www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28733
182 Revision: 20-Sep-07
VR37
Vishay BCcomponents
High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors
A metal glazed film is deposited on a high grade ceramic
body. After a helical groove has been cut in the resistive
layer, tinned electrolytic copper wires are welded to the
end-caps. The resistors are coated with a light blue lacquer
which provides electrical, mechanical, and climatic
protection.
The encapsulation is resistant to all cleaning solvents in
accordance with “MIL-STD 202E, method 215” and
“IEC 60068-2-45”.
FEATURES
•Lead (Pb)-free solder contacts
•These resistors meet the safety requirements
of:
“UL1676” (510 kΩ to 11 MΩ); File No: E171160
“IEC 60065”
“EN60065”
“VDE 0860” (Germany)
“CQC” (China)
•High pulse loading capability (10 kV)
•Small size (0309)
•Pure tin plating provides compatibility with lead (Pb)-free
and lead containing soldering processes
•Compatible with “Restriction of the use of Hazardous
Substances” (RoHS) directive 2002/95/EC (issue 2004)
APPLICATIONS
•Where high resistance, high stability and high reliability at
high voltage are required
•Safety component in combination with high voltage
•White goods
•High humidity environment
•Power supplies
Notes:
(1) Ohmic values (other than resistance range) are available upon request.
REG.-Nr. 40002857
TECHNICAL SPECIFICATIONS
DESCRIPTION VALUE
Resistance range (1) 100 kΩto 33 MΩ
Resistance tolerance and series ± 1 %: E24/E96 series;
± 5 %: E24 series
Maximum dissipation at Tamb =70°C0.5W
Thermal resistance, Rth 120 K/W
Temperature coefficient ≤± 200 x 10-6/K
Maximum permissible voltage:
DC 3500 V
RMS 2500 V
Dielectric withstanding voltage of the insulation for 1 minute 700 V
Basic specifications IEC 60115-1B
Safety requirements UL1676 (510 kΩto 11 MΩ); EN60065; VDE 0860; CQC
Climatic category (IEC 60068) 55/155/56
Stability after:
load (1000 hours) ΔR max.: ± (1.5 % R+0.1Ω)
accelerated damp heat test (6 days) ΔR max.: ± (1.5 % R+0.1Ω)
long term damp heat test (56 days) ΔR max.: ± (1.5 % R+0.1Ω)
Noise max. 2.5 µV/V
Document Number: 28733 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com
Revision: 20-Sep-07 183
VR37
High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors Vishay BCcomponents
12NC INFORMATION
•The resistors have a 12-digit numeric code starting with
2322 242.
•The subsequent:
first digit for 1 % tolerance products (E24 and E96 series)
or 2digits for 5 %(E24series) indicate the resistor type
and packaging
•The remaining digits indicate the resistance value:
– The first 3 digits for 1 % or 2 digits for 5 % tolerance
products indicate the resistance value
– The last digit indicates the resistance decade
Last Digit of 12NC Indicating Resistance Decade
12NC Example
The 12NC for a VR37, resistor value 7.5 MΩ, 5 % tolerance,
supplied on a bandolier of 1000 units in ammopack, is:
2322 242 13755.
Note:
(1) Please refer to table PACKAGING.
• The PART NUMBER is shown to facilitate the introduction of a unified part numbering system for ordering products.
RESISTANCE DECADE LAST DIGIT
100 to 976 kΩ4
1to9.76MΩ5
≥ 10 MΩ6
12NC - resistor type and packaging
TYPE
TAPE
WIDTH
(mm)
TOL.
(%)
ORDERING CODE 2322 242 .....
BANDOLIER IN AMMOPACK BANDOLIER ON REEL
1000
units
5000
units
VR37 52 ± 1 8.... 6....
± 5 13... 23...
PART NUMBER
PART NUMBER: VR37000001503JA100
VR37000001503JA100
MODEL/SIZE SPECIAL CHARACTER TCR/MATERIAL VALUE TOLERANCE PA CK AG I N G (1) SPECIAL
VR37000 0 = neutral
Z = value overflow
(Special)
0 = standard 3 digit value
1 digit multiplier
Multiplier:
3 = *103
4 = *104
5 = *105
F = ± 1 %
J = ± 5 %
A1
R5
The 2 digits
are used for
all special
parts.
00 = standard
PRODUCT DESCRIPTION: VR37 5 % A1 150K
VR37 5 % A1 150K
MODEL/SIZE TOLERANCE PACKAGING (1) RESISTANCE VALUE
VR37 ± 1 %
± 5 %
A1
R5
150K = 150 kΩ
8M2 = 8.2 MΩ
PACKAGING
CODE PIECES DESCRIPTION MODEL/SIZE
A1 1000 Bandolier in ammopack straight leads 52 mm
VR37
R5 5000 Bandolier on reel straight leads 52 mm
www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28733
184 Revision: 20-Sep-07
VR37
Vishay BCcomponents High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors
DIMENSIONS
MARKING
The nominal resistance and tolerance are marked on the
resistor using four or five colored bands in accordance with
IEC publication 60062 “Color codes for fixed resistors”.
Yellow and grey are used instead of gold and silver because
metal particles in the lacquer could affect high-voltage
properties.
OUTLINES
The length of the body (L1) is measured by inserting the
leads into holes of two identical gauge plates and moving
these plates parallel to each other until the resistor body is
clamped without deformation (“IEC publication 60294”).
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the E96/E24/E12 series for resistors with a tolerance of ± 1 % or 5 %. The
values of the E96/E24 series are in accordance with “IEC publication 60063”.
Notes:
(1) The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
• The maximum permissible hot-spot temperature is 155 °C.
