METAL OXIDE VARISTORS TNRTMGROUP CHART, P/N SYSTEM

TNR is a our metal oxide varistor metal oxide varistor having steep non-linear V-I characteristics and high discharge
current capability, as follows:◆Metal oxide varistor Features
1. Excellent transient voltage suppression
2. High discharge current capability
3. Wide range of voltage ratings
4. Symmetrical V-I characteristics (Non Polarity)
5. Fast response
6. Steady operation for repeating surge
7. Low temperature coefﬁcient
8. High reliability
9. UL recognized
10. CSA recognized

300200100①

1 2 3 4 5-4◆Applications①-3 -2 -1Current(mA)

Varistor characteristics②100 200 300Voltage(V)① Varistor TNR② SiC Varistor②

1. Electronics instrument protection
2. Telephone system protection
3. Relay contact point protection
4. Rectiﬁcation diode protection
5. SCR protection
6. Reduction of abnormal voltage in high voltage current
7. Switching transistor proteciton
8. Reduction of switching surge in electromagnetic brake
9. Prevention of error in digital circuit
10. Reduction of noise from an abnormal voltage◆Group Chart
H Series

SV Series

V Series

GF Series◆Part Numbering System
The current parts numbering system is changed to new system for global coding.
Your cooperation will be very much appreciated.
123456789101112

T ND 1 4 V- 2 7 1 K B

131415161718①Category

Design CodeLead Forming / Taping
Packing Style⑥
Varistor Volt. Tolerance⑤
Varistor Voltage④
Series③
Size code
Product Form②
Category①

T

Metal Oxide
Varistors
TNR②Product Form

NDNL
V-④Varistor Voltage

The first two digits are significant
figures and the third one denotes
the number of following zeros.
⑤Varistor Volt. Tolerance

Disk TypeSleeve TypeK③Series

BTV Series±10%⑥Packing Style

BulkTaping

Product specifications in this catalog are subject to change without notice.Request our product specifications before purchase and/or use. Please use our products based on the information contained in this catalog and product specifications.

42

CAT. No. E1006G 2024

METAL OXIDE VARISTORS TNRTMTechnical Term

TECHNICAL TERMS ON VARISTORS

Description

Varistor Voltage

Voltage across the varistor measured at CmA DC.
C = 0.1 or 1.0 as specified.

Max. Allowable Voltage(ACrms)Maximum continuous sinusoidal RMS voltage which may be applied.

Max. Allowable Voltage (DC)Maximum continuous DC voltage which may be applied.

Maximum Clamping Voltage

Peak voltage across the varistor, measured under conditions of a specified
peak impulse current and specified waveform (8/20µs) applied 1 time.

Rated Wattage

Maximum power that can be applied within the specified ambient
temperature.

Maximum Peak Current

Surge current withstand refers to the maximum current value that iswithin 10% of the varistor voltage against an initial value when thestandard impulse current at 8/20 µs in accordance with IEC standards
is applied once or twice within a five-minute interval. If this value isexceeded, a Varistor malfunction may result. When selecting a Varistor,
select one that has a higher rate for a surge current than theanticipated surge current rate.

Crest Value
10090Current (%)

Current Wave Form for
Clamping Voltage Test andMaximum Peak Current

5020µs1008µs
Impulse Duration Time

EnergySurge energy withstand refers to the maximum energy value that is within
10% of the varistor voltage against an initial value when a 2ms shortwave
is applied once.
When a Varistor absorbs energy exceeding this value, it may malfunction.
Therefore, when selecting a Varistor, select one that can withstand ahigher energy surge than the anticipated surge energy rate.

Capacitance

Typical value measured at a 1kHz test frequency.
(Sin wave. Reference purpose only)

Product specifications in this catalog are subject to change without notice.Request our product specifications before purchase and/or use. Please use our products based on the information contained in this catalog and product specifications.

43

CAT. No. E1006G 2024