Delta Electronics Q54SH120A1 1300W 1/4-Brick DC/DC Power Module

Delta's Q54SH120A1 delivers 1300W power in quarter-brick size with 97.2% peak efficiency, PMBus control, and direct parallel operation capability.

• 1300W power density in compact 2.30"×1.45"×0.59" package
• 97.2% peak efficiency reduces thermal challenges
• PMBus digital interface for real-time monitoring/control

The Delta Q54SH120A1 represents the industry-leading 1300W power solution in quarter-brick format, delivering 11.8V/110A output from 40-60V input range. Designed for mission-critical applications requiring uncompromising reliability and performance. In the realm of high-density power conversion, the Delta Q54SH120A1 stands as a testament to engineering excellence. This compact power workhorse, no larger than a deck of playing cards, defies conventional limitations by delivering an astounding 1300 watts of clean, regulated power. Enclosed within its rugged quarter-brick housing lies Delta's cutting-edge power conversion technology, where precisely engineered components orchestrate an energy transformation ballet. The converter effortlessly transforms input voltages between 40-60VDC into a rock-steady 11.8V output, maintaining voltage regulation within a razor-thin ±2% window even under demanding load conditions. What truly sets this power module apart is its remarkable 97.2% peak efficiency - a figure that represents negligible energy loss, translating to cooler operation and lower lifetime costs. The thermal architecture employs innovative heat-spreading techniques, with internal copper pathways expertly channeling heat away from sensitive components. Optional heatsinks stand ready for the most thermally challenging environments. Sophisticated protection mechanisms silently stand guard, defending against electrical and thermal abnormalities. Should conditions exceed safe thresholds, intelligent safeguards activate instantaneously, preserving both the module and connected systems. The 707V isolation barrier provides an impenetrable divide between input and output circuits, ensuring operational safety. Modern digital intelligence permeates the design through its PMBus interface, offering system designers unprecedented control and visibility. Parameters can be monitored in real-time, protective thresholds adjusted on-the-fly, and multiple units coordinated in perfect harmony when parallel operation is required for higher power needs. Built to military-grade standards, the Q54SH120A1 withstands the rigors of harsh operating environments. Its vibration-resistant construction and wide temperature tolerance make it equally at home in sweltering data centers or freezing telecommunications shelters. The module's reliability is quantified by an impressive MTBF exceeding four million hours - a number that speaks to Delta's rigorous design and manufacturing processes.

Engineering Breakthroughs

• Advanced topology with synchronous rectification
• Optimized thermal design with integrated heatsink
• Active droop current sharing for parallel operation
• 707Vdc input-output isolation

Performance Specifications

Electrical Characteristics

Parameter	Value
Input Voltage Range	40-60Vdc
Output Voltage	11.8V ±2%
Maximum Output Current	110A
Peak Efficiency	97.2%
Switching Frequency	330-1100 kHz
Isolation Voltage	707Vdc

Thermal Performance

Cooling Condition	Maximum Ambient Temp
300 LFM airflow	85°C at full load
With QTL050A heatsink	95°C at full load

Q54SH120A1 DC/DC Converter Applications

This converter sets the new standard for high-density power conversion, combining Delta's three decades of power electronics expertise with cutting-edge digital control technology. The Q54SH120A1 is engineered to meet the most demanding requirements of next-generation:

• 48V server power systems
• 5G telecom infrastructure
• AI accelerator cards
• Industrial robotic controllers
• 5G Telecom equipment
• Enterprise servers
• Network switches/routers
• Industrial automation
• High-performance computing

Product Attributes

Attribute	Specification
Active Droop Performance	Yes
Dimensions	58.4×36.8×15.0mm
Efficiency (Peak)	97.2%
Input Current (Max)	35A @40Vin
Input Undervoltage Lockout	39-40V (on) / 37-39V (off)
Isolation Voltage	707Vdc
Load Regulation	±400mV
MTBF	4.09 million hours
No-Load Input Current	350mA
Operating Temperature	-40°C to +85°C
Output Current	110A continuous
Output Ripple	150mVp-p
Parallel Operation	Direct connection supported
PMBus Interface	Ver 1.2 compliant
Remote On/Off	Negative logic
Safety Certifications	UL 62368-1, EN 62368-1
Weight	80g

Q54SH Series Overview

The Delta Electronics Q54SH Series represents a breakthrough in quarter-brick DC/DC converter design, delivering unprecedented power density from 600W to 1300W while maintaining the standard 2.30" × 1.45" × 0.59" footprint. Engineered for the most demanding applications in telecom, datacenter, and industrial environments, these converters combine military-grade reliability with cutting-edge power conversion efficiency.

