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HIGH VOLTAGE
SURGE RESISTORS

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These resistors provide stable performance in adverse environmental conditions and during overload voltages.
A very wide resistance range is available.  Resistance marking adheres to IEC colour coding rules.
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GENERAL SPECIFICATIONS

Type SUR25 SUR37 SUR68
Rated Power at 70C 0.25W 0.5W 1W
Dimensions
[mm]
D max 2.5 3.5 5.5
L max 6.5 9.0 16
d+0.02, -0.05 0.58 0.7 0.8
H+-3 26mm 26mm 32mm
Maximum Working Voltage 350V 700V 1000V
Resistance Range 10R to 10KR Non-Inductive/10KR to 10MR Inductive
Resistance Tolerance +-5, +-10, +-20% +-5,+-10,+-15,+-20%
Safety Approvals UL, SA VDE VDE
Climactic Categories 55/155/56

CHARACTERISTICS

Test Item Requirement Procedure
SUR25 SUR37 SUR68
Insulation Resistance 10Mohm min. 350+-50VDC, 1min. 500+-50VDC, 1min. 700+-50VDC, 1min.
Temp. Coefficient +-1000PPM -55C 30min., +155C 30min.
Short Time Overload +-2.5% max. Rated Voltage X 2.5, 5 sec. on, 45sec. off 10 cycles
Thermal Shock +-2.0% max. -55C 30min., +155C 30min., 5 cycles
Moisture Resistance +-3.0% max. 40+-2C, 90-95%RH, 56 days, dissipation less than 0.01Pn
Overload +-5.0% max. Rated Voltage X 3.5, 5 sec.
Load Life +-8.0% max. 70+-3C, 0.5h. on, 0.5h. off, 1000+-12h., Pn or Vmax
Vibration +-1.0% max. 10-55Mz displacement, 1.5mm accel. 10g, X, Y, Z, 6hr.
Solderability 95% Coverage 2sec. 235+-5C flux 6000
Surge +-10% max. 8KV/10nF, Note1 8KV/10nF, Note2 Note3
Torque No Damage 2.5Kg f remains 5-10sec.

Note1:  2.5sec. on/off, 10 cycles
Note2:  2.5sec. on/off, 10 cycles
Note3:  R less than: 8KV/10nF; R greater than:  8KV/10nF 10 cycles

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HIGH VOLTAGE SURGE TEST

Ten discharges from a 10nF capacitor charged to Vmax:  12 discharges/min.
No evidence of flash over, mechanical damage, arcing or insulation breakdown.

ORDERING PROCEDURE EXAMPLE

SURA 242 12 XXX
Product
Code
Power Rating
241:  0.25W
242:  0.5W
243:  1W
Tolerance
14:  1%
13:  2%
12:  5%
11:  10%
Nominal Resistance

PACKING

Series Style Packing W H L Packing Unit
SUR25 Straight
Taping
Inner 78 98 270 5000
SUR37 73 71 260 1000
SUR68 83 71 260 750

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Tel:82-32-817-4325 Fax:82-32-817-4329

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