• 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.
Features
Regulated
Converter
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.
AC/DC Converter
RAC
RAC20-K
20 Watt
2“ x 1“
Single and
Dual Output
3
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 (3)
85-264 / 85-305
±12
±833
84
±1200
RAC20-15DK (3)
85-264 / 85-305
±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
K/277/W
on request
24
x
x
on request
48
N/A
x
on request
12D
x
N/A
N/A
15D
x
N/A
N/A
x = standard portfolio / on request = MOQ may apply on project base / N/A= not available
www.recom-power.com
REV.: 8/2022
RE
H
compliant
M
TS
TS
C
REACH
P
ERP
compliant
LOT6
C
RE
x
T
S
x
CO NVE R
R
on request
15
OU
U
M
E
on request
x
D
IA N
T PRO
O
CO
x
x
PL
C
U
LIA
D
N T PRO
S E HO
LD
x
M
CERTIFIED
EN-60335-1
pp
a
5
12
10 from 10
CO
Notes:
Note3: Add suffix “/277” for wider input voltage range (85-305VAC)
For detail information refer to “Nominal Input Voltage (5, 6)”
without suffix= standard input range 85-264VAC
Note4: Add suffix „W“ for wired version (single output only, “277/W” combination on request)
without suffix= standard THT version
refer to “Model Matrix”
Model Matrix
Model
/277
/W
/277/W
T
RoHS 2 +
compliant
(3)
Single or Dual
C O N V ER
M
S
Input Voltage option
O
R
Output Voltage
C
E
Wired option (4)
nom. Output Power
es
RAC20-
lianc
E224736
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
PA-1
RAC20-K
AC/DC Converter
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
50/60Hz
Nominal Input Voltage (5, 6)
standard version
“/277” version
100VAC
47-63Hz
DC
47-63Hz
DC
85VAC
120VDC
85VAC
120VDC
standard
Operating Range
/277 Versions
240VAC
277VAC
264VAC
370VDC
305VAC
430VDC
115VAC
230VAC
277VAC
Input Current
Inrush Current
cold start at +25°C
No Load Power Consumption
450mA
400mA
300mA
115VAC
230VAC
277VAC
20A
40A
50A
230VAC
40mW
0.5W
Input Power = 1.0W
2.0W
ErP Lot 6 Standby Mode Conformity (Output Load
Capability)
Input Frequency Range
Minimum Load (9)
0.3W
0.7W
1.6W
AC Input
47Hz
single
dual (required for regulation on both outputs)
0%
115VAC
230VAC
277VAC
0.6
0.5
0.45
Power Factor
63Hz
10%
Start-up Time
150ms
Rise Time
40ms
115VAC
230VAC
277VAC
Hold-up Time
12ms
60ms
90ms
Internal Operating Frequency
100kHz
Output Ripple and Noise (7)
5Vout
others
20MHz BW
100mVp-p
1% of Vout
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)
RAC20-05SK(W)
RAC20-12SK(W)
100
100
90
90
80
80
70
70
Efficiency [%]
Efficiency [%]
Efficiency vs. Load
60
50
40
30
115VAC
230VAC
277VAC
20
10
0
60
50
40
30
115VAC
230VAC
277VAC
20
10
0
10
20
30
40
50
60
Output Load [%]
www.recom-power.com
70
80
90
0
100
continued on next page
REV.: 8/2022
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
PA-2
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
RAC20-15DK
RAC20-24SK(W)
100
100
90
90
80
80
70
70
Efficiency [%]
Efficiency [%]
Efficiency vs. Load
60
50
40
30
50
40
30
115VAC
230VAC
277VAC
20
10
0
60
0
10
20
30
40
50
60
70
80
90
115VAC
230VAC
277VAC
20
10
0
100
0
10
20
30
Output Load [%]
40
50
60
70
80
90
100
Output Load [%]
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.
25% load step change
recovery time
Transient Response
4.0% max.
500µs typ.
Notes:
Note8: Operation below 10% load will not harm the converter, but specifications may not be met
Deviation vs. Load
RAC20-05SK(W)
2
1.5
0.5
0
-0.5
0.5
0
-0.5
-1
-1
-1.5
-1.5
0
10
20
30
40
50
60
70
80
90
115VAC
230VAC
277VAC
1
Deviation [%]
Deviation [%]
1.5
115VAC
230VAC
277VAC
1
-2
RAC20-12SK(W)
2
-2
100
0
10
20
30
Output Load [%]
RAC20-15SK(W)
2
0
-0.5
-1
50
60
70
80
90
-2
100
Output Load [%]
www.recom-power.com
100
115VAC
230VAC
277VAC
-0.5
-1.5
40
90
0
-1
30
80
0.5
-1.5
20
70
1
Deviation [%]
Deviation [%]
0.5
10
60
1.5
115VAC
230VAC
277VAC
1
0
50
RAC20-24SK(W)
2
1.5
-2
40
Output Load [%]
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
REV.: 8/2022
PA-3
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
PROTECTIONS
Parameter
Type
Input Fuse (9)
Value
standard version
internal
T3.15A, slow blow type
non, refer to “Protection Circuit”
/277 versions
Short Circuit Protection (SCP)
below 100mW
hiccup, auto recovery
Over Voltage Protection (OVP)
150% - 195%, latch off mode
Over Current Protection (OCP)
110% - 130%, hiccup mode
Over Voltage Category
OVCII
(10)
Class of Equipment
Class II
Isolation Voltage (11)
Isolation Resistance
tested for 1 minute
I/P to O/P
3kVAC
Viso = 500VDC
1GΩ 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
Protection Circuit for /277 Versions
L
N
F
VACin (L)
+Vout
VACin(N)
-Vout
+Vout
-Vout
ENVIRONMENTAL
Parameter
Operating Temperature Range
Condition
@ natural convection 0.1m/s
Value
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
5000m
Operating Altitude (12)
Operating Humidity
non-condensing
20% - 90% RH max.