• Input Voltage Range: 40-60VDC (54V nominal)
• Output Voltage: 11.8VDC regulated ±2%
• Power Range: 600-1300W continuous
• Current Range: 51-110A max output current
• Peak Efficiency: Up to 97.8% (97.2% for 1300W model)
• Switching Frequency: 330-1100kHz adaptive operation

Advanced Features

1. Revolutionary Thermal Management

Delta's patented heat-spreader technology enables:

• 15°C lower hot-spot temperatures vs. competitors
• Dual-orientation operation (transverse/longitudinal airflow)
• Zero derating up to 400LFM airflow (600W model)
• Optional heatsinks (QTL050A/QLL050A) for convection-cooled applications

2. Intelligent Power Management

PMBus 1.2 compliant interface provides:

• Real-time monitoring (Vin, Vout, Iout, temperature)
• Programmable fault thresholds (OVP/UVP/OCP/OTP)
• 14 configurable addresses via resistor programming
• Support for 100kHz/400kHz bus speeds
• Full PEC (Packet Error Checking) implementation

3. Robust Protection Suite

• Input protections: UVLO (37-40V), OVP (60.5-62V)
• Output protections: Hiccup-mode OCP (110-130%), adjustable OVP
• Thermal protection: 130°C shutdown with auto-recovery
• Isolation: 707VDC reinforced isolation (input-output)

Industry-Leading Performance Characteristics

Efficiency Benchmarks

![Efficiency curves showing >96% efficiency across 20-100% load range at 54Vin]

Thermal Performance Data

• Thermal resistance: 0.8°C/W (case-to-ambient with heatsink)
• Maximum component temperatures:
  • MOSFETs: ≤105°C at 1300W full load
  • Magnetics: ≤110°C at 1300W full load
• MTBF: 4.09 million hours (MIL-HDBK-217F)

Q54SH Series Application Engineering

Designed for Critical Power Systems

1. 48V Server Power Architectures
   • Direct conversion for CPU/GPU power rails
   • Parallel operation for multi-phase VRMs
2. 5G Base Station Power
   • Supports stringent EN 300 132-3-1 standards
   • Robust against input voltage transients
3. Industrial Automation
   • Withstands 10g vibration (MIL-STD-810)
   • -40°C to +85°C operation range

Configuration Flexibility

• Remote control options: Negative/positive logic
• Startup sequencing: Adjustable delay (0-82ms)
• Output adjustment: ±10% via PMBus commands
• Modular design: Hot-swap capable (with external circuitry)

Series Comparison Table

Q54SH120A1 comparison with alternative parts

Model	Power	Max Current	Efficiency	Dimensions
Q54SH12050	600W	51A	96.5%	2.30"×1.45"×0.59"
Q54SH12060	700W	59A	96.7%	2.30"×1.45"×0.59"
Q54SH12068	800W	68A	96.9%	2.30"×1.45"×0.59"
Q54SH12084	1000W	85A	97.1%	2.30"×1.45"×0.59"
Q54SH120A1	1300W	110A	97.2%	2.30"×1.45"×0.59"

Frequently Asked Questions

Q: How does Q54SH120A1 compare to conventional quarter-brick converters? A: The Q54SH120A1 delivers 50% more power (1300W vs typical 800W) in the same footprint while achieving 97.2% efficiency - 2-3% higher than conventional designs. Q: What cooling solution is required for Q54SH120A1 at full load? A: Requires 300LFM airflow or optional heatsink (QTL050A/QLL050A). For systems using Ebmpapst W4D400-DP12-40 AC fans, ensure proper airflow direction from Vin- to Vin+ pins. Q: Can Q54SH120A1 operate in parallel without external components? A: Yes, it features direct parallel capability using active droop current sharing - simply connect Vin/Vout pins without OR-ing FETs. Q: What PMBus functions does Q54SH120A1 support? A: Full monitoring (Vin/Vout/Iout/temp) and control (on/off/OVP/OCP/OTP), compatible with both 100kHz and 400kHz bus speeds. Q: What input filtering is recommended for Q54SH120A1? A: Delta recommends 220μF low-ESR electrolytic + 2.2μF ceramic capacitors at input with 12μH source impedance for optimal performance.