June 27, 2022

Robust 14VDC and 24VDC (13.5VDC to 34VDC) to 12V DC/DC converter

PST-DCZ series shown with standard screw terminals

12 volt DC/DC converters with 13.5 to 34 VDC input

Optional DIN rail mount, shown with flying leads option

These are regulated switching power converters (switchmode), designed to allow the use of 12 volt equipment 24V vehicles. These 12V output converters have been designed to be very rugged electrically and can be operated continuously at 75°C (65°C for the 2A version).
These are also known as 12 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-DCZ1203 12V 1.25A
Quantity	Price
1-49	$47.60
50-99	$39.70
100-199	$35.08
200+	$33.00

PST-DCZ1205 12V 2A
Quantity	Price
1-49	$57.60
50-99	$47.00
100-199	$40.00
200+	$38.20

PST-DCZ1203-W weather resistant 12V 1.25A
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-DCZ1205-W weather resistant 12V 2A
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
Quantity	Price
1-49	$3.50
50-99	$2.50
Includes screws and hardware for both 35mm and 15mm DIN rails (does not include the rail)

Optional connectors	Price
ZHJX002 5.5 x 2.1 mm barrel socket	$2.50 each
SDY-C52M 5.5 x 2.1 mm barrel plug	$2.50 each

Electrical Specifications
	1.25 Amp version	2 Amp Version
Output Voltage	12.0 VDC ± 0.1 VDC	12.0 VDC ± 0.1 VDC
Readily Available Custom Output Voltages	3VDC to 13VDC	3VDC to 13VDC
Maximum steady state input voltage range	13.5 VDC to 34 VDC **	13.5 VDC to 34 VDC **
Nominal continuous output current when input voltage is between 8VDC and 20VDC	1.25A	2.0A
Load regulation	± 1.0%	± 1.0%
Line regulation	± 0.5%	± 0.5%
Minimum input voltage for load regulation of 10 %, see Note 1	13.5 VDC (1 minute duration)	13.5 VDC (1 minute duration)
Maximum output ripple	10mV p-p	25mV p-p
Maximum switching noise level	90mV p-p	90mV p-p
No-load input current	For 13.5V input 6mA For 24V input 10mA For 30V input 12mV	Same
Maximum storage temperature range	-40°C to 90°C (- 40°F to 194°F)	-40°C to 90°C (- 40°F to 194°F)
Maximum operating temperature range	-40°C to 75°C (-40°F to 167°F)	-40°C to 65°C (-40°F to 149°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.

Protection
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 1205 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.
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.

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

12VDC 3Amp DC/DC converter data sheet

12VDC 5Amp DC/DC converter data sheet

DIN Rail Mount Option


	Optional mounting hardware for 35mm or 15mm DIN rails. Rail not included.

Note 1: Extended operation at voltages less than 13.5 VDC is not recommended although the unit will work at voltages lower than this with reduced load regulation.

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 version
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

Dimensioned drawing of the DCZ series DC converter

Advantages:

30V to 12V Inexpensive Switchmode DC/DC Converter.

High efficiency.

Excellent line and load regulation 30v to 12v converter.

Wide input voltage range 12v 30v dc converter.

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Thank you for considering PowerStream

24 to 12 volt DC/DC converter
30v to 12v regulator
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