MEAN WELL SRS series: Isolated regulated single-output DC-DC converter - SRS-4812

Description

SRS-4812 — Isolated regulated single-output DC-DC converter

MEAN WELL SRS-4812 is an isolated, regulated single-output DC-DC converter with a 48 V DC nominal input, a 43.2–52.8 V DC input range and 12 V DC output. The catalog rates this model at 0.5 W with a 0–42 mA output-current range. It uses a non-conductive plastic dual-in-line package, internal SMD construction and natural convection cooling.

Download MEAN WELL SRS Datasheet (PDF)

Series section: PDF pages 1–2.

Model and output specifications

Complete model / series SRS-4812 / SRS.
Model selection The input code 48 selects 48 V DC nominal input; the output code 12 selects 12 V DC.
Output voltage 12 V DC, single output.
Output current range 0–42 mA.
Rated output power 0.5 W.
Voltage accuracy ±2.0% typical; ±3.0% maximum.
Line regulation ±1.0%.
Load regulation ±1.0%, measured from 10% to 100% rated load.
Ripple and noise 100 mVp-p maximum. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors.
Switching frequency 50 kHz minimum.

Input and protection

Input voltage 43.2–52.8 V DC; normal input 48 V DC.
Typical efficiency 60% at the stated reference test conditions.
Input current 19 mA at full load; 5 mA at no load.
Input filter Built-in EMI filter; capacitor-type input filter.
Input fuse An input fuse is recommended.
Overload protection 150–350% of rated output power; hiccup mode, with automatic recovery after the fault is removed.
Short-circuit protection The output is protected by hiccup mode, with automatic recovery after the fault is removed.
Fault-duration limit Do not operate the converter in overload or short circuit for more than 30 seconds.

Operating conditions and isolation

Operating temperature and cooling −25 to +71°C, with free-air convection and the specified load derating.
Load derating The curve permits 100% load through +60°C and approximately 80% at +71°C. The operating rating ends at +71°C.
Working humidity 20–90% RH, non-condensing.
Storage conditions −25 to +105°C; 10–95% RH.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration 10–500 Hz, 2G; 10 minutes per cycle, for 60 minutes along each of the X, Y and Z axes.
Reference test conditions Normal input of 48 V DC, rated load, 25°C and 70% RH, unless otherwise specified.
Input-to-output withstand voltage 1.5 kV DC.
Isolation resistance 100 MΩ between input and output, tested at 500 V DC, 25°C and 70% RH.
Isolation capacitance 80 pF maximum.

Mechanical design and selection

Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H).
Pin assignment Bottom view: pins 1 and 16: +Vin; pins 6 and 11: −Vout; pins 7 and 10: +Vout; pins 8 and 9: −Vin.
Mechanical drawing details Dual-in-line package. Pin section 0.50 × 0.30 mm, with ±0.05 mm pin tolerance; other stated x.x/x.xx dimensions have ±0.5 mm tolerance. Lead projection 3.81 mm; pin-row spacing 7.62 mm. Use the complete bottom-view drawing for the PCB footprint.
Package selection This catalog model uses the dual-in-line package shown in the drawing. Confirm any alternative package with the manufacturer before selecting a different configuration.
Unit weight reference 3.1 g, explicitly stated as a catalog packing reference per unit.
Manufacturer packaging reference 22 pieces per tube; tube gross weight 110 g. Up to 3080 pieces in 140 tubes per carton; carton gross weight 16.2 kg. These packaging weights are separate from the per-unit reference.

EMC and manufacturer references

Safety standards EAC TP TC 020/2011 approved.
Catalog markings FCC, EAC, CE and UKCA are shown in the catalog.
EMC emission BS EN/EN55032 Class B, FCC Part 15 Class B and EAC TP TC 020.
EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6 and -8; light-industry level, criterion A; EAC TP TC 020.
Design features Internal SMD technology and a non-conductive plastic case. The manufacturer describes a low-cost, high-reliability design.
Manufacturing test 100% burn-in test.
MTBF reference 600 khrs minimum, MIL-HDBK-217F at 25°C; a reliability reference, not a service-life guarantee.
Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

MEAN WELL SRS series: Isolated regulated single-output DC-DC converter - SRS-4812

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SRS-4812 — Isolated regulated single-output DC-DC converter MEAN WELL SRS-4812 is an isolated, regulated single-output DC-DC converter with a 48... Read more

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    Description

    SRS-4812 — Isolated regulated single-output DC-DC converter

    MEAN WELL SRS-4812 is an isolated, regulated single-output DC-DC converter with a 48 V DC nominal input, a 43.2–52.8 V DC input range and 12 V DC output. The catalog rates this model at 0.5 W with a 0–42 mA output-current range. It uses a non-conductive plastic dual-in-line package, internal SMD construction and natural convection cooling.

