BSS138
Document number: DS35479 Rev. 4 - 2 1 of 8
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BSS138
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50V N-CHANNEL ENHANCEMENT MODE VERTICAL DMOS FET IN SOT23
Features and Benefits
• BVDSS > 50V
• R
DS(on) ≤ 3.5Ω @ VGS= 5V
• Maximum continuous drain current ID = 200mA
• “Lead Free”, RoHS Compliant (Note 1)
• Halogen and Antimony Free. "Green" Device (Note 2)
• Qualified to AEC-Q101 Standards for High Reliability
Mechanical Data
• Case: SOT-23
• Case Material: Molded Plastic, “Green” Molding Compound.
UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020
• Terminals: Matt Tin Finish; Solderable per MIL-STD-202,
Method 208
• Weight: 0.008 grams (approximate)
Ordering Information (Note 3)
Part Number Marking Reel size (inches) Tape width (mm) Quantity per reel
BSS138TA SS 7 8 3000
Notes: 1. No purposefully added lead
2. Diodes Inc's "Green" policy can be found on our website at http://www.diodes.com.
3. For packaging details, go to our website at http://www.diodes.com.
Marking Information
SOT-23
Device symbol Pin-Out
Top View
Top View
SS = Product Type Marking Code
D
S
G
BSS138
Document number: DS35479 Rev. 4 - 2 2 of 8
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Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Drain-Source Voltage VDSS 50 V
Gate-Source Voltage VGSS ±20 V
Continuous Drain Current ID 200 mA
Pulsed Drain Current (Note 5) IDM 800 mA
Thermal Characteristics @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Power Dissipation (Note 4) PD 350 mW
Thermal Resistance, Junction to Ambient (Note 4) RθJA 357 °C/W
Thermal Resistance, Junction to Leads (Note 6) RθJL 195 °C/W
Operating and Storage Temperature Range TJ, TSTG -55 to +150 °C
Notes: 4. For a device mounted on 25mm X 25mm X 1.6mm FR-4 PCV with high coverage of single sided 1oz copper, in still air condition.
5. Device mounted on minimum recommended pad layout test board, 10μs pulse duty cycle = 1%.
6. Thermal resistance from junctio n to solder-point (at the end of the collector lead).
BSS138
Document number: DS35479 Rev. 4 - 2 4 of 8
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Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic Symbol Min Typ Max Unit Test Condition
OFF CHARACTERISTICS
Drain-Source Breakdown Voltage BVDSS 50 - - V
VGS = 0V, ID = 0.25mA
Zero Gate Voltage Drain Current IDSS - -
0.5
5
100
µA
µA
nA
VDS = 50V, VGS = 0V
VDS = 50V, VGS = 0V, TA = 125°C
VDS = 20V, VGS = 0V
Gate-Source Leakage IGSS - - ±100 nA
VGS = ±20V, VDS = 0V
ON CHARACTERISTICS
Gate Threshold Voltage VGS
(
th
)
0.5 - 1.5 V
VDS = VGS, ID = 1mA
Static Drain-Source On-Resistance (Note 7) RDS
(
on
)
- - 3.5
Ω VGS = 5V, ID = 200mA
Forward Transconductance (Note 7 & 8) gfs 120 - - mS
VDS = 25V, ID = 200mA
DYNAMIC CHARACTERISTICS (Note 8)
Input Capacitance Ciss - - 50
pF VDS = 25V, VGS = 0V,
f = 1.0MHz
Output Capacitance Coss - - 25
pF
Reverse Transfer Capacitance Crss - - 8
pF
Turn-On Delay Time (Note 9) tD
(
on
)
- 10 - ns
VDD = 30V, ID = 280mA
Turn-On Rise Time (Note 9) t
r
- 10 - ns
Turn-Off Delay Time (Note 9) tD
(
off
)
- 15 - ns
Turn-Off Fall Time (Note 9) tf - 25 - ns
Notes: 7. Measured under pulsed conditions. Width = 300µs. Duty cycle ≤ 2%.
8. Sample test.
9. Switching times measured with 50Ω source impedance and <5ns rise time on a pulse generator.
BSS138
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Package Outline Dimensions
Suggested Pad Layout
SOT23
Dim Min Max Typ
A 0.37 0.51 0.40
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.903 1.10 1.00
K1 - - 0.400
L 0.45 0.61 0.55
M 0.085 0.18 0.11
α 0° 8° -
All Dimensions in mm
Dimensions Value (in mm)
Z 2.9
X 0.8
Y 0.9
C 2.0
E 1.35
A
M
JL
D
F
BC
H
K
G
K1
XE
Y
C
Z
BSS138
Document number: DS35479 Rev. 4 - 2 8 of 8
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IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Cus tomer or user of this document or prod ucts described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated p roducts for any unintended or una uthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign p atents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the e xpress
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their pro ducts and an y
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
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