Solutions for your safety

One Source - Complete 24 VDC Power Solution

E-T-A Circuit Breakers is pleased to announce the availability of the SMP single and three-phase switch-mode power supplies.

The addition of the SMPs to the product offering allows E-T-A to offer customers a single source for their 24 VDC control system that includes:

  • Switch-mode power supply
  • Power circuit protection
  • Control circuit protection

How does the combination of SMP and overcurrent protection work?

The 4230-T thermal-magnetic MCB protects the primary AC protection of the power supply unit and/or for its supply  lines. Single pole and three pole versions are available, depending on the power supply.

The second part of the selective load protection is provided by an electronic overcurrent protection device with active linear current limitation. The overcurrent protection devices (ESX10-, ESX10-T, ESS30 and ESS31-T) are available with and without physical isolation and can be individually  specified based on the application. An electronic protection device is required because only limited power is available in the event of an overload when using switch-mode power supplies. The max. power factor is only 1.5 times rated current. In theory, this would be exceeded in the event of an overload. The power supply turns down the output voltage to self-protect itself.

In this case, selective load protection means that the electronic overcurrent protection device responds quicker to the overload condition than the power supply. This means: Before the voltage of the power supply unit drops, the electronic circuit protector limits the max. current flow via active linear current limitation and prevents the entire supply from overloading.

24 VDC Power Solution Components

Single Phase Switch-Mode Power Supplies

SMP11 DC24V/10A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 88...264 V
  • Operating voltage range: AC 100...240 V
  • Effective output: 240 W
  • Outut voltage: 24 VDC
  • Output current rating: 10A
Download Datasheet

 

SMP21 DC24V/5A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 90...132 V / AC 180...264 V
  • Operating voltage range: AC 115 / 230 V
  • Effective output: 120 W
  • Outut voltage: 24 VDC
  • Output current rating: 5A
Download Datasheet

 

SMP21 DC24V/10A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 90...132 V / AC 180...264 V
  • Operating voltage range: AC 115 / 230 V
  • Effective output: 240 W
  • Outut voltage: 24 VDC
  • Output current rating: 10A

Download Datasheet

SMP21 DC24V/20A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 90...264 V
  • Operating voltage range: AC 100...240 V
  • Effective output: 480 W
  • Outut voltage: 24 VDC
  • Output current rating: 20A

Download Datasheet

Three Phase Switch-Mode Power Supplies

SMP23 DC24V/10A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 340...575 V
  • Operating voltage range: AC 400...500 V
  • Effective output: 240 W
  • Outut voltage: 24 VDC
  • Output current rating: 10A

Download Datasheet

SMP23 DC24V/20A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 340...575 V
  • Operating voltage range: AC 400...500 V
  • Effective output: 480 W
  • Outut voltage: 24 VDC
  • Output current rating: 20A

Download Datasheet

SMP23 DC24V/40A

  • UL508, UL60950-1, EN6095701
  • Input voltage: AC 340...575 V
  • Operating voltage range: AC 400 V...AC 500 V
  • Effective output: 960 W
  • Outut voltage: 24 VDC
  • Output current rating: 40A
Download Datasheet

Power Circuit Protection

4230-T Thermal-Magentic MCB

  • UL489, UL1077
  • 120-480VAC, 60-125VDC
  • 1-63A
  • 17.5 mm
Download Datasheet

Control Circuit Protection


ESX10 Electronic Circuit Protector

  • UL508, UL1604, UL2367, ATEX, Class I, Division II
  • 12-24VDC
  • .5-12A
  • 12.3 mm
Download Datasheet

 

ESX10-T Electronic Circuit Protector

  • UL508, UL1604, UL2367, ATEX, Class I Div II, CSA & CE
  • 12-24VDC
  • .5-12A
  • 12.5 mm
Download Datasheet

 


ESS30 Electronic Circuit Protector

  • UL1077
  • 24VDC
  • .05-10A
  • 12.3 mm
Download Datasheet

 


ESS31-T Electronic Circuit Protector

  • UL 1077, EN 60934
  • DC 24 V (18...30 V)
  • .5-12A
  • 12.5 mm
Download Datasheet