SMBJ85CA R4 Taiwan Semiconductor, SMBJ85CA R4 Datasheet - Page 7
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SMBJ85CA R4
Manufacturer Part Number
SMBJ85CA R4
Description
TVS Diodes - Transient Voltage Suppressors 85V 600W 5% Bidir
Manufacturer
Taiwan Semiconductor
Datasheet
1.SMBJ30A_R4.pdf
(7 pages)
Specifications of SMBJ85CA R4
Product Category
TVS Diodes - Transient Voltage Suppressors
Rohs
yes
Polarity
Unidirectional
Operating Voltage
85 V
Breakdown Voltage
94.4 V
Clamping Voltage
137 V
Peak Surge Current
100 A
Package / Case
DO-214AA
Minimum Operating Temperature
- 65 C
Maximum Operating Temperature
+ 150 C
Channels
1 Channel
Dimensions
3.73(Max) mm W x 4.75(Max) mm L
Peak Pulse Power Dissipation
600 W (Min)
Part # Aliases
R4 SMBJ85CA
protection. The following is a typical linear power supply with transient voltage suppressor units plaved at
different points. All provide protection of the load.
replacement of the line fuse(F) since it provides a dominant portion of the series impedance when a surge is
encountered.
impedance and the magnitude of surge rushed into the circuit. Otherwise the TVS diode is easy to be
destroyed by voltage surge.
However, since the transformer is a large part of the series impedance, the chance of the line fuse opening
during the surge condition is reduced.
Transient Voltage Suppressor, which is a cost advantage. The series impedance now includes the line fuse,
transformer, and bridge rectifier(B) so failure of the line fuse is further reduced. If onlt Transient Voltage
Suppressor 3 is in use, then the bridge rectifier is unprotected and would require a higher voltage and current
rating to prevent failure by transients.
require varying trade-offs in power supply protection versus maintenance(changing the time fuse).
This reduces the parts count and incorporated the protection within the bridge rectifier.
TVS APPLICATION NOTES:
Transient Voltage Suppressors may be used at various points in a circuit to provide various degrees of
Transient Voltage Suppressor 1 provides maximum protection. However, the system will probably require
Hower, we do not recommend to use the TVS diode here, unless we can know the electric circuit
Transient Voltage Suppressor 2 provides execllent protection of circuitry excluding the transformer(T).
Transient Voltage Suppressor 3 provides the load with complete protection. It uses a unidirectional
Any combination of this three, or any one of these applivations, will prevent damage to the load. This would
An additional method is to utilize the Transient Voltage Suppressor units as a controlled avalanche bridge.