ABB S5N300TDDAS8 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
ABB S5N300TDDAS8 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Delivering heavy-duty performance, this 300-amp Isomax S5 breaker includes adjustable thermal and magnetic trip settings for precise load tuning. The integrated shunt trip and auxiliary switch allow for remote tripping and status monitoring in complex industrial setups. This unit mounts into ABB SACE Isomax switchboards and enclosures utilizing standard lug terminals. It serves as a comprehensive replacement for aging infrastructure before transitioning to the newer T5S300TW series.Specifications
| Brand | ABB |
|---|---|
| Part Number | S5N300TDDAS8 |
| Series | S5N |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB SACE Isomax S5 Enclosures and Switchboards |
| Wire Gauge | (2) 3/0 AWG - 250 kcmil |
| Max Wire | 250 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Undervoltage Release, Rotary Handle, Terminal Shields, Phase Barriers, Lugs |
|---|---|
| Accessories | Shunt Trip, Auxiliary Switch |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersCan this breaker be installed in standard DIN rail enclosures?
No, the S5N300TDDAS8 is a unit mount breaker designed specifically for bolt-on installation in ABB SACE Isomax S5 enclosures and switchboards. It is not compatible with standard DIN rail mounting.
How does the adjustable LI trip unit function on the S5N300TDDAS8?
The thermal-magnetic LI trip unit allows electricians to independently adjust both the Long-Time (thermal) overload protection and the Instantaneous (magnetic) short-circuit protection. This dual adjustability ensures precise coordination with specific motor loads and downstream devices.
How many conductors can the standard lugs on this breaker accommodate?
The factory lugs on this 300A breaker are designed to accept two separate conductors per phase. Each conductor can range in size from 3/0 AWG up to 250 kcmil.
Is the ABB SACE Isomax S5 series still in active production?
The SACE Isomax S series is a legacy product line. For new installations or comprehensive infrastructure upgrades, ABB has transitioned to the newer Tmax T5 series, such as the T5S300TW.
Does the S5N300TDDAS8 include any factory-installed accessories?
Yes, this specific configuration includes an integrated shunt trip and an auxiliary switch. These accessories enable remote tripping capabilities and status monitoring for complex industrial control systems.
What safety verification is required before installing this Isomax S5 breaker?
Before installation, electricians must verify that the available fault current at the panel does not exceed the breaker's maximum interrupting capacity, which is 65kA at 240VAC, 35kA at 480VAC, or 22kA at 600VAC. Always ensure the system is fully de-energized and locked out prior to mounting.
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