It is well known, that excessive voltages and the resulting surge currents can damage or even destroy communications equipment, data transmission and energy supply systems. Injury to human beings cannot always be excluded either. Such excessive voltages may be due to a number of factors. They include:

• Atmospheric fields and discharges (thunderstorms)
• Inductive coupling from power supply lines, e.g. triggered by switching processes
• Direct contact between communications and power supply lines
• Electrostatic discharges
Gas-filled surge arresters offer optimal protection in these cases. They limit surge voltages quickly and safely to uncritical values and reliably discharge any dangerous currents that may occur.

Epcos manufacturing plants supply an extensive range of surge arresters, meeting the most diverse requirements of our customers. Thanks to international business operations, the company has developed a significant advance in the sector of overvoltage protection.

Gas-filled surge arresters operate on the gas-physical principle of the highly effective arc discharge. Electrically, surge arresters act as voltage-dependent switches. As soon as the voltage applied to the arrester exceeds the spark-over voltage, an arc is formed in the hermetically sealed discharge region within nanoseconds. The high surge current handling capability and the arc voltage, which is almost independend of the current, short-circuit the overvoltage. When the discharge has died down, the arrester extinguishes and the internal resistance immediately returns to values of several 100 MΩ.

Key characteristics:
• DC spark-over voltage...70 ... 5500 V
• Impulse discharge current (8/20 µs)...max. 100 кА
• Impulse discharge current (10/350 µs)...max. 100 кА
• Alternating discharge current (1 s)...max. 20 А
• Alternating discharge current (0,2 s)...max. 300 А
• Arc voltage...10...35V
• Insulation resistance...min. 1GΩ
• Capacitance...min. 0.2pF
• Breakdown voltage 70...6000V

EPCOS arresters

SMD arresters

Epcos produces a special series of miniature gas arresters(SMD). The components are characterised by low capacitance and large resistance of isolation. The main application: the protection from overvoltage in telecommunications, modems, electronic schemes, antennas and others. Series S20/S30, S50, S80 are included to the group of 2-electrode components, Series TG30 are 3-electrode arresters.



Detailed information
Type	Size, mm	UnominalDC spark-overvoltage, V	Inominalalternating discharge current (50 Hz, 1s), А	Inominalimpulse discharge current 10 operation 8/20 μs, А	С ,pF	Ordering code	Detailed information
S20 Series
S20-A200X S20-A470X	3.2mm×1.6mm×1.6mm	200 470	-	0.5	<1	B88069X 9731T303 B88069X 1193T303
Series S30
S30-А90X	4.5mm×3.2mm×2.7mm	90	2	2	<1	B88069X 1023T203
S30-А150X	4.5mm×3.2mm×2.7mm	150	2	2	<1	B88069X 6071T203
S30-А230X	4.5mm×3.2mm×2.7mm	230	2	2	<1	B88069X 5941T203
S30-А230XS	4.5mm×3.2mm×2.7mm	230	2	2	<1	B88069X 9801T203
S30-А300X	4.5mm×3.2mm×2.7mm	300	2	2	<1	B88069X 6891T203
S30-А350X	4.5mm×3.2mm×2.7mm	350	2	2	<1	B88069X8361T203
S30-А400X	4.5mm×3.2mm×2.7mm	400	2	2	<1	B88069X5211T203
S30-А420XS	4.5mm×3.2mm×2.7mm	420	-	2	<1	B88069X 6311T203
S50 Series
S50-A90X S50-A230X	5mm×5mm×5.7mm	90 230	5	5	<1	B88069X1913T902 B88069X1923T902
S80 Series
S80-A75X	8.4mm×8.4mm×6mm	75	20	20	<1.5	B88069X 1933T602
S80-A90X	8.4mm×8.4mm×6mm	90	20	20	<1.5	B88069X 1673T602
S80-A230X	8.4mm×8.4mm×6mm	230	20	20	<1.5	B88069X 1943T602
TG30 Series
TG30-A90XSMD	3.5mm×6.8mm	90	2	2	<1	B88069X9991T203
Epcos arresters: EM and EHV series
The series of gas arresters represent leaded components applied in telecommunication customer's line, modems. The main advantages of such components are large current-carrying capacity, high isolation resistivity, which make them key components in the equipment operating at high voltage values. EM Series are suitable for operating at 2,5 кА ( impulse discharging current )/2,5 А (discharging current at 50Hz, 1s). Sizes:∅ 5,5×6 mm. EHV series working characteristics: 3 кА (импульсный разрядный ток)/ -. Размеры:∅ 6×7 mm.
EM Series
EM Series
Тип	EM90X	EM230X	EM300X	EM300XS	EM350X	EM400X	EM1000X	EM2000X
Ordering code	B88069X 0190S102	B88069X 0900S102	B88069X 0800S102 B88069X 0800T502	B88069X 1780S102	B88069X 0590S102 B88069X 0980T502	B88069X 0200S102	B88069X 4651S102	B88069X 5600S102
UnominalDC spark-over voltage, V	90	230	300	300	350	400	1000	2000
Impulse spark-over voltage 100 В/µs typical values/99% of measured value	330/400	600/650	600/700	450/500	700/800	750/800	1600/1700	3200/3400
Capacitance at 1 MHz, ≤ 1pF
Detailed information
EHV Series
EHV Series
Тип	EHV62-H25	EHV62-H36	EHV62-H45
ordering code	B88069X 1893…	B88069X 1683…	B88069X X1793...
Unom DC spark-over voltage, V	2500	3600	4500
Impulse spark-over voltage 100 V/µs typical/99% of measured values	3000/3300	4150/4350	4800/5200
Capacitance at 1 MHz ≤1pF
Detailed information
M Series
Compact 2-electrode arresters М Series produced by Epcos are widely used in telecommunicatios. Produced items are suitable for operating at 5 кА (impulse discharge current)/5 А (discharge current at 50Hz, 1s). Sizes:∅ 5×5 mm.





