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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.
　

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

　

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

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

Test Item	Requirement	Procedure
Test Item	Requirement	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.

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

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