steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 months ago
0903026
Phoenix Contact 0903026 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Phoenix Contact 0903026, model EC-E1 4A, is an electronic circuit breaker designed for selective protection of 24 V DC load circuits supplied by switched-mode power supplies. With a nominal current rating of 4 A and an operating voltage range of 18–32 V DC, it combines active electronic current limitation with overload shutdown to protect individual circuits and reduce the effect of faults on the upstream power supply. An integrated volt-free normally open contact enables remote status indication.
The compact black housing measures 12.5 mm wide, 83 mm high and 80 mm deep, and mounts onto a standard 35 mm DIN rail. Screw connections accommodate solid and flexible conductors from 0.5 to 16 mm², with smaller limits applying when ferrules are used. Rated IP20, the unit operates at ambient temperatures from 0°C to 50°C in non-condensing conditions. An integrated failsafe element removes the need for a separate backup fuse.
The compact black housing measures 12.5 mm wide, 83 mm high and 80 mm deep, and mounts onto a standard 35 mm DIN rail. Screw connections accommodate solid and flexible conductors from 0.5 to 16 mm², with smaller limits applying when ferrules are used. Rated IP20, the unit operates at ambient temperatures from 0°C to 50°C in non-condensing conditions. An integrated failsafe element removes the need for a separate backup fuse.
| Specification | Description |
|---|---|
| Manufacturer | Phoenix Contact |
| Part Number | 0903026 |
| Model | EC-E1 4A |
| Product Type | Electronic circuit breaker |
| Product Description | Compact, single-channel electronic circuit breaker for selective protection of 24 V DC load circuits. Combines active current limitation with overload shutdown to isolate electrical faults and reduce their impact on the upstream power supply. |
| Nominal Current | 4 A |
| Rated Operating Voltage | 24 V DC |
| Operating Voltage Range | 18–32 V DC |
| Protection Functions | Electronic overload protection and short-circuit current limitation |
| Signal Contact | One normally open, potential-free contact for remote status indication |
| Typical Quiescent Current | 25 mA ±5 mA when switched on |
| Rated Surge Voltage | 0.5 kV |
| Integrated Protection Element | Built-in failsafe element; no additional backup fuse required |
| Mounting | 35 mm DIN rail |
| Connection Method | Screw terminals |
| Solid Conductor Cross-Section | 0.5–16 mm² |
| Flexible Conductor Cross-Section | 0.5–16 mm² |
| Flexible Conductor with Ferrule | 0.5–10 mm², with or without a plastic sleeve |
| Conductor Size Range | 20–6 AWG |
| Stripping Length | 10 mm |
| Terminal Screw Thread | M4 |
| Maximum Tightening Torque | 1.2 Nm |
| Width | 12.5 mm |
| Height | 83 mm |
| Depth | 80 mm |
| Height on NS 35/15 DIN Rail | 90.5 mm |
| Housing Protection Rating | IP20 |
| Operating Ambient Temperature | 0–50 °C, non-condensing |
| Pollution Degree | 2 |
| Housing Flammability Rating | UL 94 V-0 |
| Colour | Black |
| Installation Restrictions | For continuous operation in rows without convection cooling, loading must not exceed 80% of nominal current. Parallel connection of multiple circuit breakers is not permitted. |
| Country of Origin | Germany |
What is this electronic circuit breaker used for?
The EC-E1 4A is designed for selective protection of 24 V DC load circuits supplied by switched-mode power supplies. It combines active electronic current limitation with overload shutdown to help isolate a faulty circuit.
What are the rated current and operating voltage?
The nominal current is 4 A and the rated operating voltage is 24 V DC. The specified operating voltage range is 18–32 V DC.
How does the breaker respond to short circuits?
Active electronic current limitation restricts fault current, while the electronic tripping characteristic enables short-circuit detection even along long cable runs. This helps reduce the effect of a faulty load circuit on the upstream power supply.
Does the breaker have a remote indication contact?
Yes. It includes one normally open, volt-free signal contact for remote indication, allowing its status to be incorporated into a monitoring circuit.
How is the breaker mounted?
The breaker mounts onto a 35 mm DIN rail. Compatible rail profiles include NS 35/7.5 and NS 35/15.
What are the dimensions?
The unit measures 12.5 mm wide, 83 mm high and 80 mm deep. The specified height is 83 mm on NS 35/7.5 rail and 90.5 mm on NS 35/15 rail.
What type of electrical connections does it use?
The breaker uses screw connections with M4 screws. The specified conductor stripping length is 10 mm, and the maximum tightening torque is 1.2 Nm.
What conductor sizes can the terminals accept?
For single conductors, the terminals accept solid or flexible conductors from 0.5 to 16 mm², corresponding to the stated range of 20–6 AWG. Flexible conductors fitted with ferrules are accepted from 0.5 to 10 mm². Separate limits apply when connecting two conductors in one terminal.
What operating temperature range is specified?
The specified ambient operating temperature is 0°C to 50°C under non-condensing conditions.
What is the enclosure protection rating?
The housing has an IP20 protection rating. It does not provide protection against water ingress.
Is a separate backup fuse required?
The manufacturer's technical data states that a separate backup fuse is not required because the breaker incorporates an integrated failsafe element.
Does mounting several breakers side by side affect continuous loading?
Yes. When breakers are mounted in rows without convection cooling, the manufacturer's installation instructions limit continuous loading to a maximum of 80% of the nominal device current because of thermal effects.
Can multiple breakers be connected in parallel to increase the current rating?
No. Parallel connection of multiple circuit breakers is expressly prohibited by the manufacturer's installation instructions.
Which accessories are listed for use with the breaker?
Listed accessories include continuous plug-in bridges, 35 mm DIN rails, end clamps and terminal markers. These provide options for arranging, securing and identifying breakers within a control panel.
- Protecting individual 24 V DC load circuits against overloads and short circuits in industrial control panels.
- Providing selective circuit protection for equipment supplied by switched-mode power supplies.
- Protecting PLC supply branches and associated control devices within automation systems.
- Separating protection for sensor and actuator circuits in automated machinery.
- Limiting fault current in individual branches to help maintain power to unaffected circuits.
- Providing remote circuit-status indication through an integrated volt-free normally open contact.
- Detecting short circuits on extended cable runs in distributed control installations.
- Building compact, DIN rail-mounted power distribution assemblies in electrical cabinets.
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
5 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
5 months ago
Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
5 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
5 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
6 months ago
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