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Mean Well NPB-120-24TB Battery Charger 120W 24V Terminal Block 4A

Name: Mean Well NPB-120-24TB Battery Charger 120W 24V Terminal Block 4A
Brand: Mean Well
SKU: NPB-120-24TB
Price: 61.8 USD
Availability: InStock

wide voltage rangemetal enclosure for better heat dissipationeasy and flexible adjustment for voltage and current2 or 3 stage selectable by dip switch

SKU NPB-120-24TB

$61.80 USD

Shipping calculated at checkout.

In stock

Overview

NPB-120-24TB is the model of this series: typical efficiency 89%.

NPB-120 series is a 120W charger for compatible with lead-acid (Flooded, Gel, AGM) and li-ion(Lithium iron, lithium manganese) batteries. This product is a classⅠ power unit (with FG), equipped with a standard IEC320-C14 AC inlet and two or three-stage charging control. The entire series supplies different models with output voltages ranging between 10.5VDC and 60.8VDC that can satisfy the demands for various types of batteries devices.

Features

90~264Vac universal AC input, built-in PFC
Charger for compatible with lead-acid and li-ion batteries
Fanless design
Wide adjustable output range by VR:
►Charging voltage adjustable(10.5~15.2V、21~30.4V、42~60.8V)
►Charging current adjustable(50~100% rated current)
2 or 3 stage selectable by DIP S.W
No load power consumption< 0.15W(AC S.W off)
-30℃~+70℃ wide operating temperature
Protections: Short circuit / Over voltage /Over temperature / Battery reverse polarity protection
Comply with UL/EN62368-1 and EN60335-1/2-29 dual certification
Front panel LED indicator for charging status
3 years warranty

Specifications

NPB-120-24TBSpecifications from the official datasheet (2026-07-06 edition)

OUTPUT

BOOST CHARGE VOLTAGE(Vboost)(default): 28.8V
FLOAT CHARGE VOLTAGE(Vfloat)(default): 27.6V
VOLTAGE ADJUSTABLE RANGE: 21 ~ 30.4V
OUTPUT CURRENT(Typ.)^Note.5: 4A
CURRENT ADJUSTABLE RANGE: 50% ~ 100%
MAX. POWER^Note.3: 121.6W
RECOMMENDED BATTERY CAPACITY (AMP HOURS)^Note.4: 15 ~ 50AH
LEAKAGE CURRENT FROM BATTERY (Typ.): <1mA

INPUT

VOLTAGE RANGE^Note.5: 90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.98/115VAC, PF>0.92/230VAC@12V,PF>0.93/230VAC@24/48V at full load
EFFICIENCY (Typ.) XLR: 89%
EFFICIENCY (Typ.) AD1: 89%
EFFICIENCY (Typ.) TB: 89.5%
AC CURRENT (Typ.): 1.5A/115VAC 0.8A/230VAC
INRUSH CURRENT (Typ.): COLD START 55A at 230VAC
LEAKAGE CURRENT: <0.75mA/240VAC

PROTECTION

SHORT CIRCUIT^Note.6: Protection type : Constant current limiting, charger will shutdown after 5 sec, re-power on to recover
OVER VOLTAGE: 32 ~ 40V Protection type : Shut down and latch off o/p voltage, re-power on to recover
REVERSE POLARITY: By internal fuse open
OVER TEMPERATURE: Hiccup mode, recovers automatically after temperature goes down

FUNCTION

CHARGING CURVE: 2 or 3 stage adjustable by DIP S.W

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.05%/℃ (0 ~ 45℃ )
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: CB IEC62368-1,IEC60335-1/2-29, Dekra BS EN/EN62368-1,BS EN/EN60335-1/2-29, UL62368-1, AS/NZS60335-1/2-29, J62368-1 ,EAC TP TC 004, BSMI CNS15598-1 approved
WITHSTAND VOLTAGE: I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
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),BS EN/EN55014-1,CNS15936 Class B
Radiated BS EN/EN55032 (CISPR32),BS EN/EN55014-1,CNS15936 Class B
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55014-2,BS EN/EN55024,BS EN/EN55035,J55032(H29)

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 2, 3V/m
EFT / Burst BS EN/EN61000-4-4 Level 2, 1KV
Surge BS EN/EN61000-4-5 Level 2, 1KV/Line-Line,Level 3, 2KV/Line-Earth
Conducted BS EN/EN61000-4-6 Level 2, 3Vrms
Magnetic Field BS EN/EN61000-4-8 Level 1, 1A/m
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),BS EN/EN55014-1,CNS15936	Class B
Radiated	BS EN/EN55032 (CISPR32),BS EN/EN55014-1,CNS15936	Class B
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 2, 3V/m
EFT / Burst	BS EN/EN61000-4-4	Level 2, 1KV
Surge	BS EN/EN61000-4-5	Level 2, 1KV/Line-Line,Level 3, 2KV/Line-Earth
Conducted	BS EN/EN61000-4-6	Level 2, 3Vrms
Magnetic Field	BS EN/EN61000-4-8	Level 1, 1A/m
Voltage Dips and Interruptions	BS EN/EN61000-4-11	>95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF: 1895.4K hrs min. Telcordia TR/SR-332 (Bellcore) ; 225.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 182.7*96*49mm (L*W*H)
PACKING: 1.3Kg; 10pcs/ 14Kg / 1.13CUFT

