1SDA055413R1 ABB T4N 250 PR221DS-LS/I Moulded Case Circuit Breaker is a Tmax series circuit breaker identified by its complete ABB ordering reference.
This model combines the T4N breaker frame with a PR221DS-LS/I trip unit configuration, defining the protection characteristics and electrical specification of the device. The full part number is essential when matching an existing ABB Tmax installation, as the same frame family includes multiple trip units, current ratings, and accessory combinations.
For industrial spare-part purchasing, the breaker reference is normally verified together with the installed trip unit and frame designation to ensure the correct replacement component.
Product Data
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Article Number | 1SDA055413R1 |
| Product Family | Tmax |
| Series | T4N |
| Product Type | Moulded Case Circuit Breaker |
| Frame Size | T4N |
| Rated Current | 250 A |
| Trip Unit | PR221DS-LS/I |
| Poles | 3 Pole |
| Protection Function | Long Time / Short Time / Instantaneous |
| Installation Type | Fixed Mounting |
| Connection Type | Front Terminals |
| Application Category | Low Voltage Circuit Protection |
Identification Details
ABB Tmax MCCBs are normally identified through several combined references rather than the product family name alone.
For 1SDA055413R1, the important identification elements include:
| Reference | Meaning |
|---|---|
| Tmax T4N | Breaker frame family |
| 250 | Frame current class |
| PR221DS-LS/I | Electronic trip unit configuration |
| 1SDA055413R1 | Complete ABB ordering code |
Different Tmax T4 versions may appear similar externally while having different:
- trip releases;
- breaking capacities;
- rated currents;
- pole configurations;
- accessories.
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Electrical Characteristics
| Parameter | Details |
|---|---|
| Circuit Breaker Type | MCCB |
| Frame Class | T4N |
| Rated Current In | 250 A |
| Trip Technology | Electronic Trip Unit |
| Trip Release | PR221DS-LS/I |
| Protection Functions | LSI |
| Frequency | 50/60 Hz |
| Network Type | Low Voltage AC Systems |
Trip Unit Configuration
The PR221DS-LS/I trip unit defines the protection arrangement installed on this ABB breaker.
| Function | Description |
|---|---|
| L | Long Time Overload Protection |
| S | Short Time Protection |
| I | Instantaneous Protection |
The trip unit reference should be considered when replacing an MCCB because different Tmax breakers may use different protection releases even within the same frame family.
Tmax T4N Series Position
ABB Tmax molded case circuit breakers are available in multiple frame sizes and configurations.
The T4N series may differ according to:
| Category | Possible Variations |
|---|---|
| Current Rating | Different ampere classes |
| Trip Release | Thermal-magnetic or electronic versions |
| Pole Configuration | 3P / 4P versions |
| Accessories | Auxiliary contacts, shunt trips, undervoltage releases |
| Installation Type | Fixed or withdrawable versions |
The 1SDA055413R1 represents a specific Tmax T4N configuration rather than a generic T4 breaker.
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