BAC3 Series
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Isolated 3W Regulated Single Output AC/DC Converters
W
V
3
3
3
5
12
24
A
230V
115V
Typ. Max. Typ. Max. Min. Typ. Min. Typ.
mVp-p
FEATURES
UL62368-1 recognised
EN62368-1 certified
IEC61558-1 & IEC61558-2-16 certified
ANSI/AAMI ES60601-1, 1 MOPP/2 MOOP
recognition pending
Wide input voltage range 85-264VAC/
120-370VDC
Operating temperature range –40°C to
85°C
4.7kVDC isolation ‘Hi Pot Test’
BAC3S05DC
BAC3S12DC
BAC3S24DC
Short circuit protection
No external components required
The BAC3 series delivers an output power of 3
watts from -40°C to 65°C, operating up to 85°C
with derating, from AC or DC input voltages.
The BAC3 series small footprint is EMC class
B compliant without the need of any external
components. The BAC3 series is suited to medical
applications with 1 MOPP and 2 MOOP.
With high efficiency at low loads and low no load
power consumption, the BAC3 supports standby
mode operation for applications in industrial,
medical, automation, IOT as well as household
and home automation.
45
60
150
%
60
100
200
75
77
78
77
80
81
72
74.5
76
75
77
78
kHrs
993 20443
1021 22386
1059 24680
45
45
45
Conditions
Min.
Typ.
Max.
Units
Voltage range
All input types
All input types
85
120
47
115/230
264
370
63
VAC
VDC
Hz
kHz
mA
mA
Input frequency
Switching frequency
Input current
Inrush current
Input leakage current
Nominal Vin = 115VAC
Nominal Vin = 230VAC
Nominal Vin = 115VAC
Nominal Vin = 230VAC
250VAC
BAC3S05DC
No load power
consumption
BAC3S12DC
BAC3S24DC
115VAC
230VAC
115VAC
230VAC
115VAC
230VAC
50/60
64
65
40
11
23
25
67
150
46
129
101
155
A
μA
mW
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
PRODUCT OVERVIEW
60
100
200
Parameter
Primary side regulation
Meets EMC class B with no external
components
0.6 45
0.25 50
0.125 120
pF
INPUT CHARACTERISTICS
5V, 12V & 24V single regulated outputs
Over current protection
230V
MTTF1
Telcordia
115V
Efficiency
MIL 217
Ripple & Noise
Isolation Capacitance
Output Current
Order Code
Output Voltage
Output Power
SELECTION GUIDE
Resistance
Safety
standard
UL62368-1
EN62368-1
ANSI/AAMI
ES60601-12
Conditions
Min.
Production tested for 1 second
Qualification tested for 1 minute
Viso = 1000VDC
4700
4700
100
Reinforced
1 MOPP & 2 MOOP
Typ.
Max.
Units
VDC
MΩ
240
240
Creepage and
clearance 8.4mm
Vrms
240
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Operation
Storage
Product temperature rise
above ambient
Convection cooling 0.2m/s
-40
-40
BAC3S24DC
All others
Typ.
Max.
85
85
15
20
Units
°C
1. Calculated using MIL-HDBK-217F and Telcordia SR-332 calculation model at TA=25°C with nominal input voltage 115VAC at full
load.
2. ANSI/AAMI ES60601-1 recognition is currently pending.
For full details go to
https://www.murata.com/englobal/products/power/rohs
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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KAC_BAC3C.B01 Page 1 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
Minimum load
Initial voltage accuracy
All output types
Line regulation
Low line to high line
Min.
BAC3S24DC
All others
115VAC
Load regulation
Typ.
Max.
±0.2
±0.05
±0.3
±0.1
±0.2
±0.1
±4
±0.5
±0.5
±1
±1
±1
±1
0.05
10
10% total load to 100% total load
230VAC
BAC3S05DC
All others
BAC3S05DC
All others
Temperature coefficient
Transient response
Current limit inception
Hold up time
Peak deviation - 50-75% & 75-50% swing
Settling time (within 1% Vout Nom.)
BAC3S05DC
BAC3S12DC
BAC3S24DC
115VAC
±2
2
160
150
130
25
230VAC
125
Units
%
%
%
%
%/°C
%Vout
ms
%
ms
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Input voltage
Continuous, automatic recovery
277VAC
Lead temperature 1.0mm from case for 7 +2/-0 seconds
(to JEDEC JESD22-B106)
270±5°C
Shelf life (1 year)
Wave Solder
Please refer to reconditioning application notes.
Wave Solder profile not to exceed the profile recommended in IEC 61760-1 Section 6.1.3.
Please refer to application notes for further information.
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KAC_BAC3C.B01 Page 2 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test
voltage, applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions BAC3 series of AC/DC converters are all 100% production tested at their stated isolation voltage. This is 4.7kVDC for 1 second.
The BAC3 has been recognised by Underwriters Laboratory to 240Vrms for Reinforced Insulation.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on
materials, construction and environment. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be
reduced by 20% from specified test voltage.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The BAC3 series is pending recognition by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 1 MOPP (Means Of Patient Protection) and 2 MOOP (Means Of
Operator Protection) based upon a working voltage of 240Vrms max., between Primary and Secondary. File number E202895 applies.
