LDTS14 thru LDTS48A
HEAVY DUTY (LOAD DUMP) TRANSIENT
VOLTAGE SUPPRESSOR
S C O T T S D A L E D I V I S I O N
DESCRIPTION
APPEARANCE
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.
TO-3
(TO-204AD)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
•
•
•
•
•
•
•
Unidirectional TVS series for DC power applications
Low Clamping ratio
Working voltage (VWM) range of 14 volts to 48 volts
Hermetically sealed TO-3 package
Low thermal resistance
•
•
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
Dissipates heat from prolonged transients
power system.
Consult factory for other package options including
•
LDTS 48 Series – Designed for a standard 24 volt
power system capable of sustaining a 48 volt
(double voltage) jump start.
surface mount
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
•
•
3000 Watts of Peak Pulse Power dissipation at 50 ms
•
•
CASE: Industry standard TO-3 (TO-204AD)
(see Figure 1)
hermetically sealed, .052 inch diameter pins.
t
clamping (0 volts to V(BR) min.): Less than 100 pico
FINISH: All external surfaces are corrosion
resistant and terminals solderable.
POLARITY: Standard polarity anode to case.
WEIGHT: 15 grams (approx.).
seconds (theoretical)
•
•
•
•
•
•
Storage temperature: -50oC to +200oC
Operating temperature: -50oC to 175oC (Figure 3)
Forward surge rating: 200 amps, 8.3ms at 25oC
Steady state power dissipation: 50 watts, TC = 25oC
Thermal resistance: Less than 1oC/W
Repetition Rate (duty cycle): 0.1%
•
•
•
MOUNTING HARDWARE: Consult factory for
optional insulator and sheet metal screws
•
See package dimensions on last page
ELECTRICAL CHARACTERISTICS
MINIMUM
MAXIMUM
CLAMPING
VOLTAGE
@ IPP
MAXIMUM
SURGE
CURRENT
(FIG. 2)
@ IPP
MAXIMUM
REVERSE
CURRENT
@ VWM
ID
MAXIMUM
VOLTAGE
TEMP.
VARIATION
VBR
REVERSE
STANDOFF
VOLTAGE
VWM
BREAKDOWN
VOLTAGE
V(BR)
MICROSEMI
PART
@ 20mA
VOLTS
16.0
VC
NUMBER
LDTS 14
LDTS 14A
LDTS 24
LDTS 24A
LDTS 30
LDTS 30A
LDTS 48
LDTS 48A
VOLTS
14.0
VOLTS
26.0
AMPS
115.5
µA
mV/C
19.0
100.0
14.0
16.0
23.5
128.0
100.0
17.0
24.0
26.5
43.0
70.0
100.0
31.0
24.0
26.5
39.0
77.0
100.0
29.0
30.0
33.0
54.0
56.0
100.0
39.0
30.0
33.0
48.5
62.0
100.0
36.0
48.0
53.0
86.0
34.0
100.0
55.0
48.0
53.0
78.0
38.0
100.0
50.0
Copyright 2003
11-12-03 REV A
Microsemi
Page 1
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503