Detailed information
Type	M50-C90X	M50-A230X	M50-A350X	M51-C90X	M51-A350X	M51-A600X	M51-A75X
Ordering code	B88069X 1590C253	B88069X 4600C253	B88069X 4630C253	B88069X 5010C102	B88069X 4640C102	B88069X 4590C102	B88069X 6131C102
UnominalDC spark-over, V	90	230	350	90	350	600	75
Impulse spark-over voltage 100 V/µs typical/99% of measured values, V	330/400	600/650	600/700	450/500	700/800	1200/1350	300/350
Capacitance at 1 MHz, ≤ 1pF
Detailed information
Light-duty EC Series
ЕС Series of 2-electrode arresters produced by Epcos represent a great interest for using in telecommunications. Produced light-duty components Выпускаемые маломощные компоненты рассчитаны для работы при 5 кА (импульсный разрядный ток)/5 А (discharge current at 50Hz, 1s). Sizes:∅ 8×6 mm.



Detailed information
Type	EC75X	EC90X	EC150X	EC230X	EC350X	EC600X
Ordering code	B88069X 0180S102	B88069X 0720S102	B88069X 0880S102	B88069X 0660S102	B88069X 0810S102	B88069X 0780S102
Unominal DC spark-overvoltage, V	75	90	150	230	350	600
Impulse spark-over voltage 100 V/µs typical/99% of measured values, V	400/500	450/500	450/500	500/550	700/800	1000/1250
Capacitance at 1MHz ≤ 1pF
Detailed information
2-electrode arresters (medium-duty types)
Epcos сreated Series N80...81 medium-duty types. 2-electrode components can be produced both with leads and without leads. (gas-filled arresters are suitable for operating at 10 kA (impulse discharge current)/10 А (discharge current at 50Hz, 1s). Sizes:∅ 8×6 mm. Such components are widely applied in telecommunications, telephones, transmission equipment.



Detailed information
Type	N80-C90X	N81-A90X	N80-A230X	N81-A230X	N80-A350X	N81-A350X	N81-A500X	N80-A600X	N81-A600X
Ordering code	B88069X 4890C103	B88069X 4880S102	B88069X 4900C103	B88069X 4930S102	B88069X 4910C103	B88069X 4920S102	B88069X 4860T502	B88069X 4990C103	B88069X 2830S102
UnominalDC spark-over, V	90	90	230	230	350	350	500	600	600
Impulse spark-over voltage 100 V/µs typical/99% of measured value, V	450/500	450/500	450/500	450/500	650/700	650/700	750/900	950/1100	950/1100
Capacitance at 1 MHz, ≤ 1.5 pF
Detailed information
Gas-filled high-duty arresters
Series of high-duty arresters A80...A81 produced by Epcos are characterised by a high discharge current-carrying capacity, low capacity and large isolation resistance, that provides a perfect protection fron the overvoltage in telecommunications. Variants of technical performance of components are possible: leaded, without leads. the components are suitable for operating at 20 kA. (impulse discharge current)/20 А (discharge current at 50Hz, 1s). Sizes:∅ 8×6 mm.



