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

Name: Mean Well LAD-360B Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, TTL Signal 11.5A
Brand: Mean Well
SKU: LAD-360B
Price: 51.83 USD
Availability: InStock

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

SKU LAD-360B

$51.83 USD

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Select model — 6 in this family

LAD-360B

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-360B is the model of this series: 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-360BSpecifications from the official datasheet (2026-01-23 edition)

OUTPUT

OUTPUT NUMBER: CH1 / CH2
DC VOLTAGE CH1: 27.6V
DC VOLTAGE CH2: 27.6V
RATED CURRENT CH1: 11.5A
RATED CURRENT CH2: 1.5A(Battery Charger)
CURRENT RANGE CH1: 0 ~ 13A
CURRENT RANGE CH2: --------
RATED POWER: 358.8W
RIPPLE & NOISE (max.) CH1^Note.2: 150mVp-p
RIPPLE & NOISE (max.) CH2^Note.2: --------
VOLTAGE ADJ. RANGE: CH1: 21.6 ~ 29V
VOLTAGE TOLERANCE CH1^Note.3: ±1.0%
VOLTAGE TOLERANCE CH2^Note.3: --------
LINE REGULATION CH1: ±0.5%
LINE REGULATION CH2: --------
LOAD REGULATION CH1: ±0.5%
LOAD REGULATION 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: TTL signal, High / Open : AC Fail ; Low : AC OK ; Ice : max. 30mA@ 50VDC
BATTERY DISCONNECT/ REVERSE POLARITY: TTL signal, High / Open : Battery connect/normal ; Low : Battery disconnect/reverse polarity; Ice : max. 30mA@ 50VDC
BATTERY LOW: TTL signal, High / Open : Battery normal ; Low : Battery low; Ice : max. 30mA@ 50VDC
BATTERY FULL: TTL signal, High / Open : Battery charging ; Low : Battery full ; Ice : max. 30mA@ 50VDC
DISCHARGE: TTL signal, High / Open : Charge ; Low : Discharge ; Ice : max. 30mA@ 50VDC

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
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^{Note 4 & 5}: 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^{Note 4 & 5}: 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: 1394.9K hrs min. Telcordia SR-332 (Bellcore); 153.3K 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-360B Suggested Application — Suggested Application

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

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

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

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

Typical applications

Downloads

Datasheet1

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

FAQ

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

The Mean Well LAD-360B is a 360W security and fire alarm power supply with a built-in battery charger and UPS function. It is intended for applications that need 27.6V DC output with backup power support and status monitoring.

What are the main output specifications of the LAD-360B?

This model is rated for 358.8W (360W class) output at 27.6V DC with a rated current of 11.5A. The CH1 output voltage is also adjustable within a range of 21.6V to 29V, which allows output trimming for system requirements.

Does the LAD-360B support battery backup operation?

Yes, the LAD-360B includes a built-in battery charger and UPS function for backup power applications. It also includes a forced start UPS mode for emergency, maintenance or testing, which makes it suitable for systems that need battery-supported continuity.

What status signals are available on the LAD-360B?

This model provides TTL signals for status detection, including AC OK, battery disconnect, battery reverse polarity, battery low, battery full, and discharge. These signals can help support higher-level system monitoring and fault awareness.

What protection features does the LAD-360B include?

The LAD-360B includes protections for overload, over voltage, over temperature, battery cutoff at 21.5V, and battery reverse polarity. The battery reverse polarity protection is specified as no-damage protection, which helps reduce risk if a battery is connected incorrectly.

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

It is rated for operation from -20°C to +60°C (with derating at higher temperatures per the derating curve), which supports use in a wide range of indoor equipment environments. The unit also has a low 30mm height, which can be useful where installation space is limited.

What certifications and standards does the LAD-360B meet?

The LAD-360B is approved to UL62368-1, BS EN/EN62368-1, AS/NZS62368.1, and EAC TP TC 004. Its design also refers to GB 17945-2010 and it meets listed EMC standards including EN55032 Class A and several EN61000 immunity requirements.

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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-360BU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, UART Signal 11.5A	358.8W	27.6V	11.5A	IP20	$62.12	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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