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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 | Meaning |
| 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 normalerweise offen + 1 normalerweise geschlossen |
| 13/25 | Coil voltage code: 13 = 380-400VAC, 25 = 220-240VAC |
| 380V50/60HZ | Rated coil voltage and frequency |
III. Technische Kernparameter
- Elektrische Parameter
| Parameterelement | Wert | Remarks |
| Nennbetriebsstrom (AC-3, 400V) | 38A | Controlled motor power: 18.5kW (50Hz) / 20hp (60Hz) |
| Nennbetriebsstrom (AC-1, 400V) | 50A | Resistive load |
| Bemessungsisolationsspannung (Ui) | 690V | IEC standard |
| Nennarbeitsspannung (Ue) | 400V (AC-3), 690V (AC-1) | |
| Control Coil Voltage | 220-240VAC, 380-400VAC, 110VAC, 24VAC/DC, usw. | 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 |
- Physikalische Eigenschaften
| Parameterelement | Wert |
| Montagemethode | DIN rail mounting (35mm standard rail), slider design for one-hand disassembly |
| Overall Dimensions (mm) | Approximately 85×105×55 (Width × Height × Depth) |
| Weight | Approximately 0.5kg |
| Schutzklasse | IP20 (main body), IP00 for terminal blocks |
| Umgebungstemperatur | -25℃~+55℃ (operation), -40℃~+85℃ (storage) |
| Pollution Degree | Degree 3 |
- Core Product Features
- Kompaktes Design: Small size, sparen 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 (bis zu 4 units), mechanical interlocks, time-delay heads and surge suppressors can be added.
- Typische Anwendungsszenarien
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 | Spulenspannung | Auxiliary Contacts | Ordering Code | Status |
| A2X38-30-01 380V | 380VAC | 0 normalerweise offen + 1 normalerweise geschlossen | 10221469 | Discontinued |
| A2X38.2-30-11-13 | 380-400VAC | 1 normalerweise offen + 1 normalerweise geschlossen | 10242059 | Currently in Production |
| A2X38.2-30-11-25 | 220-240VAC | 1 normalerweise offen + 1 normalerweise geschlossen | 10242060 | Currently in Production |
| A2X38.2-30-00-13 | 380-400VAC | No auxiliary contacts | 10242058 | Currently in Production |
VII. Installation and Wiring Specifications
Installationsschritte:
- 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
| Fehlerphänomen | Mögliche Ursachen | Lösungen |
| Contactor fails to pull in | No voltage/low voltage on coil; Durchbrennen der Spule; 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; Lose Verkabelung | Check load current; Polish contacts or replace them; Re-tighten terminal blocks |
| Auxiliary contact failure | Contact wear; Verdrahtungsfehler | Replace auxiliary contact module; Check wiring polarity |
- Safety and Maintenance Precautions
- Power-off Operation: Cut off all power supplies before installation and maintenance, and hang the “No Switching On” sign.
- Regelmäßige Inspektion: Conduct inspection every 6 months, 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.
- Umweltanforderungen: 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.
