Siemens 6EP3437-8SB00-0AY0 SITOP PSU8200 24 V 40 A Three-Phase Power Supply

Overview

SIEMENS SITOP PSU8200

6EP3437-8SB00-0AY0 SITOP PSU8200 24 V 40 A Three-Phase Power Supply

Three-phase AC power supply with a nominal 24 V DC, 40 A output, adjustable DC voltage and a relay contact for power-status monitoring.

At a Glance

Brand	Siemens
Model	6EP3437-8SB00-0AY0
Product Type	Stabilized power supply
Core Function	Regulated DC power for industrial control circuits
Compatible Series / Application	Industrial control cabinets

Three-phase input

Nominal 400–500 V AC input with a wide operating range.

DC output

24 V DC at 40 A, adjustable up to 28 V within 960 W.

Status monitoring

Green 24 V OK LED and a normally open relay contact.

Product Overview

6EP3437-8SB00-0AY0 converts three-phase AC power into a regulated, isolated DC supply for industrial control equipment through the SITOP PSU8200 platform.

The 24 V DC, 40 A output can be adjusted with a potentiometer, while a green LED and relay output provide local and remote power-status indication.

Ordering focus: Match the three-phase input, connected DC load and feeder protection, including the output power limit when increasing the voltage setting.

Key Functions

Wide input operation

The input accepts nominal 400–500 V three-phase AC and operates from 320 to 575 V.

Adjustable isolated output

The output is adjustable from 24 to 28 V DC with a maximum power of 960 W.

Power-status signaling

A normally open relay contact rated 60 V DC at 0.3 A signals 24 V OK.

Official Specifications

Nominal AC input	400–500 V; three-phase
AC operating input range	320–575 V
Permissible mains frequency	45–65 Hz
Input current at 400 V	2.1 A
Input current at 500 V	1.7 A
Maximum inrush at 25 °C	13 A
Maximum I²t	2.24 A²·s
Nominal DC output	24 V at 40 A
Adjustable output	24–28 V DC; maximum 960 W
Static overall voltage tolerance	±3%
Static line regulation	Approximately 0.1%
Static load regulation	Approximately 0.2%
Maximum residual ripple	100 mV
Maximum voltage peaks	240 mV
Minimum mains buffering	10 ms at 400 V input and rated output current
24 V OK signal contact	Normally open relay; 60 V DC, 0.3 A

Official source:Siemens technical specifications and product manual

Frequently Asked Questions

Can I feed 6EP3437-8SB00-0AY0 from a single-phase supply?

This version is designed for a three-phase 400–500 V AC supply.

Can I raise the output of 6EP3437-8SB00-0AY0 above 24 V?

The potentiometer adjusts the output from 24 to 28 V DC while total output power remains limited to 960 W.

How can I monitor 6EP3437-8SB00-0AY0 from a control system?

A normally open 24 V OK relay contact provides remote status signaling at up to 60 V DC and 0.3 A.

Does 6EP3437-8SB00-0AY0 include an internal input fuse?

The unit has no internal fuse and requires suitable feeder protection.

Which feeder protection can I use for 6EP3437-8SB00-0AY0?

One specified option is a linked three-pole 10–16 A miniature circuit breaker with characteristic C.

How much mains interruption can 6EP3437-8SB00-0AY0 bridge?

At a 400 V input and rated output current, the minimum buffering time is 10 ms.

What ripple level can I expect from 6EP3437-8SB00-0AY0?

Residual ripple is limited to 100 mV and voltage peaks to 240 mV.

Compatibility & Ordering Notes

Before ordering 6EP3437-8SB00-0AY0: Match the three-phase supply and DC load to this 40 A PSU8200 version, and include the required feeder protection in the cabinet design.

Compatibility Checklist for 6EP3437-8SB00-0AY0

• Use the rated 400–500 V AC three-phase input and applicable protective devices.
• Keep output demand within 960 W when adjusting above 24 V.
• Limit the 24 V OK monitoring circuit to the relay contact rating.
• For replacement of 6EP1437-3BA10, match the cabinet wiring and installation arrangement to this successor.

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