BOM / RFQ

Siemens 5SY4208-8 — 2-Pole MCB (DIN Rail)

Siemens 5SY4208-8 SENTRON MCB D-Curve 2P

MPN5SY4208-8

Active

Siemens SENTRON 5SY4208-8, miniature circuit breaker, D curve, 2-pole, 400 V AC, 10 kA (IEC 60898-1), 20 kA (IEC 60947-2), 5 kA (UL 1077), width 36 mm, depth 76 mm.

$27.94Ref. price · indicative, final on quote

Add to RFQ

Siemens 5SY4208-8 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4208-8 — Identification
Parameter	Value
Product designation	Miniature circuit breaker
Brand name	SENTRON
Application environment	Mechanical engineering / industry

5SY4208-8 — Electrical
Parameter	Value
Number of poles	2

5SY4208-8 — Protection
Parameter	Value
Tripping characteristic class	D
Overvoltage category	III

5SY4208-8 — Mechanical
Parameter	Value
Modular width units	2
Width	36 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Mounting position	any
Min.	-40 °C
Max.	75 °C
Protection degree (IP)	IP20, with connected conductors

5SY4208-8 — Environmental
Parameter	Value
Pollution degree	3

5SY4208-8 — Specifications
Parameter	Value
At AC rated value	400 V
According to EN 60898 rated value	10 kA
With single-phase operation at AC rated value	440 V

Product details

2-pole D-curve miniature circuit breaker for industrial load protection

The 5SY4208-8: Rated for mechanical engineering and industrial environments, with an ambient temperature range of -40 °C to 75 °C and vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Production status and compliance documentation

The part carries a current lifecycle status, so it is a standard lead-time item available against an RFQ. The sealable design allows tamper-proof installation where required.

IP20 protection with connected conductors keeps the busbar area clean in industrial enclosures. Neutral conductor is not switched; this is a 2-pole MCB switching both phases only. Humidity derating applies per: max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C.