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Mean Well LAD-360BU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, UART Signal 11.5A

Name: Mean Well LAD-360BU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, UART Signal 11.5A
Brand: Mean Well
SKU: LAD-360BU
Price: 62.12 USD
Availability: InStock

built-in battery charger and UPS functionTTL signals for status detectionforced UPS mode for battery maintenance1U low profile

SKU LAD-360BU

$62.12 USD

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LAD-360BU

LAD-120B Fixed output Backorder $38.73 USD

LAD-240B Fixed output Backorder $45.98 USD

LAD-360B Fixed output Backorder $51.83 USD

LAD-360BU UART 27.6V Backorder $62.12 USD

LAD-600B Fixed output Backorder $85.20 USD

LAD-600BU UART 27.6V Backorder $91.35 USD

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Overview

LAD-360BU is the CH1: 27.6V / CH2: 27.6V output model of this series: rated current CH1: 11.5A / CH2: 1.5A(Battery Charger), rated power 358.8W, typical efficiency 86%.

LAD-360 series is a 360W economical AC/DC low profile security power supply with UPS function. Adopting the input range from 90Vac to 264Vac (115Vac/230Vac selectable by switch) and supports output 27.6V, 41.5V and 55.2Vdc. With high efficiency up to 86.5% and built-in AC, battery switch for easy maintenance. In addition, LAD-360 series not only provide TTL signals for AC OK, battery disconnect, battery reverse polarity (No damage), battery low detection, battery full and discharge, but also possess UART version so the users can monitor and control the status of the units, that enhance easy way for integration into security and fire systems directly.

Features

Built-in battery charger and UPS function
TTL signals for status detection: AC OK, Battery disconnect, Battery reverse polarity, Battery low, Battery full and Discharge (Blank version only)
UART Communication (U version only)
Built-in buzzer alarm (U version only)
Built-in AC and battery circuit ON/OFF switches enhance safetyness during maintenance
Forced UPS mode for battery maintenance
Protections: Short circuit / Overload / Over voltage / Over temperature / Battery low voltage / Battery reverse polarity (No damage)
-20 ~ +60℃ wide operating temperature
Output voltage adjustable (-20%~+5%) for CH1 by VR
Suitable for lead acid and lithium-ion batteries
Design refer to GB17945/GB4717(U version only) system requirement
1U low profile (30 mm)
3 years warranty

Specifications

LAD-360BUSpecifications from the official datasheet (2026-01-23 edition)

OUTPUT

OUTPUT NUMBER: CH1 / CH2
DC VOLTAGE: CH1: 27.6V / CH2: 27.6V
RATED CURRENT: CH1: 11.5A / CH2: 1.5A(Battery Charger)
CURRENT RANGE: CH1: 0 ~ 13A / CH2: --------
RATED POWER: 358.8W
RIPPLE & NOISE (max.)^Note.2: CH1: 150mVp-p / CH2: --------
VOLTAGE ADJ. RANGE: CH1: 21.6 ~ 29V
VOLTAGE TOLERANCE^Note.3: CH1: ±1.0% / CH2: --------
LINE REGULATION: CH1: ±0.5% / CH2: --------
LOAD REGULATION: CH1: ±0.5% / CH2: --------
SETUP, RISE TIME: 2000ms, 50ms/230VAC 2000ms, 50ms/115VAC at full load
HOLD UP TIME (Typ.): 16ms/230VAC 12ms/115VAC at full load
BATTERY STATIC DISCHARGE CURRENT: <100μA

INPUT

VOLTAGE RANGE: 90 ~ 132VAC / 180 ~ 264VAC by switch 240 ~ 370VDC (Default switch at 230VAC)
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 86%
AC CURRENT (Typ.): 8A/115VAC 4A/230VAC
INRUSH CURRENT (Typ.): COLD START 60A/115VAC 60A/230VAC
LEAKAGE CURRENT: <0.5mA / 240VAC

