1. Producto terminadoview
The ABB S203-B16 is a low voltage, 3-pole miniature circuit breaker designed for equipment protection. It features a 480Y/277 VAC voltage rating, a 16 A amperage rating, and an interrupt rating of 6 kA.
This device incorporates thermal/magnetic trip mechanisms for reliable overcurrent fault protection in various applications, including commercial appliances, control circuits, and computer equipment.

Figura 1: Frente view of the ABB S203-B16 Miniature Circuit Breaker, showing the toggle switch and model markings.
2. Información de seguridad
Always adhere to local electrical codes and regulations during installation and operation. Installation should only be performed by qualified personnel.
- Asegúrese de que la energía esté desconectada antes de la instalación o el mantenimiento.
- No opere el disyuntor si parece estar dañado.
- Utilice equipo de protección personal (EPP) adecuado.
- Refer to the wiring diagrams for correct connections.
3. Configuración e instalación
The S203-B16 circuit breaker is designed for DIN-rail mounting.
- Montaje: Securely attach the circuit breaker to a standard DIN-rail. Ensure the mounting clip engages properly.
- Alambrado: Connect the electrical conductors to the screw terminals. The wire size supported is 18 - 4 AWG for conductors and 18 - 8 AWG for busbars.
- Ajuste de terminales: Asegúrese de que todos los terminales de tornillo estén apretados al torque especificado para evitar conexiones sueltas y sobrecalentamiento.

Figura 2: Posterior view illustrating the DIN-rail mounting mechanism.

Figura 3: Arriba view showing the input terminals of the circuit breaker.

Figura 4: Abajo view showing the output terminals of the circuit breaker.
4. Instrucciones de funcionamiento
The ABB S203-B16 circuit breaker is operated via a toggle actuator.
- Encender: Push the toggle actuator upwards to the "ON" position.
- Apagar: Push the toggle actuator downwards to the "OFF" position.
- Indicación de viaje: In case of an overcurrent or short circuit, the toggle actuator will automatically move to an intermediate "TRIPPED" position.
- Reinicio después del viaje: To reset the circuit breaker after a trip, first move the toggle completely to the "OFF" position, then push it upwards to the "ON" position. Investigate the cause of the trip before resetting.
5. Mantenimiento
The ABB S203-B16 circuit breaker requires minimal maintenance. Regular inspections are recommended to ensure proper function and safety.
- Inspección visual: Inspeccione periódicamente el disyuntor para detectar cualquier signo de daño físico, decoloración o conexiones sueltas.
- Limpieza: If necessary, clean the exterior of the circuit breaker with a dry, lint-free cloth. Do not use abrasive cleaners or solvents.
- Comprobación de terminal: Verify that all terminal connections remain tight.
- Condiciones ambientales: Ensure the operating environment remains within the specified temperature range (-25 to 55 deg C) and IP20 enclosure rating.
6. Solución de problemas
| Problema | Posible causa | Solución |
|---|---|---|
| El disyuntor se dispara con frecuencia. | Overload, short circuit, or faulty appliance/wiring. | Reduce load, check for short circuits, inspect connected equipment and wiring. |
| El disyuntor no se reinicia. | Persistent fault, internal damage. | Ensure the fault is cleared. If it still doesn't reset, the unit may be damaged and require replacement. Consult a qualified electrician. |
| El disyuntor se siente caliente. | Sobrecarga, conexiones sueltas o falla interna. | Reduce load, check terminal tightness, or replace the unit if overheating persists without apparent cause. |
If troubleshooting steps do not resolve the issue, contact a qualified electrician or ABB customer support.
7. Especificaciones
| Característica | Detalle |
|---|---|
| Modelo | S203-B16 |
| Tipo | Vol bajotage Miniature Circuit Breaker |
| Número de polos | 3 |
| Volumentage Calificación | 480Y/277 VCA |
| AmpCalificación de edad | 16 A |
| Clasificación de frecuencia | 50/60 Hz |
| Clasificación de interrupción | 6 kA |
| Tipo de viaje | Thermal/Magnetic |
| Rango de viaje | 3 - 5 A magnético y 1.13 - 1.45 A térmico |
| Tipo de actuador | Palanca |
| Tamaño del cable | Conductor de 18 - 4 AWG, barra colectora de 18 - 8 AWG |
| Tipo de terminal | Tornillo |
| Tipo de recinto | IP20 |
| Tipo de montaje | DIN-Rail |
| Clasificación de temperatura | -25 A 55 grados C |
| Dimensiones | 88 mm Height x 52-1/2 mm Width x 69 mm Depth |
| Material | Plástico moldeado |
| Normas/Aprobaciones | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 |

Figura 5: Lado view displaying product specifications and international certifications.

Figura 6: Lado view showing the product barcode and manufacturing details.
8. Información de garantía
For detailed warranty information regarding your ABB S203-B16 Miniature Circuit Breaker, please refer to the official ABB warranty policy available on the manufacturer's webSitio web o contacte directamente con el servicio de atención al cliente de ABB. Conserve su recibo de compra como comprobante.
9. Atención al cliente
If you require technical assistance, have questions about installation, operation, or maintenance, please contact ABB customer support.
- Oficial de ABB Websitio: www.abb.com
- Apoyo técnico: Refer to the support section on the ABB website for contact numbers and online resources specific to your region.





