# AC/DC DIN Rail Power Supply (PSU), Switch Mode, ITE, 1 Output, 12 W, 24 VDC, 500 mA

![Product image](https://novapart.co/image/farnell:2313956/)

**URL**: https://novapart.co/products/78.12.1.230.2400/ac-dc-din-rail-power-supply-psu-switch-mode-ite-1
**SKU**: 78.12.1.230.2400
**Manufacturer**: FINDER
**Price**: €40.6800
**Stock**: 200+
**Lead Time**: 93 days (indicative)

## Description

No. of Outputs:1 Output; Output Power Max:12W; Output Voltage - Output 1:24VDC; Output Current - Output 1:500mA; Output Voltage - Output 2:-; Output Current - Output 2:-; Output

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Product Range | 78 Series |
| No. Of Outputs | 1 Output |
| Output Power Max | 12W |
| Input Voltage Vac | 110V AC to 240V AC |
| Input Voltage Ac Max | 240VAC |
| Input Voltage Ac Min | 110VAC |
| Power Supply Output Type | Fixed |
| Output Current - Output 1 | 500mA |
| Output Current - Output 2 | - |
| Output Current - Output 3 | - |
| Output Current - Output 4 | - |
| Output Voltage - Output 1 | 24VDC |
| Output Voltage - Output 2 | - |
| Output Voltage - Output 3 | - |
| Output Voltage - Output 4 | - |
| Power Supply Applications | ITE |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2313956/)

78 Series - Switch mode power supplies 

## Features 

## 78.12....2400 78.12....1200 

## 78.36 

Range of modular DC power supplies 

- High efficiency (up to 91%) 

- Low (< 0.4 W) stand-by power absorption 

- Thermal protection: internal, with Vout shutdown 

- Short circuit protection: hiccup (auto-recovery) mode 

- Input protection: replaceable internal fuse plus spare (78.36) 

