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LAD-120A
Manufacturer MEAN WELL

LAD-120A

Availability: Out of stock
120 W13.8 / 13.8 V8.7 / 1 A90V-264V in

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LAD-120A
Quantity Prices (USD)
Quantity
Unit Price (USD)
1+
$37.48 USD
10+
$35.61 USD
20+
$34.86 USD
50+
$34.11 USD
100+
$33.36 USD
200+
$32.61 USD
All prices are displayed in USD. *Import tariff is included in the listed price. You pay exactly what you see—no surprise fees at checkout. Discounts are applied automatically based on the total quantity added to your cart.
Quick Specs
Input Voltage
90V-264V
Output Voltage
13.8 / 13.8V
Rated Current
8.7 / 1A
Power Rating
120W
Waterproof
Non-waterproof
Dimensions & Weight
6.26 x 3.82 x 1.18 in

Datasheet (PDF)

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The MEAN WELL LAD-120A is a 120W security/fire alarm power supply with a built-in battery charger and UPS function. CH1 supplies the load at 13.8V (up to 7.7A) while CH2 charges an external 12V battery at 13.8V / 1A. When AC mains fails, the unit switches to UPS mode and the battery takes over the load; a battery cutoff at 9.5V ±0.5V protects the battery from deep discharge.

Key features

  • CH1 load output 13.8V, 7.7A rated (0–8.7A); CH2 battery charger 13.8V, 1A
  • Built-in UPS function: automatic switch to battery on AC failure
  • Battery cutoff 9.5V ±0.5V; battery reverse polarity protection (an external fuse in series with the battery is required)
  • Signal outputs: AC OK, battery low, battery full, battery disconnect/reverse polarity, discharge (TTL)
  • Input: 90–264VAC / 127–370VDC
  • Protections: overload, over voltage, over temperature
  • Typical efficiency 86%

Specifications

Output Voltage Rated current Current range Ripple & noise (max.)
CH1 (load) 13.8V 7.7A 0–8.7A 120mVp-p
CH2 (battery charger) 13.8V 1A — —
Model LAD-120A
Series LAD-120
Total rated power 120W
CH1 voltage adjustment 10.8–14.5V
Battery cutoff 9.5V ±0.5V
Input 90–264VAC / 127–370VDC
Efficiency (typ.) 86%
Working temperature -20 to +60°C (-4 to 140°F) ambient, derating per datasheet curve
Dimensions 159 × 97 × 30 mm (6.26 × 3.82 × 1.18 in) (L × W × H)
Weight 0.42 kg

Typical applications: security and access-control systems, fire alarm panels, emergency and backup-powered equipment.

Datasheet: LAD-120 series specification (PDF).

Similar Models

Same product family and output voltage, with the closest available power ratings.

Environmental Documents
📄 E6) COC-REACH (2026/01/28) 📄 E9) CMRT (2025/04/25) 📄 E14) COC-ROHS 2 (2015/863/EU) (2024/10/04) 📄 REACH Certificate (PDF) (2020/12/03) 📄 ROHS Certificate (PDF) (2020/05/29) 📄 E12) COC-ROHS 2 (2011/65/EU) (2016/10/01)
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