RAC
AC/DC Converter
20 Watt
2“ x 1“
Single and
Dual Output
www.recom-power.com REV.: 7/2021 PA-1
3
Description
The RAC20-K series are highly efficient PCB-mount power conversion modules with ultra-low
energy losses especially in light load conditions, making them a benchmark for always-on and standby
mode operations, which are typically coming along with IoT and smart applications. The power supply
units cover worldwide mains input range of 85VAC up to 305VAC and come with international safety
certifications for industrial, AV and ITE as well as household standards. These AC/DC modules operate
in a temperature range of -40°C to +85°C with up to 5000m operating altitude and offer fully protected
single or dual outputs as well as EMC class B compliance without the need of any external components
in floating connections. Modified versions for OVC III requirements are available on request.
Features
Regulated
Converter
• Wide input range 85-264VAC / 85-305VAC
• Standby mode optimized PSU (ENER Lot 6)
• Operating Altitude up to 5000m
• Operating temperature range: -40°C to +85°C
• Class
II
installations (without FG)
• EMC compliant without external components
• No load power consumption 40mW typ. RAC20-K
Selection Guide
Part Input Output Output Efficiency Max. Capacitive
Number Voltage Range Voltage Current typ (1) Load
(2)
[VAC] [VDC] [mA] [%] [µF]
RAC20-05SK (3,4) 85-264 / 85-305 5 4000 84 10000
RAC20-12SK (3,4) 85-264 / 85-305 12 1670 86 8000
RAC20-15SK (3,4) 85-264 / 85-305 15 1333 86 1500
RAC20-24SK (3,4) 85-264 / 85-305 24 830 85 1000
RAC20-48SK (3) 85-264 48 410 85 330
RAC20-12DK 85-264 ±12 ±833 84 ±1200
RAC20-15DK 85-264 ±15 ±670 84 ±1000
Notes:
Note1: Efficiency is tested at 230VAC input and constant resistive load at +25°C ambient
Note2: Max Cap Load is tested at nominal input and full resistive load
Model Numbering
Ordering Examples:
RAC20-05SK 85-264VAC 5Vout Single Output THT
RAC20-05SK/W 85-264VAC 5Vout Single Output wired
RAC20-12DK 85-264VAC 12Vout Dual Output THT
RAC20-05SK/277 85-305VAC 5Vout Single Output THT
RAC20-15SK/277 85-305VAC 15Vout Single Output THT
nom. Output Power
Output Voltage
Input Voltage option (4)
Wired option
Single or Dual
RAC20- K/W/277
Notes:
Note3: Add suffix „W“ for wired version (only single output)
without suffix, standard THT version
Note4: Add suffix “/277” for wider input voltage range (85-30VAC)
For more information refer to “Nominal Input Voltage (5, 6)”
E224736
ERP
compliant
LOT6
H
O
U
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E
H
O
L
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p
p
l
i
a
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e
s
EN-60335-1
CERTIFIED
R
E
C
O
M
C
O
N
V
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R
S
C
O
M
P
L
I
A
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R
O
D
U
C
T
S
REACH
compliant
R
E
C
O
M
C
O
N
V
E
R
T
E
R
S
C
O
M
P
L
I
A
N
T
P
R
O
D
U
C
T
S
RoHS
2
+
compliant
10 from 10
IEC/EN62368-1 certified
UL62368-1 certified
CAN/CSA-C22.2 No. 62368-1-14 certified
IEC/EN60335 certified *
IEC/EN61558-1 certified *
IEC/EN61558-2-16 certified *
IEC/EN61204-3 compliant *
EN55032/14 compliant *
EN55024 compliant *
CB Report
* „/277“ models pending
AC/DC Converter
www.recom-power.com REV.: 7/2021 PA-2
RAC20-K
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Internal Input Filter Pi type
Nominal Input Voltage (5, 6) 50/60Hz standard version
“/277” version 100VAC 240VAC
277VAC
Operating Range
standard 47-63Hz
DC
85VAC
120VDC
264VAC
370VDC
/277 Versions 47-63Hz
DC
85VAC
120VDC
305VAC
430VDC
Input Current
115VAC
230VAC
277VAC
450mA
400mA
300mA
Inrush Current cold start at +25°C
115VAC
230VAC
277VAC
20A
40A
50A
No Load Power Consumption 230VAC 40mW
ErP Lot 6 Standby Mode Conformity (Output Load
Capability) Input Power =
0.5W
1.0W
2.0W
0.3W
0.7W
1.6W
Input Frequency Range AC Input 47Hz 63Hz
Minimum Load (9) single
dual (required for regulation on both outputs)
0%
10%
Power Factor
115VAC
230VAC
277VAC
0.6
0.5
0.45
Start-up Time 150ms
Rise Time 40ms
Hold-up Time
115VAC
230VAC
277VAC
12ms
60ms
90ms
Internal Operating Frequency 100kHz
Output Ripple and Noise (7) 20MHz BW 5Vout
others
100mVp-p
1% of Vout
continued on next page
Efficiency vs. Load
Notes:
Note5: The products were submitted for safety files at AC-Input operation
Note6: Refer to “Derating Graph”
Note7: Measurements are made with a 1.0µF MLCC across output (low ESR)
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
115VAC
230VAC
277VAC
RAC20-05SK(W)
0 10 20 30 40 50 60 70 80 90
100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
115VAC
230VAC
277VAC
RAC20-12SK(W)
AC/DC Converter
REGULATIONS
Parameter Condition Value
Output Accuracy ±2.0% typ.
