TCM1030, TCM1050 DUAL TRANSIENT-VOLTAGE SUPPRESSORS

SCTS040B - JUNE 1989 - REVISED JUNE 1997

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features

Meet or Exceed Bell Standard LSSGR Requirements
Externally-Controlled Negative Firing Voltage...-90 V Max
Accurately Controlled, Wide Negative Firing Voltage Range...-5 V to -85 V
Positive Surge Current (see Note 1):
TCM1030 TCM1050
10/1000 16 A 30 A
10/160 25 A 45 A
2/10 35 A 50 A
Negative Surge Current (see Note 1):
TCM1030 TCM1050
10/1000 -16 A -25 A
10/160 -25 A -29 A
2/10 -35 A -36 A
High Holding Current
- TCM1030...100 mA Min
- TCM1050...150 mA Min
  NOTE 1: The notation 10/1000 refers to a waveshape having t_r = 10 us and t_w = 1000 us ending at 50% of the peak value. The notation 10/160 is t_r = 10 us and t_w = 160 us. The notation 2/10 is t_r = 2 us and t_w = 10 us.

description

The TCM1030 and TCM1050 dual transient-voltage suppressors are designed specifically for telephone line card protection against lightning and transients (voltage transients) induced by ac lines. One of the TIP terminals (pin 1 or 8) and one of the RING terminals (pin 4 or 5) are connected to the tip and ring circuits of a SLIC (subscriber-line interface circuit). The battery feed connections between the SLIC and the subscriber line are from the remaining TIP (pin1 or 8) and RING (pin 4 or 5) through the TCM1030 or the TCM1050 to the tip and ring lines. Transients are suppressed between tip and ground, and ring and ground.

Positive transients are clamped by diodes D1 and D2. Negative transients that are more negative than V_S cause the SCRs, Q1 and Q2, to crowbar. The high holding current of the SCRs prevent dc latchup as the transient subsides.

The TCM1030 and TCM1050 are characterized for operation from -40°C to 85°C.

Title: DUAL TRANSIENT-VOLTAGE SUPPRESSORS
Product Family: SUBSCRIBER (TRANSIENT VOLTAGE SUPPRESSOR)
Device Functionality: DUAL TRANSIENT-VOLTAGE SUPPRESSORS
Orderable Devices: TCM1030D, TCM1030DR, TCM1030P, TCM1050D, TCM1050DR, TCM1050P

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View more information about generic part numbers:TCM1030, TCM1050

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