EN62368-1
The BAC3 series has been certified by Demko (D) to EN62368 for reinforced insulation to a working voltage of 240Vrms. File number D-07177 applies.
UL62368-1
The BAC3 series has been recognised by Underwriters Laboratory (UL) to UL62368 for reinforced insulation to a working voltage of 240Vrms. File number E151252 applies.
Creepage and clearance 8.4mm
Working altitude OVC II 5000m
IEC61558-1 & IEC61558-2-16
The BAC3 series has been certified by TUV SUD to IEC61558-1 & IEC61558-2-16.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260ºC for 10 seconds based on IEC 61760-1.
Please refer to application notes for further information. The pin termination finish on this product series is Hot Dipped over Matte Tin with Nickel
Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata.com/en-global/
products/rohs
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KAC_BAC3C.B01 Page 3 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
ENVIRONMENTAL VALIDATION TESTING
The following tests have been conducted on this product series, as part of our design verification process. The datasheet characteristics specify user operating conditions for this
series, please contact Murata if further information about the tests is required.
Test
Standard
Condition
Temperature cycling
Humidity bias
Storage life
JEDEC JESD22-A104
JEDEC JESD22-A101
JEDEC JESD22-A103
200 cycles. -40°C to 105°C, 15 minutes hold at each extreme including transitions.
85±2°C, 85±5% R.H. for 1000 (+168/-24) hours
105°C +10/-0°C for ≥1000 hours
Vibration
BS EN 61373 with respect to BS EN
5 – 150Hz. Level at each axis – Vertical, Traverse and Longitudinal: 5.72m/s2 rms. 5 hours in each axis. Crest
60068-2-64, Test Fh Category 1 Class B. factor: 3 Sigma. Device is secured via the pins.
Shock
BS EN 61373: Category 1 Class B
Test is 30ms duration, 3 shocks in each sense of 3 mutually perpendicular axes (18 shocks total). Level at each
axis as follows: Vertical, Traverse and Longitudinal: 50m/s2. Device is secured via pins.
Solderability
EIA/IPC/JEDEC J-STD-002 Test A1
Parts are baked for 4 hours at a temperature of 155°C, within 72 hours they are dipped in flux for 10 seconds.
Followed by dipping the parts in a solder pot at 255°C ±5°C for 5 seconds (96SC tin/silver/copper)
Solder Heat
JEDEC JESD22-B106
The test sample is subjected to a molten solder bath at 270°C ±5°C for 7 +2/-0 seconds (96SC tin/silver/
copper). The leads are dipped in the solder bath to within 1mm of the device body.
Solder Heat (Hand)
Solvent cleaning
MIL-STD-202 Method 210, Condition A
Resistance to cleaning agents
The soldering iron is heated to 350°C ± 10°C and applied to the terminations for a duration of 4 to 5 seconds.
Solvent – Novec 71IPA & Topklean EL-20A. Pulsed ultrasonic immersion 45°C - 65°C
Solvent Resistance
MIL-STD-883 Method 2015
The parts and the bristle portion of the brush are immersed in Isopropanol for a minimum of 1 minute. The
parts are brushed 3 times, after the third time the parts are blown dry and inspected.
Lead Integrity (Adhesion) MIL-STD-883 Method 2025
Leads are bent through 90º until a fracture occurs.
Lead Integrity (Fatigue)
MIL-STD-883 Method 2004, Condition B1 The leads are bent to an angle of 15º. Each lead is subjected to 3 cycles.
Lead Integrity (Tension/
Pull)
MIL-STD-883 Method 2004, Condition A1 Pull of 0.227kg applied for 30 seconds. The force is then increased until the pins snap.
EMC/ESD STANDARDS
Conducted emissions
Radiated emissions
ESD immunity
EN55032/FCC class B
EN55032/FCC class B
IEC/EN 61000-4-2, Level 1, criteria A
Radiated, radio-frequency, electromagnetic field immunity
IEC/EN61000-4-3, 10V/m perf criteria A
10V/m 80-1000MHz
3V/m 1.4-2.0GHz
1V/m 2.0-2.7GHz
All 80% 1kHz am mod all perf criteria A
EFT/burst
Surge immunity
Conducted field immunity
Power frequency magnetic field immunity
Harmonic current emissions
Voltage changes, voltage fluctuations and flicker
Voltage dips, short interruptions and variations
IEC/EN61000-4-4, 2kV, perf criteria A
IEC/EN61000-4-5, 1kV perf criteria A
IEC/EN61000-4-6, 10 Vrms 0.15-80MHz 80% 1kHz am mod perf criteria A
IEC/EN61000-4-8, 50Hz/60Hz 30 A/m perf criteria A
IEC/EN61000-3-2
IEC/EN61000-3-3
IEC/EN61000-4-11, 100% for 20ms, 60% for 200ms, 30% for 500ms and 100% for 5s
perf criteria A-A-A-C.