    Download MEAN WELL SRS Datasheet (PDF)

    Series section: PDF pages 1–2.

    Model and output specifications

    Complete model / series SRS-4812 / SRS.
    Model selection The input code 48 selects 48 V DC nominal input; the output code 12 selects 12 V DC.
    Output voltage 12 V DC, single output.
    Output current range 0–42 mA.
    Rated output power 0.5 W.
    Voltage accuracy ±2.0% typical; ±3.0% maximum.
    Line regulation ±1.0%.
    Load regulation ±1.0%, measured from 10% to 100% rated load.
    Ripple and noise 100 mVp-p maximum. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors.
    Switching frequency 50 kHz minimum.

    Input and protection

    Input voltage 43.2–52.8 V DC; normal input 48 V DC.
    Typical efficiency 60% at the stated reference test conditions.
    Input current 19 mA at full load; 5 mA at no load.
    Input filter Built-in EMI filter; capacitor-type input filter.
    Input fuse An input fuse is recommended.
    Overload protection 150–350% of rated output power; hiccup mode, with automatic recovery after the fault is removed.
    Short-circuit protection The output is protected by hiccup mode, with automatic recovery after the fault is removed.
    Fault-duration limit Do not operate the converter in overload or short circuit for more than 30 seconds.

    Operating conditions and isolation

    Operating temperature and cooling −25 to +71°C, with free-air convection and the specified load derating.
    Load derating The curve permits 100% load through +60°C and approximately 80% at +71°C. The operating rating ends at +71°C.
    Working humidity 20–90% RH, non-condensing.
    Storage conditions −25 to +105°C; 10–95% RH.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration 10–500 Hz, 2G; 10 minutes per cycle, for 60 minutes along each of the X, Y and Z axes.
    Reference test conditions Normal input of 48 V DC, rated load, 25°C and 70% RH, unless otherwise specified.
    Input-to-output withstand voltage 1.5 kV DC.
    Isolation resistance 100 MΩ between input and output, tested at 500 V DC, 25°C and 70% RH.
    Isolation capacitance 80 pF maximum.

    Mechanical design and selection

    Dimensions 22.6 × 9.9 × 8.9 mm (L × W × H).
    Pin assignment Bottom view: pins 1 and 16: +Vin; pins 6 and 11: −Vout; pins 7 and 10: +Vout; pins 8 and 9: −Vin.
    Mechanical drawing details Dual-in-line package. Pin section 0.50 × 0.30 mm, with ±0.05 mm pin tolerance; other stated x.x/x.xx dimensions have ±0.5 mm tolerance. Lead projection 3.81 mm; pin-row spacing 7.62 mm. Use the complete bottom-view drawing for the PCB footprint.
    Package selection This catalog model uses the dual-in-line package shown in the drawing. Confirm any alternative package with the manufacturer before selecting a different configuration.
    Unit weight reference 3.1 g, explicitly stated as a catalog packing reference per unit.
    Manufacturer packaging reference 22 pieces per tube; tube gross weight 110 g. Up to 3080 pieces in 140 tubes per carton; carton gross weight 16.2 kg. These packaging weights are separate from the per-unit reference.

    EMC and manufacturer references

    Safety standards EAC TP TC 020/2011 approved.
    Catalog markings FCC, EAC, CE and UKCA are shown in the catalog.
    EMC emission BS EN/EN55032 Class B, FCC Part 15 Class B and EAC TP TC 020.
    EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6 and -8; light-industry level, criterion A; EAC TP TC 020.
    Design features Internal SMD technology and a non-conductive plastic case. The manufacturer describes a low-cost, high-reliability design.
    Manufacturing test 100% burn-in test.
    MTBF reference 600 khrs minimum, MIL-HDBK-217F at 25°C; a reliability reference, not a service-life guarantee.
    Manufacturer warranty reference The catalog states a 2-year manufacturer warranty.

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