Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page 1
Copyright 2001
Rev. 0.02, 2001-05-15
WWW.Microsemi .COM
1N4938, 1N4938-1, LL4938
Silicon Switching Diode
P
RODUCT
P
REVIEW
WATERTOWN DIVISION
DESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
These silicon switching diodes are
available in DO-35 glass packages and
LL4938 Mini-Melf (DO-213AA).
These devices are used in general-
purpose applications where high voltage
and switching speed are important.
When ordering Mil-PRF-19500/169
parts, use the number with the
appropriate 1N4938-1 JAN, JTX or
JTXV prefix.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
1N4938 LL4938
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
Rating Symbol Value Unit
Peak Inverse Voltage@ 100µA PIV 200(Min.) Volts
Average Rectified Current IA vg 100 mAmps
Continuous Forward Current IF dc 100 mAmps
Peak Surge Current
(t peak = 1 µsec.) I peak 1.0 Amp
Power Dissipation T L =50°C,
L = 3/8” from body P tot 500 mWatts
Storage Temperature Range TS t -65 to +200 ºC
Operating Temperature TOp -65 to +175 ºC
KEY FEATURES
KEY FEATURES KEY FEATURES
KEY FEATURES
metallurgical bonded.
available up to JANTXV for
1N4938-1 axial devices &
1N4938UR-1 MINI-MELF.
APPLIC
APPLICAPPLIC
APPLICATIONS/BENEFITS
ATIONS/BENEFITSATIONS/BENEFITS
ATIONS/BENEFITS
High Voltage and Switching
Speed.
1
1N
N4
49
93
38
8,
, 1
1N
N4
49
93
38
8-
-1
1,
, L
LL
L4
49
93
38
8
Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page 2
Copyright 2001
Rev. 0.02, 2001-05-15
WWW.Microsemi .COM
1N4938, 1N4938-1, LL4938
Silicon Switching Diode
P
RODUCT
P
REVIEW
WATERTOWN DIVISION
ELECTRICAL PARAMETERS @ 25°C (unless otherwise specified)
Parameter Symbol Conditions Min Max Units
Forward Voltage Drop VF 1
F =100mA 1.0 V
Reverse Leakage Current
@150°C IR VR = 175 V 100 µA
Reverse Leakage Current IR VR = 175 V 100 nA
Capacitance CT V
R = 0 V, F = 1 MHZ 5.0 PF
Reverse Recovery Time Trr (See note 1) 50 ns
Note 1: Per Method 4031-B with IF = IR = 30 ma, RL = 100 Ohms, C = 3 Pf
PRODUCT PRELIMINARY DATA – Information contained in this document is pre-production
data, and is proprietary to Microsemi Corp. It may not be modified in any way without the express
written consent of Microsemi Corp. Product referred to herein is not guaranteed to achieve
preliminary or production status and product specifications, configurations, and availability may
change at any time.
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
L
Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page
3
Copyright 2001
Rev. 0.02, 2001-05-15
WWW.Microsemi .COM
1N4938, 1N4938-1, LL4938
Silicon Switching Diode
P
RODUCT
P
REVIEW
WATERTOWN DIVISION
1N4938 DO-35 Glass Package
(nominal dimensions)
LL4938 LL-34/35 MINI-MELF
SMD Package (DO-213AA)
(nominal dimensions)
D
DA
AT
TA
A
P
PA
AC
CK
KA
AG
GE
E
Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page
4
Copyright 2001
Rev. 0.02, 2001-05-15
WWW.Microsemi .COM
1N4938, 1N4938-1, LL4938
Silicon Switching Diode
P
RODUCT
P
REVIEW
WATERTOWN DIVISION
NOTES:
N
NO
OT
TE
ES
S
