LT450SM Littelfuse Inc, LT450SM Datasheet - Page 2

• Manufacturer Part Number: LT450SM
• Description: GAS TRIGGER TUBE 450V SMD
• Manufacturer: Littelfuse Inc
• Series: LTr

Specifications of LT450SM

• Spark Over Voltage: 450V
• Impulse Discharge Current: 400A
• Package / Case: Non-Standard SMD
• Mounting Type: Surface Mount
• Peak Pulse Current: 400 A
• Dc Breakover Voltage (nominal): 450 V
• Number Of Electrodes: 2
• Termination Style: Solder
• Failsafe Protection Y/n: N
• Dimensions: 8 mm D x 6 mm L
• Mounting Style: SMD/SMT
• Technology: Switching Gas Discharge Tube
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Tolerance: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Gas Plasma Voltage Dependent Switches
Switching Gas Discharge Tubes
Device Ratings and Specifications
RoHS
Electrical Life:
Maximum Ratings:
Notes:
(1) Measured on recommended test circuit (fig 1.)
(2) Measured @ 100 Volts DC
(3) Current required for transition to on-state
(4) Measured @ 1 MHz, zero Volt bias
(5) Measured on recommended test circuit (fig 2.)
Definitions:
V BO – Breakover Voltage
V S – Switching Voltage
V T @ 5A – Nominal Off-state Voltage at 5A
I DRM – Off-state Current
I BO – Nominal Breakover Current
C o - Max Capacitance
V BO to V T – Max switching time from V BO to V T
LT230
LT800
Number
Switching Cycles (5) ………………………………………………………… 400,000
Peak Discharge Current (5) ………………………………………………………. 400 A
Max Switching Frequency ………………………………………………………. 100 Hz
Storage Temperature T STG ……………………………………………………… -40 - +150˚C
Operating Temperature
Part
V
Fig 1. Recommended breakover voltage test circuit
(Discharge current = 10-20mA, sensitivity of
Peak Voltage Detect = 10-30mA)
O.C. DC voltage =1000
LT Series
195 –265
680 – 920
V BO (1)
(V)
0.22µF
51KΩ
……………………………………………………… -40 - +150˚C
184 – 276
640 - 960
(V)
V S
P.V.D.
V T
LT device
(V)
15
15
@ 5A
w w w . l i t t e l f u s e . c o m
I DRM (2)
(A)
1.0
1.0
I BO (3)
50
50
(mA)
V
1000Vdc
C O (4)
2.0
2.0
(pF)
Fig 2. Recommended Life Circuit
V BO to V T
20K
330nF
(nS)
25
25
Ω
0.4µH
LT device
317
7