Name: MEAN WELL VFD series: variable frequency drive module - VFD-250P-48
Brand: MEAN WELL
SKU: VFD-250P-48
Price: 48.79 USD
Availability: InStock

MEAN WELL VFD series: variable frequency drive module - VFD-250P-48

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Description

MEAN WELL VFD-250P-48 Variable Frequency Drive Module

The MEAN WELL VFD-250P-48 is a 250 W, PCB-type variable frequency drive power module for three-phase motor systems. It accepts 20-55 VDC and provides 0-34 V line-to-line PWM-controlled output, with 7.2 A rated current subject to the voltage/current envelope below. An external motor controller is required to generate the switching signals and implement the motor-control and supervisory functions. The VFD-CB motor control board is available separately.

Download MEAN WELL VFD Datasheet (PDF)

Model-specific information is on PDF pages 52-59. Use the specification, V/I curve and installation drawings together when selecting the motor and cooling arrangement.

Product selection and model code

Parameter	Details
Full model	VFD-250P-48
Model code	VFD identifies the variable frequency drive module family; 250 is the wattage designation; P denotes a PCB type; 48 is the nominal output-voltage code.
System role	Integrated three-phase power stage, gate drivers, phase-current sensing, DC-bus voltage sensing and temperature sensing. Motor control is supplied by an external controller.
Motor applications	Three-phase 48 V class motors, including BLDC, induction motors and synchronous reluctance motors (SynRM), with suitable external control. Applications include fans, water/air pumps, HVAC, conveyors, automatic doors, power tools and fitness equipment.
Motor selection	A three-phase 48 V motor is recommended. When using a 12 V or 24 V class motor, check motor current against the module limits.

Output ratings and peak conditions

Parameter	Details
Rated output power	250 W; available output also depends on line-to-line voltage, input voltage and cooling.
PWM output voltage	0-34 V line-to-line, adjusted by PWM modulation; 55 V maximum switching level. The DC bus follows the DC input.
Rated / peak current	7.2 A rated; 14.4 A peak for up to 5 seconds (200% of rated current). These maxima apply only within the V/I and derating envelope.
V/I envelope	The V/I curve shows 7.2 A continuous and 14.4 A peak up to 20 V line-to-line. Above this point, allowable current falls with output voltage; at 34 V, the plotted limits are 4.3 A continuous and 8.6 A peak. Do not combine the maximum voltage with the maximum low-voltage current.
Peak duty	The illustrated peak-current profile is 200% for 5 seconds followed by 90% for 55 seconds. It is a published duty example, not permission to ignore the V/I, input and temperature limits.
PWM frequency	2.5-15 kHz switching frequency; this is not a specified motor-speed command range.
Efficiency	93% catalog value, tested with an inductive load at rated current and full power. Unless otherwise stated, specification measurements use 48 VDC input, rated load and 25°C ambient; efficiency varies with input and load.

Input and DC bus

Parameter	Details
Input	20-55 VDC. Observe DC polarity.
Input current	5.6 A at 48 VDC, typical
DC-bus voltage	The DC bus follows the 20-55 VDC input. There is no AC-input PFC boost stage in this DC-input model.
Input-voltage derating	The published curve permits 50% load at 20-28 VDC, rising linearly to 100% at 40 VDC; 100% is shown from 40 to 55 VDC, subject to temperature and V/I limits.

