# Isolated DIN Rail Mount DC/DC Converter, Railway, 2:1, 120 W, 1 Output, 48 V, 2.5 A
**URL**: https://novapart.co/products/DDR-120D-48/isolated-din-rail-mount-dc-converter-railway-21
**SKU**: DDR-120D-48
**Manufacturer**: MEAN WELL
**Category**: Power & Line Protection || Power Supplies || DC / DC Converters || Isolated DIN Rail Mount DC / DC Converters
**Price**: €48.5300
**Stock**: 10+
**Lead Time**: 134 days (indicative)
## Description
No. of Outputs:1 Output; Output Power Max:120W; Output Voltage - Output 1:48V; Output Current - Output 1:2.5A; Output Voltage - Output 2:-; Output Current - Output 2:-; Output Voltage - Output
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Depth | 102mm |
| Width | 32mm |
| Height | 125.2mm |
| Input Ratio | 2:1 |
| Product Range | DDR-120 Series |
| No. Of Outputs | 1 Output |
| Output Power Max | 120W |
| Isolation Voltage | 4kV |
| Output Regulation | - |
| Input Voltage Dc Max | 154V |
| Input Voltage Dc Min | 67.2V |
| Input Voltage Dc Nom | 110V |
| Output Current - Output 1 | 2.5A |
| Output Current - Output 2 | - |
| Output Voltage - Output 1 | 48V |
| Output Voltage - Output 2 | - |
| Power Supply Applications | Railway |
| Dc / Dc Converter Output Type | Fixed, Adjustable |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3002982/)
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M W ee120W DIN Rail Type DC-DC Converter D D R - 1 2 0 series
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mce@?
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## HL CE &s
## @ Features
- Compliance to EN50155 and EN45545- ~~2~~ railway standard
- Width only 32mm
- 2:1 wide input range
- ~~-~~ 40~+70°C wide working temperature
- 150% peak load capability
- DC output adjustable
- Cooling by free air convection
## HM Applications
- Bus,tram,metro or railway system
- Industrial control system
- Semi- ~~c~~ onductor fabrication equipment
- Factory automation
- Electro ~~-~~ mechanical
- Wireless network
- Telecom or datacom system
* Can be installed on DIN rail TS- ~~3~~ 5/7 ~~.~~ 5 or 15
- Protections: Short circuit / Overload / Over voltage / Input reverse polarity/ Input under voltage protection
- 4KVdc I/O isolation(Reinforced isolation)
- 3 years warranty
## @ Description
DDR ~~-1~~ 20 series is a 120W DIN Rail type DC ~~-~~ DC converter with main features including DIN rai ~~l-~~ type easy installation, ultra slim width (32mm), 2:1 wide input voltage, fanless design, ~~-~~ 40~+70°C wide operating temperature, 4KVdc I/O isolation, 150% peak load, adjustable output voltage and full protective functions. This series of models has various input options: 9~18V/ 16 ~~.~~ 8~33 ~~.~~ 6V /33 ~~.~~ 6~67 ~~.~~ 2V /67 ~~.~~ 2~154V and various output options: 12V /24V /48V and can be used for industrial & railway control, security control, communication system and other fields. Suitable applications include DC buck/boost regulator, increasing system insulation level and voltage drop compensation along cable...etc.
## Mi Model Encoding DDR- 120/A|- ~~(~~ 24|
## LL Output voltage(12/24/48Vdc)
Input voltage (A: 9~18Vdc, B:16 ~~.~~ 8~33 ~~.~~ 6Vdc, C:33 ~~.~~ 6~67 ~~.~~ 2Vdc, D:67 ~~.~~ 2~154Vdc) Rated wattage
Series name
File Name:DDR-120 ~~-~~ SPEC 2018 ~~-~~ 12 ~~-~~ 20
|SPECIFICATION|SPECIFICATION||
|---|---|---|
|OUTPUT
INPUT
Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135%
pRoTEction
ENVIRONMENT
EMC EMISSION
[VoltageFlicker
ENGN00~~03-~~3~~fm~~
SAFETY &
[WarmonicCurrent
~~mm~~
EN50121~~-3-2~~ forEMC (except for9~18Vin)
OTHERS [DIMENSION
|92°1252"102mm(WHD)
SS
SO~~SO~~SOSCSSCSC‘(S
1~~.~~ All parameters NOT specially mentioned are measured at normal input (A:12Vdce
, B:24Vdc)
, rated load and 25°C of ambient temperature.