- Overvoltage protection: varistor 

- Flyback topology 

- 24 V DC, 12 W output 

- 12 V DC, 12 W output 

• 24 V DC, 36 W output 

- Compliant to EN 60950-1 and EN 61204-3 

- Parallel working for automatic redundancy: with OR-IN diode 

- Dual and series connection permissible 

- Small dimensions: 17.5 mm (1 module) or 70 mm (4-modules) wide, 60 mm deep 

- 35 mm rail (EN 60715) mount 

|Range of modular DC power supplies<br>•High efficiency (up to 91%)<br>•Low (< 0.4 W) stand-by power absorption<br>• Thermal protection: internal, with Vout shutdownThermal protection: internal, with Vout shutdownout shutdownshutdown<br>•Short circuit protection: hiccup (auto-recovery)<br>mode<br>•Input protection: replaceable internal fuse plus<br>spare (78.36)<br>•Overvoltage protection: varistor<br>•Flyback topology<br>•Compliant to EN 60950-1 and EN 61204-3<br>•Parallel working for automatic redundancy:<br>with OR-IN diode<br>•Dual and series connection permissible<br>•Small dimensions: 17.5 mm (1 module) or<br>70 mm (4-modules) wide, 60 mm deep<br>•35 mm rail (EN 60715) mount<br>Output specification<br>Output current (–20...+40°C, 230 V AC input) A<br>Features<br>Screw terminal<br>For outline drawing see page 8|78.12....2400<br>• 24 V DC, 12 W output24 V DC, 12 W output<br>®rindor<br>a<br>€e€|78.12....1200<br>• 12 V DC, 12 W output12 V DC, 12 W output<br>©<br>Grinder<br>a<br>ee|• 24 V DC, 36 W output24 V DC, 36 W output<br>78.36<br>oF aoa<br>eae<br>SS<br>Cr ae<br>anne<br>tan<br>Ne<br>—<br>nee<br>hooky =a|
|---|---|---|---|
||0.63<br>1.25<br>1.7<br>*<br>(see diagrams L78)<br>**<br>peak to peak, 100 Hz component, with 100 V AC input<br>***<br>88...100 V AC with output current limited to 80 % IN<br>**** (see derating diagrams P78)|||
|Rated currentIN(50°C, full input operating range)A|0.50|1|1.5|
|Rated voltage<br>V|24|12|24|
|Rated power<br>W|12|12|36|
|Output power (–20...+40°C, 230 V AC input) W|15|15|40|
|Peak current capability for 3 ms *<br>A|2|3|8|
|Output voltage adjust<br>V|—|—|—|
|Voltage variation (from no-load to full-load)|< 1 %|< 1 %|< 1 %|
|Voltage ripple @ full load **<br>mV|< 200|< 200|< 200|
|Hold-up time@full load: with 100 V AC input ms<br>with 260 V AC input ms<br>Input specification<br>Nominal voltage (UN)<br>V AC (50/60 Hz)<br>V DC (not polarized)|< 10|< 10|< 20|
||< 90<br>110...240|< 90<br>110...240|< 100<br>110...240|
||220|220|220|
|Operating range<br>V AC (50/60 Hz)<br>V DC|100...265***<br>V AC (50/60 Hz)|100...265***|100...265***|
||140...370|140...370|140...370|
|Max power absorption<br>VA<br>(@ 100 V AC, 50 Hz)<br>W|28.2|32|57.5|
||14.2|17.2|43|
|Stand-by power absorption<br>W|< 0.4|< 0.4|< 0.4|
|Power factor|0.50|0.53|0.74|
|Max current absorption (@ 88 V AC)<br>A|0.25|0.30|0.6|
|Max. inrush current (peak @ 265 V) for 3 ms A|10|10|12|
|Replaceable protection fuse<br>Technical data<br>Efficiency (@ 230 V AC)<br>%|—<br>85|—<br>87|1 A - T<br>86|
|MTTF<br>H|> 400.000|> 400.000|> 600.000|
|Start-up delay<br>s|< 1|< 1|< 1|
|Dielectric strength between input/output V AC|2,500 (class II)|2,500 (class II)|3,000 (class II)|
|Dielectric strength between input/PE<br>V AC|—|—|—|
|Ambient temperature range ****<br>°C|–20...+60|–20...+60|–20...+70|
|Protection category|IP 20|IP 20|IP 20|
|Approvals(according to type)||||



1 

78 Series - Switch mode power supplies 

## Features 

## 78.60 

## 78.50 

Range of modular DC power supplies 

- High efficiency (up to 91%) 

- Low (< 0.4 W) stand-by power absorption 

- Thermal protection: internal, with Vout shutdown 

- Short circuit protection: hiccup (auto-recovery) mode 

- Overload protection: fold-back mode (78.50 only) 

- Input protection: replaceable internal fuse plus spare 

- Overvoltage protection: varistor 

- Flyback topology 

- ZVS (Zero-voltage-switching), quasi-resonant mode technology 

- Compliant to EN 60950-1 and EN 61204-3 

- Parallel working for automatic redundancy: with OR-IN diode 

- 24 V DC, 60 W output 

- Voltage regulation 24-28V 

- ZVS technology 

   - 12 V DC, 50 W output 

   - Voltage regulation 12-15V 

   - ZVS technology 

   - Suitable for battery charging 

- Dual and series connection permissible 

- Small dimensions: 70 mm (4-modules) wide, 60 mm deep 

- 35 mm rail (EN 60715) mount 

## Screw terminal 

- (see diagrams L78) 

- ** peak to peak, 100 Hz component, with 100 V AC input 

For outline drawing see page 8 

- *** (see derating diagrams P78) 

