Square D | T401LA | Circuit Breaker | 40A | 1-Pole | 240V

Meet the Square D T401LA circuit breaker—a precise, dependable solution built for maintenance, retrofit, and replacement projects that require exact specifications. Identified by the exact part number T401LA, this 40A, 1-pole, 240V unit is designed to protect individual circuits with consistent performance. Remember: confirm fit and ratings before ordering, and use the part number as your best reference for compatibility.

Key specifications

• Amperage: 40A
• Poles: 1-Pole
• Voltage: 240V
• Part number: T401LA

Why this model matters

The T401LA is purpose-built for situations where a precise, single-pole 40A 240V breaker is required. By using the exact part number for compatibility, you minimize the guesswork that can lead to mismatched panels or improper protection. This makes it an ideal choice for reliable maintenance, thoughtful retrofits, and straightforward replacement tasks where stock and specifications line up with your existing setup.

Ideal use cases

• Regular maintenance: swap in a like-for-like 40A 240V breaker to restore circuit protection without panel modifications.
• Retrofits: replace aging or failed breakers in systems designed for 1-pole, 240V protection, ensuring continued performance.
• Repairs and replacements: when a circuit requires dedicated 40A protection in a single leg, the T401LA provides a precise fit.

How to verify compatibility and install

Before purchasing, double‑check that your panel accepts a T401LA and that the circuit requires 40A, 1-Pole, 240V protection. The part number is the most reliable reference for matching against your equipment labeling and documentation. For installation, follow local electrical codes and the manufacturer’s guidelines, ensuring the main power is off and the circuit is safely tested after replacement.