197
Varistor Products
Revision: January 9, 2009
©2008 Littelfuse, Inc. 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 MOVs
High Reliability Varistors
Description
Littelfuse High Reliability Varistors offer the latest in
increased product performance, and are available for
applications requiring quality and reliability assurance levels
consistent with military or other standards (MIL-STD-19500,
MIL-STD-750, Method 202). Additionally, Littelfuse
Varistors are inherently radiation hardened compared
to Silicon Diode suppressors as illustrated in Figure 1.
Littelfuse High-Reliability Varistors involve five categories:
1 DSSC Qualified Parts List (QPL) MIL-R-83530
(4 items presently available)
2 Littelfuse High Reliability Series TX Equivalents
(29 items presently available)
3 Custom Types
Processed to customer-specific requirements
- (SCD) or to Standard Military Flow
4 Commercial Item Descriptors (CID)
identified for Government use:
CID AA-55564-3 - Littelfuse ZA Series
CID AA-55564-2 - Littelfuse DA, DB Series
Agency Approvals
QP
L
MIL
t %44$"QQSPWFE
t 21--JTUFE
t $&$$$FSUJmFE
t *40"QQSPWFE
t 6-3FDPHOJ[FE
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ZA Series
DA Series
DB Series
198
Varistor Products
©2008 Littelfuse, Inc.
Revision: January 9, 2009
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.
1) DSSC Qualified Parts List (QPL) MIL-R-83530
Table 1. MIL-R-83530/1 Ratings and Characteristics
Part
Number
M83530/
Nominal
Varistor
Voltage
(V)
Tolerance
(%)
Voltage Rating
(V) Energy
Rating
(J)
Clamping
Voltage
at 100A
(V)
Capacitance
at 1MHz (pF)
Clamping
Voltage
At Peak
Current
Rating (V)
ITM (A)
Nearest
Commercial
Equivalent
(RMS) (DC)
1-2000B 200 -/+10 130 175 50 325 3800 570 6000 V130LA20B
1-2200D 220 +10, -5 150 200 55 360 3200 650 6000 V150LA20B
1-4300E 430 +5, -10 275 369 100 680 1800 1200 6000 V275LA40B
1-5100E 510 +5, -10 320 420 120 810 1500 1450 6000 V320LA40B
This series of varistors are screened and conditioned in accordance with MIL-R-83530 as outlined in Table 2.
Manufacturing system conforms to MIL-I-45208; MIL-Q-9858.
Table 2. Mil-R-83530 Group A, B, and C Inspections
Inspection
AQL
(Percent
Defective)
Major Minor
Number
of Sample
Units
Failures
Allowed
Group A SUBGROUP 1
High Temperature Life (Stabilization
Bake)
100% - - - -
Thermal Shock 100% - - - -
Power Burn-In 100% - - - -
Clamping Voltage 100% - - - -
Nominal Varistor Voltage 100% - - - -
SUBGROUP 2
Visual and Mechanical Examination - 1.0% AQL 7.6% LQ 25% AQL 13.0% LQ Per Plan -
Body Dimensions - Per Plan -
Diameter and Length of Leads - Per Plan -
Marking - Per Plan -
Workmanship - Per Plan -
SUBGROUP 3
Solderability - - - Per Plan -
Group B SUBGROUP 1
Dielectric Withstanding Voltage - - - Per Plan -
SUBGROUP 2
Resistance to Solvents - - - Per Plan -
SUBGROUP 3
Terminal Strength (Lead Fatigue) - - - Per Plan -
Moisture Resistance - - - Per Plan -
Peak Current - - - Per Plan -
Energy - - - Per Plan -
Group C EVERY 3 MONTHS
High Temperature Storage - - - 10 0
Operating Life (Steady State) - - - 10 0
Pulse Life - - - 10 0
Shock - - - 10 0
Vibration - - - 10 0
Constant Acceleration - - - 10 0
Energy - - - 10 0
199
Varistor Products
Revision: January 9, 2009
©2008 Littelfuse, Inc. 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 MOVs
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)
VN(DC), VC (Per Specifications Table) II 0.1 -
Dielectric Withstand Voltage
MIL–STD–202, Method 301, 2500V Min. at 1.0μADC
--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
FYUSFNFTNJOVUFT 100%
Humidity Life 85°C, 85% RH, 168 Hrs. 100%
Interim Electrical VN(DC) VC
(Note 3) As specified, but including delta parameter as a minimum. 100% Screen
Power Burn-In 1038 Condition B, 85°C, rated VM(AC), 72 hours min. 100%
Final Electrical +VN(DC) VC
(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%
200
Varistor Products
©2008 Littelfuse, Inc.
Revision: January 9, 2009
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.
3) Custom Types
In addition to our comprehensive high-reliability series, Littelfuse can screen and condition to specific requirements.
Additional mechanical and environmental capabilities are defined in Table 8.
TABLE 8. Mechanical And Environmental Capabilities (Typical Conditions)
Test Name Test Method Description
Terminal Strength MIL-STD-750-2036 3 Bends, 90° Arc, 16oz. Weight
Drop Shock MIL-STD-750-2016 1500g’s, 0.5ms, 5 Pulses, X1, V1, Z1
Variable Frequency Vibration MIL-STD-750-2056 20g’s, 100-2000Hz, X1, V1, Z1
Constant Acceleration MIL-STD-750-2006 V2, 20,000g’s Min
Salt Atmosphere MIL-STD-750-1041 35°C, 24Hr, 10-50g/m2 Day
Soldering Heat/Solderability MIL-STD-750-2031/2026 260°C, 10s, 3 Cycles, Test Marking
Resistance to Solvents MIL–STD–202-215 Permanence, 3 Solvents
Flammability MIL–STD–202-111 15s Torching, 10s to Flameout
Flammability UL1414 3 μ; 15s Torching
Cyclical Moisture Resistance MIL–STD–202-106 10 Days
Steady-State Moisture Resistance MIL–STD–750-1021.3 85/85 96Hr
Biased Moisture Resistance MIL–STD–750-1021.3 Not Recommended for High-Voltage Types
Temperature Cycle MIL–STD–202-107 -55°C to 125°C, 5 Cycles
High-Temperature Life (Nonoperating) MIL-STD-750-1032 125°C, 24Hr
Burn-In MIL-STD-750-1038 Rated Temperature and VRMS
Hermetic Seal MIL-STD-750-1071 Condition D
