MEAN WELL GEM12I05-USB is a GEM12I medical AC/DC adapter providing 5 VDC at 2.4 A, with a catalogue maximum rated power of 12 W. This version has a built-in USB Type-A output socket. Its Class II design uses an interchangeable AC plug sold separately. Apply the model-specific load, temperature and medical-integration conditions below.
Product Datasheet
Download MEAN WELL GEM12I Datasheet (PDF)
The GEM12I section is on PDF pages 6, 7, 8, 9, 10. Refer to the complete mechanical drawings and notes when planning installation.
Model and Configuration
| Complete order number |
GEM12I05-USB. |
| Safety model number |
GEM12I05. |
| Product type |
Interchangeable-Plug Medical AC/DC Adapter; wall-mounted, single DC output. |
| Input construction |
Class II, without a protective-earth pin; interchangeable AC plug ordered separately. |
| Output connection |
Built-in USB Type-A socket, 5 V model. |
| Housing |
Fully enclosed 94V-0 flame-retardant plastic case; IP21 marking in the applicable catalogue. |
| No-load consumption |
<0.075 W. |
| Energy-efficiency statement |
Level VI; EISA 2007 / DoE and EU ErP statements in the 2020-10-30 catalogue. |
| Catalogue warranty |
3 years. |
Intended applications include blood-glucose and blood-pressure meters, nebulizers, inhalers, portable medical equipment and sleep-apnea devices. Apply the model-specific medical and operating conditions below.
Model-Specific DC Output
| Nominal output |
5 VDC. |
| Rated output current |
2.4 A. |
| Current range |
0–2.4 A. |
| Catalogue-rated output power, maximum |
12 W. |
| Ripple and noise, maximum |
60 mVp-p. |
| Voltage tolerance |
±5.0%. |
| Line regulation |
±1.0%. |
| Load regulation |
±5.0%. |
| Efficiency, typical |
80%. |
Observe the stated voltage, current and power ratings together. Output-voltage tolerance includes set-up tolerance, line regulation and load regulation.
Input and Timing
| Voltage range |
80–264 VAC or 113–370 VDC. |
| AC frequency |
47–63 Hz. |
| AC input current |
0.4 A at 115 VAC; 0.2 A at 230 VAC. |
| Cold-start inrush, maximum |
30 A at 115 VAC; 60 A at 230 VAC. |
| Touch current |
<100 µA at 264 VAC. |
| Set-up / rise / hold-up time |
500 / 30 / 16 ms. At 115 VAC and 230 VAC, full load. |
Protection
| Short circuit and overload |
110–200% rated output power; hiccup mode with automatic recovery after the fault condition is removed. |
| Overvoltage |
110–140% of rated output voltage; Zener-diode clamp with output shorting. |
Temperature, Input Derating and Environment
| Working temperature |
−20 to +70°C, subject to derating. |
| Ambient-temperature curve |
100% load from −20 to +40°C; the chart marks 70% at +50°C and 50% at +70°C. |
| Input-voltage curve |
80% load at 80 VAC, increasing to 100% at 115 VAC; 100% from 115 to 264 VAC. |
| Working humidity |
20–90% RH, non-condensing. |
| Storage temperature and humidity |
−20 to +85°C; 10–95% RH, non-condensing. |
| Temperature coefficient |
±0.03%/°C over 0–40°C. |
| Vibration |
10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z axes. |
Apply the ambient-temperature and low-input-voltage load restrictions together; the upper operating temperature does not represent unrestricted full-load operation.
Medical Insulation and Safety
| Primary-to-secondary isolation |
2 × MOPP. |
| Electric-shock protection |
Class II power unit without a protective-earth pin. |
| Dielectric withstand |
Input to output: 5656 VDC. |
| Insulation resistance |
Input to output: 100 MΩ at 500 VDC, 25°C and 70% RH. |
| Catalogue-listed safety standards |
TUV EN60601-1; ANSI/AAMI ES60601-1 (3.1 version); CAN/CSA-C22.2 No. 60601-1, 3rd edition; EAC TP TC 004. |
| Home-healthcare standard scope |
GEM12I05-USB is explicitly excluded from EN60601-1-11 and ANSI/AAMI ES60601-1-11 in the catalogue. |
The catalogue identifies the adapter for BF applications. This is a power-supply selection characteristic; medical-device safety, applied-part classification and EMC compliance must be established for the complete equipment. The standards above describe this 2020-10-30 catalogue version.
Electromagnetic Compatibility
| Conducted and radiated emissions |
EN55011 (CISPR11), FCC Part 15 / CISPR22, Class B. |
| Harmonic current |
EN61000-3-2, Class A. |
| Voltage flicker |
EN61000-3-3. |
| Immunity framework |
EN60601-1-2 and EN61204-3. |
| ESD |
EN61000-4-2: Level 4, 15 kV air; Level 4, 8 kV contact. |
| Radiated RF |
EN61000-4-3: Level 3, 10 V/m at 80 MHz–2.7 GHz; Table 9, 9–28 V/m at 385 MHz–5.78 GHz. |
| EFT bursts |
EN61000-4-4: Level 3, 2 kV. |
| Surge |
EN61000-4-5: Level 3, 1 kV line-to-line. |
| Conducted RF |
EN61000-4-6: Level 2, 3 V. |
| Magnetic field |
EN61000-4-8: Level 4, 30 A/m. |
| Dips and interruptions |
EN61000-4-11: >95% dip for 0.5 periods; 30% dip for 25 periods; >95% interruption for 250 periods. |
The final equipment must be checked again for whole-system EMC compliance, as required by the catalogue integration note.
