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Mean Well DUPS40 DIN Series Uninterruptible DC-UPS Module 40A

Name: Mean Well DUPS40 DIN Series Uninterruptible DC-UPS Module 40A
Brand: Mean Well
SKU: DUPS40
Price: 45.77 USD
Availability: InStock

uninterruptible DC-UPS controllerslim size40mm widthsuitable for 24V system

SKU DUPS40

$45.77 USD

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Select model — 2 in this family

DUPS40

DUPS20 20A In stock$41.07 USD

DUPS40 40A In stock$45.77 USD

Product variants

In stock

Overview

DUPS40 is the model of this series: rated current 40A.

The DUPS40 is a 40A DIN rail type DC-UPS module, and it is paired with a power supply and an external battery to achieve the backup function. When the AC mains fails or is interrupted, the load will be immediately connected to the battery pack to avoid interruption and to ensure the continuous operation of the entire system (the operating time depends on the capacity of the battery pack). The main features of DUPS40 include: fast installation, suitability for 24V battery packs and various capacities of 4AH~135AH, 2A battery charging current, low voltage disconnect for battery protection and more. The product is suitable for use in data centers, security systems, emergency lighting, wireless communication UPS, central monitoring systems, etc.

Features

Uninterruptible DC-UPS controller
Parallel connection to DC BUS (Power supply + DC-UPS Module + Batteries + Load)
Suitable for 24V system, up to 40A
2A Battery charging current
Allows 4AH~135AH lead-acid various battery capacities
Complete diagnostic and monitoring for DC BUS OK, battery discharge, battery fail
LED indicator for signal status
Protections: Battery reverse polarity protection & Short circuit(By internal detection) / Battery discharge / Over discharge current
Cooling by free air convection
3 years warranty

Specifications

DUPS40Specifications from the official datasheet (2026-06-15 edition)

DC UPS INPUT

NORMAL INPUT VOLTAGE: 24Vdc
INPUT VOLTAGE RANGE: 24 ~ 29Vdc
RATED CURRENT: 40A

DC UPS OUTPUT

VOLTAGE RANGE: 21 ~ 29Vdc
DISCHARGE CURRENT RANGE: 0 ~ 40A
CHARGING CURRENT: 2A

BATTERY

NORMAL BATTERY VOLTAGE: 24Vdc ( 2 x 12Vdc in series or 1 x 24Vdc)
BATTERY TYPE: Lead-acid battery
EXTERNAL BATTERY CAPACITIES: 4AH ~ 135AH

PROTECTION

BATTERY POLARITY: Protected by internal detection, No Damage, recovers automatically after fault conduction is removed
SHORT CIRCUIT: This protection only works when batteries are not connected, No Damage. External fuse is recommended when batteries are connected.
OVER DISCHARGE CURRENT: 42~46A,After 3 sec., unit will cut-off battery discharging by relay
BATTERY DEEP DISCHARGE: Cut-off battery discharging by relay when the battery < 21V

FUNCTION

RELAY CONTACT RATINGS (max.): 30VDC/1A resistive load
DC BUS OK: Relay contact : Short when DC voltage between 21~29V(±2%), relay contacts LED(Green) : DC BUS OK : light ; DC BUS fail : dark
BATTERY FAIL^Note.2: Short when battery voltage falls below 22V(±2%) or battery failure is observed through the battery test function, relay contacts LED(Red) : Battery over-discharge warning or battery broken : light ; Battery OK : dark
BATTERY DISCHARGE: Relay contact : Short when battery in discharge condition, relay contacts LED(Yellow) : light : Battery discharging ; dark : Battery is not discharging or discharging current < 2.0A

ENVIRONMENT

COOLING: Free air convection
WORKING TEMP.^Note.3: -30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 5 ~ 95% RH non-condensing
STORAGE TEMP.: -40 ~ +85℃
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 60℃)
VIBRATION: Component:10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC60068-2-6
OPERATING ALTITUDE^Note.4: 2000 meters/OVC II

SAFETY & EMC (Note.5)

SAFETY STANDARDS: EAC TP TC 004 approved
WITHSTAND VOLTAGE: IP/OP - Chassis : 0.5KVac ; IP/OP- Relay : 0.5KVac ; Relay - Chassis : 0.5KVac
ISOLATION RESISTANCE: IP/OP - Chassis, IP/OP- Relay, Relay - Chassis:>100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Radiated BS EN/EN55032(CISPR32) Class B
EMC IMMUNITY: BS EN/EN55035, BS EN/EN61000-6-2, BS EN/EN61204-3

