C7247-22

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Product Specifications: Hamamatsu C7247-22

Category	Parameter	Specification / Description
General Information	Product Code	C7247-22
	Product Type	Photomultiplier Tube with Integrated Voltage Divider
	Variant Description	The `-22` suffix strongly indicates a C7247 PMT pre-assembled and packaged with a socket and a soldered voltage divider circuit. This is a plug-and-play unit.
Core PMT (C7247)	Type	Head-On Type with Multialkali Photocathode
	Effective Area	Diameter: 51 mm (2 inches)
	Spectral Response Range	300 nm to 850 nm (Extended Red / NIR response)
	Dynode Structure	Venetian Blind (10 stages)
Integrated Circuit	Component	Voltage Divider (Bleeder Circuit)
	Function	Provides the correct graded voltage to each dynode from a single high-voltage input.
	Connector	Typically a 10-pin or other multi-pin connector for HV input and signal output.
	Key Advantage	Eliminates the complex, error-prone process of designing, building, and soldering your own divider circuit.
Gain	Typical Value	1 x 10<sup>6</sup> (at recommended operating voltage, e.g., -1000 V)
Voltage	Operating Voltage	-1000 V DC (Typical; defined by the integrated divider circuit)
	Polarity	Negative High Voltage (Cathode)
	Input	Via the multi-pin connector on the circuit board.
Output	Signal	Anode Output
	Connector	BNC female connector (standard for these integrated units) for the output signal.
Performance	Dark Current (Typical)	~50 nA (at rated voltage, room temp) (Inherent to multialkali cathode; the unit may be selected for lower current)
	Anode Luminous Sensitivity	40 μA/lm (Typ., at 2856 K)
	Rise Time	14 ns
Mechanical	Configuration	PMT is securely mounted and soldered onto a printed circuit board (PCB).
	Key Advantage	Provides mechanical stability, protects the fragile PMT stem, and simplifies system integration.
	Magnetic Shielding	Not included. A mu-metal magnetic shield (e.g., Hamamatsu A50-XX) is still required for operation in ambient magnetic fields.
Environmental	Operating Temperature	-20 °C to +50 °C
Applications		OEM systems, analytical instruments, and any application requiring simplified integration of a large-area NIR-sensitive PMT.