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KAC_BAC3C.B01 Page 4 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
PART NUMBER STRUCTURE
BAC 3 S XX D C
Series name
RoHS compliant
Power rating
Package type
S - SIP
D - DIP
M - Surface mount
Z - ZIP
Output type
S - Single
D - Dual
Output voltage
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
10μF electrolytic capacitor
Differential Mode Noise Test Schematic
Oscilloscope
3
Load
-Vout
4
2
5
1
+
10μF
+Vout
Twisted wire: #20AWG-30cm
APPLICATION NOTES
Output Capacitance and start-up times
The BAC3 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed:
Part No.
BAC3S05DC
BAC3S12DC
BAC3S24DC
Maximum Load Capacitance
Load capacitance to meet
start-up
Start-up times with maximum load capacitance
Start up times with 10μF
μF
820
330
180
μF
10
10
10
ms
1800
730
730
ms
510
310
300
When operational in an application will operate down to -40°C. For start-up below nominal input voltage ≤115VAC, at very low temperatures, please refer the temperature
derating graphs.
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KAC_BAC3C.B01 Page 5 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
APPLICATION NOTES (Continued)
Minimum Load
The minimum load to meet full datasheet specification is 10% of the full rated load across the specified input voltage range.
Reconditioning
This series contains electrolytic capacitors, which require reconditioning if the product is stored non-powered for more than 2 years from the date of manufacture. To recondition the capacitors, an AC input voltage should be applied with output loading for 10 minutes. For further information please contact Murata.
EFFIECIENCY VS LOAD
BAC3S12DC
90
90
80
80
70
70
60
60
50
85V
115V
40
230V
Efficiency (%)
Efficiency (%)
BAC3S05DC
50
85V
115V
40
230V
264V
264V
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
Load (%)
0
10
20
30
40
50
60
70
80
90
100
Load (%)
BAC3S24DC
90
80
70
Efficiency (%)
60
50
85V
115V
40
230V
264V
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Load (%)
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KAC_BAC3C.B01 Page 6 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
TEMPERATURE DERATING - PART OPERATIONAL
BAC3S05DC
BAC3S12DC
100%
100%
90%
90%
80%
80%
70%
70%
60%
85VAC
50%
115Vac
230VAC
40%
Load (%)
Load (%)
60%
85VAC
50%
115VAC
230VAC
40%
264VAC
264VAC
30%
30%
20%
20%
10%
10%
0%
0%
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-40
100
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
Temperature (°C)
BAC3S24DC
100%
90%
80%
70%
Load (%)
60%
85VAC
50%
115VAC
230VAC
40%
264VAC
30%
20%
10%
0%
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
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KAC_BAC3C.B01 Page 7 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
TEMPERATURE DERATING - COLD STARTUP
BAC3S05DC
BAC3S12DC
100%
100%
90%
90%
80%
80%
70%
70%
60%
85VAC
50%
115VAC
230VAC
40%
Load (%)
Load (%)
60%
85VAC
50%
115VAC
230VAC
40%
264VAC
264VAC
30%
30%
20%
20%
10%
10%
0%
0%
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-40
100
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
Temperature (°C)
BAC3S24DC
100%
90%
80%
70%
Load (%)
60%
85VAC
50%
115VAC
230VAC
40%
264VAC
30%
20%
10%
0%
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
Temperature (°C)
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KAC_BAC3C.B01 Page 8 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
Pin
All dimensions in mm.
Unless otherwise specified all pins within ±0.30 of true position.
Function
AC(N)
2
AC(L)
3
NC
4
-Vout
5
+Vout
Weight: 18g
TUBE OUTLINE DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
Unless otherwise specified all dimensions in mm.
Tube Length : 550mm±2.0.
1
Tube Quantity : 20
The isolation barrier shown must not have any copper traces even on internal layers. This is to avoid
compromising the creepage and clearance distance. PCB layouts must take into consideration the required
clearance and creepage requirements to maintain the clearance and creepage of the isolation barrier.
All dimensions in mm.
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KAC_BAC3C.B01 Page 9 of 10
BAC3 Series
Isolated 3W Regulated Single Output AC/DC Converters
DISCLAIMER
Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical
applications.
Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe
damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard products for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use.
These applications include but are not limited to:
•
Aircraft equipment
•
Aerospace equipment
•
Undersea equipment
•
Power plant control equipment
•
Medical equipment
•
Transportation equipment ( automobiles, trains, ships, etc.)
•
Traffic signal equipment
•
Disaster prevention / crime prevention equipment
•
Data Processing equipment
Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any application or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The
suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and
liability of the buyer.
Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold
Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/
or life-critical applications.
Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: https://www.murata.com/en-eu/products/power/requirements
Murata Power Solutions (Milton Keynes) Ltd. makes no representation that the use of its products in the circuits described herein, or the use
of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do
not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change
without notice.
© 2023 Murata Power Solutions (Milton Keynes) Ltd.
www.murata.com
KAC_BAC3C.B01 Page 10 of 10