Datasheets
MMBTA42 by:

500mA, 300V, NPN, Si, SMALL SIGNAL TRANSISTOR, MINIATURE, PLASTIC, SOT-23, 3 PIN

Part Details for MMBTA42 by STMicroelectronics

Results Overview of MMBTA42 by STMicroelectronics

Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.

Applications Consumer Electronics Audio and Video Systems

MMBTA42 Information

MMBTA42 by STMicroelectronics is a Small Signal Bipolar Transistor.
Small Signal Bipolar Transistors are under the broader part category of Transistors.

A transistor is a small semiconductor device used to amplify, control, or create electrical signals. When selecting a transistor, factors such as voltage, current rating, gain, and power dissipation must be considered, with common types. Read more about Transistors on our Transistors part category page.

Price & Stock for MMBTA42

Part # Distributor Description Stock Price Buy
DISTI # 70390352
RS MMBTA42 NPN High Voltage Bipolar Transistor, 0.5 A, 300 V, 3-Pin SOT-23 Min Qty: 50 Package Multiple: 1 Container: Bulk 0
  • 50 $0.0800
$0.0800 RFQ
Bristol Electronics   Min Qty: 75 300
  • 75 $0.0675
  • 224 $0.0450
$0.0450 / $0.0675 Buy Now
Quest Components TRANSISTOR,BJT,NPN,300V V(BR)CEO,500MA I(C),SOT-23 2350
  • 1 $0.3480
  • 37 $0.1566
  • 320 $0.1044
$0.1044 / $0.3480 Buy Now
Quest Components TRANSISTOR,BJT,NPN,300V V(BR)CEO,500MA I(C),SOT-23 240
  • 1 $0.0900
  • 57 $0.0600
$0.0600 / $0.0900 Buy Now
DISTI # MMBTA42
Avnet Silica Trans GP BJT NPN 300V 05A 3Pin SOT23 TR (Alt: MMBTA42) RoHS: Compliant Min Qty: 24000 Package Multiple: 3000 Lead time: 143 Weeks, 0 Days Silica - 0
Buy Now
DISTI # MMBTA42
EBV Elektronik Trans GP BJT NPN 300V 05A 3Pin SOT23 TR (Alt: MMBTA42) RoHS: Compliant Min Qty: 3000 Package Multiple: 3000 Lead time: 143 Weeks, 0 Days EBV - 0
Buy Now

Part Details for MMBTA42

MMBTA42 CAD Models

MMBTA42 Part Data Attributes

MMBTA42 STMicroelectronics
Buy Now Datasheet
Compare Parts:
MMBTA42 STMicroelectronics 500mA, 300V, NPN, Si, SMALL SIGNAL TRANSISTOR, MINIATURE, PLASTIC, SOT-23, 3 PIN
Pbfree Code Yes
Rohs Code Yes
Part Life Cycle Code Obsolete
Ihs Manufacturer STMICROELECTRONICS
Part Package Code SOT-23
Package Description 3 PIN
Pin Count 3
Reach Compliance Code compliant
ECCN Code EAR99
Samacsys Manufacturer STMicroelectronics
Collector Current-Max (IC) 0.5 A
Collector-Emitter Voltage-Max 300 V
Configuration SINGLE
DC Current Gain-Min (hFE) 40
JESD-30 Code R-PDSO-G3
JESD-609 Code e3
Moisture Sensitivity Level 1
Number of Elements 1
Number of Terminals 3
Operating Temperature-Max 150 °C
Package Body Material PLASTIC/EPOXY
Package Shape RECTANGULAR
Package Style SMALL OUTLINE
Peak Reflow Temperature (Cel) 260
Polarity/Channel Type NPN
Power Dissipation-Max (Abs) 0.35 W
Qualification Status Not Qualified
Surface Mount YES
Terminal Finish Matte Tin (Sn)
Terminal Form GULL WING
Terminal Position DUAL
Time@Peak Reflow Temperature-Max (s) 30
Transistor Application SWITCHING
Transistor Element Material SILICON
Transition Frequency-Nom (fT) 50 MHz

Alternate Parts for MMBTA42

This table gives cross-reference parts and alternative options found for MMBTA42. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of MMBTA42, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.

Part Number Manufacturer Composite Price Description Compare
MMBTA42 Texas Instruments Check for Price 500mA, 300V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-236AB MMBTA42 vs MMBTA42
SMBTA42 Infineon Technologies AG Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, ROHS COMPLIANT PACKAGE-3 MMBTA42 vs SMBTA42
MMBTA42 Galaxy Semi-Conductor Co Ltd Check for Price Transistor, MMBTA42 vs MMBTA42
PMBTA42 YAGEO Corporation Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, MMBTA42 vs PMBTA42
MMBTA42_R2_00001 PanJit Semiconductor Check for Price Small Signal Bipolar Transistor, MMBTA42 vs MMBTA42_R2_00001
Part Number Manufacturer Composite Price Description Compare
MMBTA42-7-F Diodes Incorporated $0.0419 Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, ROHS COMPLIANT, PLASTIC PACKAGE-3 MMBTA42 vs MMBTA42-7-F
MMBTA42S62Z Fairchild Semiconductor Corporation Check for Price Small Signal Bipolar Transistor, 0.2A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, MMBTA42 vs MMBTA42S62Z
MMBTA42LT1 Motorola Semiconductor Products Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-236AB, CASE 318-08, 3 PIN MMBTA42 vs MMBTA42LT1
MMBTA42 National Semiconductor Corporation Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, TO-236AB MMBTA42 vs MMBTA42
MMBTA42_NL Fairchild Semiconductor Corporation Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, SOT-23, 3 PIN MMBTA42 vs MMBTA42_NL
MMBTA42 Lite-On Semiconductor Corporation Check for Price Small Signal Bipolar Transistor, 0.3A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, GREEN, PLASTIC PACKAGE-3 MMBTA42 vs MMBTA42
MMBTA42-13 Diodes Incorporated Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, PLASTIC PACKAGE-3 MMBTA42 vs MMBTA42-13
FHTA42 Fenghua (HK) Electronics Ltd Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, SOT-23, 3 PIN MMBTA42 vs FHTA42
MMBTA42_R1_00001 PanJit Semiconductor Check for Price Small Signal Bipolar Transistor, MMBTA42 vs MMBTA42_R1_00001
MMBTA42T/R13 PanJit Semiconductor Check for Price Small Signal Bipolar Transistor, 0.5A I(C), 300V V(BR)CEO, 1-Element, NPN, Silicon, ROHS COMPLIANT, PLASTIC PACKAGE-3 MMBTA42 vs MMBTA42T/R13

MMBTA42 Related Parts

MMBTA42 Frequently Asked Questions (FAQ)

  • The MMBTA42 can operate safely between -55°C and 150°C, but the recommended operating temperature range is -40°C to 125°C.

  • To ensure proper biasing, the base-emitter voltage (VBE) should be between 0.6V and 0.8V, and the collector-emitter voltage (VCE) should be at least 1V higher than the base-emitter voltage.

  • The maximum collector current (IC) rating for the MMBTA42 is 500mA, and the maximum peak current rating is 1A.

  • To prevent electrostatic discharge (ESD) damage, handle the MMBTA42 by the body, avoid touching the pins, and use an anti-static wrist strap or mat when handling the device.

  • Yes, the MMBTA42 can be used in switching applications, but it's essential to ensure the transistor is properly biased and the switching frequency is within the recommended range (up to 100 kHz).

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