PROTECTION

OVERLOAD: CH1:105 ~ 135% CH2:90 ~ 110% Protection type : CH1 OLP, CH2 with battery: The unit will enter to UPS mode when CH1 is around 105%~120%, when total output of CH1 + CH2 reach around 125%~135% output shuts down CH1 OLP, CH2 without battery:Shut down o/p voltage,re-power on to removed CH2 : Constant current limiting; fault condition does not affect CH1 working,recovers automatically after fault condition is removed (External fuse is mandatory in series connection with battery for protection)
OVER VOLTAGE: CH1:31 ~ 36V Protection type : Shut down o/p voltage, re-power on to removed
OVER TEMPERATURE: Protection type : Shut down o/p voltage, re-power on to removed
BATTERY REVERSE POLARITY: Protected when reverse polarity , no damage, recovers automatically after fault condition is removed
BATTERY CUTOFF: 21.5V±0.5V

FUNCTION

AC OK: 115VAC Input : Signals AC failure and activates when input voltage <75VAC Recover the main power supply when input voltage >85VAC 230VAC Input : Signals AC failure and activates when input voltage <165VAC Recover the main power supply when input voltage >175VAC
CHARGER CIRCUIT FAIL: Battery disconnected, battery reverse polarity , signal failure
BUZZER ALARM: Battery low( fire alarm system selectable by UART) AC fail, Battery low, battery disconnected, battery reverse connect, overload status (evacuation system selectable by UART)

ENVIRONMENT

WORKING TEMP.: -20 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -30 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: UL62368-1, BS EN/EN62368-1, AS/NZS62368.1, EAC TP TC 004 approved; Design refer to GB 17945-2010, GB4717
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), EAC TP TC 020 Class A
Radiated BS EN/EN55032 (CISPR32), EAC TP TC 020 Class A
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 6KV 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, 1KV/Line-Line ;2KV/Line-FG ;criteria A
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
Conducted	BS EN/EN55032 (CISPR32), EAC TP TC 020	Class A
Radiated	BS EN/EN55032 (CISPR32), EAC TP TC 020	Class A

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 6KV 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, 1KV/Line-Line ;2KV/Line-FG ;criteria A
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: 1160.5K hrs min. Telcordia SR-332 (Bellcore); 126.5K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 215*115*30mm (L*W*H)
PACKING: 0.75Kg; 15pcs/12.25Kg/0.7CUFT

Test conditions and notes6

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. The power supply 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 360mm*360mm metal plate with 1mm of thickness. Radiation testing requires adding 13*26*30NIZN magnetic loops or buckles to the battery output wire. 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 )
5. This power supply does not meet the harmonic current requirements outlined by BS EN/EN61000-3-2. Please do not use this power supply under the following conditions: a) the end-devices is used within the European Union, and b) the end-devices is connected to public mains supply with 220Vac or greater rated nominal voltage, and c) the power supply is: - installed in end-devices with average or continuous input power greater than 75W, or - belong to part of a lighting system Exception: Power supplies used within the following end-devices do not need to fulfill BS EN/EN61000-3-2 a) professional equipment with a total rated input power greater than 1000W; b) symmetrically controlled heating elements with a rated power less than or equal to 200W
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

LAD-360BU Suggested Application — Suggested Application

LAD-360BU ※ Remote UPS mode — ※ Remote UPS mode

LAD-360BU 2.2 Charging Curve for Different Battery(U version only) — 2.2 Charging Curve for Different Battery(U version only)

LAD-360BU ◎ Charging curve — ◎ Charging curve

LAD-360BU 2.3 Mode Selection for Buzzer(U version only) — 2.3 Mode Selection for Buzzer(U version only)

LAD-360BU 2.4 Battery Inspection — 2.4 Battery Inspection

LAD-360BU 2.5 UART Communication Interface(U version only) — 2.5 UART Communication Interface(U version only)

LAD-360BU L A D - 3 6 0 series — L A D - 3 6 0 series

LAD-360BU L A D - 3 6 0 series (2) — L A D - 3 6 0 series (2)

LAD-360BU L A D - 3 6 0 series (3) — L A D - 3 6 0 series (3)

LAD-360BU L A D - 3 6 0 series (4) — L A D - 3 6 0 series (4)

LAD-360BU Illustration (page 9) — Illustration (page 9)

Typical applications

Downloads

Datasheet1

LAD-360BU datasheetLAD-360-SPEC.PDF · 2026-01-23 edition PDF Download

FAQ

What is the Mean Well LAD-360BU designed for?

The LAD-360BU is a 360W security and fire alarm power supply with a built-in battery charger and UPS function. It is intended for systems that need a regulated 27.6V DC output plus battery-backed operation during AC power loss.