Line Regulation low line to high line ±0.5% typ.
Load Regulation (8) 10% to 100% load 2.0% typ.
Cross Regulation dual output only ±10.0% typ.
Transient Response 25% load step change
recovery time
4.0% max.
500µs typ.
www.recom-power.com REV.: 7/2021 PA-3
RAC20-K
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
115VAC
230VAC
277VAC
RAC20-15DK
0 10 20 30 40 50 60 70 80 90
100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
115VAC
230VAC
277VAC
RAC20-24SK(W)
2
1
0
-1
1.5
0.5
-0.5
-1.5
-2
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
115VAC
230VAC
277VAC
Deviation vs. Load RAC20-05SK(W)
2
1
0
-1
1.5
0.5
-0.5
-1.5
-2
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
115VAC
230VAC
277VAC
RAC20-12SK(W)
Efficiency vs. Load
Notes:
Note8: Operation below 10% load will not harm the converter, but specifications may not be met
2
1
0
-1
1.5
0.5
-0.5
-1.5
-2
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
115VAC
230VAC
277VAC
RAC20-15SK(W)
2
1
0
-1
1.5
0.5
-0.5
-1.5
-2
Deviation [%]
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
115VAC
230VAC
277VAC
RAC20-24SK(W)
AC/DC Converter
www.recom-power.com REV.: 7/2021 PA-4
RAC20-K
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
PROTECTIONS
Parameter Type Value
Input Fuse (9) internal standard version T3.15A, slow blow type
/277 versions non, refer to “Protection Circuit”
Short Circuit Protection (SCP) below 100mWhiccup, auto recovery
Over Voltage Protection (OVP) 150% - 195%, latch off mode
Over Current Protection (OCP) 110% - 130%, hiccup mode
Over Voltage Category (10) OVCII
Class of Equipment Class II
Isolation Voltage (11)
I/P to O/P tested for 1 minute 3kVAC
Isolation Resistance V
iso
= 500VDC 1GW min.
Isolation Capacitance 100pF max.
Insulation Grade reinforced
Leakage Current 0.25mA max.
Notes:
Note9: Refer to local safety regulations if input over-current protection is also required
/277 Versions have no fuse integrated, it is recommended to use an external fuse recognized by
UL or evaluated by TUV, refer to below schematic
Note10: For OVC III requirements please contact RECOM tech support for advice
Note11: For repeat Hi-Pot testing, reduce the time and/or the test voltage
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range @ natural convection 0.1m/s full load -40°C to +55°C
refer to “Derating Graph” -40°C to +85°C
Maximum Case Temperature +95°C
Temperature Coefficient 0.05%/K
Operating Altitude (12) 5000m
Operating Humidity non-condensing 20% - 90% RH max.
IP Rating IP20
Pollution Degree PD2
Vibration according to MIL-STD-202G 10-500Hz, 2G 10min./1cycle, period 60min. along x,y,z axes
Design Lifetime +25°C 130 x 10³ hours
+55°C 16 x 10³ hours
MTBF according to MIL-HDBK-217F, G.B. +25°C
+40°C
>1196 x 103 hours
>955 x 103 hours
continued on next page
-Vout
+Vout
L N
F
VAC
in
(L)
VAC
in
(N)
+Vout
-Vout
Protection Circuit for /277 Versions
Notes:
Note12: Recognized by safety agency for safe operation up to 5000m. High altitude operation may impact the performance and lifetime.
