/L3 → input terminals, T1/T2/T3 → output terminals.
- Control circuit wiring: A1/A2 → coil power supply, 13/14 → normally open auxiliary contacts, 21/22 → normally closed auxiliary contacts.
- After wiring is completed, gently pull the wires to confirm they are connected firmly without loosening.
Terminal Block Specifications:
Main circuit: M6 bolts, suitable for copper core wires with cross-sectional area of 1.5-16mm²
Control circuit: M3.5 bolts, suitable for copper core wires with cross-sectional area of 0.5-2.5mm²
VIII. Replacement Models and Compatibility
| Original Model | Direct Replacement Model | Upgraded Replacement Series | Remarks |
| A2X38 | A2X38.2 | AF38 Series | A2X38.2 is fully compatible with A2X38 in terms of installation dimensions and electrical performance |
| A2X38.2 | AF38-30-xx-xx | AF Series | AF series has advantages such as electronic coil (wide voltage range) and built-in surge suppression |
| AX38-30-xx | AX Series | Equivalent performance with slightly higher price |
- Troubleshooting Guide
| Fenômeno de falha | Possíveis causas | Soluções |
| Contactor fails to pull in | No voltage/low voltage on coil; Coil burnout; Mechanical jamming | Check the control circuit; Measure coil resistance (approximately several hundred ohms under normal condition); Clean foreign objects and lubricate moving parts |
| Excessive noise after pull-in | Low coil voltage; Oil stain/rust on iron core end face; Broken short-circuit ring | Adjust control voltage to rated value; Clean iron core end face; Replace coil assembly |
| Contact overheating/ablation | Load overload; Poor contact of contacts; Loose wiring | Check load current; Polish contacts or replace them; Re-tighten terminal blocks |
| Auxiliary contact failure | Contact wear; Wiring error | Replace auxiliary contact module; Check wiring polarity |
- Safety and Maintenance Precautions
- Operação de desligamento: Cut off all power supplies before installation and maintenance, and hang the “No Switching On” sign.
- Inspeção Regular: Conduct inspection every 6 meses, including contact wear, terminal tightness and coil temperature.
- Contact Replacement: Replace the main contacts in time when the wear amount exceeds 1mm or the surface is severely ablated.
- Requisitos Ambientais: Avoid use in humid and dusty environments; install a protective housing if necessary.
- Compatible Accessories: Only use auxiliary contacts, interlock devices and other accessories original or certified by ABB to ensure safety performance.
