Telecom/Datacom Surge Suppressors
SRA-64 Series

 


Description

The SRA64 Series surge suppressor is a single pair cube implementing three stage hybrid technology. This cube addresses over voltage transients with gas tubes and silicon avalanche components. In addition, sneak and fault currents are mitigated with resettable fuses (PTCs). The PTC's increase resistance several orders of magnitude when overcurrents exceed safe levels. A normal state resumes when overcurrents are removed. The ability to self restore in this manner significantly increases suppressor performance and survivability.

The standard SRA64 second stage clamps are placed from each signal line-to-ground. In certain cases, where ground potentials vary from site-to-site, a line-to-line only second stage clamp may be preferred. This variation is specified by a suffix "D" on the part number. In other cases, line-to-line and line-to-ground second stage clamps may be preferred. This variation uses an "X" suffix on the part number.

A variety of clamping voltages arc available as standard. Reference the ORDERING INFORMATION section to insure that a complete part number description is obtained.

 

Features & Benefits

bulletLightning Protection for Balanced Low Voltage Signal Lines
bulletMulti-Stage Protection
bulletSneak/Fault Current Protection
bulletDifferential Mode Protection
bulletCommon Mode Protection
bulletAutomatic Recovery
bulletFast Response Time
bulletFlame Retardant Epoxy Encapsulated

Specifications

Peak Surge Current . . . . . . . . . . . . . . .10kA (8 x 20µs)
Occurrences at 2000 Amps. . . . . . . . . . 100 typical
Response Time . . . . . . . . . . . . . . . . . .<1 nanosecond
Voltage Clamp . . . . . . . . . . . . . . . . . . 8, 15, 20, 30, 36, 43, 50, 60, or 200
Resistance (depending on model) . . .. . . 4.7 ohms - 15 ohms per line
Temperature . . . . . . . . . . . . . . . .  . . .-40oC to+85oC
Weight . . . . . . . . . . . . . . . . . . . .  . . .2.0 oz
Dimensions . . . . . . . . . . . . . . . . . . . . .1.15" Cube
Mounting Stud (standard) . . . . . . . . . . .No. 10x32x112'

ORDERING INFORMATION

SRA64C-XXX*
008=8 Volts
015=15 Volts
020=20 Volts
030=30 Volts
036=36 Volts
043=43 Volts
050=50 Volts
060=60 Volts
200=200 Volts

*No suffix=stage 2 clamp each line-to-ground
D suffix=stage 2 clamp line-to-line only
X suffix = state 2 clamp line-to-line and each line-to-ground

CAUTION: The hybrid design of this product includes series resistance. Do not place this product in service on any signal lines capable of supplying more than 150 milliamperes continuously.

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