2~~.~~ Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair~~-~~wire terminated with a 0~~.~~1
« f & 47 «f parallel capacitor.
3~~.~~ Tolerance: includes set up tolerance, line regulation and load regulation.
4~~.~~ Derating may be needed under low input voltage. Please check the derating curve for more details.
NOTE
5~~.~~ 3 seconds max.~~,~~ please refer to peak loading curves.
6~~.~~ The power supply is considered as an independent unit, but the final equipment still need to re~~-~~confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.~~”~~
(as available on http:/Awww~~.~~meanwell~~.~~com)
7~~.~~ The ambient temperature derating of 3~~.~~5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than
2000m(6500ft).|||
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||Normally works within 150% rated output power|power for more than 3 seconds and then constant current protection 105~135%|
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||EMC EMISSION
[VoltageFlicker
ENG~~fm~~
[WarmonicCurrent
~~mm~~
EN50121~~-3-2~~ forEMC (except for9~18Vin)
[DIMENSION
|92°1252"102mm(WHD)
SS||
||||
|||ENGN00~~03-~~3|
|||ENGN00~~03-~~3~~fm~~|
|||ENGN00~~03-~~3~~fm~~
~~mm~~|
||||
||||
||||
||||
||||
||||
||[DIMENSION
|92°1252"102mm(WHD)
SS
SO~~SO~~SOSCSSCSC‘(S|SOSCSSCSC‘(S|
||[DIMENSION
|92°1252"102mm(WHD)
SS
1~~.~~ All parameters NOT specially mentioned are measured at normal input (A:12Vdce
, B:24Vdc)
, rated load and 25°C of ambient temperature.
2~~.~~ Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair~~-~~wire terminated with a 0~~.~~1
« f & 47 «f parallel capacitor.
3~~.~~ Tolerance: includes set up tolerance, line regulation and load regulation.
4~~.~~ Derating may be needed under low input voltage. Please check the derating curve for more details.
5~~.~~ 3 seconds max.~~,~~ please refer to peak loading curves.
6~~.~~ The power supply is considered as an independent unit, but the final equipment still need to re~~-~~confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.~~”~~
(as available on http:/Awww~~.~~meanwell~~.~~com)
7~~.~~ The ambient temperature derating of 3~~.~~5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than
2000m(6500ft).||
## SPECIFICATION
7 ~~.~~ The ambient temperature derating of 3 ~~.~~ 5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than 2000m(6500ft).
File Name:DDR-120 ~~-~~ SPEC 2018 ~~-~~ 12 ~~-~~ 20
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**----- Start of picture text -----**
MVi! V| W V 120W DIN Rail Type DC - DC Converter
**----- End of picture text -----**
## D D R ~~-~~ 1 2 0 series
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**----- Start of picture text -----**
SPECIFICATION
**----- End of picture text -----**
|OUTPUT
“er
Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135%
pRoTEction
ENYRONMET
EMCEMISSION
VotageF**c**ker
SS CEN~~SWO~~OOSS
SAFETY &
amonie urent ~~[i~~
OOSOSOC~*d
EN50121~~-3-2~~ for EMC
OTHERS [DIMENSION
=|92°1252102mm(WHD) SS
SSOSC—~—SSC“~S*~S~S™SCS
1. All parameters NOT specially mentioned are measured at normal input (C:48Vdc
, D:110Vdc)
, rated load and 25°C of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair~~-~~wire terminated with a 0~~.~~1 « f & 47 «f parallel capacitor.
3. Tolerance
: includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the derating curve for more details.
5. 3 seconds max.~~,~~ please refer to peak loading curves.
NOTE
6~~.~~ The power supply is considered as an independent unit, but the final equipment still need to re~~-~~confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.~~”~~
(as available on http:/www~~.~~meanwell~~.~~com)
7~~.~~ The ambient temperature derating of 3~~.~~5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than
2000m(6500ft)~~.~~|OUTPUT
“er
Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135%
pRoTEction
ENYRONMET
EMCEMISSION
VotageF**c**ker
SS CEN~~SWO~~OOSS
SAFETY &
amonie urent ~~[i~~
OOSOSOC~*d
EN50121~~-3-2~~ for EMC
OTHERS [DIMENSION
=|92°1252102mm(WHD) SS
SSOSC—~—SSC“~S*~S~S™SCS
1. All parameters NOT specially mentioned are measured at normal input (C:48Vdc
, D:110Vdc)
, rated load and 25°C of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair~~-~~wire terminated with a 0~~.~~1 « f & 47 «f parallel capacitor.
