ABB S400 series SMISSLN MCB, S403M-D32, 3-pole, 32 A, D trip curve, 240 VAC, 10 kA interrupting capacity, DIN rail mount.
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Parameter | Value |
|---|---|
| Voltage (AC) | 240 |
| Current (A) | 32 |
| Parameter | Value |
|---|---|
| Interrupting rating (AC) | 10 kA |
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
| Parameter | Value |
|---|---|
| Type | Trip Curve D |
| Family (Style) | S400 |
The ABB S403M-D32 is a 3-pole SMISSLN miniature circuit breaker from the S400 family, rated 32 A with a D trip curve and 10 kA interrupting capacity at 240 VAC.
Snaps onto standard DIN rail — no tools beyond a screwdriver for the terminals. The 3-pole footprint matches any standard MCB slot in a distribution board or control panel. If you're swapping an existing unit, verify the busbar pitch lines up; the S400 series uses the same 18 mm per pole spacing as most European-spec MCBs.
This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position.
The S403M-D32 carries a 10 kA interrupting capacity at 240 VAC. That's the maximum fault current it can safely clear without failing — verify your panel's available fault current stays under that figure.
The D trip curve means the magnetic trip threshold is set at 10–20 times the rated current (320–640 A for this 32 A unit). It's designed for loads with high inrush — motors, transformers, welding equipment — where a B or C curve would nuisance-trip on startup.
No — the S803S-D63 is a 63 A unit with 50 kA interrupting capacity, a different physical frame size, and different busbar spacing. The S403M-D32 is a 32 A, 10 kA device in the S400 platform; they are not drop-in interchangeable. Check the panel's fault current and load requirements before substituting.