Littelfuse Sxx25x Series Bedienungsanleitung PDF herunterladen (Seite 5)

299

Revised: 09/23/13

Speciﬁcations are subject to change without notice.

Teccor

brand Thyristors

20 / 25 Amp Standard SCRs

Sxx20x & Sxx25x Series

Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current

100

120

0.0 0.5 1.

01.5

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

FREE AIR RATING

Sxx25L

Sxx25N

Sxx25R

Sxx20L

Average On-State Current [I

T(AVE)

] - Amps

Maximum Allowable Ambient

Temperature (T

) - ºC

Note: xx = voltage

Figure 10: Peak Capacitor Discharge Current Figure 11: Peak Capacitor Discharge Current Derating

1000

100

0.5 1.

0 10.0

50.0

Sxx20L

Sxx25L

Sxx25R

Sxx25N

Pulse Current Duration (t

) - ms

Peak Discharge Current (I

) - Amps

TRM

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0255075 100 12

5 150

Case Temperature (T

) - ºC

Normalized Peak Current

100

1000

1 10 100 1000

Sxx25L

Sxx25R

Sxx25N

Sxx20L

Peak Surge (Non-repetitive)On-state

Current (I

TSM

) – Amps

Surge Current Duration -- Full Cycles

Figure 12: Surge Peak On-State Current vs. Number of Cycles

SUPPLY FREQUENCY: 60 Hz Sinusoidal

LOAD: Resistive

RMS On-State Current: [I

T(RMS)

]: Maximum Rated

Value at Speciﬁed Case Temperature

Notes:

1. Gate control may be lost during and immediately

following surge current interval.

2. Overload may not be repeated until junction

temperature has returned to steady-state

rated value.

1 2 3 4 5 6 7 8 9

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