## Output specification 

|Output current (–20...+40°C, 230 V AC input) A|Output current (–20...+40°C, 230 V AC input) A|2.8|4.6|
|---|---|---|---|
|Rated currentIN(50°C, full input operating range)A||2.5|4.2|
|Rated voltage|V|24|12|
|Rated power|W|60|50|
|Outputpower(–20...+40°C, 230 V AC input)W||68|55|
|Peak current capabilityfor 3 ms *|A|10|12|
|Output voltage adjust|V|24...28|12...15|
|Voltage variation (from no-load to full-load)||< 1 %|< 1 %|
|Voltage ripple @ full load **|mV|< 200|< 200|
|Hold-up time@full load: with 100 V AC input ms||< 20|< 30|
|with 260 V AC input ms||< 130|< 150|
|Input specification||||
|Nominal voltage (UN)<br>V AC (50/60 Hz)|V AC (50/60 Hz)|110...240|110...240|
|V DC (not polarized)||220|220|
|Operating range<br>V AC (50/60 Hz)|V AC (50/60 Hz)|88...265<br>V AC (50/60 Hz)|88...265|
|V DC|V DC|140...370|140...370|
|Max power absorption|VA|90|89|
|(@ 100 V AC, 50 Hz)|W|67.5|58.3|
|Stand-by power absorption|W|< 0.4|< 0.4|
|Power factor||0.75|0.65|
|Max current absorption (@ 88 V AC)|A|0.9|0.85|
|Max. inrush current (peak @ 265 V) for 3 ms A||30|30|
|Replaceable protection fuse||1.6 A - T|1.6 A - T|
|Technical data||||
|Efficiency (@ 230 V AC)|%|91|90|
|MTTF|H|> 500.000|> 400.000|
|Start-up delay<br>Dielectric strength between input/output V AC<br>Dielectric strength between input/PE<br>V AC<br>Ambient temperature range ***<br>Protection category<br>Approvals(according to type)|s<br>V AC<br>V AC<br>°C|< 1<br>3,000 (class II)<br>1,500 (class I)<br>–20...+70<br>IP 20|< 1<br>3,000 (class II)<br>1,500 (class I)<br>–20...+70<br>IP 20|



2 

78 Series - Switch mode power supplies 

## Ordering information 

Example: 78 series switching power supply, 36 W 24 V DC output, supply voltage 110…240 V AC, replaceable fuse. 

A B C D 7 8 . 3 6 . 1 . 2 3 0 . 2 4 0 1 Series D: 0 = Standard Power 1 = Replaceable fuse 12 = 12 W output 3 = Replaceable fuse + 36 = 36 W output output voltage regulator 50 = 50 W output 60 = 60 W output C: 0 = Standard Voltage conversion 1  = AC input, DC output AB: Input voltage 12 = 12 V output 230 =  110…240 V AC 24 = 24 V output Codes 

78.12.1.230.1200 78.12.1.230.2400 78.36.1.230.2401 78.60.1.230.2403 78.50.1.230.1203 

## Technical data 

|EMC specifications (according to EN 61204-3)|EMC specifications (according to EN 61204-3)|EMC specifications (according to EN 61204-3)|Reference standard|78.12, 78.36|78.60, 78.50|
|---|---|---|---|---|---|
|Electrostatic discharge||contact discharge|EN 61000-4-2|4 kV|4 kV|
|||air discharge|EN 61000-4-2|8 kV|8 kV|
|Radiated electromagnetic field||80 … 1,000 MHz|EN 61000-4-3|6 V/m|10 V/m|
|||1 … 2.8 GHz|EN 61000-4-3|3 V/m|3 V/m|
|Fast transients<br>(burst 5/50 ns, 5 and 100 kHz)||on supplyterminals|EN 61000-4-4|2 kV|3 kV|
|Voltage pulses on supply terminals<br>(surge 1.2/50µs)||common mode|EN 61000-4-5|2 kV|2 kV|
|||differential mode|EN 61000-4-5|2 kV(78.12), 4 kV*(78.36)|4 kV *|
|Radio-frequency common mode<br>voltage(0.15…230 MHz)||on supplyterminals|EN 61000-4-6|6 V|10 V|
|Short interruptions|||EN 61000-4-11|5 cycles|6 cycles|
|Radio-frequencyconducted emissions||0.15…30 MHz|EN 55022|class B|class B|
|Radiated emissions||30…1,000 MHz|EN 55022|class B|class B|
|Terminals||||solid cable|stranded cable|
|Max. wire size<br>||mm2<br>AWG<br>||1 x 4 / 2 x 2.5|1 x 4 / 2 x 2.5|
|||||1 x 12 / 2 x 14<br>1 x 12 / 2 x 14<br>||
|S~~c~~rew torque||Nm||0.8||
|Wire strip length||mm||9||
|Other data||||||
|Power lost to the environment||without output current<br>W||0.4||
|||with rated output current<br>W||2(78.12), 5(78.36, 78.50), 5.4(78.60)||



* input fuse may blow for surges higher than 1.5 kV 

3 

78 Series - Switch mode power supplies 

## Output specification 

L78-1 Output current v ambient temperature (78.12) 

