■ Extremely high speed performance
■ Blocks high voltages and currents
■ Two TBU® protectors in one small package
■ Simple, superior circuit protection
■ Minimal PCB area
■ RoHS compliant*, UL Recognized
Bourns® Model P850-G Series TBU® HSPs
are not recommended for POTS
applications. This series is suited for
applications requiring a dual bidirectional device
where 50 ohms of series resistance is acceptable.
For new SLIC applications, we recommend that
customers evaluate our TBU-PL Series.
P850-G Series Dual TBU® High-Speed Protectors
Transient Blocking Units - TBU® Devices
Bourns® Model P850-G TBU® products are dual high-speed
bidirectional protection components, constructed
using MOSFET semiconductor technology, designed to protect
against faults caused by short circuits, AC power cross,
induction and lightning surges.
The TBU® high speed protector, triggering as a function of
the MOSFET, blocks surges and provides an effective barrier
behind which sensitive electronics are not exposed to large
voltages or currents during surge events. The TBU® device is
provided in a surface mount DFN package and meets industry
standard requirements such as RoHS and Pb Free solder
UL recognized component File # E315805.
GR-1089 Port Type 3, 5
K.20, K.20E, K.21, K.21E, K.45
Absolute Maximum Ratings (Tamb = 25 °C)
Maximum protection voltage for impulse faults with rise time ≥ 1 µsec
Maximum protection voltage for continuous Vrms faults
Operating temperature range
Storage temperature range
-40 to +85
-65 to +150
Electrical Characteristics (Tamb = 25 °C)
Maximum current through the device that will not cause
Typical current for the device to go from normal operating
state to protected state
Maximum current through the device
Series resistance of the TBU® device
Line-to line series resistance difference between two TBU® devices
Maximum time for the device to go from normal operating state
to protected state
Current through the triggered TBU® device with 50 Vdc circuit voltage
Voltage below which the triggered TBU® device will transition to
normal operating state
The P-G series TBU® devices are bidirectional; speciﬁcations are valid in both directions.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Speciﬁcations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speciﬁc applications.