TMOV25SP385M Littelfuse Inc, TMOV25SP385M Datasheet - Page 26

• Manufacturer Part Number: TMOV25SP385M
• Description: TMOV VARISTOR PB FREE 25S
• Manufacturer: Littelfuse Inc
• Series: iTMOV®r

Specifications of TMOV25SP385M

• Varistor Voltage: 682V
• Current-surge: 20kA
• Number Of Circuits: 1
• Maximum Ac Volts: 385VAC
• Energy: 430J
• Package / Case: Disc 25mm 3-Lead
• Suppressor Type: Varistor
• Peak Surge Current @ 8/20µs: 20000A
• Varistor Case: 25mm DISC
• Clamping Voltage Vc Max: 1010V
• Peak Energy (10/1000us): 430J
• Voltage Rating Vdc: 682V
• Voltage Rating Vac: 385V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Maximum Dc Volts: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Agency Standards
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Littelfuse Varistors have been investigated and evaluated
and are certified, recognized or otherwise approved with
pertinent safety or standards organizations. Following are
descriptions of some of the applicable standards.
Underwriters Laboratories (UL)
UL writes "Standards" to which products are investigated.
Upon completion of the tests, a "Listing" or "Recognition" to
the standard with conditions of acceptability is given under
a unique file number. All of Littelfuse applicable Varistors
are in the "Recognized Components" category to one or
more of the following standards:
(Note that the terms "Approved" or "Certified" are not
correct in referring to devices listed or recognized by UL.)
VDE (Verband Deutscher Electrotechniker)
Based in Germany, this is the Association of German
Engineers who develop specific safety standards and test
requirements. VDE tests and certifies devices or products,
assigning a license number. Littelfuse Radial Varistors are
currently certified under license number 104846–E having
successfully met CECC standard 42 201-006 (issue 1/1996).
CECC (CENELEC Electronic Components Committee)
Based in Brussels, CENELEC is the “European Committee
for Electrotechnical Standardization” which provides
harmonized standards for the European Community based
upon IEC and ISO publications. All Littelfuse Radial Varistor
Series are approved to Specification 42201-006.
CSA (Canadian Standards Association)
Based in Canada, this regulatory agency writes standards
to which it conducts product safety tests. Upon successful
completion, a file number is established, the product is
“Certified” and may display the CSA logo as indication.
Specific Littelfuse Varistors have been tested to CSA
Standard number 22.2, No.1-94. Littelfuse file number is
LR91788.
NSAI (National Standards Authority of Ireland)
This Irish testing organization is facilitated and authorized
to evaluate products to the various Euro Norms CECC
specifications thereby granting declarations of conformity.
UL1449 Transient Voltage Suppressors.
UL1414 Across the Line Capacitors, Antenna
Coupling and Line By-Pass Capacitors for
Radio and Television Type Appliances.
UL497B Protectors for Data and
Communication and Fire Alarm Circuits.
Revision: November 5, 2009
Varistor Products
22
Electrostatic Discharge (ESD) Standards
Several industry standards and specifications exist that
are used to qualify and quantify ESD events. Since many
circuits or systems must demonstrate immunity to ESD,
these standards are often incorporated in the testing of
ESD capability. Of particular concern is the immunity level
for semiconductors. The "standards" include Human Body
Model (HBM) to MIL -STD-883, Machine Model (MM) such
as EIAJ IC121, and Charged Device Model (CDM) such
as US ESD DS 5.3. The Human Body Model, Machine
Model and Charged Device Model primarily relate to
manufacturing and testing process of an IC.
One of the most severe is IEC 61000-4-2 from the
International Electrotechnical Commission (IEC) and
referenced in the EMC directive. Level 4 of this test
method is the highest level, subjecting the device under
test to 8kV contact discharge method (preferred) and/or
15kV air discharge. Each Littelfuse technology is designed
for this level. The recommended types are the Silicon
based Silicon Protection Array SP05x and SP7X, the
polymeric VVM based PulseGuard
ML, MLE, MHS or MLN Multilayers.
The designer should be aware of the ESD ratings of
the semiconductors used in the circuit. For example,
semiconductor manufacturers that rate their devices to
MIL -STD-883 to 2kV may not pass 2kV when subjected to
the more difficult IEC test method (150pF / 330Ω instead
of 100pF / 1500Ω). Additionally, even if semiconductors
do meet some level of ESD immunity to IEC standards,
that does not imply that additional ESD suppression is not
required. Real world ESD transients can exceed the peak
currents and voltages as defined by the standards and can
have much faster rise times.
IEC 61000-4-2 consists of four test severity levels of
ESD immunity using both a Contact Discharge and Air
Discharge test method. The EUT or DUT may be subjected
to increasing levels of severity until failure. Or, a particular
level of immunity may be prescribed for EM compatibility
of an end product.
For more information about the IEC 61000-4-2 test method,
see Application Note AN9734, “IEC Electromagnetic
Compatibility Standards for Industrial Process
Measurement and Control Equipment. ”
Please refer to www.littelfuse.com for current information.
Specifications are subject to change without notice.
®
Suppressor, and the
©2009 Littelfuse, Inc.