3. Tolerance
: includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the derating curve for more details.
5. 3 seconds max.~~,~~ please refer to peak loading curves.
NOTE
6~~.~~ The power supply is considered as an independent unit, but the final equipment still need to re~~-~~confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.~~”~~
(as available on http:/www~~.~~meanwell~~.~~com)
7~~.~~ The ambient temperature derating of 3~~.~~5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than
2000m(6500ft)~~.~~||
|---|---|---|
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||Normally works within 150% rated output power|power for more than 3 seconds and then constant current protection 105~135%|
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||EMCEMISSION
VotageF**c**ker
SS CEN~~SWO~~
amonie urent ~~[i~~||
|||~~SWO~~OOSS|
|||~~SWO~~OOSS|
|||~~SWO~~OOSS
~~[i~~
OOSOSOC~*d|
|||~~SWO~~OOSS
~~[i~~
OOSOSOC~*d|
||||
||||
||||
||||
||||
||EN50121~~-3-2~~forEMC||
||EN50121~~-3-2~~ for EMC||
||[DIMENSION
=|92°1252102mm(WHD)SS
SSOSC—~—SSC“~S*~S~S™SCS|SSOSC—~—SSC“~S*~S~S™SCS|
||[DIMENSION
=|92°1252102mm(WHD) SS
SSOSC—~—SSC“~S*~S~S™SCS
1. All parameters NOT specially mentioned are measured at normal input (C:48Vdc
, D:110Vdc)
, rated load and 25°C of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair~~-~~wire terminated with a 0~~.~~1 « f & 47 «f parallel capacitor.
3. Tolerance
: includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the derating curve for more details.
5. 3 seconds max.~~,~~ please refer to peak loading curves.
6~~.~~ The power supply is considered as an independent unit, but the final equipment still need to re~~-~~confirm that the whole system complies with
the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.~~”~~
(as available on http:/www~~.~~meanwell~~.~~com)
7~~.~~ The ambient temperature derating of 3~~.~~5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than
2000m(6500ft)~~.~~||
File Name:DDR-120 ~~-~~ SPEC 2018 ~~-~~ 12 ~~-~~ 20
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MEAN WELL}
120W DIN Rail Type DC ~~-~~ DC Converter
D D R ~~-~~ 1 2 0 series
## Hi Input Reverse Polarity Protection
There is a MOSFET connected in series to the negative input line. If the input polarity is connected reversely, the MOSFET opens and there will be no output to protect the unit.
## Bi Input Range and Transient Ability
The series has a wide range input capability. With ~~-~~ 30% / +40% of rated input voltage(exceptA Type), it can withstand that for 1 second.
## Bi Inrush Current
Inrush current is suppressed by a current limit circuit during the initial start ~~-~~ up, and then the circuit is bypassed by a MOSFETto reduce power consumption after accomplishing the start ~~-~~ up.
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**----- Start of picture text -----**
; : —_—
Inrush : -..... Normal current
oe : | /
**----- End of picture text -----**
File Name:DDR-120 ~~-~~ SPEC 2018 ~~-~~ 12 ~~-~~ 20
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**----- Start of picture text -----**
MEAN WELL} 120W DIN Rail Type DC - DC Converter D D R - 1 2 0 series
|
H Hold - up Time
D type is in compliance with S2 level (10ms), whileA types are in compliance with S1 level (3ms) at [full] [load] [output] [condition.] [To] [fulfil] [the]
requirements of S2 level (10ms), B types require de -r ating their output load to 70%, C types require de -r ating their output load to 60%,
please refer to the curve diagrams below.