Mechanical Details and Output Connection
| Dimensions, L × W × H |
73.9 × 39 × 48.5 mm; refer to the selected AC-plug outline in the corresponding mechanical drawing. |
| Single-unit catalogue mass |
78.5 g, the explicit per-unit PACKING reference for USB connection. |
| Weight basis |
Catalogue packing reference per unit; not a measured net weight or the total shipping-carton weight. |
| USB Type-A assignment |
Using the numbering shown in the catalogue mechanical drawing: pin 1 = +V, pin 2 = D−, pin 3 = D+, pin 4 = −V. |
The USB drawing identifies the contacts; it does not specify a data service or charging-negotiation protocol. The cable-termination options below describe alternative factory cable configurations, not included adapters for this USB socket.
Interchangeable AC Plugs
| AC PLUG-AU2 |
Australian. |
| AC PLUG-UK2 |
UK. |
| AC PLUG-EU2 |
European. |
| AC PLUG-US2 |
US. |
| AC PLUG-MIX2 |
All four types. |
Order the selected AC plug separately. AC PLUG-MIX2 contains the Australian, UK, European and US types. The catalogue identifies these “2” plug parts for GEM06I, GEM12I, GEM18I, GEM30I, GEM40I and GEM60I. Select the part for the actual adapter and regional outlet; the Class II adapter has no earth pin.
Optional DC Terminations and Quick Adapters
| Tuning fork options, OD / ID / length (mm) |
P1I: 5.5 / 2.1 / 9.5; P1L: 5.5 / 2.5 / 9.5; P1M: 5.5 / 2.5 / 11; P1IR: 5.5 / 2.1 / 9.5; P1JR: 5.5 / 2.1 / 11; P1LR: 5.5 / 2.5 / 9.5; P1MR: 5.5 / 2.5 / 11. Quick-adapter versions are listed, 7.5 A maximum. |
| Barrel options, OD / ID / length (mm) |
P2I: 5.5 / 2.1 / 9.5; P2J: 5.5 / 2.1 / 11; P2L: 5.5 / 2.5 / 9.5; P2M: 5.5 / 2.5 / 11; P2IR: 5.5 / 2.1 / 9.5; P2JR: 5.5 / 2.1 / 11; P2LR: 5.5 / 2.5 / 9.5; P2MR: 5.5 / 2.5 / 11. No quick-adapter accessory is listed for this style. |
| Floating lock options, OD / ID / length (mm) |
P2S (S761K): 5.53 / 2.03 / 12.06; P2K (761K): 5.53 / 2.54 / 12.06; P2C (S760K): 5.53 / 2.03 / 9.52; P2D (760K): 5.53 / 2.54 / 9.52. No quick-adapter accessory is listed for this style. SWITCHCRAFT original or equivalent. |
| Minimum pin options, OD / ID / length (mm) |
P3A: 2.35 / 0.7 / 11; P3B: 4.0 / 1.7 / 11; P3C: 4.75 / 1.7 / 11. EIAJ equivalent; quick-adapter versions are listed, 5 A maximum. |
| Center pin options, OD / ID / length (mm) |
P4A: 5.5 / 3.4 / 11 / 1.0; P4B: 6.5 / 4.4 / 11 / 1.4; P4C: 7.4 / 5.1 / 11 / 0.6. EIAJ equivalent; dimensions additionally include center-pin diameter; quick-adapter versions are listed, 7.5 A maximum. |
| R6B, locking 3-pin male mini-DIN |
KYCON KPPX-3P equivalent; pins 1 and 3 = +Vo, pin 2 = −Vo. Quick-adapter accessory listed, 7.5 A maximum. |
| R7B, locking 4-pin male mini-DIN |
KYCON KPPX-4P equivalent; pins 1 and 4 = +Vo, pins 2 and 3 = −Vo. Quick-adapter accessory listed, 7.5 A maximum. |
| R7BF, locking 4-pin female mini-DIN |
KYCON KPJX-CM-4S equivalent; pins 1 and 4 = +Vo, pins 2 and 3 = −Vo. No quick-adapter accessory is listed. |
| Stripped and tinned leads |
Lead 1, ribbed = +Vo; lead 2, lettered = −Vo. Lengths by request; MEAN WELL standard L = 25 mm and L1 = 10 mm. No quick-adapter accessory is listed. |
The catalogue offers factory-customized cable terminations subject to minimum order quantity, or the explicitly listed quick-adapter accessories sold separately without a minimum order quantity. These are optional selections, not extra parts included with the stated USB or P1J order number.
Match connector dimensions, mating interface, contact polarity and load current before selecting an accessory. A connector or quick-adapter current ceiling does not increase the power supply rating; the complete assembly remains limited by the lowest applicable electrical rating.
Measurement Conditions and Service Information
| General measurement conditions |
230 VAC input, rated load, 25°C and 70% RH unless otherwise specified. |
| DC voltage set point |
Measured at the output-plug terminal at 50% load. |
| Ripple/noise measurement |
20 MHz bandwidth; 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors. |
| Line-regulation test |
Low-line to high-line input at rated load. |
| Load-regulation test |
10% to 100% rated output load. |
| Catalogue life |
3 years at 100% load, 40°C and 12 hours/day. |
| MTBF, minimum |
400 thousand hours, MIL-HDBK-217F at 25°C. |
| Catalogue version |
2020-10-30; combined PDF pages 6–10. |
Use the manufacturer’s installation instructions for the supplied configuration. The catalogue life and MTBF entries are conditional reference data, distinct from the listed warranty.