Test conditions and notes7

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. Refer to derating curve.
4. This is MEAN WELL's suggested range. Please consult your battery manufacturer for their suggestions about maximum charging current limitation.
5. Derating may be needed under low input voltages. Please check the derating curve for more details.
6. This protection mechanism is specified for the case the short circuit occurs after the charger is turned on.
7. The charger is considered a component which will be installed into a final equipment. 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 )

Technical drawings

NPB-120-24TB Block Diagram — Block Diagram

NPB-120-24TB Block Diagram (2) — Block Diagram (2)

NPB-120-24TB Derating Curve — Derating Curve

NPB-120-24TB Function Manual — Function Manual

NPB-120-24TB Mechanical Specification — Mechanical Specification

NPB-120-24TB Installation Diagram — Installation Diagram

NPB-120-24TB Plug Assignment — Plug Assignment

Typical applications

Radio system backup solution
Electric scooter charger
Camping car、Buses、Heavy duty truck、Specialty vehicles
Surveillance system
Portable power tools

Downloads

Certificates8

Mean Well NPB-120-EMC Certificate PDF Download

Mean Well NPB-120-CE-dec Certificate PDF Download

Mean Well NPB-120-UK-dec Certificate PDF Download

Mean Well NPB-120-240-360-CB(UL) Certificate PDF Download

Mean Well NPB-120-240-360-DEKRA MarK Certificate PDF Download

Mean Well NPB-120-360-CB(UL) Certificate PDF Download

Mean Well NPB-120-240-360-GlobalMark Certificate PDF Download

Mean Well NPB-120-240-360-CB(60335) Certificate PDF Download

Test reports1

Mean Well NPB-120-24 Test Report PDF Download

FAQ

What is the Mean Well NPB-120-24TB designed for?

The NPB-120-24TB is an AC-DC battery charger designed for 24V battery charging applications. It is rated at 120W and delivers 28.8V DC output at up to 4A, making it suitable for professional and industrial charging use cases where a dedicated charger is needed.

What are the main output specifications of the NPB-120-24TB?

This model is rated for 120W output power with a 28.8V DC output and 4A rated current. Those specifications make it a 24V-class battery charger rather than a general low-voltage adapter.

Does the NPB-120-24TB support staged battery charging?

Yes. The product description specifies 2-stage or 3-stage charging capability, which is useful in battery charging applications that require a dedicated charging profile rather than simple fixed-output power delivery. This is one of the key distinctions of the NPB series charger design.

Can the NPB-120-24TB be used in demanding temperature conditions?

This charger is specified for operation from -30°C to 70°C, with load derating at higher temperatures per the derating curve. That wide temperature range makes it a better fit for tougher commercial or industrial environments than chargers limited to standard indoor temperature ranges.

Is this model intended for universal AC input environments?

Yes. The product description lists universal AC input, so the NPB-120-24TB is intended for use across a broad range of AC power systems. That makes it practical for businesses operating across different regions or facility standards.

How heavy is the Mean Well NPB-120-24TB?

The listed product weight is 1.3 kg. That weight reflects a robust industrial charger format rather than a lightweight consumer-style charger.

Payment & Security

Payment methods

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Model	Power	Battery Type	Battery Voltage	Charging Current
Mean Well NPB-120-48XLR Battery Charger 120W 48V 3 Pin Power Pin 2A	120W	Lithium and Lead Acid Battery	57.6V	—	View
Mean Well NPB-120-48TB Battery Charger 120W 48V Terminal Block 2A	120W	Lithium and Lead Acid Battery	57.6V	—	View
Mean Well NPB-120-48AD1 Battery Charger 120W 48V Anderson Connector 2A	120W	Lithium and Lead Acid Battery	57.6V	—	View
Mean Well NPB-120-24XLR Battery Charger 120W 24V 3 Pin Power Pin 4A	120W	Lithium and Lead Acid Battery	28.8V	—	View
Mean Well NPB-120-24AD1 Battery Charger 120W 24V Anderson Connector 4A	120W	Lithium and Lead Acid Battery	28.8V	—	View
Mean Well NPB-120-12XLR Battery Charger 120W 12V with 3 Pin Power Pin 6.8A	120W	Lithium and Lead Acid Battery	14.4V	—	View

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