TISP3240F3SL Bourns Inc., TISP3240F3SL Datasheet - Page 11

• Manufacturer Part Number: TISP3240F3SL
• Description: SURGE SUPP 180V BIDIR 3-SL
• Manufacturer: Bourns Inc.

Specifications of TISP3240F3SL

• Package / Case: Radial - 3 Lead
• Voltage - Breakover: 240V
• Voltage - Off State: 180V
• Voltage - On State: 3V
• Current - Peak Pulse (8 X 20µs): 120A
• Current - Peak Pulse (10 X 1000µs): 35A
• Current - Hold (ih): 150mA
• Number Of Elements: 2
• Capacitance: 45pF
• Breakover Current Ibo Max: 7.1 A
• Rated Repetitive Off-state Voltage Vdrm: 180 V
• Off-state Leakage Current @ Vdrm Idrm: 0.01 mA
• Forward Voltage Drop: 3 V
• Mounting Style: Through Hole
• Dc: 0508
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

80
The protection voltage, (V (BO) ), increases under lightning surge conditions due to thyristor regeneration. This increase is dependent on the
rate of current rise, di/dt, when the TISP
be estimated by multiplying the 50 Hz rate V (BO) (250 V/ms) value by the normalized increase at the surge’s di/dt (Figure 7 ). An estimate of the
di/dt can be made from the surge generator voltage rate of rise, dv/dt, and the circuit resistance.
As an example, the ITU-T K.21 1.5 kV, 10/700 µs surge has an average dv/dt of 150 V/µs, but, as the rise is exponential, the initial dv/dt is
higher, being in the region of 450 V/µs. The instantaneous generator output resistance is 25 Ω. If the equipment has an additional series
resistance of 20 Ω, the total series resistance becomes 45 Ω. The maximum di/dt then can be estimated as 450/45 = 10 A/µs. In practice, the
measured di/dt and protection voltage increase will be lower due to inductive effects and the finite slope resistance of the TISP
region.
The off-state capacitance of a TISP
and the a.c. voltage, V d . All the capacitance values in this data sheet are measured with an a.c. voltage of 100 mV. The typical 25 °C variation
of capacitance value with a.c. bias is shown in Figure 17. When V D >> V d , the capacitance value is independent on the value of V d . The
capacitance is essentially constant over the range of normal telecommunication frequencies.
Off-state Capacitance
Capacitance
Protection Voltage
TISP3xxxF3 (HV) Overvoltage Protector Series
®
device is sensitive to junction temperature, T J , and the bias voltage, comprising of the d.c. voltage, V D ,
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0.70
®
device is clamping the voltage in its breakdown region. The V (BO) value under surge conditions can
1
Normalized to V
DC Bias, V
APPLICATIONS INFORMATION
NORMALIZED CAPACITANCE
V
d
RMS AC TEST VOLTAGE
- RMS AC Test Voltage - mV
D
= 0
10
d
Figure 17.
= 100 mV
vs
100
AIXXAA
1000
Specifications are subject to change without notice.
MARCH 1994 - REVISED OCTOBER 2000
®
breakdown