S11866-128G-02

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Parameter Table: S11866-128G-02 Photomultiplier Tube Module

The following table lists the key specifications for the Hamamatsu S11866-128G-02 PMT module. This model combines the low-voltage operation of the S11866 series with a larger photosensitive area.

Parameter Category	Parameter	Symbol	Min.	Typ.	Max.	Unit	Conditions / Notes
General	Model Number	—		S11866-128G-02		—	Ultra-Compact PMT Module
	Product Type	—		PMT Module		—	Integrated HV power supply
	Series	—		S11866		—	Low-voltage series
Optical Characteristics	Spectral Response Range	λ	300		650	nm	—
	Peak Wavelength	λₚ		420		nm	Bialkali photocathode
	Photosensitive Area	—		Circular, Ø 8		mm	Balanced light collection
	Cathode Radiant Sensitivity	—		52		mA/W	@ λₚ (420 nm)
	Cathode Luminous Sensitivity	Sₖ	60			μA/lm	Vᵣ = 1.0 V, T_a = 25°C
	Dark Current	I_d			1.0	nA	Vᵣ = 1.0 V, after stabilization
Electrical Characteristics	Supply Voltage	Vᵣ	0.9	1.0	1.2	V DC	Single Battery Operation
	Supply Current	Iᵣ		20		mA	@ Vᵣ = 1.0 V
	Output Current	I_out			10	μA	—
	Rise Time	t_r		15		ns	Slower than S11865 series
	Fall Time	t_f		18		ns	—
Mechanical Characteristics	Window Material	—		Borosilicate Glass		—	—
	Housing Material	—		Plastic		—	Not metal shielded
	Connector	—		Micro-lead (Cable)		—	Direct solder/cable connection
	Lead Length	—		100		mm	Typical for -02 suffix
	Dimensions (L x W x H)	—		22 x 12.5 x 10		mm	Extremely compact
	Weight	—		~2.5		g	Very lightweight
Environmental	Operating Temperature	T_op	-10		60	°C	—
	Storage Temperature	T_stg	-20		70		—