What output does the LAD-360BU provide?

This model provides a 27.6V DC output and is rated for 11.5A, with a total power rating of 360W. The CH1 output voltage is also adjustable within the stated range of 21.6V to 29V.

Does the LAD-360BU support battery backup operation?

Yes. The LAD-360BU includes both a built-in battery charger and UPS function, making it suitable for backup-power applications in security and fire alarm systems. It also includes a forced start UPS mode for emergency, maintenance or testing.

What battery types is the LAD-360BU compatible with?

Mean Well specifies selectable charging curves for both lead acid and lithium-ion batteries on the LAD-360BU. That makes it a flexible option for systems using different battery chemistries, provided the overall system design matches the product's electrical requirements.

What status monitoring signals are available on the LAD-360BU?

The unit reports AC OK, battery disconnect, battery reverse polarity, battery low, battery full, and discharge status through its UART communication interface. These signals help support system-level status detection and monitoring in more advanced security or alarm applications.

What protection features are built into the LAD-360BU?

The LAD-360BU includes protection for overload, over voltage, over temperature, battery reverse polarity, and a battery cutoff at 21.5V±0.5V. Mean Well also states that battery reverse polarity protection is no-damage.

Is the LAD-360BU suitable for demanding operating environments?

It is rated for operation from -20°C to +60°C (refer to the derating curve), which supports use in a wide range of commercial and industrial indoor environments. The unit also meets listed safety and EMC standards, including UL62368-1 and EN55032 Class A.

How compact is the LAD-360BU for panel or enclosure use?

The LAD-360BU uses a low-profile design with a height of 30mm. Its stated dimensions are 215 x 115 x 30mm, which can help when space is limited in compact security or fire system enclosures.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well LAD-600B Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 27.6V, TTL Signal 18.74A	600.02W	27.6V	18.74A	IP20	$85.20	View
Mean Well LAD-600DU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 55.2V, UART Signal 7.87A	600.02W	55.2V	7.87A	IP20	$91.35	View
Mean Well LAD-600D Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 55.2V, TTL Signal 7.87A	600.02W	55.2V	7.87A	IP20	$85.20	View
Mean Well LAD-600CU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 41.5V, UART Signal 11.45A	599.67W	41.5V	11.45A	IP20	$91.35	View
Mean Well LAD-600C Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 41.5V, TTL Signal 11.45A	599.67W	41.5V	11.45A	IP20	$85.20	View
Mean Well LAD-600BU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 27.6V, UART Signal 18.74A	600.02W	27.6V	18.74A	IP20	$91.35	View
Mean Well LAD-360DU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 55.2V, UART Signal 5.03A	360.46W	55.2V	5.03A	IP20	$62.12	View
Mean Well LAD-360D Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 55.2V, TTL Signal 5.03A	360.46W	55.2V	5.03A	IP20	$51.83	View
Mean Well LAD-360CU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 41.5V, UART Signal 7.14A	358.56W	41.5V	7.14A	IP20	$62.12	View
Mean Well LAD-360C Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 41.5V, TTL Signal 7.14A	358.56W	41.5V	7.14A	IP20	$51.83	View
Mean Well LAD-360B Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, TTL Signal 11.5A	358.8W	27.6V	11.5A	IP20	$51.83	View
Mean Well LAD-240D Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 55.2V 3.4A	242.88W	55.2V	3.4A	IP20	$47.98	View
Mean Well LAD-240C Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 41.5V 4.78A	239.87W	41.5V	4.78A	IP20	$46.98	View
Mean Well LAD-240B Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 27.6V 7.7A	240.12W	27.6V	7.7A	IP20	$45.98	View
Mean Well LAD-240A Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 13.8V 16.4A	240.12W	13.8V	16.4A	IP20	$44.98	View
Mean Well LAD-120D Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 55.2V 1.21A	121.99W	55.2V	1.21A	IP20	$38.73	View
Mean Well LAD-120C Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 41.5V 1.9A	120.35W	41.5V	1.9A	IP20	$38.73	View
Mean Well LAD-120B Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 27.6V 3.4A	121.4W	27.6V	3.4A	IP20	$38.73	View
Mean Well LAD-120A Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 13.8V 7.7A	120W	13.8V	7.7A	IP20	$38.73	View

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