IP Rating
IP20
Pollution Degree
PD2
Vibration
according to MIL-STD-202G
Design Lifetime
MTBF
10-500Hz, 2G 10min./1cycle, period 60min. along x,y,z axes
+25°C
130 x 10³ hours
+55°C
16 x 10³ hours
according to MIL-HDBK-217F, G.B.
+25°C
+40°C
>1196 x 103 hours
>955 x 103 hours
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
continued on next page
www.recom-power.com
REV.: 8/2022
PA-4
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
Derating Graph
100
(@ Chamber and natural convection 0.1m/s)
90
Output Load [%]
80
70
60
50
40
30
20
10
0
-40
-20
0
20
40
60
55
80
Ambient Temperature [°C]
85
100
Notes:
Note13: Output power derating for Line-input of less than 90VAC (de-rate linearly from 100% at 90VAC to 90% at 85VAC)
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
Report / File Number
Audio/Video, information and communication technology equipment Safety requirements
E224736
Audio/Video, information and communication technology equipment Safety requirements (CB Scheme)
Standard
UL62368-1, 2nd Edition, 2014
CAN/CSA C22.2 Nr. 62368-1-14, 2nd Ed. 2014
IEC62368-1:2014 2nd Edition
E491408-A6008-CB-1
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
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V (CB Scheme)
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V Part 2: Particular requirements (CB Scheme)
Safety of power transformers, power supplies, reactors and similar products for
supply voltages up to 1100 V Part 2: Particular requirements
Safety requirements for power electronic converter systems and equipment - Part 1:
General (CB Scheme)
Safety requirements for power electronic converter systems and equipment - Part 1:
General (LVD)
EAC
LCS180508046AS
IEC60335-1:2010 + AMD2:2016 + COR1:2016
EN60335-1:2012 + A11:2014 + A13:2017
IEC61558-1:2005 2nd Edition + A1:2009
50198090 001
EN61558-1:2005 + A1:2009
IEC61558-2-16:2009 1st Edition + A1:2013
50198090 001
EN61558-2-16:2009 + A1:2013
IEC62477-1:2012 + A1:2016, 1st Edition
CN21R4QC001
EN62477-1:2012 + A11:2014 + A1:2017
RU-AT.03.67361
RoHS2
TP TC 004/2011
RoHS-2011/65/EU + AM-2015/863
EMC Compliance
Condition
Low voltage power supplies, d.c. output Part 3: Electromagnetic compatibility (EMC)
Electromagnetic compatibility of multimedia equipment - Emission requirements
Standard / Criterion
IEC/EN61204-3:2018, Class B
without external filter
Electromagnetic compatibility of household appliances, electric tools and similar
apparatus - Emission Requirements
Information technology equipment - Immunity characters - Limits and methods of measurement
EN55032:2015, Class B
EN55014-1:2006 + A2:2011
EN55024:2010 + A1:2015
continued on next page
www.recom-power.com
REV.: 8/2022
PA-5
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
EMC Compliance
Condition
Standard / Criterion
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
AC Port: ±2.0kV
DC Port: ±2.0kV
Fast Transient and Burst Immunity
AC Port: L-N ±1.0kV
DC Port: ±0.5kV
Surge Immunity
EN61000-4-4:2012, Criteria B
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
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Type
case
potting
PCB
baseplate
Dimension (LxWxH)
Weight
Value
black plastic, (UL94V-0)
silicone, (UL94V-0)
FR4, (UL94V-0)
black plastic, (UL94V-0)
52.5 x 27.4 x 23.0mm
THT
wired
60g typ.
65g typ.
continued on next page
www.recom-power.com
REV.: 8/2022
PA-6
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
Dimension Drawing (mm)
52.5
27.4
embossed logo
Pinning information
51.0
Pin #
1
2
3
4
5
23.0
26.3
Single
VAC in (N)
VAC in (L)
no pin
-Vout
+Vout
Dual
VAC in (N)
VAC in (L)
-Vout
Com
+Vout
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
20.32
6.0 ±1.0
Ø1.0 ±0.1
Recommended Footprint Details
1
3
5
10.16
2
5
10.16
3.50
1
2
18x2.54= 45.72
3.39
4
Top View
2. 54
4
Bottom View
3
2.54
Dimension Drawing Single Wired (mm)
embossed logo
27.4
52.5
51.0
100.0±10
23.0
26.3
Wired information
5 ±2
#
1
2
4
5
Ø2.9
2
Function
VAC in (N)
VAC in (L)
-Vout
+Vout
Wire color
blue
brown
black
red
Type
UL-1015
UL-1015
UL-1015
UL-1015
AWG
18
18
18
18
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
Bottom View
1
www.recom-power.com
4
5
REV.: 8/2022
PA-7
RAC20-K
AC/DC Converter
Series
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
PACKAGING INFORMATION
Parameter
Packaging Dimension (LxWxH)
Packaging Quantity
Type
pin
wired
tube
tray
tube
tray
Storage Temperature Range
Storage Humidity
Value
490.0 x 56.0 x 40.0mm
488.0 x 202.0 x 47.0mm
15pcs
20pcs
-40°C to +85°C
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.
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REV.: 8/2022
PA-8
