SpellmanHV MFX Series 50-75W Industrial X-Ray Generators

MFX Series

  • 50kV with 50 or 75 Watt Max
  • 65kV with 65 Watt Max
  • Floating Integrated Filament Supply
  • Local and Remote Emission Control
  • Optional Digital Interface

*Note: All specifications are subject to change without notice. Please consult the English PDF version of this datasheet for the most up-to-date revision.

Two Year Extended Warranty & RoHS Compliant Logos

50-75W Industrial X-Ray Generators

The MFX Series is the result of Spellman’s exceptional high voltage packaging and surface mount fabrication techniques, coupled with its proprietary encapsulation technology producing this ultra compact-sized OEM X-Ray generator module.

The MFX Series is designed to power floating filament X-Ray tubes from various manufacturers. It features a 0 to 50kV (or 0 to 65kV) high voltage output, and up to 2mA of emission current limited to 50, 65 or 75 Watts, operating from a +24Vdc input. The MFX utilizes a closed loop fila­mentry beam control circuit to provide a highly regulated beam current. The floating ac filament supply operates between 0.3 and 4 amps. Offering tight regulation, high stability and low ripple, the MFX provides users both local and remote analog control to set beam voltage, emission current and filament current limit. An optional USB, RS-232 and Ethernet interface is available.


(Ref. 128101-001 REV. K)

+24Vdc ±10%, 5.0A maximum for either 50 Watts or 75 Watts.
+24Vdc ±1V, 5.0A maximum for 65kV/65W units.
80-85%, typical
0 to 50kV at 0 to 2mA, limited to a maximum of 50 watts or 75 Watts. 0-65kV at 2mA limited to 65 Watts. Negative output polarity.
Voltage Control:
Local: Internal multi-turn potentiometer to set voltage from 0 to full output voltage.
Remote: 0 to +10Vdc proportional from 0 to full output voltage.
Accuracy: ±1%. ZIN: 10Mohm.
Emission Control:
Local: Internal potentiometer to set beam current between 0 and full output current.
Remote: 0 to +10Vdc proportional from 0 to full output current.
Accuracy : ±1%. ZIN: 10Mohm. Filament limit and filament preheat control capability is also provided.
High Frequency AC Filament Supply:
Current: 0-4A, adjustable limit
Voltage: 5.0 volt limit
Voltage Regulation:
Load: 0.01% of output voltage no load to full load.
Line: ±0.01% for ±10% change in input voltage.
Current Regulation:
Load: 0.01% of output current from 0 to rated voltage.
Line: ±0.01% for ±10% change in input voltage.
0.1% p-p of maximum rated output voltage, 50kV units (50/75W)
0.1% rms maximum rated output voltage, 65kV units (65W)
Operational: 0°C to +50°C
Storage: -40°C to +85°C
Humidity: 0% to 90%, non-condensing
Temperature Coefficient:
0.01% per °C, voltage and current.
0.05% per 8 hours after 1/2 hour warm-up.
Voltage and Current Monitors:
0 to +10Vdc proportional from 0 to rated output. Accuracy ±1%.
50kV Unit: 7.00”H x 2.87”W x 8”D (177.80mm x 72.90mm x 203.25mm)
65kV Unit: 7.00”H x 2.87”W x 9”D (177.80mm x 72.90mm x 228.65mm)
SIC Option: 7.75”H x 2.87”W x 8”D/9”D (196.85mm x 72.90mm x 203.25mm/228.65mm)
7.0 lbs. (3.2kg)
Regulatory Approvals:
RoHS compliant.
See product PDF for more specification and features.


Pin Signal Parameters
1 +24V Input +24 volts @ 5A, max.
2 24V Return (Gnd.) Power Ground


Pin Signal Parameters
1 Monitor Return Signal Ground
2 Voltage Monitor 0-10 volts = 0 to full scale, Zout=1KΩ
3 Current Monitor 0-10 volts = 0 to full scale, Zout=1KΩ
4 Interlock Output Connect 12V HVON bulb to pin 15 to enable
5 +10 Volt Reference +10 Volts @ 1mA, maximum
6 Filament Monitor 1 volt = 1 amp, Zout=1KΩ
7 Voltage Program Input 0-10 volts = 0 to full scale, Zin=10MΩ
8 Local Voltage Program* 10 turn pot., screwdriver adjust
9 Filament Limit Setpoint* 1 volt = 1 amp, screwdriver adjust
10 Current Program Input 0-10 volts = 0 to full scale, Zin=10MΩ
11 Local Current Program* 10 turn pot, screwdriver adjust
12 Not used (+24V Out for Interlock) (Optional Interlock configuration)
13 Not used (Interlock Coil) (Optional Interlock configuration)
14 Filament Preheat Setpoint* 1 volt = 1 amp, screwdriver adjust
15 Interlock Return Interlock Ground

*Denotes 10 turn potentiometer located on front panel 


Pin Output Connection
C (common) -High Voltage Output
S (small) -High Voltage Output
L (large) Filament Output
G (grid) Filament Output

Note: No high voltage cable is provided

Recommended Cable:
Claymount part number: 11470
Cable assembly, L3 CA11, CA11, 10F, CS=Bare 10 foot, Mini Federal Connectors on both ends, "C" and "S" are both connected to the bare wire

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