Ø D
L
1
L
2
Ø d
Outline
DIMENSIONS - resistor type and relevant physical dimensions
TYPE Ø D
MAX.
L1
MAX.
L2
MAX. Ø d
VR37 4.0 9.0 10.0 0.7 ± 0.03
MASS PER 100 UNITS
TYPE MASS
(g)
VR37 45.7
LIMITING VALUES
TYPE
LIMITING VOLTAGE (1)
(V) LIMITING POWER
(W)
DC RMS
VR37 3500 2500 0.5
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Revision: 20-Sep-07 185
VR37
High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors Vishay BCcomponents
The power that the resistor can dissipate depends on the operating
temperature.
Derating
Application Information
Pulse Loading Capability
70 100 50
0
0
50
100
155
- 55
T
a
m
b
( °C)
P
max
(%
P
rated
)
Maximum dissipation (Pmax) in percentage of rated power
as a function of the ambient temperature (Tamb)
0 0.4 1.2
0 0.8
20
40
60
80
P
(W )
∆
T
(K)
Hot-spot temperature rise (ΔT) as a function of dissipated power
4
6
8
10
10
2
20
10
-2
10 1
R
n
(MΩ)
V
max
(kV)
^
10
-2
Maximum allowed peak pulse voltage in accordance with
“IEC 60065 chapter 14.1”; 50 discharges from a 1 nF capacitor
charged to ; 12 discharges/minute (drift ΔR/R ≤2 %)Vmax
0 0.4 1.2
0 0.8
10
20
30
40
50
P
(W )
5 mm
10 mm
15 mm
∆
T
(K)
Temperature rise (ΔT) at the lead end (soldering
point) as a function of dissipated power at various
lead lengths after mounting
www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28733
186 Revision: 20-Sep-07
VR37
Vishay BCcomponents High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with
the schedule of “IEC publication 60115-1”, category
LCT/UCT/56 (rated temperature range: Lower Category
Temperature, Upper Category Temperature; damp heat,
long term, 56 days). The testing also covers the
requirements specified by EIA and EIAJ.
The tests are carried out in accordance with IEC publication
60068-2, “Recommended basic climatic and mechanical
robustness testing procedure for electronic components” and
under standard atmospheric conditions according to
“IEC 60068-1”, subclause 5.3.
In the Test Procedures and Requirements table the tests
and requirements are listed with reference to the relevant
clauses of “IEC publications 60115-1 and 60068-2”; a short
description of the test procedure is also given. In some
instances deviations from the IEC recommendations were
necessary for our method of specifying.
All soldering tests are performed with mildly activated flux.
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
4.16 21 (U) robustness of terminations:
4.16.2 21 (Ua1) tensile all samples Ø 0.7 mm; load 10 N; 10 seconds number of failures < 10 x 10-6
4.16.3 21 (Ub) bending half number
of samples Ø 0.7 mm; load 5 N; 4 x 90°number of failures < 10 x 10-6
4.16.4 21 (Uc) torsion other half
of samples 3 x 360° in opposite directions no damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.17 20 (Ta) solderability 2 seconds; 235 °C good tinning; no damage
4.18 20 (Tb) resistance to
soldering heat
thermal shock: 3 seconds; 350 °C;
3 mm from body ΔR max.: ± (0.5 % R + 0.05 Ω)
4.19 14 (Na) rapid change of temperature 30 minutes at - 55 °C and
30 minutes at + 155 °C; 5 cycles ΔR max.: ± (0.5 % R + 0.05 Ω)
4.20 29 (Eb) bump 3 x 1500 bumps in 3 directions; 40 g no damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.22 6 (Fc) vibration
frequency 10 to 500 Hz; displacement
1.5 mm or acceleration 10 g; 3 directions;
total 6 hours (3 x 2 hours)
no damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.23 climatic sequence:
4.23.2 2 (Ba) dry heat 16 hours; 155 °C
4.23.3 30 (Db) damp heat (accelerated) 1st
cycle 24 hours; 55 °C; 90 to 100 % RH
4.23.4 1 (Aa) cold 2 hours; - 55 °C
4.23.5 13 (M) low air pressure 2 hours; 8.5 kPa; 15 to 35 °C
4.23.6 30 (Db) damp heat (accelerated)
remaining cycles 5days; 55°C; 95 to 100 % RH Rins min.: 103MΩ
ΔR max.: ± (1.5 % R + 0.1 Ω)
Document Number: 28733 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com
Revision: 20-Sep-07 187
VR37
High Ohmic (up to 33 MΩ)/
High Voltage (up to 3.5 kV) Resistors Vishay BCcomponents
4.24.2 3 (Ca) damp heat
(steady state)
56 days; 40 °C; 90 to 95 % RH;
dissipation 0.01 Pn;
limiting voltage 100 V (DC)
ΔR max.: ± (1.5 % R + 0.1 Ω)
4.25.1 endurance 1000 hours at 70 °C; Pn or Vmax ΔR max.: ± (1.5 % R + 0.1 Ω)
4.8.4 temperature coefficient between - 55 °C and + 155 °C
(TC x 10-6/K) ≤ ± 200
4.7 voltage proof on insulation 700 VRMS during 1 minute;
V-block method no breakdown
4.12 noise “IEC publication 60195” max. 2.5 µV/V
4.6.1.1 insulation resistance 500 V (DC) during 1 minute; V-block
method Rins min.: 104MΩ
4.13 short time overload
room temperature;
dissipation 6.25 x Pn (voltage not more
than 2 x limiting voltage); 10 cycles;
5 seconds ON and 45 seconds OFF
ΔR max.: ± (2.0 % R + 0.05 Ω)
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
