BOM / RFQ

Siemens 5SY4420-5 — 4-Pole MCB (DIN Rail)

Siemens 5SY4420-5 SENTRON MCB, 4-pole 20 A, Characteristic A

MPN5SY4420-5

Active

Siemens SENTRON 5SY4, Miniature circuit breaker, 5SY4420-5, 4-pole, 20 A, tripping characteristic A, 400 V AC, 10 kA per EN 60898, 20 kA per IEC 60947-2.

$341.20Ref. price · indicative, final on quote

Add to RFQ

Siemens 5SY4420-5 datasheet (PDF)

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

Specifications

5SY4420-5 — Identification
Parameter	Value
Type / order code	5SY4
Brand name	SENTRON
Application suitability	Mechanical engineering / industry

5SY4420-5 — Ratings
Parameter	Value
Number of poles	4
Pole configuration	4P
Rated current (In), AC	400 V
Rated current (In), AC	20 A
Rated voltage, AC (multi-phase)	440 V
Rated voltage, AC (single-phase)	440 V
Rated voltage, DC (max.)	72 V
Voltage type	AC
Rated frequency	50/60 Hz

5SY4420-5 — Protection
Parameter	Value
Tripping characteristic (trip curve)	A
Rated breaking capacity (Icn), per EN 60898	10 kA
Rated breaking capacity, per IEC 60947-2	20 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)	5 kA
Overvoltage category	III
Degree of protection (IP)	IP20, with connected conductors
Neutral conductor switching	No
Touch protection	Yes

5SY4420-5 — Mechanical
Parameter	Value
Width in modular units	4
Width	72 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Mounting position	any
Combined terminal, top	Yes
Combined terminal, bottom	Yes
Tightening torque, max.	75 °C
Tightening torque, min.	-40 °C
Sealable	Yes

5SY4420-5 — Environmental
Parameter	Value
Halogen-free	Yes
Silicone-free	Yes
Influence of ambient temperature (derating)	max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

5SY4420-5 — Performance
Parameter	Value
Mechanical service life (switching cycles, typ.)	10 000

Product details

Breaking capacity and compliance

The 5SY4420-5: Tripping characteristic A. Neutral conductor not switched.

Physical fit and peer similarity

Width is 72 mm (4 width units), depth 76 mm, installation depth 70 mm — standard for the 5SY4 family. The footprint is identical to peers 5SY4463-8, 5SY4350-5, and 5SY4406-7, so swapping across those ratings within the same panel layout is possible provided the electrical ratings match the application. IP20 protection with connected conductors; halogen-free and silicon-free construction. Operating temperature range -40 °C to 75 °C, derated at high humidity according to the curves (95% RH up to 55 °C, 55% up to 70 °C, 35% up to 75 °C).

Frequently asked questions

Will the 5SY4420-5 physically replace a 5SY4463-8 in an existing panel?

Yes, both are 4-pole 5SY4 breakers with identical dimensions (72 mm width, same mounting depth). The electrical ratings differ — verify the load current and trip curve required before swapping.