How to choose the right DIN rail power supply
A practical and technical guide to choosing the right Delta power supply for industrial applications.
The right power supply is crucial for operational reliability, service life and performance in your control cabinet.
This guide will help you choose the right Delta model based on power, environment, and requirements.
A practical and technical guide to choosing the right Delta power supply for industrial applications.
The right power supply is crucial for operational reliability, service life and performance in your control cabinet.
This guide will help you choose the right Delta model based on power, environment, and requirements.
Industrial control cabinets and machine controls
This is Delta's recommended default choice for automation.
You get high efficiency, very slim design, the possibility of parallel connection (selected models) and constant current mode for heavy loads.
Typical applications:
- PLC system
- I/O modules
- Machine control
- Heavy loads and equipment with inrush current
Choose this series when you need DNV approval, extra robust mechanics or APB (Advanced Power Boost).
Perfect for vibrations, moisture, cold and harsh conditions.
Typical applications:
- Marine systems
- Offshore
- Process industry with tough requirements
- Vibration or moisture environments
LYTE II
An affordable and reliable choice for installations where operating requirements are lower and where parallel connection or special approvals are not required.
Very good for space-limited cabinets.
Typical applications:
- General industrial construction
- OEM production
- Compact control cabinets
- Smaller machines
Designed for smaller systems, elevators, security systems and building automation.
Class II (double insulation) and NEC Class 2 make it particularly suitable for residential applications.
Typical applications:
- Elevator and door control
- BMS / KNX
- Alarm and security systems
- Smaller control cabinet
Comparison table – Delta DIN rail power supplies
| Series | Power range | Input voltage AC | Output voltages | Efficiency (typ.) | Temp range | Parallel connection | Recommended for | Key features | Approvals |
|---|---|---|---|---|---|---|---|---|---|
| Force GT | 120–960W | 90–264V | 320-575V (3-phase) | 12V | 24V | 48V | 91–95 % | –25 … +70 °C | Yes (selected models) | Standard choice for industrial automation | Constant current mode, ultra-slim design | UL 62368-1, CE |
| CliQ M | 81–960W | 85–276V | 320-600V (3-phase) | 12V | 24V | 48V | 91–94 % | –25 … +70 °C | Yes | Marine and harsh environments | Advanced Power Boost (APB), metal casing | DNV, CE, UL, SIL3 |
| LYTE II | 120–480W | 90–264V | 12V | 24V | 48V | 90–93 % | –25 … +70 °C | No | Cost-effective standard installations | Slim design, low idle consumption | UL 508, CE |
| CHROME II | 10–100W | 90–264V | 125–375V | 5V | 12V | 24V | 87–90 % | –20 … +70 °C | No | Small systems & building automation | Class II, NEC Class 2 | UL 60950, CE |
FAQ – Frequently Asked Questions about DIN Rail Power Supplies
Which series should I choose for industrial automation?
Delta generally recommends Force GT for most industrial applications.
It is ultra-slim, efficient and handles high starting currents through its constant current mode.
Only if the installation requires DNV or extra robustness should you choose CliQ M.
Which power supply is best suited for marine installations?
Here is CliQ M the obvious choice.
It has DNV Maritime and is built for vibrations, moisture and harsher environmental conditions.
Which models support parallel connection for redundancy (N+1)?
Only the following series are intended for parallel operation:
- Force GT (selected models)
- CliQ M (several models)
LYTE II and CHROME II does not support parallel connection.
When are redundant power supplies needed?
Redundancy is recommended when operational reliability is critical, for example in:
- process industry
- marine systems
- security system
- 24/7 operation
- applications where downtime is not accepted
What is Advanced Power Boost (APB)?
APB is a feature in CliQ M that allows the power supply to handle heavy loads and high starting currents without shutting down.
Perfect for motors, valve terminals or equipment with inrush currents.
Force-GT instead uses constant current mode for similar scenarios.
Is LYTE II good enough for industrial applications?
Yes – LYTE II is a cost-effective choice for standard installations.
It has high efficiency, slim design and wide temperature range.
However, for critical installations, Force-GT or CliQ M are recommended.
When should you choose Force-GT instead of CliQ M?
Delta recommends Force GT as a first choicein most industrial applications.
Choose Force-GT when you need:
- ultra-slim DIN profile
- high efficiency
- constant current mode
- 1-phase or 3-phase variants
- parallel connection option in some models
Choose instead CliQ M if the installation requires DNV or extra robustness for tough environments.
Which power supply is best for small control systems or building automation?
CHROME II is developed for smaller control systems, elevators, security systems and building automation.
Class II design (double insulation) makes it particularly suitable where safety requirements are higher.
Can I use CHROME II and LYTE II in the same setup as Force-GT or CliQ M?
Yes, as long as they not be connected in parallel.
However, keep in mind that different series may have slightly different load profiles and tolerances.
How much should you oversize a power supply?
A good rule of thumb is to add 20–30 % margin for starting currents, temperature variations and future expansion.
Can these series withstand high temperatures?
Yes. All four series can withstand temperatures of at least –20 … +70 °C.
The best temperature range is LYTE II and Force GT.
Are there 3-phase options in these series?
Yes:
- Force GT → 1-phase and 3-phase models
- CliQ M → 1-phase and 3-phase models
- LYTE II and CHROME II → 1-phase only
Do you need help choosing the right power supply?
Our experts will help you find the right cabinet for your application.