L78-2 Output current v ambient temperature (78.36) 

L78-3 Output current v ambient temperature (78.60) 

L78-4 Output current v ambient temperature (78.50) 

**==> picture [144 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
P78-1 Output peak current v time (78.12)<br>**----- End of picture text -----**<br>


P78-2 Output peak current v time (78.36) 

P78-3 Output peak current v time (78.60) 

P78-4 Output peak current v time (78.50) 

4 

78 Series - Switch mode power supplies 

## Hiccup mode 

**==> picture [488 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
Overload current<br>Load current<br>Time<br>Current<br>**----- End of picture text -----**<br>


Under normal conditions, the 78 Series Power Supply supplies the current required by the load. 

However, under abnormal conditions such as a short circuit or heavy overload (T0) the output voltage will be rapidly reduced to zero - followed by the current (T1). After approximately 2 seconds (T1 to T2), the power supply checks for the persistence of the anomaly over the time period T2 to T3 (30 to 100ms - dependent on the type of anomaly). If the anomaly persists, as shown above, the current is again reset to 0 A for a further 2 s (T3 to T4). This “hiccup” process is repeated until the anomaly is removed (Tn), whereon the power supply then returns to normal working. 

## Fold-back mode (78.50 only) 

**==> picture [256 x 154] intentionally omitted <==**

Under normal conditions, the 78.50 supplies the current required by the load. 

In case of heavy overload (up to 110 W / 9.2 A), the fold-back circuit  will limit the output current  linearly as output voltage decreases, in accordance to the diagram above. 

In practice, when overcurrent is drawn by the load, the fold-back circuit  reduces both the output voltage and current to well below the normal operating limits. 

In case of short circuit, the power supply will work in hiccup mode. 

Both these conditions end when the anomaly is removed, whereon the power supply then returns to normal working. 

The fold-back mode allows to use the 78.50 power supply as a battery charger, particularly for charging lead batteries rated 15...20 Ah. It is suggested to insert a diode in series between the + output and the + input of the battery (if not already installed in the battery unit). 

5 

78 Series - Switch mode power supplies 

## Wiring diagrams 

Dual connection 

Series connection 

Dual connection 

**==> picture [204 x 73] intentionally omitted <==**

**----- Start of picture text -----**<br>
* *<br>* Not for 78.36<br>Series connection<br>**----- End of picture text -----**<br>


**==> picture [205 x 53] intentionally omitted <==**

**----- Start of picture text -----**<br>
* *<br>* Not for 78.36<br>**----- End of picture text -----**<br>


Parallel connection (78.50 only) 

6 

78 Series - Switch mode power supplies 

## Application example: redundancy connection 

**==> picture [211 x 195] intentionally omitted <==**

**----- Start of picture text -----**<br>
Manual<br>* *<br>* Not for 78.36<br>**----- End of picture text -----**<br>


**==> picture [212 x 184] intentionally omitted <==**

**----- Start of picture text -----**<br>
Automatic (with parallel connection)<br>* *<br>* Not for 78.36<br>**----- End of picture text -----**<br>


Note: Since parallel working is intended to provide automatic redundancy, rate the load current at no more than In. 

Diode(s) 

**==> picture [442 x 245] intentionally omitted <==**

**----- Start of picture text -----**<br>
Heat-sink or metal panel Heat-sink or metal panel<br>Insulating sheet<br>Insulating sheet<br>or<br>e.g. e.g.<br>**----- End of picture text -----**<br>


7 

## 78 Series - Switch mode power supplies 

## Outline drawings 

78.12 Screw terminal 

**==> picture [46 x 15] intentionally omitted <==**

**----- Start of picture text -----**<br>
78.36<br>Screw terminal<br>**----- End of picture text -----**<br>


78.50 / 78.60 Screw terminal 

## Accessories 

Sheet of marker tags, plastic, 72 tags, 6x12 mm 060.72 

**==> picture [23 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
060.72<br>**----- End of picture text -----**<br>


**==> picture [440 x 44] intentionally omitted <==**

**----- Start of picture text -----**<br>
Identification tag, plastic, 1 tag, 17x25.5 mm 019.01<br>Vd DP |<br>019.01<br>**----- End of picture text -----**<br>


8 



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---

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