Please contact RECOM tech support for advice
AC/DC Converter
www.recom-power.com REV.: 7/2021 PA-5
RAC20-K
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
-20-40 0 20 40 60 80 100
100
80
60
40
90
70
50
30
20
10
0
Ambient Temperature [°C]
55 85
Derating Graph
(@ Chamber and natural convection 0.1m/s)
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report / File Number Standard
Audio/Video, information and communication technology equipment -
Safety requirements E224736 UL62368-1, 2nd Edition, 2014
CAN/CSA C22.2 Nr. 62368-1-14, 2nd Ed. 201
4
Audio/Video, information and communication technology equipment -
Safety requirements (CB Scheme) E491408-A6008-CB-1
IEC62368-1:2014 2nd Edition
Audio/Video, information and communication technology equipment -
Safety requirements (LVD)
EN62368-1:2014 + A11:2017
Household and similar electrical appliances – Safety – Part 1: General requirements LCS180508046AS
(“/277” models pending”
IEC60335-1:2010 + AMD2:2016 + COR1:2016
EN60335-1:2012 + A11:2014 + A13:2017
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V
(CB Scheme)
50198090 001
(“/277” models pending”
IEC61558-1:2005 2nd Edition + A1:2009
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V
EN61558-1:2005 + A1:2009
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V Part 2: Particular requirements
(CB Scheme)
50198090 001
(“/277” models pending”
IEC61558-2-16:2009 1st Edition + A1:2013
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V Part 2: Particular requirements
EN61558-2-16:2009 + A1:2013
EAC RU-AT.03.67361 TP TC 004/2011
RoHS2 RoHS-2011/65/EU + AM-2015/863
EMC Compliance (“/277” models pending) Condition Standard / Criterion
Low voltage power supplies, d.c. output Part 3: Electromagnetic compatibility (EMC)
IEC/EN61204-3:2018, Class B
Electromagnetic compatibility of multimedia equipment - Emission requirements
without external filter
EN55032:2015, Class B
Electromagnetic compatibility of household appliances, electric tools and similar
apparatus - Emission Requirements EN55014-1:2006 + A2:2011
Information technology equipment - Immunity characters - Limits and methods of measurement
EN55024:2010 + A1:2015
Electromagnetic compatibility of household appliances, electric tools and similar
apparatus - Immunity Requirements
EN55014-2:2015
ESD Electrostatic discharge immunity test
Air ±8kV, Contact ±4kV
EN61000-4-2:2009, Criteria B
Radiated, radio-frequency, electromagnetic field immunity test
80MHz - 6GHz: 10V/m
1.4GHz - 2GHz: 3V/m
2.0GHz - 2.7GHz: 1V/m
EN61000-4-3:2006 + A1:2008, Criteria A
continued on next page
Notes:
Note13: Output power derating for Line-input of less than 90VAC (derate linearly from 100% at 90VAC to 90% at 85VAC)
AC/DC Converter
RAC20-K
Series
www.recom-power.com REV.: 7/2021 PA-6
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Material
case
potting
PCB
baseplate
black plastic, (UL94V-0)
silicone, (UL94V-0)
FR4, (UL94V-0)
black plastic, (UL94V-0)
Dimension (LxWxH) 52.5 x 27.4 x 23.0mm
Weight pin
wired
60g typ.
65
g typ.
continued on next page
Bottom View
20.32
52.5
51.0 26.3
27.423.0
6.0 ±1.0
Ø1.0 ±0.1
10.1610.16
3.50
3.39 2.54
2. 54
18x2.54= 45.72
embossed logo
Top View
2
1
1
2
5
5
3
3
44
Recommended Footprint Details
Pinning information
Pin # Single Dual
1 VAC in (N) VAC in (N)
2 VAC in (L) VAC in (L)
3 no pin -Vout
4 -Vout Com
5 +Vout +Vout
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
Dimension Drawing (mm)
EMC Compliance Condition Standard / Criterion
Fast Transient and Burst Immunity AC Port: ±2.0kV
DC Port: ±2.0kV EN61000-4-4:2012, Criteria B
Surge Immunity AC Port: L-N ±1.0kV
DC Port: ±0.5kV EN61000-4-5:2014 + A1:2017, Criteria B
Immunity to conducted disturbances, induced by radio-frequency fields AC Port: 10V
DC Port: 10V EN61000-4-6:2014, Criteria A
Power Magnetic Field Immunity 50Hz, 30A/m EN61000-4-8:2010, Criteria A
Voltage Dips and Interruptions
Voltage Dips 20%
Voltage Dips 30%
Voltage Dips 60%
Voltage Dips 100%
Voltage Interruptions > 95%
EN61000-4-11:2004 + A1:2017, Criteria C
EN61000-4-11:2004 + A1:2017, Criteria C
EN61000-4-11:2004 + A1:2017, Criteria C
EN61000-4-11:2004 + A1:2017, Criteria B
EN61000-4-11:2004 + A1:2017, Criteria C
Limits of Voltage Fluctuations & Flicker EN61000-3-3:2013
Limitations on the amount of electromagnetic interference allowed from digital and electronic devices
FCC 47 CFR Part 15 Subpart B, Class B
American National Standard for Methods of Measurement of Radio-Noise Emissions from
Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz
ANSI C63.4-2014, Class B
Notes:
Note14: If output is connected to GND, please contact RECOM tech support for advice
AC/DC Converter
www.recom-power.com REV.: 7/2021 PA-7
RAC20-K
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimension (LxWxH) pin
wired
tube
tray
490.0 x 56.0 x 40.0mm
488.0 x 202.0 x 47.0mm
Packaging Quantity tube
tray
15pcs
20pcs
Storage Temperature Range -40°C to +85°C
Storage Humidity non-condensing 20% to 90% RH max.
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer.
The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or
cause
loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the
unauthorized
use of RECOM products in such safety-critical applications.
Wired information
# Function Wire color Type AWG
1 VAC in (N) blue UL-1015 18
2 VAC in (L) brown UL-1015 18
4 -Vout black UL-1015 18
5 +Vout red UL-1015 18
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
Dimension Drawing Single Wired (mm)
Bottom View
52.5
51.0 26.3
27.423.0
embossed logo
100.0±10
2
1 5
4
Ø2.9
5 ±2