LDTS14_1 Datasheet, PDF (1/2 Pages) Microsemi Corporation – HEAVY DUTY (LOAD DUMP) TRANSIENT VOLTAGE SUPPRESSOR

SCOTTSDALE DIVISION
LDTS14 thru LDTS48A
HEAVY DUTY (LOAD DUMP) TRANSIENT
VOLTAGE SUPPRESSOR
DESCRIPTION
This LDTS series is used in automotive and vehicular applications where
further protection may be required for load-dump and field-decay transients.
This type of protection is needed when the battery is disconnected while
the engine and alternator are still operating. This produces prolonged
severe transients requiring additional transient voltage suppressor design
considerations beyond those ratings specified for other conventional TVS
components.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
APPEARANCE
TO-3
(TO-204AD)
FEATURES
• Unidirectional TVS series for DC power applications
• Low Clamping ratio
• Working voltage (V_WM) range of 14 volts to 48 volts
• Hermetically sealed TO-3 package
• Low thermal resistance
• Dissipates heat from prolonged transients
• Consult factory for other package options including
surface mount
MAXIMUM RATINGS
• 3000 Watts of Peak Pulse Power dissipation at 50 ms
(see Figure 1)
• t_clamping (0 volts to V_(BR) min.): Less than 100 pico
seconds (theoretical)
• Storage temperature: -50^oC to +200^oC
• Operating temperature: -50^oC to 175^oC (Figure 3)
• Forward surge rating: 200 amps, 8.3ms at 25^oC
• Steady state power dissipation: 50 watts, T_C = 25^oC
• Thermal resistance: Less than 1^oC/W
• Repetition Rate (duty cycle): 0.1%
APPLICATIONS / BENEFITS
• LDTS 14 Series – Designed for a standard 12 volt
power system.
• LDTS 24 Series – Designed for a standard 12 volt
power system capable of sustaining a 24 volt
(double voltage) jump start.
• LDTS 30 Series – Designed for a standard 24 volt
power system.
• LDTS 48 Series – Designed for a standard 24 volt
power system capable of sustaining a 48 volt
(double voltage) jump start.
MECHANICAL AND PACKAGING
• CASE: Industry standard TO-3 (TO-204AD)
hermetically sealed, .052 inch diameter pins.
• FINISH: All external surfaces are corrosion
resistant and terminals solderable.
• POLARITY: Standard polarity anode to case.
• WEIGHT: 15 grams (approx.).
• MOUNTING HARDWARE: Consult factory for
optional insulator and sheet metal screws
• See package dimensions on last page
ELECTRICAL CHARACTERISTICS
MICROSEMI
PART
NUMBER
LDTS 14
LDTS 14A
LDTS 24
LDTS 24A
LDTS 30
LDTS 30A
LDTS 48
LDTS 48A
REVERSE
STANDOFF
VOLTAGE
V_WM
VOLTS
14.0
14.0
24.0
24.0
30.0
30.0
48.0
48.0
MINIMUM
BREAKDOWN
VOLTAGE
V_(BR)
@ 20mA
VOLTS
16.0
16.0
26.5
26.5
33.0
33.0
53.0
53.0
MAXIMUM
CLAMPING
VOLTAGE
@ I_PP
V_C
VOLTS
26.0
23.5
43.0
39.0
54.0
48.5
86.0
78.0
MAXIMUM
SURGE
CURRENT
(FIG. 2)
@ I_PP
AMPS
115.5
128.0
70.0
77.0
56.0
62.0
34.0
38.0
MAXIMUM
REVERSE
CURRENT
@ V_WM
I_D
µA
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
MAXIMUM
VOLTAGE
TEMP.
VARIATION
V_BR
mV/C
19.0
17.0
31.0
29.0
39.0
36.0
55.0
50.0
Copyright  2003
11-12-03 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, [phone], Fax: [phone]
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