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Mean Well DBU-3200-48 Programmable Charger 3200W 48V 55A

Name: Mean Well DBU-3200-48 Programmable Charger 3200W 48V 55A
Brand: Mean Well
SKU: DBU-3200-48
Price: 668.72 USD
Availability: InStock

suitable for lead-acid and Li-ion batteriesbuilt-in default 3 stage charging curvebuilt-in I²C interfacePMBus protocolactive current sharing up to 6400W

SKU DBU-3200-48

$668.72 USD

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Overview

DBU-3200-48 is the model of this series: typical efficiency 94.5%.

DBU-3200 is a 3200W single output AC/DC enclosed charger in 1U low profile with high power density, 37W/inch3. It is an intelligent charger that has pre-loaded programmable charging curves for different types of lead-acid and li-ion batteries. Output programmable function allows user to adjust the charging voltage and current via the built-in potentiometer or PMBus protocol. Various protection mechanisms as well as the temperature compensation function are provided to assure normal and safe system operation.

Features

Charger for lead-acid batteries (Gel, flooded and AGM) and Li-ion batteries (lithium iron and lithium manganese)
Built-in default 3 stage charging curves and programmable curve
Built-in I2C interface, PMBus protocol (Optional CANBus protocol)
Universal AC input / Full range
Built-in active PFC function
Forced air cooling by built-in thermal controlled DC fans
Output voltage and current programmable
Built-in OR-ing FET
Active current sharing up to 6400W(1+1)
Protections: Battery under voltage / Battery no connection / Short circuit / Over voltage / Over temperature
Optional conformal coating
5 years warranty

Specifications

DBU-3200-48Specifications from the official datasheet (2025-10-23 edition)

OUTPUT

BOOST CHARGE VOLTAGE(Vboost)(default): 57.6V
FLOAT CHARGE VOLTAGE(Vfloat)(default): 55.2V
CONSTANT CURRENT(CC)(default): 55A
VOLTAGE ADJ. RANGE: By built-in potentiometer, SVR
VOLTAGE ADJ. RANGE: 47.5 ~ 58.8V
RECOMMENDED BATTERY CAPACITY(AMP HOURS)^Note.3: 180 ~ 550Ah
LEAKAGE CURRENT FROM BATTERY (Typ.): 1.5mA

INPUT

VOLTAGE RANGE^Note.4: 90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): 0.97/230VAC at full load
EFFICIENCY (Typ.): 94.5%
AC CURRENT (Typ.)^Note.4: 17A/230VAC
INRUSH CURRENT (Typ.): COLD START 55A/230VAC
LEAKAGE CURRENT: <2mA / 230VAC

PROTECTION

OVER VOLTAGE: 63 ~ 75V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

OUTPUT VOLTAGE PROGRAMMABLE(PV): Adjustment of output voltage is allowable to 75 ~ 125% of nominal output voltage. Please refer to the Function Manual.
OUTPUT CURRENT PROGRAMMABLE(PC): Adjustment of output voltage is allowable to 20 ~ 100% of rated current. Please refer to the Function Manual.
AUXILIARY POWER: 5V @ 0.3A, tolerance ±10%, ripple 150mVp-p, 12V @ 0.8A, tolerance ±10%, ripple 450mVp-p
REMOTE ON-OFF CONTROL: By electrical signal or dry contact Power ON:short Power OFF:open. Please refer to the Function Manual
TEMPERATURE COMPENSATION: -3mV / ℃ / cell / (12V = 6 cells ; 24V = 12 cells ; 48V = 24 cells)
ALARM SIGNAL: Isolated signal output for T-alarm and DC-OK

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: UL62368-1, CSA C22.2 No. 62368-1, TUV BS EN/EN62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:1.5KVAC
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 (CISPR32) Class B
Radiated BS EN/EN55032 (CISPR32) Class A
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact
Radiated BS EN/EN61000-4-3 Level 3
EFT / Burst BS EN/EN61000-4-4 Level 3
Surge BS EN/EN61000-4-5 2KV/Line-Line 4KV/Line-Earth
Conducted BS EN/EN61000-4-6 Level 3
Magnetic Field BS EN/EN61000-4-8 Level 4
Voltage Dips and Interruptions BS EN/EN61000-4-11 >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted	BS EN/EN55032 (CISPR32)	Class B
Radiated	BS EN/EN55032 (CISPR32)	Class A
Harmonic Current	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact
Radiated	BS EN/EN61000-4-3	Level 3
EFT / Burst	BS EN/EN61000-4-4	Level 3
Surge	BS EN/EN61000-4-5	2KV/Line-Line 4KV/Line-Earth
Conducted	BS EN/EN61000-4-6	Level 3
Magnetic Field	BS EN/EN61000-4-8	Level 4
Voltage Dips and Interruptions	BS EN/EN61000-4-11	>95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF: 494.2K hrs min. Telcordia SR-332 (Bellcore) ; 44.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 325.8*107*41mm (L*W*H)
PACKING: 2.76Kg;4pcs/12Kg/0.83CUFT

