H14950-20

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Product Specification Sheet: H14950-20

Category	Parameter	Specification / Value	Notes / Conditions
General Information	Manufacturer Part Number	H14950-20	The -20 suffix defines this high-performance variant.
	Base Part Number	H14950	Modular photodetector assembly.
	Product Type	Cooled Photon Counting Module	Integrated detector, HV supply, amplifier, and cooler.
	Description	Thermoelectrically Cooled Module for Ultra-Low-Light Detection	The -20 denotes cooling and high-performance specs.
	Manufacturer	Hamamatsu Photonics K.K.
	RoHS Status	Exempt	Due to specialized internal components.
Module Characteristics
	Internal Detector	Photomultiplier Tube (PMT) with High-QE Cathode	e.g., Super Bialkali or similar.
	Cooling System	Integrated Thermoelectric (Peltier) Cooler	The key feature of the -20 variant.
	Spectral Response Range	300 nm to 650 nm	Example range for a high-performance bialkali.
	Peak Wavelength (λp)	400 nm
	Output Signal Type	TTL Pulse / Analog Voltage	Switchable for photon counting or analog operation.
	Supply Voltage	+15 V DC ±10%	Higher current required to drive the TEC.
Electrical Characteristics
	Internal HV Operating Voltage	-1000 V DC	Optimized for high gain.
	Gain (Overall)	Adjustable, up to 10⁹
	Dark Count Rate (Cooled)	< 100 counts per second (cps)	Dramatically reduced by cooling.
	Cooling Temperature	-20°C to 0°C (cathode temperature)	Set point may be adjustable.
Performance & Ratings
	Operating Temperature (Ambient)	+5°C to +40°C	Strict limits due to the cooling system.
	Storage Temperature	-20°C to +60°C
	Photon Counting Resolution	< 1 ns	For precise timing applications.
Physical & Interface
	Package / Housing	Black Anodized Aluminum Case with Heat Sink	Required for dissipating TEC heat.
	Dimensions (L x W x H)	60mm x 60mm x 50mm	Larger than standard modules due to cooler.
	Electrical Connection	Multi-pin Connector (e.g., 9-pin D-Sub)	For power, signal output, and TEC control.
	Optical Input	SM1 (1.035″-40) Threaded Port	Standard size for attaching accessories.
Application & Usage
	Primary Applications	Ultra-Low-Light Detection, Photon Counting, Raman Spectroscopy, LIDAR
	Key Feature	Integrated Thermoelectric Cooler for Minimal Dark Noise	The -20 variant’s defining characteristic.