MEAN WELL PPT-125C is an open-frame AC/DC power supply with three outputs: +5 V, +15 V, −15 V. Its combined output rating is 100 W with natural convection or 125.15 W with 18 CFM forced airflow, subject to the individual current ranges and derating limits.
Product Datasheet
Download MEAN WELL PPT-125 Datasheet (PDF)
The PPT-125 section is on PDF pages 10, 11. Refer to the complete mechanical drawings and notes when planning installation.
Model and Selection
Complete model
PPT-125C.
Series and format
PPT-125 triple-output, 5-inch × 3-inch open-frame power supply.
Power conversion
Built-in active PFC; PWM control and regulation.
Output arrangement
CH1, CH2 and CH3 are the three rails of one complete power supply and share the GND terminals.
Natural-convection combined rating
100 W.
18 CFM combined rating
125.15 W.
Power-on indication
LED indicator; LED1 is marked in the mechanical drawing.
Factory test
100% full-load burn-in.
Observe all three channel minimum loads, their cooling-dependent current limits and the combined-power limit together. Do not add the individual maximum current ratings into an unrestricted system-power rating.
CH1 Output
Nominal output
+5 VDC relative to GND.
Rated current
11 A.
Natural-convection current range
1–11 A.
18 CFM current range
1–13.75 A.
Ripple and noise, maximum
100 mVp-p.
Voltage tolerance
±3.0%.
Line regulation
±0.5%.
Load regulation
±3.0%.
Voltage adjustment
4.75–5.25 V on CH1, using SVR1.
CH2 Output
Nominal output
+15 VDC relative to GND.
Rated current
2.5 A.
Natural-convection current range
0.25–2.5 A.
18 CFM current range
0.25–3.13 A.
Ripple and noise, maximum
150 mVp-p.
Voltage tolerance
±5.0%.
Line regulation
±0.5%.
Load regulation
±3.0%.
CH3 Output
Nominal output
−15 VDC relative to GND.
Rated current
0.5 A.
Natural-convection current range
0.05–0.5 A.
18 CFM current range
0.05–0.63 A.
Ripple and noise, maximum
150 mVp-p.
Voltage tolerance
±6.0%.
Line regulation
±0.5%.
Load regulation
±5.0%.
Output Conditions
Efficiency, typical
78%.
Tolerance definition
Includes set-up tolerance, line regulation and load regulation.
Unless otherwise stated, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple and noise are measured with 20 MHz bandwidth using a 12-inch twisted pair terminated with parallel 0.1 µF and 47 µF capacitors. Maintain the specified minimum load on every channel.
Input and Timing
AC input
90–264 VAC; 47–63 Hz.
DC input
127–370 VDC.
Power factor, typical
PF >0.93 at 230 VAC and >0.98 at 115 VAC, at full load.
AC current, typical
1.7 A at 115 VAC; 0.75 A at 230 VAC.
Cold-start inrush, typical
24 A at 230 VAC.
Leakage current
<2 mA at 240 VAC.
Set-up / rise time
1000 ms / 30 ms at 230 VAC; 2000 ms / 30 ms at 115 VAC, at full load.
Hold-up time, typical
24 ms at 230 VAC and 24 ms at 115 VAC, at full load.
Switching frequency
100 kHz.
Protection
Short circuit / overload
130–160% of rated output power; foldback current limiting, with automatic recovery after the fault is removed.
CH1 overvoltage
5.75–6.75 V; hiccup mode, with automatic recovery after the fault is removed.
Cooling and Environment
Working ambient
−20 to +70°C, subject to the applicable horizontal-installation derating curve.
Natural-convection temperature curve
100% of the natural-convection reference through 30°C, decreasing to 70% at 50°C and 40% at 60°C. This curve ends at 60°C.
18 CFM temperature curve
The graph shows a 125% load reference through 50°C, decreasing to 50% at 70°C. Apply this plotted reference together with the separate model-specific 18 CFM current and combined-power ratings.
Input-voltage curve
The 60 Hz graph rises from 80% at 85 VAC to 100% at 100 VAC and stays at 100% through 264 VAC. Operate within the specified 90–264 VAC range; the 85 VAC graph point does not extend the input rating.
Altitude derating
Above 2000 m, reduce allowable ambient by 3.5°C per 1000 m for fanless cooling, or by 5°C per 1000 m with fan cooling.
Working humidity
20–90% RH, non-condensing.
Storage
−40 to +85°C; 10–95% RH.
Temperature coefficient
±0.05%/°C over 0–50°C.
Vibration
10–500 Hz, 2 G; 10 minutes per cycle, for 60 minutes along each X, Y and Z axis.
Apply input-voltage and ambient-temperature derating together. Provide the specified airflow for forced-air operation, following the airflow direction shown in the mechanical drawing. The fan and its mounting hardware are not stated as included.
Dimensions and Installation
Dimensions, L × W × H
127 × 76.2 × 34.6 mm.
Board format
5-inch × 3-inch format; the series feature list quotes 6.117 W/in³ power density.
Mounting holes
Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans. The drawing marks a 5 mm left offset and 6.4 mm top offset. General tolerance ±1 mm.
Underside clearance
Allow for the 3 mm maximum underside projection shown in the drawing.
Safety grounding
M1 is safety ground. Electrically connect M1 and M2 to chassis ground for EMC performance.
Heat-sink separation
HS1, HS2 and HS3 must not be shorted together.
Fitted AC fuse
FS1: T2A/250VAC.
Adjustment and indication
SVR1 adjusts CH1; LED1 indicates power on.
Use the complete mechanical drawing for mounting, connector orientation and airflow. Install this component power supply in suitable final equipment.
Connections and Mating Parts
AC input CN1
JST B3P-VH or equivalent: pin 1 AC/L; pin 2 no pin; pin 3 AC/N.
DC output CN4
The catalogue specifies JST B5P-VH × 2 or equivalent, with positions numbered 1–10: pin 1 CH3 (−15 V); pins 2 and 3 CH2 (+15 V); pins 4–8 GND; pins 9 and 10 CH1 (+5 V).
Mating housings
JST VHR family or equivalent; select the complete housing reference for the shown connector arrangement and circuit count.
Mating contacts
JST SVH-21T-P1.1 or equivalent.
Maintain the indicated rail polarities, including any negative CH3 output. Use the complete pin-numbered drawing when assembling the mating connectors. Loose housings, contacts and mounting hardware are not stated as included.
Safety and EMC
Safety approvals
UL62368-1, TUV BS EN/EN62368-1, AS/NZS 62368.1 and EAC TP TC004 approved; the cover also identifies IEC62368-1 CB certification.
Withstand voltage
Input/output 3 kVAC; input/FG 2 kVAC; output/FG 0.5 kVAC.
Insulation resistance
Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH.
Emissions
BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020.
Immunity
BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035, light-industry level; EAC TP TC020.
EMC tests use a 360 × 360 mm metal plate, 1 mm thick. Reconfirm compliance in the completed equipment with its actual wiring and mounting; component approvals do not certify the complete system.
Weight and Reliability
Single-unit catalogue reference weight
370 g from the explicit per-unit PACKING value; a catalogue reference rather than measured net or shipping weight.
Packing reference
0.37 kg per unit; 36 pieces / 14.3 kg / 0.96 CUFT.
MTBF, minimum estimates
2173.4 thousand hours, Telcordia SR-332 (Bellcore); 269.9 thousand hours, MIL-HDBK-217F at 25°C.
Manufacturer warranty
3-year manufacturer warranty, subject to applicable terms.
Catalogue revision
PPT-125-SPEC, 2024-10-30; PDF pages 10–11.
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