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact; criteria B Level 2, 4KV air; Level 1, 2KV contact; criteria A
Radiated BS EN/EN61000-4-3 Level 3, 10V/m; criteria A
EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV; criteria A
Surge BS EN/EN61000-4-5 Level 3, 0.5KV(DC input ports)
Conducted BS EN/EN61000-4-6 Level 3, 10V; criteria A
Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m; criteria A

Parameter	Standard	Test Level
Radiated	BS EN/EN55032(CISPR32)	Class B

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact; criteria B Level 2, 4KV air; Level 1, 2KV contact; criteria A
Radiated	BS EN/EN61000-4-3	Level 3, 10V/m; criteria A
EFT / Burst	BS EN/EN61000-4-4	Level 3, 2KV; criteria A
Surge	BS EN/EN61000-4-5	Level 3, 0.5KV(DC input ports)
Conducted	BS EN/EN61000-4-6	Level 3, 10V; criteria A
Magnetic Field	BS EN/EN61000-4-8	Level 4, 30A/m; criteria A

OTHERS

MTBF: 1376.5K hrs min. Telcordia SR-332 (Bellcore) ; 499.5K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 63*125.2*113.5mm (W*H*D)
PACKING: 0.42Kg; 20pcs/9.4Kg/1.57CUFT

Test conditions and notes5

1. All parameters NOT specially mentioned are measured at normal input(24V) , rated load and 25℃ of ambient temperature.
2. Every 30 seconds, unit will test the battery.If the testing result is faulty, unit will turn on "Battery Fail" relay contact and "Red LED" indicator.
3. Derating may be needed over high ambient temperature. Please check the derating curve for more details.
4. 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).
5.The unit 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 360*720mm 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 )

Technical drawings

DUPS40 Mechanical Specification — Mechanical Specification

DUPS40 Installation Instruction — Installation Instruction

DUPS40 Suggested Application — Suggested Application

Typical applications

Industrial control system
Semiconductor fabrication equipment
Factory automation
Electro-mechanical apparatus

Downloads

Datasheet1

DUPS40 datasheetDUPS40-SPEC.PDF · 2026-06-15 edition PDF Download

Certificates4

Mean Well DUPS40 EMC Certificate PDF Download

Mean Well DUPS40 CE-dec Certificate PDF Download

Mean Well DUPS40 UK-dec Certificate PDF Download

Mean Well DUPS20-40 EAC Certificate PDF Download

Test reports1

Mean Well DUPS40 Test Report PDF Download

FAQ

What is the Mean Well DUPS40 used for?

The Mean Well DUPS40 is a DIN rail DC-UPS module designed to maintain continuous DC power during an AC mains failure or interruption. It is intended for systems where downtime is a problem, including data centers, security systems, emergency lighting, wireless communication UPS applications, and central monitoring systems.

What backup battery range is the DUPS40 designed for?

This model is designed for 24V lead-acid battery packs (2 x 12V in series or 1 x 24V) with capacities from 4Ah to 135Ah. That range gives buyers flexibility to size backup duration based on the needs of the connected system.

What are the main electrical ratings of the DUPS40?

The DUPS40 is rated for 40A, with a 24 ~ 29Vdc input range and a 21 ~ 29Vdc output voltage range. It also includes a 2A battery charging current, making it suitable for DC backup power applications built around 24V battery systems.

How does the DUPS40 help protect system uptime?

When the AC mains fails or is interrupted, the DUPS40 supplies the load from the external 24V battery pack. This supports continued operation of critical equipment, with buffering time depending on the load current and the external battery capacity used.

Is the DUPS40 suitable for demanding industrial environments?

The DUPS40 has an operating temperature range of -30°C to 70°C (derating applies at higher ambient temperatures, see the derating curve) and is cooled by free air convection. Its DIN rail form factor also makes it practical for control cabinets and panel-based systems where space and serviceability matter.

Does the DUPS40 include battery protection features?

Yes, the DUPS40 cuts off battery discharging by relay when the battery falls below 21V, and also provides battery reverse-polarity protection and over-discharge-current cut-off (42~46A after 3 seconds). This helps protect the connected battery pack from excessive discharge during backup operation.

Payment & Security

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