Description
E-T-A 4230-T Thermal-Magnetic Miniature Circuit Breaker
The E-T-A 4230-T is a premium DIN rail-mounted thermal-magnetic miniature circuit breaker (MCB) engineered to provide superior overcurrent and short-circuit protection across challenging industrial, marine, and hazardous-area control environments. Designed with a positively trip-free snap-action mechanism and visual status indication, it delivers reliable switching behavior and high rupture capacity (up to 10 kA) for critical electrical infrastructure.
Built for field performance and versatile integration, the 4230-T features a broad operating temperature range (-35 °C to +70 °C), IP20 finger-safe terminal protection, and high resistance to shock, vibration, and salt mist corrosion. It supports multiple trip curves (B, C, and D) across 1-pole, 2-pole, 3-pole, and 4-pole configurations, and easily integrates with add-on modules such as auxiliary switches, fault indicators, and shunt trips for advanced remote monitoring and control.
Key Features:
✅ International Approvals: IEC/EN 60947-2, UL 1077 / CSA-C22.2 No. 235, UL 489 / CSA-C22.2 No. 5
✅ Wide Current Range: Available ratings from 1 A up to 63 A
✅ Voltage Ratings: Up to AC 415 V / DC 125 V (IEC/EN) and AC 480Y/277 V / DC 125 V (UL)
✅ High Rupture Capacity: Up to 10 kA short-circuit breaking capacity
✅ Trip Characteristics: Curve B (3.2–4.8 x In), Curve C (4.8–9.6 x In), and Curve D (9.6–14.4 x In)
✅ Robust Environmental Resistance: IP20 degree of protection, 30g shock resistance, 5g vibration resistance, and 96-hr salt mist corrosion testing
✅ Safety Mechanism: Positively trip-free snap-action mechanism with clear visual status indication toggle
✅ Add-On Modular Support: Optional auxiliary contacts (X4230-S), fault indicators (X4230-A), working current/shunt trip modules (X4230-FA), and busbars
✅ Extreme Operating Range: Operates reliably in ambient temperatures from -35 °C to +70 °C
📦 Package Options:
🔹 1-Pole (Single Pole): AC 240 V / DC 80 V (IEC), AC 277 V / AC 120 V / DC 60 V (UL)
🔹 2-Pole (Double Pole): AC 415 V / DC 125 V (2 poles in series) (IEC/UL)
🔹 3-Pole (Three Pole): AC 415 V (IEC), AC 480Y/277 V / AC 240 V (UL)
🔹 4-Pole (Four Pole): AC 415 V (IEC/EN 60947-2 & UL 1077 versions only)
E-T-A 4230-T Technical Specifications:
| Feature | Details |
|---|---|
| Product Type | Thermal-Magnetic Miniature Circuit Breaker (MCB) |
| Mounting Type | 35 mm DIN Rail Mounting |
| Pole Configurations | 1-Pole, 2-Pole, 3-Pole, 4-Pole (4-pole non-UL 489) |
| Current Ratings | 1 A, 2 A, 3 A, 4 A, 5 A, 6 A, 7 A, 8 A, 10 A, 12 A, 13 A 15 A, 16 A, 20 A, 25 A, 30 A, 32 A, 35 A, 40 A, 50 A, 60 A, 63 A |
| Trip Curves | Curve B (3.2-4.8 x In), Curve C (4.8-9.6 x In) Curve D (9.6-14.4 x In) |
| Rated Voltage (IEC/EN 60947-2) | 1-pole: AC 240 V / DC 80 V; 2/3/4-pole: AC 415 V 2-pole in series: DC 125 V |
| Rated Voltage (UL 1077) | 1-pole: AC 277 V / DC 60 V; 2/3/4-pole: AC 480Y/277 V 2-pole in series: DC 125 V |
| Rated Voltage (UL 489) | 1-pole: AC 120/277 V / DC 60 V; 2/3-pole: AC 240/480Y/277 V 2-pole in series: DC 125 V |
| Rupture / Short-Circuit Capacity | Up to 10,000 A (10 kA) AC/DC |
| Ingress Protection Rating | IP20 |
| Operating Temperature Range | -35 °C to +70 °C (-31 °F to +158 °F) |
| Mechanical Life | 20,000 operations |
| Electrical Life | 6,000 operations |
| Termination | Screw Terminals (max torque 2 Nm / stripping length 14 mm) |
| Max Cable Cross Section | ≤ 35 mm² |
| Shock & Vibration Resistance | Shock: 30g (11 ms); Vibration: 5g (57-500 Hz), ±0.38 mm (10-57 Hz) |
| Corrosion & Humidity Testing | 96 hrs in 5% salt mist; 48 hrs at 95% RH (+40 °C) |
| Approximate Weight | 116 g per pole (IEC/UL 1077); 131 g per pole (UL 489) |
| Optional Add-On Modules | Auxiliary contact (X4230-S), Fault indicator (X4230-A) Working current/Shunt trip (X4230-FA), Busbars |
Certifications & Compliance:
🔗 IEC / EN 60947-2 – Low-voltage switchgear and controlgear circuit breakers (TÜV certified)
🔗 UL 489 / CSA-C22.2 No. 5 – Molded-case circuit breakers for branch circuit protection
🔗 UL 1077 / CSA-C22.2 No. 235 – Supplementary protectors for use in electrical equipment
🔗 IEC 60068-2-6 / 27 / 11 / 78 – Shock (30g), vibration (5g), salt mist (96h), and humidity testing compliance
🔗 Ingress Protection: IP20 – Touch-safe terminal protection against solid objects
🔗 Download Datasheet
Applications of E-T-A 4230-T:
🔹 Oil & Gas Field Control & Distribution Panels
🔹 Chemical & Petrochemical Processing Plants
🔹 Industrial Process Control Systems & Automation
🔹 Marine, Mining, and Heavy Industry Power Equipment
🔹 Telecommunications & Power Supply Systems
What’s in the Box?
📦 1x E-T-A 4230-T Miniature Circuit Breaker (Selected Pole / Ampere / Characteristic Configuration)
📦 1x Installation & Safety Leaflet Kit
Ordering & Shipping Details
📦 Lead Time: 6 – 7 weeks
📍 Shipping Terms: Worldwide shipping with expedited freight options available.
💳 Payment Options: Credit Card, PayPal, Net 30 Terms available for qualified accounts.
Related Products:
🔗 E-T-A X4230-S Auxiliary Contact Module
🔗 E-T-A X4230-A Fault Indicator Module
🔗 E-T-A X4230-FA Shunt Trip / Working Current Module
FAQs:
Is the E-T-A 4230-T suitable for DC applications?
Yes. The 4230-T can be used in DC applications without needing to observe polarity, supporting up to DC 80 V for single-pole and DC 125 V for 2 poles connected in series.
What trip characteristics are available for this MCB?
The series offers three trip curves: Curve B (thermal 1.05–1.30 x In; magnetic 3.2–4.8 x In), Curve C (thermal 1.05–1.30 x In; magnetic 4.8–9.6 x In), and Curve D (thermal 1.05–1.30 x In; magnetic 9.6–14.4 x In).
Can I add remote status indication or trip control to the 4230-T?
Yes. You can add snap-on modules to the left side of the breaker, including auxiliary contact modules (X4230-S), fault indicator modules (X4230-A), and working current modules (X4230-FA) for remote electrical tripping.
What is the difference between the UL 1077 and UL 489 approvals?
The UL 489 version is certified for branch circuit protection (up to 3-pole configurations), while the UL 1077 version is certified as a supplementary protector for equipment internal protection (available in up to 4-pole configurations).
