MEAN WELL SGA12U18-P1J is an SGA12U single-output AC/DC adapter with a two-pin US mains plug and a center-positive P1J DC plug on a fixed cable. The catalogue specifies 18 VDC, 0.666 A and 12 W maximum rated output. Its fully enclosed Class II construction has no protective-earth pin. Apply the output-current, power and temperature limits together.
Product Datasheet
Download MEAN WELL SGA12U Datasheet (PDF)
The SGA12U section is on PDF pages 1, 2, 3. Refer to the complete mechanical drawings and notes when planning installation.
Model and Configuration
| Complete order number |
SGA12U18-P1J. |
| Safety model identifier |
SGA12U18. |
| Product type |
Slim Wall-Mounted AC/DC Power Adapter. |
| Mains plug / electrical class |
Two-pin US plug; Class II, without protective earth. |
| No-load input power |
<0.075 W. |
| Energy-efficiency statement |
Energy efficiency Level VI; EISA 2007 / DoE, as stated in the 2016-07-14 catalogue. |
| Case |
Fully enclosed 94V-0 flame-retardant plastic case. |
| Limited power source |
LPS, as stated in the applicable catalogue. |
The catalogue lists applications in consumer electronics, telecommunications, office facilities and industrial equipment.
The complete order number identifies the US input-plug version and the standard P1J output termination.
Model-Specific DC Output
| Nominal output |
18 VDC. |
| Rated output current |
0.666 A. |
| Current range |
0–0.666 A. |
| Catalogue-rated output power, maximum |
12 W. |
| Ripple and noise, maximum |
80 mVp-p. |
| Voltage tolerance |
±3.0%. |
| Line regulation |
±1.0%. |
| Load regulation |
±3.0%. |
| Efficiency, typical |
85%. |
The current rating and maximum power rating are both limits; observe both when selecting the load. The DC voltage set point is measured at the plug terminals at 50% load.
Input and Timing
| AC input range |
90–264 VAC. |
| Input frequency |
47–63 Hz. |
| AC input current |
0.5 A at 115 VAC; 0.25 A at 230 VAC. |
| Inrush current, maximum |
30 A at 115 VAC; 60 A at 230 VAC. |
| Leakage current, maximum |
0.25 mA at 240 VAC. |
| Set-up / rise / hold-up |
1300 / 50 / 12 ms at 230 VAC and at 115 VAC, full load. |
Protection
| Short circuit / overload |
110–200% of rated output power; hiccup operation with automatic recovery after the fault condition is removed. |
| Overvoltage |
110–140% of rated output voltage; clamping by a Zener diode, output short. |
Cooling and Environmental Limits
| Working ambient |
−20 to +60°C, subject to derating. |
| Temperature/load curve |
100% load from −20°C to 40°C; decrease along the plotted line to 50% load at 60°C. |
| Input/load curve |
100% load across 90–264 VAC in the static-characteristics graph; temperature limits still apply. |
| Working humidity |
20–90% RH, non-condensing. |
| Storage temperature / humidity |
−20 to +85°C; 10–95% RH. |
| Temperature coefficient |
±0.03%/°C over 0–40°C. |
| Vibration |
10–500 Hz, 2 G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis. |
The maximum operating temperature does not permit full output at every ambient temperature. Use the catalogue derating curves when planning the installation.
Safety, Isolation and EMC
| Catalogue safety listing |
UL60950-1 and CSA C22.2 approvals are listed in the 2016-07-14 specification table. |
| Input/output withstand |
4242 VDC. |
| Insulation resistance |
Input/output: 100 MΩ at 500 VDC, 25°C and 70% RH. |
| EMC emission |
FCC Part 15 / CISPR22, Class B, as listed in this catalogue. |
These standards describe the cited catalogue revision. Confirm the applicable approvals and markings for the supplied unit and destination. The final equipment must be evaluated again for compliance with the applicable EMC directives in its intended configuration.
Dimensions and Output Connections
| Dimensions in the specification table |
62.2 × 27.4 × 39.5 mm, L × W × H. |
| Corresponding mechanical drawing |
Length 62.2 mm; width 27.4 mm; the P1J version has a marked height of 45.5 mm. AC pins project beyond the marked housing height; use the full drawing for installation clearance. |
| Output plug |
P1J, tuning-fork type; 2.1 mm inside diameter × 5.5 mm outside diameter × 11 ±0.5 mm insertion length. |
| Polarity |
C+: center/inside positive, outside negative. |
| Fixed output cable |
UL2468, 24 AWG; 1800 mm with +150/−0 mm length tolerance. |
Match the equipment socket to the stated dimensions and center-positive polarity. The cable and P1J termination described here are the configuration of this order number.
Options and Installation
| Alternative plugs and cables |
Other types are available by customer request, as stated in the catalogue. |
| Standard option scope |
P1J is the standard cable termination; USB Type A is a separate standard 5 V configuration. |
Choose the specified output configuration when ordering. Alternative termination details require a defined order specification; they do not change the electrical output limits.
Follow the mechanical drawings and the manufacturer installation instructions for the supplied configuration.
Reliability and Packing
| Catalogue life reference |
3 years at 100% load, 40°C and 8 hours of operation per day. |
| Minimum MTBF |
265 thousand hours, MIL-HDBK-217F at 25°C. |
| Manufacturer warranty |
3 years, as stated in the applicable catalogue. |
| Catalogue single-unit weight |
109 g; explicit per-unit packing reference, not a measured shipping-package weight. |
| Carton packing |
110 pieces / 13 kg / carton. |
Measurement Conditions and Datasheet
| General measurement conditions |
Unless otherwise specified: 115 VAC input, rated load, 25°C and 70% RH. |
| DC voltage measurement |
At the plug terminals and 50% load. |
| Ripple/noise method |
20 MHz bandwidth; a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors. |
| Voltage-tolerance scope |
Includes set-up tolerance, line regulation and load regulation. |
| Line regulation measurement |
From low input line to high input line at rated load. |
| Load regulation measurement |
From 10% to 100% rated load. |
| Applicable catalogue revision |
2016-07-14; combined PDF pages 1, 2, 3. |
