Littelfuse High Reliability Varistors - Manual (Page 3)

© 2013 Littelfuse, Inc. 203
Revised: May 8, 2013
Varistor Products
High Reliability Varistors
High Reliability Varistors
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
High Reliability
2) Littelfuse High Reliability Series TX Equivalents
TABLE 5. Available TX Model Types
TX Model Model Size
Device
Mark
(See Section
4) Nearest
Commercial
Equivalent
V8ZTX1
V8ZTX2 7mm
10mm
8TX1
8TX2 V8ZA1
V8ZA2
V12ZTX1
V12ZTX2 7mm
10mm
12TX1
12TX2 V12ZA1
V12ZA2
V22ZTX1
V22ZTX3 7mm
14mm
22TX1
22TX3 V22ZA1
V22ZA3
V24ZTX50 20mm 24TX50 V24ZA50
V33ZTX1
V33ZTX5
V33ZTX70
7mm
14mm
20mm
33TX1
33TX5
33TX70
V33ZA1
V33ZA5
V33ZA70
V68ZTX2
V68ZTX10
7mm
14mm
68TX2
68TX10
V68ZA2
V68ZA10
V82ZTX2
V82ZTX12
7mm
14mm
82TX2
82TX12
V82ZA2
V82ZA12
TX Model Model Size
Device
Mark
(See Section
4) Nearest
Commercial
Equivalent
V130LTX2
V130LTX10A
V130LTX20B
7mm
14mm
20mm
130TX
130TX10
130TX20
V130LA2
V130LA10A
V130LA20A
V150LTX2
V150LTX10A
V150LTX20B
7mm
14mm
20mm
150TX
150TX10
150TX20
V150LA2
V150LA10A
V150LA20B
V250LTX4
V250LTX20A
V250LTX40B
7mm
14mm
20mm
250TX
250TX20
250TX40
V250LA4
V250LA20A
V250LA40B
V420LTX20A
V420LTX40B 14mm
20mm 420TX20
420TX40 V420LA20A
V420LA40B
V480LTX40A
V480LTX80B 14mm
20mm 480TX40
480TX80 V480LA40A
V480LA80B
V510LTX40A
V510LTX80B 14mm
20mm 510TX40
510TX80 V510LA40A
V510LA80B
The TX Series of varistors are 100% screened and conditioned in accordance with MIL-STD-750.Tests are as outlined in Table 6.
INSPECTION LOTS
FORMED AFTER
ASSEMBLY
>
LOTS PROPOSED
FOR TX TYPES
>
100% SCREENING
>
REVIEW OF DATA
TX PREPARA TION
FOR DELIVERY
>
QA ACCEPTANCE
SAMPLE PER
APPLICABLE DEVICE
SPECIFICATION
TABLE 6. TX Equivalents Series 100% Screening
MIL-STD-105
LTPD
LEVEL AQL
Electrical (Bidirectional)
V
N(DC)
, V
C
(Per Specifications Table)
II 0.1 -
Dielectric Withstand Voltage
MIL–STD–202, Method 301, 2500V Min. at 1.0
μA
DC
- - 15
Solderability
MIL–STD–202, Method 208, No Aging, Non-Activated
- - 15
TABLE 7. Quality Assurance Acceptance Test
Screen
MIL-STD-750
Method
Condition TX Requirements
High Temperature Life
(Stabilization Bake)
1032 24 hours min at max rated storage temperature. 100%
Thermal Shock
(Temperature Cycling) 1051
No dwell is required at 25°C. Test condition A1, 5 cycles -55°C to +125°C
(extremes) >10 minutes.
100%
Humidity Life 85°C, 85% RH, 168 Hrs. 100%
Interim Electrical V
N(DC)
V
C
(Note 3)
As specified, but including delta parameter as a minimum. 100% Screen
Power Burn-In 1038 Condition B, 85°C, rated V
M(AC)
, 72 hours min. 100%
Final Electrical +V
N(DC)
V
C
(Note 3)
As specified - All parameter measurements must be completed within 96
hours after removal from burn-in conditions.
100% Screen
External Visual
Examination
2071 To be performed after complete marking. 100%