RWS1000B-48
1000W industrial AC-DC power supply with 48V output, 94% efficiency, and wide temperature range for harsh environments.
Product Overview
Description
The RWS1000B-48 from TDK-Lambda is a robust 1000W AC-DC power supply engineered for harsh industrial environments. Delivering 48VDC at 21A, this power supply features a wide operating temperature range of -40°C to +85°C and high efficiency of 94%. The universal 85-264VAC input with active PFC ensures global compatibility and compliance with harmonic regulations. Built-in protection features include overvoltage, overcurrent, overtemperature, and short circuit protection. The compact 2U height chassis mount design with built-in fan cooling makes it ideal for industrial control panels, automation equipment, and telecommunications infrastructure. With an MTBF of 500,000 hours and 5-year warranty, the RWS1000B-48 provides reliable long-term operation.
Product Series
RWS
Primary Application
Industrial automation
Key Features
- 1000W output power with 48V at 21A
- Wide operating temperature -40°C to +85°C
- High efficiency 94% with active PFC
- Universal 85-264VAC input
- Built-in fan cooling
- Chassis mount design
- Comprehensive protection features
- 5-year standard warranty
Specifications
| outputPower | 1000W |
|---|---|
| inputVoltage | 85-264VAC |
| outputVoltage | 48VDC |
| outputCurrent | 21A |
| efficiency | 94% |
| operatingTemperature | -40°C to +85°C |
| safetyStandards | IEC 62368-1, UL 62368-1 |
| mtbf | 500,000 hours |
| dimensions | 254mm x 127mm x 86mm |
| cooling | Built-in fan |
| warranty | 5 years |
Applications
Industrial automation
Industrial automation and control
Factory control systems
Industrial automation and control
Telecommunications base stations
Communication and interface
LED lighting systems
Electronic system design
Test and measurement equipment
Data acquisition and conversion
Semiconductor manufacturing
Electronic system design
Robotics and motion control
Industrial automation and control
Data center power
Electronic system design
FAE Expert Insights
"The RWS1000B-48 is my top recommendation for industrial applications requiring high power and wide temperature operation. The -40°C to +85°C range is exceptional - I've used these in outdoor telecom enclosures in both desert and arctic environments without issues. The 48V output is ideal for Power over Ethernet++ and industrial distributed power systems. The built-in fan provides reliable cooling even in dusty environments, though I recommend adding external filtration in severe conditions. The 94% efficiency keeps heat generation manageable. One consideration is the size - it's a substantial unit, so verify your panel space. For industrial automation projects, the combination of reliability, wide temperature range, and global certifications makes this a safe choice."
Rugged industrial design with exceptional -40°C to +85°C operating range
— David Wang, BeiLuo
Frequently Asked Questions
What is the fan noise level of the RWS1000B-48?
The RWS1000B-48 features a temperature-controlled fan that adjusts speed based on internal temperature and load. At low loads and ambient temperatures below 40°C, the fan operates at reduced speed with noise levels around 35-40 dBA. At full load and high ambient temperatures, fan speed increases to maintain safe operating temperatures, with maximum noise around 50-55 dBA. The fan uses a ball bearing design rated for 50,000 hours at 40°C for long service life. For noise-sensitive applications, consider operating the supply below maximum rating or adding external sound dampening. The fan can be replaced in the field if necessary, though this should be done by qualified personnel due to high voltage present inside the unit.
For noise-sensitive applications, consider operating below maximum load or selecting a convection-cooled model.
How does the wide temperature range affect reliability?
The RWS1000B-48's -40°C to +85°C operating range is achieved through careful component selection and thermal design. At low temperatures, special capacitors and semiconductors rated for cold start are used to ensure proper startup. At high temperatures, thermal derating protects components from excessive stress. The 500,000-hour MTBF is specified at 25°C ambient - actual MTBF varies with temperature following the Arrhenius relationship. For example, operating at 45°C instead of 25°C approximately halves the MTBF. The wide temperature capability makes this supply ideal for outdoor installations, uncontrolled environments, and equipment subject to solar heating. For maximum reliability, operate the supply at moderate temperatures with adequate airflow.
For maximum reliability, design your thermal management to keep the power supply at moderate temperatures even in high ambient conditions.
What mounting options are available for the RWS1000B-48?
The RWS1000B-48 is designed for chassis mount installation with multiple mounting options: Base plate mounting using four M4 screws through the bottom of the chassis - this provides the best thermal coupling to a heatsink or chassis; Side mounting using M4 screws through the side flanges for vertical installation; DIN rail mounting using optional adapter brackets (part number available from TDK-Lambda). The unit should be mounted with the fan intake and exhaust unobstructed for proper airflow. Maintain at least 50mm clearance on all sides for cooling. The mounting surface should be capable of supporting the 2.5kg weight and withstanding the torque from mounting screws. For mobile or vibration-prone applications, use lock washers or thread-locking compound on mounting screws.
Select the mounting method that provides adequate cooling airflow and mechanical stability for your application environment.
Can the output voltage be adjusted on the RWS1000B-48?
The RWS1000B-48 features an adjustable output voltage range of 43.2V to 52.8V (±10% of nominal 48V). Adjustment is made via a trim potentiometer accessible through a hole in the chassis. To adjust: Remove power and wait for capacitors to discharge; Remove the adjustment hole cover; Use a non-conductive tool to turn the trim pot; Measure output voltage while applying power; Replace the cover when complete. The adjustment range accommodates voltage drop in long cables when using remote sense, or allows fine-tuning for battery charging applications. Note that adjusting the output voltage may affect overvoltage protection threshold and efficiency. For applications requiring wider voltage adjustment, consider programmable power supplies from TDK-Lambda's GENESYS series.
Use the voltage trim for fine-tuning output or compensating for cable drops, not for wide-range voltage requirements.
What input protection does the RWS1000B-48 include?
The RWS1000B-48 includes comprehensive input protection: Inrush current limiting - a thermistor limits inrush current to approximately 50A peak at 230VAC, protecting input fuses and circuit breakers; Input fuse - internal fuse protects against catastrophic failures (not user replaceable); Undervoltage lockout - prevents operation below 75VAC to avoid abnormal operation during brownout conditions; Overvoltage protection - internal protection against transient overvoltage events; EMI filter - built-in filter meets conducted EMI standards. External protection recommendations: Use a slow-blow fuse or circuit breaker rated 15-20A; Consider a surge protective device (SPD) for locations with frequent lightning; Use an input switch rated for the inrush current. The active PFC circuit maintains high power factor (>0.95) across the input voltage range.
Size external fuses and circuit breakers to handle inrush current while providing protection against sustained overloads.