External control, sensing and protection

Parameter	Details
PWM interface	CN93 pins 8-13 are the six PWM logic inputs for the three half bridges. 3.3 V TTL/CMOS: ON above 2.7 V; OFF below 0.4 V. Maintain a minimum 300 ns dead time between the upper and lower switch of each phase. Confirm the high/low-side gate assignment for the exact module and controller before connection.
Current sensing	CN93 pins 4, 5 and 6 provide U, V and W low-side shunt signals; each shunt is 6 mΩ. Use a short external sensing path and suitable amplifier/ADC circuitry for motor-current control.
Bus sensing	CN93 pin 1 provides a DC+ sensor signal of 2.5 V at a 48 V DC bus, referenced to pin 2 (DC-). Bus voltage = sensor voltage x 48 / 2.5.
Auxiliary supply	CN93 pin 14 relative to pin 2 (DC-): non-isolated 15 V, 0.2 A maximum; tolerance ±0.5 V and ripple 1 V peak-to-peak maximum. Design the controller interface for the non-isolated reference.
Fault output	CN93 pin 7 is the inverter short-circuit/overcurrent fault signal: 3.3 V TTL/CMOS, normal high above 3 V and abnormal low below 0.5 V.
Short circuit / overcurrent	Internal protection shuts down the gate driver when output current exceeds 200% of rated current. The specification states output shutdown with re-power-on recovery. The active-low fault output informs the external controller; do not treat it as a substitute for coordinated system protection.
Bus-voltage supervision	The external controller must stop PWM when the DC bus exceeds 60 V. Use the bus-sensor signal for application-level overvoltage/undervoltage supervision; these sensor outputs are not a claim of complete autonomous OVP/UVP control.
Thermal supervision	CN93 pin 3 connects the built-in 10 kΩ NTC temperature sensor, type TSM2A103F34D1R (Thinking Electronic). The function manual recommends stopping PWM when the sensed power-device temperature exceeds 115°C. This is an internal-device threshold, not an ambient operating limit.
Regenerative braking	For regenerative motor deceleration, the application drawing recommends an external braking circuit/device at the DC input. Coordinate PWM shutdown or braking to prevent the DC bus exceeding 60 V. A brake resistor/device is not specified as included.

Environment, cooling and installation

Parameter	Details
Ambient operating range	-30 to +70°C, subject to the cooling and derating conditions below.
Cooling / thermal derating	Fanless module. At 48 VDC the horizontal-mounting curve shows 250 W from -30 to +50°C, falling to 150 W at +70°C. At 24 VDC it shows 125 W through +50°C and 90 W at +70°C. Apply the lower permissible load from the input, temperature and V/I curves.
Operating humidity	20-90% RH, non-condensing.
Storage	-40 to +85°C; 10-95% RH, non-condensing.
Vibration	10-500 Hz, 2 G; 10 minutes per cycle, 60 minutes in each X, Y and Z axis.
Dimensions	101.6 x 50.8 x 28.6 mm (L x W x H); mechanical drawing tolerance ±1 mm.
PCB installation	Four Ø3.5 mm mounting holes on a 95.25 x 44.45 mm pattern; allow for components projecting up to 3 mm below the PCB. Integrate the exposed PCB in a suitable enclosure with the required electrical clearances and cooling.

Connections and separately selected items

Parameter	Details
DC input connector	CN1: JST B2P-VH or equivalent; pin 1 DC INPUT+, pin 2 DC INPUT-. Use a JST VHR mating housing and JST SVH-21T-P1.1 terminals, or equivalent.
Motor-output connector	CN2: JST B6P-VH or equivalent; pins 1/2 U, pins 3/4 V, pins 5/6 W. Use JST VHR mating housing and JST SVH-21T-P1.1 terminals, or equivalent.
Control connector	CN93: HRS DF11-14DP-2DS or equivalent. Mating housing: HRS DF11-14DS; terminal family: HRS DF11-**SC, or equivalent. The asterisks identify the catalog terminal family, not a single complete ordering code.
Separate control-board option	VFD-CB motor control board, quantity 1 in the catalog accessory list. The motor control board and VFD drive module must be ordered separately. Confirm the application-specific control configuration with MEAN WELL; this module SKU does not include the optional board.
Other integration items	Motor, external controller or VFD-CB, wiring/connectors, cooling hardware and regenerative-braking components must be selected for the application. The catalog also describes a demonstration kit built around VFD-350P-230 and a 230 V motor; that kit is a separate item, not supplied with this module.

Standards and catalog reference

Parameter	Details
Listed safety approvals	The model specification lists CB IEC 61800-5-1, TUV/BS EN/EN 61800-5-1 and EAC TP TC 004 approvals.
EMC classification	BS EN/EN IEC 61800-3: conducted and radiated emissions Class A, category C2; immunity for the second environment. The completed motor-drive system must be assessed with its controller, motor, wiring and installation.
Catalog mass reference	90 g per unit (0.09 kg), taken from the catalog PACKING field. This is the catalog packing reference per unit, not a measured net weight or a shipment-weight guarantee.