GENERAL SPECIFICATIONS

Efficiency

See table

Isolation voltage

Input to Output

Input to Case

Output to Case

1600 VDC, min.

1000 VDC, min.

1000 VDC, min.

Isolation resistance

10

7

ohms, min

Isolation capacitance

2500 pF, max

Switching frequency

300 KHz, typ

Approvals and standard (Note 5)

IEC60950, UL60950, EN60950

Case material

Open with Aluminum base-plate

Weight

50g (1.76 oz)

MTBF

Bellcore TR-NWT-000332, Tc=40

, Io=80%, max.

3 x 10

ENVIRONMENTAL SPECIFICATIONS

Operating base-plate temperature range (Note 6)

-40ºC to +100ºC

Over temperature protection

110ºC

Humidity max, Non-condensing

95%

Storage temperature range

-55ºC to +125ºC

Thermal shock

MIL-STD-810D

Vibration

10~55Hz, 2G, 3minutes period, 30minutes along X,Y and Z

EMC CHARACTERISTICS

Conducted emissions

EN55022 (Note 7)

EN55022 (Note 7)

Level A

Level B

Radiated emissions

EN55022

Level A

ESD

Radiated immunity

Fast transient

Surge

Conducted immunity

EN61000-4-2

EN61000-4-3

EN61000-4-4

EN61000-4-5

EN61000-4-6

Perf. Criteria2

Perf. Criteria2

Perf. Criteria2

Perf. Criteria2

Perf. Criteria2

OUTPUT SPECIFICATIONS

Output power

50 Watts max

Voltage accuracy

Full load and nominal Vin

± 1.5%

Voltage adjustability (Note 1)

+ 10% , -20%

Minimum load

0%

Line regulation

LL to HL at FL

See table

Load regulation

0% to 100% FL

See table

Remote sense (Note 1)

10% of Vout

Ripple and noise(Note 2) 20MHz bandwidth

100mVp-p

Temperature coefficient

I0.02% / ºC, max

Transient response

recovery time

25% load step change

200uS

Over voltage protection threshold (Hiccup)

115% ~ 130% of Vout

Over current protection threshold

110% ~ 140% of Iout Rated

Short circuit protection

Hiccup, automatics recovery

INPUT SPECIFICATIONS

Input voltage range

24V input

48V input

18 – 36VDC

36 – 75VDC

UVLO start-up voltage

24V input

48V input

17V typ.

34V typ.

UVLO shuntdown voltage

24V input

48V input

15V typ.

32V typ.

Input filter (Note 3)

L-C type

Input voltage variation

dv/dt

5V/ms,max

(Complies with ETS300 132 part 4.4)

Input surge voltage 100mS max

24V input

48V input

50VDC

100VDC

Start up time

Nominal Vin and constant

resistive load

25mS typ.

Input reflected-ripple current

(5Hz to 20 MHz, 12uH source impedance)

24V input

48V input

50mAp-p

20mAp-p

Remote ON/OFF(Note 4)

(Positive logic)

(Negative logic)

ON=Open or 3.5V < Vr < 15V,

 max.

OFF=Short or 0V < Vr < 1.2V,

 max.

ON=Short or 0V < Vr < 1.2V,

 max.

OFF=Open or 3.5V < Vr < 15V,

 max.

HEC50-S single output DC/DC converters provide up to 50 watts of output power in an

industry standard half-brick package and footprint. These units are specifically

designed to meet the power needs of low-voltage silicon. All models feature a wide

input range, trimmable output voltage and a 15A current rating. Remote sense and

remote on/off facilities are included as standard, and the converters are

comprehensively protected against over-current, over-voltage and over-temperature

conditions. The HEC50 converters are especially suited to telecom, networking and

industrial application.

UL

E193009

TUV R50020744

CB

JPTUV-5363

CE MARK