The D tripping characteristic is the main selection differentiator. D-curve breakers have a magnetic trip threshold of 10 to 20 times the rated current (In). For this 3 A unit, that means the magnetic trip activates between 30 A and 60 A. That's deliberately high — it avoids tripping on the inrush of small motors, solenoid valves, or transformers where the initial surge can be 8-12x the running current. D is specifically for inductive loads with high starting peaks. In a panel with a transformer rating that limits prospective short-circuit current to under 10 kA, this breaker coordinates cleanly. For higher fault levels (e.g., close to a large transformer), you'd need a higher interrupting rating or a current-limiting upstream device. The DC rating of 72 V max means it's suitable for 48 V or 60 V DC control circuits, but not for 110 V DC battery banks.
Siemens 5SY4203-8CC11 SENTRON MCB, 2-Pole D 3 A, 10 kA
Siemens SENTRON 5SY4203-8CC11 miniature circuit breaker, 2-pole, D tripping characteristic, 3 A rated current, 10 kA breaking capacity at 400 V AC, 72 V DC max, 2 width units (36 mm).
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Application environment | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Width | 36 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Protection degree (IP) | IP20, with connected conductors |
Product details
Frequently asked questions
How do I get current pricing and availability for 5SY4203-8CC11?
Pricing and availability are confirmed at quote time against an RFQ. Submit a request through the distributor channel for a current quote.
What is the difference between 5SY4203-8CC11 and 5SY3132-6?
The 5SY3132-6 is a different rating and curve within the same SENTRON 5SY family. The 5SY4203-8CC11 is a 2-pole D-curve 3 A breaker; the 5SY3132-6 is a different order code with its own rating. They share the same form factor and mounting, but the tripping characteristic and current rating differ — verify your load requirements before substituting.
What is 5SY4203-8CC11's listed depth?
The depth is 76 mm, with an installation depth of 70 mm. Width is 36 mm (2 width units), height is 90 mm.
What conductor sizes does 5SY4203-8CC11 accept?
It accepts solid conductors from 0.75 to 35 mm² and stranded conductors from 0.75 to 35 mm². The screw terminals require a tightening torque of 2.5 to 3.5 N·m.
Will 5SY4203-8CC11 drop into a panel specified for 5SY3132-6 without rewiring?
Both are 2-pole SENTRON breakers on the same 36 mm footprint, so the mechanical fit and busbar connection are identical. However, the electrical ratings (current and tripping curve) differ — confirm the load's inrush and continuous current match the 5SY4203-8CC11's D-curve and 3 A rating before swapping.