WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

WRA-ZD-4W&WRB-ZD-4W

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 2 of 3

Input

Input

Input

Input

Input

Input

Input

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Input current no load /full load

24 Vin models

20 mA

/ 400 mA typ. (at 12 VDC Vin)

20 mA

/ 200 mA typ. (at 24 VDC Vin)

48 Vin models

6 mA

/ 200 mA typ. (at 24 VDC Vin)

6 mA

/ 100 mA typ. (at 48 VDC Vin)

Start-up voltage / under voltage shut down

24 Vin models

8.5 VDC /8.0 VDC typ.

48 Vin models

17 VDC /16

VDC typ.

Surge voltage (1 sec. max.)

24 Vin models

50 V max.

48 Vin models

100 V max.

Reverse voltage protection

1.0 A max.

Conducted noise

(input)

EN 55022 level A, FCC part 15, level A

Output

Output

Output

Output

Output

Output

Output

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Voltage set accuracy

± 1 %

Regulation

– Input variation

Vin min. to Vin max.

± 0.3 % max.

– Load variation 10 – 100%

– single output model

± 1.0 % max.

– dual output models balanced load

± 1.0 % max.

– dual output models unbalanced load

± 3.0 % max.

Ripple and noise

(20 MHz Bandwidth)

450 mVpk-pk max

Temperature coefficient

± 0.02 % / ℃

Current limitation

> 110% of Iout max., constant current

Short circuit protection

Hiccup mode, indefinite (automatic recovery)

Capacitive load

– single output model

680 μF max.

– dual output model

300 μF max.

General

General

General

General

General

General

General

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Temperature ranges

– Operating

– 40°C ... + 75°C(no derating)

– Case temperature

+ 95 °C max.

– Storage

– 40 °C ... + 125 °C

Humidity (non condensing)

95 % rel H max.

Reliability, calculated MTBF (MIL-HDBK-217 E)

>1 Mio. h @ + 25 °C

Isolation voltage

Input/Output

1500 VDC

Isolation capacity

Input/Output

380 pF typ

Isolation resistance

Input/Output (500 VDC)

> 1000 M Ohm

Switching frequency

350 kHz typ. (Pulse frequency modulation PFM)

Safety standards

UL 1950 , IEC 60950, EN 60950

Compliance up to 60 VDC input voltage(SELV

limit)

Safety approval

cUL / UL

File E188913

All specifications

valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.