DDR -1 20A -1 2 DDR -1 20A -2 4 DDR -1 20A -4 8
100%gouty | 100%oy LY | | 100%goy yp |
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30% a ee ee 40% PING = a0 H P
ed TNeee 30% NSeee 30% S S
Me QRA DsAee PR 20%Me aEe ES| 20%oerELT
Oms 10ms 20ms 30ms 40ms 50ms 60ms Oms 10ms 20ms 30ms 40ms 50ms_ 60ms Oms 10ms 20ms 30ms 40ms 50ms 60ms
TIME TIME TIME
DDR -1 20B -1 2 DDR -1 20B -2 4 DDR -1 20B -4 8
100% 100% 100%
9 swf Y T | | | | | |] 9m{ Voy yy yy
som) som fh som f----p [TT]
Q 60% — Ee ee 60% ee box A
& 60% . Q 60% Q 60%
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=a20% s 20% a 20% > =
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oy _p_ | ft | | ow | | f t t on _| | J [Jt tT"
Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms
TIME TIME TIME
100% 100% 100%
go%t—p{___so,-_y_|| || [) |) [) 7 | go%soy - ( __y¥_||tT||| | | | goygo% Ec| |__|TC
2 qoy%peesy |__| [of oT oT | 70% Foe | | [| | of of | 70% + | | Tt of tT
SS sox-_t+w_gox-—_w |__|| || || || | TgJo w,e,y,| WKA|ee[ oy oT TT | oy NDA
fog}yL P INQ S Sg Lt N Nf tTS og po}TN
20%208a a
‘0% “0% ‘Om
Oms 10ms 20ms 30ms 40ms S0ms 60ms 70ms 80ms Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms
TIME TIME TIME
DDR -1 20D -1 2 DDR -1 20D -2 4 DDR -1 20D -4 8
100% 100% 100%
soe TNTe le
gowf | \ || [|||]
yow{ |_| 9 SS
QO | NT yom | | Vf tt ty yy yom] Nf
=~ 30%30%a Ny 3030% FESSSS EEE EEE EEE ~ 30%50% a ee
20m | I 2o% {|_| | | | RASA ft 20%} |
rx | [| | | —_—__| 1om |_| [ | | fp | r%| | |
om | | | | | | | "| omit | tT | tT tT tT tT tt yf CgI
Oms 10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms Oms10ms 20ms 30ms40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 120ms 130ms Oms10ms 20ms 30ms 40ms 50ms 60ms 70ms 80ms 90ms 100ms 110ms 120ms 130ms
TIME TIME TIME
**----- End of picture text -----**
File Name:DDR-120 ~~-~~ SPEC 2018 ~~-~~ 12 ~~-~~ 20
MEAN WELL] 120W DIN Rail Type DC ~~-~~ DC Converter D D R ~~-~~ 1 2 0 series ~~ee~~
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**----- Start of picture text -----**
Hi Efficiency vs Load & Vin Curve
The efficiency vs load & Vin curves of each model are shown as below.
DDR -1 20A -1 2 DDR -1 20A -2 4 DDR -1 2A -4 8
= on >on > on
oO (S) oO
2 85% = 85% = 85%
lu —e1vde lu —e 12Vde lu ee 12Vde
LLL 75% —t-10.8Vde LLL 75% te 108 LLLL 75% te 10.8Vde
: — ~s a— : —= “=
uw 70% m 70% ” 7%
LOAD LOAD LOAD
DDR -1 20B -1 2 DDR -1 20B -2 4 DDR -1 20B -4 8
> 9% >= 2% > %
[S) (S) [S)
wuZz % ane luZ 35% 2 luz= x eae
Le 75% LL 556 LL 5%, eee
We Ww ie
uw 7%: ut70% wi 7%
LOAD LOAD LOAD
DDR -1 20C -1 2 DDR -1 20C -2 4 DDR -1 20C -4 8
> 95% > 95% > 8%
Oo % CO 9% O xm
azlu =% lu= 85% rmlu 85%
WwLL % ee WwLL 75% me ore LLLe 73% oN
LU 70% LL 70% LU 70%
: —_= = — = : — =
DDR -1 20D -1 2 DDR -1 20D -2 4 DDR -1 20D -4 8
>>
Zz S LL 85% Zz9 85% SZz 85%
: 80% 10K LLU 80% LU 80% 10
WwLU 70%65% er 13vee WweLLLU 70%)&% eevee LL L eo 70%65% ie ave
LL — = : — = : — “=
LOAD LOAD LOAD
File Name:DDR-120 - SPEC 2018 - 12 - 20
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## Links
- [View this product on Novapart](https://novapart.co/products/DDR-120D-48/isolated-din-rail-mount-dc-converter-railway-21)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/mean-well/ddr-120d-48/dc-dc-converter-48v-2-5a/dp/3002982)
---
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