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Mean Well SRS-4809 DC-DC Converter - 0.5W - 43.2~52.8V in 9V out
Overview
SRS-4809 is the 9V output model of this series: rated power 0.5W, typical efficiency 60%.
Features
- 1500VDC I/O isolation
- Internal SMD technology
- Built-in EMI filter
- Cooling by free air convection
- Non-conductive plastic case
- Dual in line package
- 100% burn-in test
- Low cost / High reliability
- Approvals: FCC / EAC / CE / UKCA
- 2 years warranty
Specifications
OUTPUT
- DC VOLTAGE
- 9V
- CURRENT RANGE
- 0 ~ 56mA
- EFFICIENCY (TYP.)
- 60%
- RATED POWER
- 0.5W
- RIPPLE & NOISE (max.)Note.2
- 100mVp-p
- LINE REGULATION
- ±1.0%
- LOAD REGULATIONNote.3
- ±1.0%
- VOLTAGE ACCURACY
- ±2.0%(Typ.) ±3.0%(max.)
- SWITCHING FREQUENCY
- 50KHz min.
INPUT
- VOLTAGE RANGE
- 43.2 ~ 52.8V
- NORMAL VOLTAGE
- 48V
- INPUT CURRENT Full load
- 19mA
- INPUT CURRENT No load
- 5mA
- FILTER
- Capacitor type
- PROTECTION
- Fuse recommended
PROTECTION (Note. 4)
- OVERLOAD
- 150 ~ 350% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
- SHORT CIRCUIT
- All output equipped with short circuit Protection type : Hiccup mode, recovers automatically after fault condition is removed
ENVIRONMENT
- WORKING TEMP.
- -25 ~ +71℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20% ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -25 ~ +105℃, 10 ~ 95% RH
- TEMP. COEFFICIENT
- ±0.03% / ℃(0 ~ 50℃)
- VIBRATION
- 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
SAFETY & EMC
- SAFETY STANDARDS
- EAC TP TC 020/2011 approved
- WITHSTAND VOLTAGE
- I/P-O/P:1.5KVDC
- ISOLATION RESISTANCE
- I/P-O/P: 100M Ohms / 500VDC / 25℃/ 70% RH
- ISOLATION CAPACITANCE
- 80pF max.
- EMC EMISSION
- Compliance to BS EN/EN55032 Class B, FCC part 15 Class B, EAC TP TC 020
- EMC IMMUNITY
- Compliance to BS EN/EN61000-4-2,3,4,5,6,8, light industry level, criteria A, EAC TP TC 020
OTHERS
- MTBF
- 600khrs min. MIL-HDBK-217F(25℃)
- DIMENSION
- 22.6*9.9*8.9mm or 0.89"*0.39"*0.35" inch (L*W*H)
- PACKING
- 3.1g ; 22pcs/per tube, 3080pcs/140 tube/per carton
Test conditions and notes4
- 1.All parameters are specified at normal input, rated load, 25℃ 70% RH ambient.
- 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf & 47uf capacitor.
- 3.Load regulation is measured from 10% to 100% rated load.
- 4.Please prevent the converter from operating in overload or short circuit condition for more than 30 seconds.
Technical drawings
Downloads
FAQ
Can I use the SRS-4809 for a low-power 9V circuit inside 48V telecom or automation equipment?
Yes, it is designed to provide a 9V constant-voltage output from a 43.2 to 52.8V input range. At 0.5W, it is better suited to low-power control, sensing, or interface circuits than to heavier 9V loads.
Is the SRS-4809 a fit for embedded 9V electronics on a 48V system backplane?
It is a reasonable fit when the source is within 43.2 to 52.8V and the embedded 9V section only needs up to 0.5W. Its 22.6 x 9.9 x 8.9 mm size also helps in dense board-level or module-level designs.
Can this model support a small 9V signal-conditioning or analog stage in industrial equipment?
It can be used where a regulated 9V rail is needed from a 43.2 to 52.8V input and the load stays within 0.5W. That makes it more appropriate for compact analog or signal-conditioning sections than for high-draw 9V devices.
Can the SRS-4809 be used in unheated cabinets or warm equipment compartments?
The specified operating range is -25°C to +71°C, so it is suitable for a broad range of cabinet temperatures. Since no IP rating is provided, it should be used in protected indoor enclosures rather than directly exposed outdoor environments.
What are the main differences between the 48V-input SRS-4809 and its sibling models?
All 48V-input SRS versions share the same 0.5W rating and 43.2 to 52.8V input range. The outputs differ: SRS-4805 is 5V and 100mA, SRS-4809 is 9V and 56mA, SRS-4812 is 12V and 42mA, and SRS-4815 is 15V and 34mA.
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