Detailed information
Type	A81-A75X	A80-C90X	A81-C90X	A80-A230X	A81-A230X	A80-A250X	A81-A250X	A80-A350X	A81-A350X	A80-A600X	A81-A600X
Ordering code	B88069X 3881S102 B88069X 3881T502	B88069X 1410C103	B88069X 1380S102	B88069X 2240C103	B88069X 2250S102	B88069X 2920C103	B88069X 1500S102	B88069X 2230C103	B88069X 2380S102	B88069X 2900C103	B88069X 2880S102
Unominal spark-over voltage, V	75	90	90	230	230	250	250	350	350	600	600
Impulse spark-over voltage 100 V/µs typical/99%, V	300/350	450/500	450/500	450/500	450/500	500/550	500/550	650/700	650/700	950/1100	950/1100
Capacitance, ≤1.5 pF
Detailed information
Heavy-duty arresters: A71 Series
Leaded Series of Epcos arresters А71 were developed especially for application in highvoltage devices. In oder to avoid overvoltage and short-circuit which can be caused by voltage jumps in the line and also by equipment's breakdown.The perfect isolation when arresters producing is being provided. Arresters are suitable for operating at 10 kA (impulse discharge current)/10 А (discharge current at 50Hz, 1s). Sizes:∅ 8×8mm.
Detailed information
Тип	A71-H08X	A71-H10X	A71-H14X	A71-H16X	A71-H25X	A71-H35X	A71-H45X	A71-H55X
Ordering code	B88069X 2140S102	B88069X 3820S102	B88069X 2180S102	B88069X 2610S102	B88069X 2190S102	B88069X 2200S102	B88069X 2590S102	B88069X 2620S102
UnominalDC spark-over, V	800	1000	1400	1600	2500	3500	4500	5500
Impulse spark-over voltage 100 V/µs typical/99%, В	1000/1100	1200/1300	2000/2100	2200/2300	3800/3900	4800/4900	5700/5800	6000/6500
Capacitance, ≤1.5 pF
Detailed information
3-electrode medium-duty arresters T30...T33, T80...T83 Series
Series of 3-tri-electrode medium-duty Epcos arresters is developed for application in lines and modems. Thanks to additional third operating electrode it is possible to provide a reliable protection from overvoltage in electrical grids. It is also possible to produce arresters both with and without leads and smd series. Arresters are suitable for operating at 10 кА (impulse discharge current)/10 А (discharge current at 50Hz,1s). Sizes:∅ 6×8 mm.







Т30..Т33 Series
Тип

Т30-А90X

Т31-А90X

Т33-А90X

T30-A230X

T31-A230X

T33-A230X

T33-A230XF1

T30-A250X

T30-A350X

T31-A350X

T33-A350X

TT33-A350X8F1

T30-A420X

T30-A500X

Ordering code

B88069X 3030C253

B88069X 2261B252

B88069X 2271B502

B88069X 3060C253

B88069X 3130B252

B88069X 9800B502

B88069X 9550B502

B88069X 3951C253

B88069X 3180C253

B88069X 3090B252

B88069X 1470B502

B88069X 9921B502

B88069X 3040C253

B88069X 3070C253

UnominalDC-spark overvoltage, V

90

90

90

90

230

230

230

230

250

350

350

350

420

500

Impulse voltage 100 V/µs typical/99%, V

350/450

350/450

350/450

350/450

350/400

350/400

350/400

350/400

400/500

650/800

650/800

650/800

700/850

900/1100

Capacitance, ≤1.5 pF

Detailed information
Series Т80...Т83
Тип	T80-A90X	T81-A90X	T83-A90X	T81-A150X	T83-A150X	T80-A230X	T81-A230X	T83-A230X	T83-A250X
Ordering code	B88069X 8360C203	B88069X 8440B252	B88069X 8300B502	B88069X 9580B252	B88069X 9590B502	B88069X 9380C203	B88069X 8470B252	B88069X 8910B502	B88069X 8340B502
Uном пробоя, В	90	90	90	150	150	230	230	230	250
Impulse spark-over voltage 100 V/µs typical/99%, V	300/400	300/400	300/400	400/450	400/450	400/450	400/450	400/450	400/450
Capacitance 1пФ
Detailed information
Additional information
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