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Mean Well

Mean Well SRS-2405 DC-DC Converter - 0.5W - 21.6~26.4V in 5V out

SKU SRS-2405
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Overview

SRS-2405 is the 5V 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

SRS-2405Specifications from the official datasheet (2024-08-02 edition)

OUTPUT

DC VOLTAGE
5V
CURRENT RANGE
0 ~ 100mA
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
21.6 ~ 26.4V
NORMAL VOLTAGE
24V
INPUT CURRENT Full load
36mA
INPUT CURRENT No load
9mA
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. 1.All parameters are specified at normal input, rated load, 25℃ 70% RH ambient.
  2. 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf & 47uf capacitor.
  3. 3.Load regulation is measured from 10% to 100% rated load.
  4. 4.Please prevent the converter from operating in overload or short circuit condition for more than 30 seconds.

Technical drawings

SRS-2405 Mechanical Specification
Mechanical Specification
SRS-2405 Packing
Packing

Downloads

FAQ

Can I use the SRS-2405 to generate 5V logic power from a 24VAC control circuit?

Yes, this model is intended for applications that need a constant 5V output from a 21-26VAC input range. It is best matched to low-power logic or control electronics within its 0.5W output rating.

Is the SRS-2405 a fit for powering a small embedded controller section from 24VAC?

It can fit a small embedded controller section if that section only needs a very light 5V rail and the source is 21-26VAC. The output is fixed at 5V and the total converter power is 0.5W, so it is intended for low-demand electronics rather than broad system loads.

Can the SRS-2405 be used in an automation panel for a 5V interface circuit?

It is suitable for a 5V interface or auxiliary logic circuit in an automation panel when the available input is 21-26VAC. Its 22.6 x 9.9 x 8.4 mm package also helps where space is tight in compact control hardware.

Would this converter make sense for a low-power 5V monitoring or sensor-support circuit?

Yes, it can be used for a low-power 5V monitoring or support circuit fed from 21-26VAC. Because the unit is rated at 0.5W and uses constant-voltage output, it is best for light electronics rather than larger sensor groups or higher-load devices.

Can the SRS-2405 be used outdoors or in unprotected locations?

The operating temperature range is -25C to +71C, which defines the thermal limits. However, no IP rating is listed, so there is no stated ingress-protection basis for exposed outdoor placement, making protected indoor enclosures the safer use case.

Payment & Security

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Mean Well SRS-2405 DC-DC Converter - 0.5W - 21.6~26.4V in 5V out
Mean Well

Mean Well SRS-2405 DC-DC Converter - 0.5W - 21.6~26.4V in 5V out

Log in to see price

SRS-2405 is the 5V 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
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