Remote Shutdown Reference
Switching Frequency 2.5 & 3.3, 5V Model
Thermal Shutdown Range
Vibration, 3 Axes, 5 Min Each
MTBF † (Bellcore Tr-nwt-000332)
Input Reverse Voltage Protection
Input Undervoltage Lockout / Hysteresis
Line Regulation V in Min. - V in Max., I out Rated
Load Regulation I out Min. - Iout Max., V in Nom.
Remote Sense Headroom
Minimum Output Current
Dynamic Regulation, Loadstep
Voltage Trim Range
Short Circuit / Overcurrent Protection
Current Limit Threshold Range, % of I out Rated
OVP Trip Range
Powering Communications and Technology
Input - Output
Input - Case
Output - Case
24 VDC Nominal
48 VDC Nominal
UL 1950, Csa 22.2-950, En60950
200 kHz, 300 kHz (Respectively)
Positive Or Negative Logic
120 - 140% V out Nom.
Shutdown / Hiccup
5 g, 10 - 55 Hz
-40 To +100°C
-40 To +125°C
105 To 115°C
1.8 X 10 6 hrs
V in Negative
18 - 36 VDC
36 - 72 VDC
110 - 130%
0.2% V out
0.2% V out
25% I out
4% V out
HES single output DC/DC converters provide up to
150 Watts of output power in an industry standard,
half-brick package and footprint. These units feature
ultra-high efficiency, Class A conducted noise specs,
and fixed switching frequency. The HES is designed
with open-frame packaging, along with planar
magnetics to provide maximum useable power with
minimal thermal constraints. The HES is especially
suited to harsh telecom, networking, and industrial
applications, and is fully compatible with production
board washing processes.
• High Efficiency
• Industry Standard Half-
• Open-Frame Packaging
• 100°C Baseplate
† MTBF predictions may vary slightly from model to model.
Specifications typically at 25°C, normal line, and full load,
unless otherwise stated.
Soldering Conditions: I/O pins, 260°C, ten seconds; fully
compatible with commercial wave-soldering equipment.
Safety: Agency approvals may vary from model to model.
Please consult factory for specific model information.
Units are water-washable and fully compatible with commercial
spray or immersion post wave-solder washing equipment.
Efficiency vs. Load (48V Input)
X10 = LOAD %
• Water Washable
• “True-Trim” Option
• 1500V Isolation
• Positive or Negative