QS4E_1U Series
0.25W - Single Output DC-DC Converter - Fixed Input - Isolated & Unregulated
DC-DC Converter
0.25 Watt
4 Pin SIL
Efficiency up to 77%
EMI complies with EN55032
Class B
The QS4E_1U series is a family of cost effective 0.25W single output
DC-DC converters. These converters achieve low-cost and ultra-minia-
ture SIP4 pin size. Devices are encapsulated using flame retardant resin.
1KVDC Isolation
Operation temperature range:
-40°C ~ +85°C
Low ripple and noise
Industry Standard Pinout
They are specially designed for applications where an isolated voltage is
required in a distributed power supply system. Such as: digit circuit con-
dition; normal low-frequency artificial circuit condition; relay drive cir-
cuit and data switching circuit condition, etc.
Common specifications
Cooling:
Output specifications
Free air convection
Item
Test condition
Min Typ
Max Units
Operation temperature range:
Storage temperature range:
Casing temperature:
Soldering temperature:
Storage humidity range:
Case material:
-40°C~+85°C
Output voltage
accuracy
See tolerance envelope
graph
-40°C ~+125°C
Line regulation
Load regulation
For Vin change of 1%
1.2
%
100°C MAX
20% to 100% load
• 3.3V output
• others
260°C MAX, 1.5mm from case for 10 sec.
< 95%
20
10
%
%
Ripple & Noise*
20MHz Bandwidth
100% full load
100
mVpk-pk
%/°C
Plastic [UL94-V0]
>1,121,000 hours
IEC 60950-1
Temperature drift
0.02
80
Pin material:
Switching frequency variable
KHz
Safety standard:
MTBF (MIL-HDFK-217F@25°C):
Weight:
0.5mm Alloy42 solder-coated
1.5g / 1.9g (48V)
* Ripple and noise are measured by “parallel cable” method, please see DC-DC
Converter Application Notes for specific operation.
Input specifications
EMC specifications
Item
Test condition
Min
Typ
10
Max
Units
%
CE*
EN55032
CLASS B
Voltage range
RE
EN55032
CLASS B
Reflected ripple
current*
20
mApk-pk
ESD
RS
IEC/EN61000-4-2
IEC/EN61000-4-3
IEC/EN61000-4-4
IEC/EN61000-4-5
IEC/EN61000-4-6
IEC/EN61000-4-8
perf. Criteria A
perf. Criteria A
perf. Criteria A
perf. Criteria A
perf. Criteria A
perf. Criteria A
Surge voltage
• 3.3VDC input
• 5VDC input
• 12VDC input
• 15VDC input
• 24VDC input
• 48VDC input (SIP)
5
VDC
VDC
VDC
VDC
VDC
VDC
EFT**
Surge**
CS
7
15
18
28
54
PFMF
Input filter
Filter capacitor
* Input filter components are required to help meet conducted emission class B,
which application refer to the EMI filter section.
** An external filter is required if the module hast to meet IEC61000-4-4 and
IEC61000-4-5.
* Measured with a simulated source inductance of 12µH and a source capacitor
Cin (47µF, ESR<1.0Ω at 100KHz).
Isolation specifications
Example SIP4 Case:
QS4E_0505S1U
Item
Test condition
Min
Typ
60
Max
Units
VDC
Q= 0,25 Watt; S4= SIP4; E= Pinning; 05= 5 Vin; 05= 5Vout;
S= Single Output; 1= 1kVDC Isolation; U= Unregulated Output
Isolation voltage
Tested for 1 minute
and 1mA max
1000
Isolation resistance
Test at 500VDC
1000
MΩ
pF
Note:
Isolation capaci-
tance
Input-output,
100KHz/0.1V
1. Operation under minimum load will not damage the converter; However, they
may not meet all specification listed, and that will reduce the life of product.
2. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage
and rated output load unless otherwise specified.
3. Only typical models listed, other models may be different, please contact our
technical person for more details.
4. In this datasheet, all the test methods of indications are based on corporate
standards.
Page 1 of 5
QS4E_1U – Rev. 2018-1.0
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com