Supercapacitor Joule Thief
TRANS NPN 60V 1A TO-92
The BC637 is an NPN medium power transistor series. This article mainly introduces Circuit, Pinout, Datasheet and other detailed information about ON Semiconductor BC637.
BC637 NPN Transistor: Circuit, Pinout, and Datasheet
Elaine Beard |
27/04 |
BC637
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BC637 Description
The BC637 is an NPN medium power transistor series. The BC637 is housed in a TO-92 plastic case. The emitter, collector, and base leads emerge from the transistor from left to right when looking at the flat side with the leads oriented downward.
BC637 Pinout
The following figure is BC637 Pinout.
Pinout
BC637 CAD Model
The BC637 CAD Model is shown as follows.
Symbol
Footprint
3D Model
BC637 Features
• These are Pb−Free Devices*
• High current
• Two current gain selections
• High power dissipation capability
• Collector-Emitter Volt (Vceo): 60V
• Collector Current (Ic): 1.0A
• hfe: 40 @ 160mA
• Power Dissipation (Ptot): 625mW
• Current-Gain-Bandwidth (ftotal): 200MHz
• Type: NPN
Specifications
ON Semiconductor BC637 technical specifications, attributes, parameters and parts with similar specifications to ON Semiconductor BC637.
| Attribute | Value |
|---|---|
| Lifecycle Status | OBSOLETE (Last Updated: 1 week ago) |
| Mount | Through Hole |
| Mounting Type | Through Hole |
| Package / Case | TO-226-3, TO-92-3 (TO-226AA) |
| Number of Pins | 3 |
| Supplier Device Package | TO-92-3 |
| Weight | 201mg |
| Collector-Emitter Breakdown Voltage | 60V |
| Collector-Emitter Saturation Voltage | 500mV |
| Current-Collector (Ic) (Max) | 1A |
| Number of Elements | 1 |
| hFEMin | 40 |
| Operating Temperature | -55°C~150°C TJ |
| Packaging | Bulk |
| Published | 2002 |
| Part Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Termination | Through Hole |
| Max Operating Temperature | 150°C |
| Min Operating Temperature | -55°C |
| Voltage - Rated DC | 60V |
| Max Power Dissipation | 625mW |
| Current Rating | 1A |
| Frequency | 100MHz |
| Attribute | Value |
|---|---|
| Base Part Number | BC637 |
| Polarity | NPN |
| Element Configuration | Single |
| Power Dissipation | 1W |
| Power - Max | 625mW |
| Gain Bandwidth Product | 200MHz |
| Transistor Type | NPN |
| Collector Emitter Voltage (VCEO) | 60V |
| Max Collector Current | 1A |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 40 @ 150mA 2V |
| Current - Collector Cutoff (Max) | 100nA ICBO |
| Vce Saturation (Max) @ Ib, Ic | 500mV @ 50mA, 500mA |
| Voltage - Collector Emitter Breakdown (Max) | 60V |
| Max Breakdown Voltage | 60V |
| Frequency - Transition | 200MHz |
| Collector Base Voltage (VCBO) | 60V |
| Emitter Base Voltage (VEBO) | 5V |
| Height | 6.35mm |
| Length | 6.35mm |
| Width | 6.35mm |
| REACH SVHC | No SVHC |
| RoHS Status | Non-RoHS Compliant |
| Lead Free | Lead Free |
BC637 Marking Diagrams
The following figure is BC637 Marking Diagrams.
Marking Diagrams
BC637 Circuit
After you've winded your transformer as shown in the video at the beginning of the article, all you have to do now is connect the components with 5 solder joints according to the schematic. Change the value of the base resistor to suit your needs, as explained in the video.
Circuit
BC637 Alternatives
| Part Number | Description | Manufacturer |
| BC637TRANSISTORS | Transistor | Bytesonic Corporation |
| BC637ZL1TRANSISTORS | Small Signal Bipolar Transistor, 0.5A I(C), 60V V(BR)CEO, 1-Element, NPN, Silicon, TO-92 | Motorola Semiconductor Products |
| BC637RLRBTRANSISTORS | 500mA, 60V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 | Motorola Mobility LLC |
| BC637RLTRANSISTORS | 500mA, 60V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 | Motorola Mobility LLC |
| BC637RLRATRANSISTORS | 500mA, 60V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, TO-226AA, 3 PIN | onsemi |
| BC637/D26ZTRANSISTORS | 1500mA, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 | Texas Instruments |
| BC637/D27ZTRANSISTORS | 1500mA, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 | Texas Instruments |
BC637 Applications
■ Linear voltage regulators
■ Low-side switches
■ MOSFET drivers
■ Amplifiers
BC637 Package
The following figure is BC637 Package.
Package
BC637 Manufacturer
ON Semiconductor ( Nasdaq : ON) is a disruptive technology firm that is helping to build a brighter future. It was founded in 1999. With an emphasis on automotive and industrial end-markets, the firm is speeding change in megatrends like as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. Through a highly specialized and unique product range, Onsemi provides intelligent power and sensor solutions that address the world's most pressing concerns and pave the path for a safer, cleaner, and smarter world.
Datasheet PDF
Documents
Download datasheets and manufacturer documentation for
PCN Obsolescence/ EOL
Multiple Devices 30/Jun/2006ReachStatement
ON-Semiconductor-company-79.pdfDatasheets
BC635, 637, 639 BC635,7,9 BC637-ON-Semiconductor-datasheet-5395359.pdf BC637-ON-Semiconductor-datasheet-36805.pdf
Frequently Asked Questions
FAQ
What is current gain in NPN transistor?
The current in a bipolar NPN transistor is the ratio of these two currents ( Ic/Ib ), called the DC Current Gain of the device, and is given the symbol of having or nowadays Beta, ( β ).
Why NPN transistor is most widely used?
The flowing of these electrons from emitter to collector forms the current flow in the transistor. Generally, the NPN transistor is the most used type of bipolar transistor because the mobility of electrons is higher than the mobility of holes.
What is the BC637?
An NPN medium power transistor series.
What type of plastic case is the BC637 housed in?
TO-92 plastic case.