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June 27, 2022

Robust 3VDC DC/DC Converter, input range 8VDC to 34VDC (12VDC, 24VDC, 28VDC, 34VDC)

3 amp 12V to 3V DC/DC converter
PST-DCZ series shown with standard screw terminals

3 volt DC/DC converters with 8 to 34 VDC input

din rail mount option
Optional DIN rail mount, shown with flying leads option

These are regulated switching power converters (switchmode), designed to allow the use of 3 volt equipment in 12V or 24V vehicles. These 3V output converters have been designed to be very rugged electrically and can be operated continuously at 75°C (65°C for the 5A version).

These are also known as 3 volt voltage reducers, and voltage regulators.
Custom output voltages are available from 3.3VDC to the input voltage minus 1.5 volts (10.5VDC for a 12 volt input, 22.5 for a 24 volt input)

PST-DCZ0303 3V 3A
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Quantity Price
1-49 $47.60
50-99 $39.70
100-199 $35.08
200+ $33.00
PST-DCZ0305 3V 5A
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Quantity Price
1-49 $57.60
50-99 $47.00
100-199 $40.00
200+ $38.20
PST-DCZ0303-W
water resistant 3V 3A
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Quantity Price
1-49 $61.00
50-99 $50.80
100-199 $44.95
200+ $42.25
Note: weather resistant
versions have wire leads instead
of screw terminals
 
 
PST-DCZ0305-W
water resistant 3V 5A
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Quantity Price
1-49 $73.80
50-99 $61.50
100-199 $54.40
200+ $51.10
Note: weather resistant
versions have wire leads
instead of screw terminals
 
Optional DIN mounting hardware
reverse view of DIN rail mountingadd_to_cart.gif
 
Quantity Price
1-49 $3.00
50-99 $2.50
Includes screws and hardware
for both 35mm and 15mm DIN rails
(does not include the rail)
 
 
Optional connectors Price
ZHJX002
adapters with a barrel connector input and screw terminal output
5.5 x 2.1 mm barrel socket
$2.50 each
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SDY-C52M
5.5 x 2.1 mm barrel plug to screw terminal adapter
5.5 x 2.1 mm barrel plug
$2.50 each
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Electrical Specifications

  3 Amp version 5 Amp Version

Output Voltage

3.0 VDC ± 0.1 VDC

3.0 VDC ± 0.1 VDC

Readily Available Custom Output Voltages

3VDC to 9VDC 3VDC to 9VDC

Maximum steady state input voltage range

8 VDC to 34 VDC

**

8 VDC to 34VDC

**

Nominal continuous output current when input voltage is between 8VDC and 20VDC

3.0A

5.0A

Line regulation

± 0.5%

± 0.5%

Load regulation

± 1.0%

± 1.0%

Minimum input voltage for load regulation of 10 %, see Note 1

7 VDC (1 minute duration)

7 VDC (20% sag) (1 minute duration)

No-load current

For 12V input 6mA
For 24V input 10mA
For 30V input 12mV
Same

Maximum output ripple

10mV p-p

25mV p-p

Maximum switching noise level

90mV p-p

90mV p-p

Maximum operating temperature range 

-40°C to 75°C (-40°F to 167°F)

-40°C to 65°C (-40°F to 149°F)

Maximum storage temperature range

-40°C to 90°C (- 40°F to 194°F)

-40°C to 90°C (- 40°F to 194°F)

Minimum efficiency, see Figure 1

78% 24 VDC input, 0.15A load

77% 24 VDC input, 1A load

Maximum efficiency, see Figure 1

89% 12 VDC input, 1.0A load

88% 12 VDC input, 1.0A load

Isolation

Common ground, the negative input is tied to the negative output. The frame is isolated.

**Note: the efficiency drops when the input voltage is above 28 volts, derating either the maximum ambient temperature or output current is appropriate when operating at the higher voltages

Protection

Overload protection 

If there is a short circuit connection or other overload connection is sensed, the unit will automatically limit the output current and, depending on severity, will go into a hiccup mode. See Note 2. 

Over temperature protection

If an extreme over temperature condition occurs the unit will shut down until the temperature is reduced. See Note 3.

Reverse polarity protection

If an in-line 4A fast acting fuse (5A for the 5A model) is connected as shown in Figure 2, then the unit will be protected from reverse polarity connection.  If the fuse is used and there is a reverse polarity connection, the fuse will blow and protect the unit from damage. See Note 4.

Physical Specifications for both models

Weight

108 grams or about 3.8 ounces

Dimensions

Length

Width

Height

120mm (4.73 inches)

55mm (2.17 inches)

33mm (1.30 inches)

Connections

 

Input connector

2 position screw terminal block will accept 14awg to 24 awg wire

 

Output connector

2 position screw terminal block will accept 14awg to 24 awg wire

 
Input and output connectors for weather resistant versions 18AWG Red and Black wires, 6 inches (15 cm) long  
Pinout There are two screw terminals on the input, and two screw terminals on the output. These are on opposite sides of the converter.  

Full Data Sheets

5VDC 3Amp DC/DC converter data sheet

5VDC 5Amp DC/DC converter data sheet


Note 1: Extended operation at voltages less than 8.0 VDC is not recommended although the unit will work at voltages lower than this with reduced load regulation. With voltages lower than 7.0 VDC, output voltage will drop out until the voltage is increased.

Note 2: If an overload is sensed, the unit will automatically limit the output current and reduce the output voltage. If the output voltage is excessively reduced to limit current, the unit will go into a hiccup mode and wait until the overload is removed to restore power. This dual-mode overload protection system allows the unit to be protected from continuous short circuit connection and other overload conditions.

Note 3: Extended operation at temperatures above 75°C can damage the unit and will void the warranty.

Note 4: If the in-line 4A fast-acting fuse is not connected as shown in Figure 2, a reverse polarity connection can damage the unit and will void the warranty.

Typical efficiency curve for the 5VDC 3Amp model
\efficiency curves of the DC converter

Efficiency curves for the 5VDC 5Amp DC-DC converter


efficiency curve for the 5volt 5amp dc converter
connection diagram of the DCZ series DC converters

DIN Rail Mount Option

din rail mount reverse view of DIN rail mounting
DIN rail mount Optional mounting hardware for 35mm or 15mm DIN rails. Rail not included.
Dimensioned drawing of the DCZ series DC converter

Advantages:

OEM Battery Chargers Inexpensive Switchmode DC/DC Converter.

OEM Battery Chargers High efficiency.

OEM Power Supplies Excellent line and load regulation.

Universal Power Input OEM Power Supplies and OEM Battery Chargers Wide input voltage range.


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12 to 3 volt DC/DC converter

PowerStream Technology
1163 South 1680 West
Orem, Utah 84058
USA

Phone: 801-764-9060
Fax: 801-764-9061

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