Technical Information & Details for MEAN WELL ENP-120-12 Power Supply Output Power: 120 W (Peak 150.4 W / 125%) Output Voltage: 13.8 V DC (Adjustable 11.5 – 15 V) Output Current: 8.7 A (Peak 10.9 A) Input Voltage Range: 90 – 264 V AC / 127 – 370 V DC, 47 – 63 Hz Efficiency: 89.5% Ripple & Noise: ≤ 150 mVp-p Inrush Current: Max. 65 A @ 230 VAC (Cold start) No-Load Power Consumption: < 0.15 W Operating Temperature: −30 °C to +70 °C Cooling: Fanless, free air convection Protections: Short circuit, Overload, Over voltage, Over temperature Overvoltage Category: OVC II Isolation Voltage: 3000 V AC input-to-output Dimensions (H x W x D): 45.5 mm x 192 mm x 178 mm Weight: approx. 980 g Safety & EMC Certificates: IEC 62368-1, UL 62368-1, EAC TP TC 004, BS EN/EN 55032 Class B LED Indicator: Power On indicator Manufacturer Warranty: 3 Years Information on the MEAN WELL ENP-120-12 Engineered to match standard 7-inch chassis widths in land mobile radio and communication infrastructure, the desktop-type MEAN WELL ENP-120-12 delivers a reliable 13.8 V DC output at 8.7 A rated current. Outstanding energy savings are built into the design, achieving full Energy Efficiency Level VI compliance with an ultra-low no-load power consumption of under 0.15 W. Operating entirely fanless under free air convection, it handles demanding environments across an extended operating temperature range of -30 °C to +70 °C. The unit easily handles temporary power surges thanks to its 125% peak load capability, and comes fully safety-certified to the IEC/UL 62368-1 standard for commercial and industrial installations.

Technical Information & Details for MEAN WELL AD-155B Power Supply Output Power: 156.5 W (CH1: 27.6 V / 5 A, CH2: 27.1 V / 0.5 A) Output Voltage: CH1: 27.6 V DC (24–29 V adjustable), CH2: 27.1 V DC Output Current: CH1: 0–5.5 A, CH2: 0–0.5 A Input Voltage Range: 88 – 264 V AC / 124 – 370 V DC, 47 – 63 Hz Efficiency: 84% Ripple & Noise: 150 mVp-p Inrush Current: Cold Start 23 A @ 115 VAC / 45 A @ 230 VAC Power Factor (PFC): PF > 0.92 at full load Operating Temperature: −10 °C to +60 °C Cooling: Free air convection (expandable via 21.6 CFM forced air) Protections: Short circuit, Overload, Over voltage, Battery low shutdown, Battery polarity protection Isolation Voltage: 3000 V AC between Input and Output (I/P-O/P) Dimensions (L x W x H): 199 mm x 110 mm x 50 mm Weight: approx. 880 g Safety & EMC Certifications: UL62368-1, TUV BS EN/EN62368-1, AS/NZS 62368.1, EAC TP TC 004, BS EN/EN55032 Class B LED Indicator: Power On Indicator Warranty: 2 Years Information about MEAN WELL AD-155B Unlike conventional single-output power modules that require external charging controllers, the MEAN WELL AD-155B provides a complete DC backup ecosystem in a single chassis. Operating as a hybrid combination power supply and integrated battery charger, it supplies primary power at 27.6 V DC while simultaneously maintaining secondary battery backup lines. The inclusion of active PFC (Power Factor Correction) offers superior line efficiency and lower harmonic distortion compared to legacy power supply units. To protect connected battery banks against damage, the module features built-in battery low shutdown and polarity protection circuitry. Designed for 24 V nominal control panels, security systems, and remote telemetry, this unit optimizes board space while ensuring uninterrupted operations during main grid failures.

Technical Information & Details for MEAN WELL AD-155A Power Supply Output Power: 151.55 W (CH1: 13.8 V / 11.5 A, CH2: 13.3 V / 0.5 A) Output Voltage: CH1: 13.8 V DC (12–14.5 V adjustable), CH2: 13.3 V DC Output Current: CH1: 0–11.5 A, CH2: 0–0.5 A Input Voltage Range: 88 – 264 V AC / 124 – 370 V DC, 47 – 63 Hz Efficiency: 80% Ripple & Noise: 150 mVp-p Inrush Current: Cold Start 23 A @ 115 VAC / 45 A @ 230 VAC Power Factor (PFC): PF > 0.92 at full load Operating Temperature: −10 °C to +60 °C Cooling: Free air convection (expandable via 21.6 CFM forced air) Protections: Short circuit, Overload, Over voltage, Battery low shutdown, Battery polarity protection Isolation Voltage: 3000 V AC between Input and Output (I/P-O/P) Dimensions (L x W x H): 199 mm x 110 mm x 50 mm Weight: approx. 880 g Safety & EMC Certifications: UL62368-1, TUV BS EN/EN62368-1, AS/NZS 62368.1, EAC TP TC 004, BS EN/EN55032 Class B LED Indicator: Power On Indicator Warranty: 2 Years Information about MEAN WELL AD-155A Engineered to deliver seamless backup capability, the MEAN WELL AD-155A functions as a highly practical dual-purpose power supply and battery charger (UPS function) designed for mission-critical electronic setups. Built-in Power Factor Correction (PFC > 0.92) guarantees optimal energy utilization while lowering line harmonics across standard AC inputs. The unit incorporates dedicated battery polarity and low-battery protection circuits to safeguard external energy storage from deep discharge damage during outages. Operating smoothly under working ambient conditions up to +60 °C, this compact enclosed chassis is an excellent match for security systems, emergency lighting, telecommunications, and industrial automation hardware requiring continuous power retention.

Technical Information & Details for MEAN WELL AD-55B Power Supply Output Power: 51.38 W Output Voltage: CH1: 27.6 V DC, CH2: 26.5 V DC Output Current: CH1: 0–1.8 A, CH2: 0–0.16 A Input Voltage Range: 88 – 264 V AC / 124 – 370 V DC, 47 – 63 Hz Efficiency: 71% Ripple & Noise: ≤ 100 mVp-p Inrush Current: max. 20 A @ 115 V AC / 40 A @ 230 V AC (Cold start) No-load Power Consumption: Not specified Operating Temperature: −10 °C to +60 °C Cooling: Free air convection (fanless) Protections: Short circuit, Overload, Over voltage, Battery low protection Overvoltage Category: Not specified Isolation Voltage: 3000 V AC between Input and Output Dimensions (L x W x H): 159 mm x 97 mm x 38 mm Weight: approx. 500 g Safety & EMC Certificates: UL62368-1, TUV BS EN/EN62368-1, EAC TP TC 004, CE LED Indicator: None Manufacturer Warranty: 2 years Information on MEAN WELL AD-55B Tailored for nominal 24V applications, the MEAN WELL AD-55B functions as a dual-channel power solution equipped with UPS battery charging capability to prevent operational downtime during grid power loss. It delivers a 27.6 V main channel for system equipment alongside a dedicated 26.5 V backup battery output featuring integrated battery low protection to safeguard cells from deep discharge. High operational reliability is supported by a 3000 V AC isolation rating and compliance with international standards such as UL62368-1 and TUV EN62368-1, making it an ideal choice for emergency power, security networks, and DC backup panels.

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