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November 1, 2018

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

3 amp 24V to 12V DC/DC converter
PST-DCZ series

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

din rail mount option
Optional DIN rail mount

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
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Quantity Price
1-49 $47.60
50-99 $39.70
100-199 $35.08
200+ $33.00
 
PST-DCZ1205 12V 2A
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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
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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-DCZ1205-W
weather resistant 12V 2A
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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 mounting
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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

  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

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

5VDC 3Amp DC/DC converter data sheet

5VDC 5Amp DC/DC converter data sheet

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.

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 75C 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 versionefficiency curves of the DC converter

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


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


Dimensioned drawing of the DCZ series DC converter

Advantages:

OEM Battery Chargers 30V to 12V Inexpensive Switchmode DC/DC Converter.

OEM Battery Chargers High efficiency.

OEM Power Supplies Excellent line and load regulation 30v to 12v converter.

Universal Power Input OEM Power Supplies and OEM Battery Chargers Wide input voltage range 12v 30v dc converter.


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