April 25, 2024

Robust 12VDC and 24VDC (8VDC to 34VDC) to 9V DC/DC converter

PST-DCZ series shown with standard screw terminals

9 volt DC/DC converters with 8 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 9 volt equipment in 12V or 24V vehicles. These 9V 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 9 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-DCZ0903 9V 3A
Quantity	Price
1-49	$47.60
50-99	$39.70
100-199	$35.08
200+	$33.00

PST-DCZ0905 9V 5A
Quantity	Price
1-49	$57.60
50-99	$47.00
100-199	$40.00
200+	$38.20

PST-DCZ0903-W weather resistant 9V 3A
Quantity	Price
1-49	$61.00
50-99	$50.80
100-199	$44.95
200+	$42.25

PST-DCZ0905-W weather resistant 9V 5A
Quantity	Price
1-49	$73.80
50-99	$61.50
100-199	$54.40
200+	$51.10

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

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)

Electrical Specifications
	3 Amp version	5 Amp Version
Output Voltage	9.0 VDC ± 0.1 VDC	9.0 VDC ± 0.1 VDC
Readily Available Custom Output Voltages	3VDC to 9VDC	3VDC to 9VDC
Maximum steady state input voltage range	10.5 VDC to 34 VDC **	10.5 VDC to 34 VDC **
Nominal continuous output current when input voltage is between 8VDC and 34VDC	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	10.5 VDC (1 minute duration)	10.5 VDC (1 minute duration)
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.
No-load input current	For 12V input 6mA For 24V input 10mA For 30V input 12mV

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.

**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

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

9VDC 3Amp DC/DC converter data sheet

9VDC 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 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 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:

Inexpensive Switchmode DC/DC Converter.

High efficiency.

Excellent line and load regulation.

Wide input voltage range.

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12 to 9 volt DC/DC converter

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