EV (Environmental Varistors) Metal Oxide Varistors
Definitions
Features
-
Our EV Metal Oxide Varistors have UL and CUL approvals. VDE approvals are pending. Specific types comply with Accelerated Aging Test Requirements per ANSI/IEEE C62.11. Taped Parts conform to EIA standards. All electrical specifications are to industry standards with definitions conforming to IEEE specifications. Solderability to MIL STD. Epoxy flammability rating of 94V0.
- RoHS Compliance - EV Metal Oxide Varistors utilizing suffix (-N) denoting RoHS compliant types for disk sizes 05, 07, 10, 14, 18, 20, 25, 32, 34, 40, and 53 purchased from World Products, LLC. comply with RoHS Directive 2002/95/EC of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment. Our metal oxide varistors contain a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) and of 0.01% weight in homogeneous materials for cadmium. See Part Number System for more details.
- Product consistency is maintained through extremely stringent quality and statistical control. On-line automatic test equipment provides 100% inspection.
- Extensive selection of equivalents to essentially all metal oxide varistor types. All specifications available for proper accurate design-in purposes.
- Extremely low leakage current levels achieved and exceptional surge handling capability through proprietary formulations.
- Epoxy conformity and control providing for consistent physical dimensions and improved solderability.
- Varistor product design flexibility and quick design cycles in order to assist our customers with their most stringent varistor applications.
Definition of Terms
Average Power Dissipation: Tested using two consecutive pulses at rated peak current using a 10/1000µs test waveform with a minimum pulse period of 60 seconds between pulses (IEC 61000-4-5).
Rated RMS Voltage, Rated DC Voltage: The maximum designated values of power system voltage that may be applied continuously between the terminals of a device.
Varistor Voltage: Test characteristic that is used to classify varistors by type. A test current of 1mA DC is typically used to determine varistor voltage classification type. Varistor voltage clamping characteristics can be defined at various test levels.
Rated Peak Single Pulse Transient Current: Maximum surge current, 8/20µs waveform which a varistor is rated to withstand for a single surge.
Rated Single Pulse Transient Energy: Maximum allowable energy for a single impulse (see specified waveforms).
Maximum Clamping Voltage: Measured peak voltage across the device terminals when a current impulse of specified amplitude and waveform is conducted through the varistor.
Typical Capacitance: Typical capacitance values are measured at a test frequency of 1KHZ.
General Characteristics
| Storage Temperature |
- 55° C to + 125° C |
| Operating Surface Temperature |
125° C |
| Operating Ambient Temperature |
- 55° C to + 85° C (without derating) |
| Maximum Voltage-Temperature Coefficient |
< -0.01 % / °C |
| Insulation Resistance |
1000 Megohm min. |
| Hi POT (Leads to Case, 1 min.) |
3000 VDC* |
| Typical Response Time |
< 15 nsec. |
| Epoxy Rating |
94 V-0 |
| Current/Energy Derating (>85°C) |
- 2.5 % / °C |
| DC Leakage Current |
200µA Max (at rated DC working voltage) |
| Solderability |
MIL STD 202G, Method 208H |
| Failure Criteria |
Voltage change ± 10% from initially measured Varistor Voltage. When determining if varistor is within aforementioned criteria the same temperature must be observed as was used for initial Varistor Voltage measurements. |
*Rating is for standard epoxy, for flame retardant coating (suffix "S") disk sizes 5mm to 20mm rating is 2000 VDC, for disk sizes 22mm & 34mm rating is 2500VDC.
Power Dissipation Ratings
| Disc Size |
Pm-watts |
|
Disc Size |
Pm-watts |
| 5mm ( < 50 VAC ) |
0.01 |
20mm ( < 50 VAC ) |
0.20 |
| 5mm ( ≥ 50 VAC ) |
0.20 |
20mm ( ≥ 50 VAC ) |
1.00 |
| 7mm ( < 50 VAC ) |
0.02 |
22mm ( < 50 VAC ) |
0.25 |
| 7mm ( ≥ 50 VAC ) |
0.25 |
22mm ( ≥ 50 VAC ) |
1.20 |
| 10mm ( < 50 VAC ) |
0.05 |
34mm ( < 50 VAC ) |
0.30 |
| 10mm ( ≥ 50 VAC ) |
0.40 |
34mm ( ≥ 50 VAC ) |
1.40 |
| 14mm ( < 50 VAC ) |
0.10 |
|
|
| 14mm ( ≥ 50 VAC ) |
0.60 |
|
|
Part Marking
Date Code
928 = First digit represents year (9 = 2009). Second and third digits represent the week of the year.
Part Numbering System
| EV |
20 |
D |
130 |
K |
W |
- |
J |
S |
I |
X |
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
|
(7) |
(8) |
(9) |
(10) |
|
(1) Series
EV = Environmental Varistor. (All parts are RoHS Compliant and Halogen Free)
(2) Disk Diameter
05 = 5mm, 07 = 7mm, 10 = 10mm, 14 = 14mm,
20 = 20mm, 22 = 22mm, 34 = 34mm
(3) Type
D = Standard
(4) AC RMS Voltage Rating
130 = 130VAC
(5) Tolerance
J = ± 5%, K = ±10%
(6) Lead Option
Nil = Standard wire straight lead configuration
applies for 5mm to 20mm disk size.
(for 22mm & 34mm disk size standard tab lead
configuration applies).
P = Pin Type (only offered for 22mm & 34mm disk size, standard lead configuration applies).
B = Uncoated disk with leads (standard lead configuration applies).
A = Uncoated disk without leads.
PB = Uncoated disk Pin Type (offered only for 22mm & 34mm disk size, standard tab lead
configuration applies).
(7) Surge Type
Nil = Standard Series
J = High Energy
H = Ultra High Energy
(8) Coating Option
Nil = Standard halogen free epoxy coating.
S = Flame retardant coating.
|
(9) Lead Configuration Options (wire or tab type)
(see notes below)
Nil = Straight lead
I = Inward Crimp (wire leads only-not applicable for 22mm & 34mm disk sizes.)
O = Outward Crimp (wire leads only-not applicable
for 22mm & 34mm disk sizes.)
L = InLine Crimp (wire leads only-not applicable for 22mm & 34mm disk sizes.)
N = For ≥420VAC parts requested without inline
crimp (see note 3 below).
(10) Lead Spacing Option
Nil = Standard lead spacing (please reference standard dimensions and lead modification options.)
X = 10mm lead spacing for 20mm disk size
U = 22mm lead spacing for 34mm disk size.
(11) Additional Products
P = Pin type (only available in 22mm & 34mm disk sizes.)
NOTES:
1. For taped parts see taping specifications for suffix code.
2. All disk sizes are available in several lead options. Contact WP for additional information.
3. For disk sizes 5mm through 20mm rated - parts ≥420VAC provided standard with inline crimp (see illustration above) for straight disk seating on PC boards. |
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