Test conditions and notes6

1. Modification for charger specification may be required for different battery specification. Please contact battery vendor and MEAN WELL for details.
2. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
3. This is MEAN WELL's suggested range. Please consult your battery manufacturer for their suggestions about maximum charging current limitation.
4. Derating may be needed under low input voltages. Please check the derating curve for more details.
5. The charger is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 600mm*900mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
6. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

DBU-3200-48 BLOCK DIAGRAM — BLOCK DIAGRAM

DBU-3200-48 DERATING CURVE — DERATING CURVE

DBU-3200-48 FUNCTION MANUAL — FUNCTION MANUAL

DBU-3200-48 CURRENT(%)OUTPUT — CURRENT(%)OUTPUT

DBU-3200-48 CURRENT(%)OUTPUT (2) — CURRENT(%)OUTPUT (2)

DBU-3200-48 ◎ To exploit the temperature compensation function,… — ◎ To exploit the temperature compensation function,…

DBU-3200-48 8. Alarm Signal Output — 8. Alarm Signal Output

DBU-3200-48 D B U - 3 2 0 0 series — D B U - 3 2 0 0 series

DBU-3200-48 (V : CN500 connected ; X : CN500 not connected.) — (V : CN500 connected ; X : CN500 not connected.)

DBU-3200-48 (V : CN500 connected ; X : CN500 not connected.) (2) — (V : CN500 connected ; X : CN500 not connected.) (2)

DBU-3200-48 MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

DBU-3200-48 ※AC Input Terminal Pin No. Assignment — ※AC Input Terminal Pin No. Assignment

Typical applications

Large scale DC UPS or emergency backup system
Marine battery charger module
Electric scooter or vehicle charger station
Wastewater treatment system
Electrolysis system

Downloads

Certificates5

Mean Well DBR-DRP-DBU-DPU-NSP-3200-DHP-1UT-TUV-3nd Certificate PDF Download

Mean Well DBR-DRP-DBU-DPU-NSP-3200-DHP-1UT-CB(UL)-3nd Certificate PDF Download

Mean Well DBR-DRP-DBU-DPU-NSP-3200-DHP-1UT-CB-(UL)-2nd Certificate PDF Download

Mean Well DBR-DBU-DPU-3200-DHB-DHP-12K1UT-DHP-1UT-A-CB(60950) Certificate PDF Download

Mean Well DBR-DBU-DPU-3200-DHB-DHP-12K1UT-DHP-1UT-A-CB(62368) Certificate PDF Download

Test reports1

Test Report (DBU-3200-48)(EN) PDF Download

FAQ

What types of batteries is the Mean Well DBU-3200-48 designed to charge?

The DBU-3200-48 is designed for lead-acid batteries including gel, flooded, and AGM types, as well as Li-ion batteries using lithium iron and lithium manganese chemistries. That makes it suitable for industrial charging applications where battery chemistry may vary across equipment fleets.

What are the main output specifications of the DBU-3200-48?

This model is a 3200W programmable charger with a 48V output and a rated current of 55A. It is intended for higher-power battery charging applications where a 48V system and substantial charging capacity are required.

Can the DBU-3200-48 be used in demanding industrial environments?

Yes. The unit is rated for operation from -30°C to +70°C (with output derating per the derating curve) and is cooled by a built-in fan. It also includes over-voltage, over-temperature and battery-low protection, and signals over-temperature or fan failure through its T-alarm output.

Does this charger support programmable charging control?

Yes. The DBU-3200-48 includes default 3-stage charging curves and also supports a programmable charging curve, with programmable output voltage and current. This is useful for buyers who need to match the charger to specific battery charging requirements rather than relying on one fixed profile.

What communication interface does the DBU-3200-48 provide for system integration?

The charger supports PMBus Rev. 1.1 communication (up to 100KHz) for information reading, status monitoring and output trimming, and the sheet also lists a CANBus model. That makes it a better fit for monitored or managed charging systems than a basic standalone charger with no communication support.

Can the DBU-3200-48 be used in higher-power redundant charging systems?

This model has built-in active current sharing, and up to 2 units can be connected in parallel for higher output power, with total output current limited to 90% of the combined rating (99A for two units). It also has a built-in ORing FET on the output.

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