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BD437 BD437 is an NPN bipolar transistor with 45V collector-emitter voltage and 4A collector current, housed in a TO126 through-hole package.
Mfr Part #:

BD437

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
BD437 is an NPN bipolar transistor with 45V collector-emitter voltage and 4A collector current, housed in a TO126 through-hole package.
✓ Total Stock: 940 pcs
$ Price Range: $0.30 - $1.34

BD437 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Partservice ✓
Non-Authorised Inventory information
920 pcs
On Request
920 pcs On Request 1 On Request On Request On Request On Request On Request
Chanetech ✓
Non-Authorised Inventory information
20 pcs
On Request
20 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

BD437 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Frequency
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
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BD437 Description

Short technical summary and product information.

The BD437 is an NPN bipolar junction transistor designed for general purpose switching and amplification applications. It features a collector-emitter voltage rating of 45V and a continuous collector current of 4A, making it suitable for medium-power circuits.

 

With a power dissipation of 36W and a transition frequency of 3MHz, this transistor can handle moderate frequency switching tasks. The DC current gain (hFE) is minimum 85 at 500mA collector current and 1V Vce, ensuring reliable amplification. The collector-emitter saturation voltage is typically 800mV at 300mA base current and 3A collector current.

 

The BD437 is offered in a TO-225AA / TO-126-3 through-hole package, specifically the TO-126 supplier package. It operates over a junction temperature range of -55°C to 150°C. The component is compliant with RoHS3, REACH, and has an MSL of 1 (unlimited). Note: compliance data is unverified and should be confirmed.

BD437 Quick Information

Product Type: Bipolar (BJT) Transistor
Series: BD437
Canonical Name: BD437 NPN Bipolar Transistor
Subcategory: Single NPN Transistor

BD437 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BD437 Estimated Pricing

Qty Low High
1+ $1.34 $1.34
50+ $0.63 $0.63
100+ $0.56 $0.56
500+ $0.43 $0.43
1,000+ $0.39 $0.39
2,000+ $0.36 $0.36
5,000+ $0.32 $0.32
10,000+ $0.30 $0.30

Estimated market price range - modelled values for guidance only, not live distributor offers.

BD437 Features

  • NPN bipolar transistor for medium-power applications.
  • Rated for 45V collector-emitter voltage.
  • Can handle up to 4A collector current.
  • Power dissipation of 36W.
  • Through-hole TO126 package for easy mounting.

BD437 Applications

  • Used in power management circuits.
  • Suitable for motor control drivers.
  • Ideal for audio amplifier output stages.
  • Applicable in switching regulator designs.

BD437 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter voltage rating of the BD437?

45V.

What package does the BD437 come in?

TO-225AA / TO-126-3 (TO-126).

What is the operating temperature range of the BD437?

-55°C to 150°C (junction).

Is the BD437 RoHS compliant?

It is listed as RoHS3 compliant, but this information is unverified and should be confirmed.

What type of transistor is the BD437?

NPN bipolar junction transistor.

What is the maximum collector current of the BD437?

4A.

What is the DC current gain (hFE) of the BD437?

Minimum 85 at 500mA collector current and 1V Vce.

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