The Siemens 5SY4120-7 is described by Siemens as: Miniature circuit breaker 230/400 V 10kA, 1-pole, C, 20 A, D=70 mm.
SENTRON 5SY miniature circuit breakers protect cables and loads against overload and short circuit in industrial and building distribution boards.
See our Siemens range.
Technical data
| Siemens order number | 5SY4120-7 |
|---|---|
| Dimensions (W x H x D) | 18 x 90 x 76 mm |
| Weight, approx. | 0.153 kg |
| Condition | New, original Siemens |
Key features (per Siemens)
- Miniature circuit breaker 230/400 V 10kA
- 1-pole
- 20 A
- D=70 mm
Typical applications
- Replacing a damaged breaker
- Machine power circuits
- Control panel protection
- Distribution boards
Compatibility and replacement
Match the number of poles, the rated current, the tripping characteristic and the breaking capacity to the old breaker.
What to check first
- Check the mounting (DIN rail or screw fixing) and the terminal type (screw or spring-loaded) of the old unit.
- Check the supply voltage and wiring of the old unit before installing the new one.
- Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.
Frequently asked questions
Does it fit a standard DIN rail?
Yes, 35 mm DIN rail.
What is the breaking capacity?
See the rated short-circuit breaking capacity in the Siemens table above.
Do you supply larger quantities for projects?
Yes. For panel builders and plant projects we quote complete lists; send the bill of materials on WhatsApp or through the inquiry form.
Can you help me identify the right replacement?
Yes. Send us a photo of the label of the old part, or its full order number, and we will confirm the exact match or the official successor before quoting.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
How to order
Message us the order number and quantity. For breakdowns, tell us the delivery address and we will offer the fastest shipping option. If the exact part is discontinued, we confirm the official successor before quoting.
Need it fast? Send the order number, quantity and delivery country on WhatsApp or through the inquiry form and we reply with a quotation the same working day. All parts are new and original, covered by a 1-year warranty, and ship worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Local agents: Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
