Mfr Part #:

BULB39D-1

Q: What are the switching times of the BULB39D-1?

Typical storage time is 0.7µs (max 1.5µs) and typical fall time is 50ns (max 100ns) under inductive load conditions.

Q: What is the power dissipation of the BULB39D-1?

The total power dissipation is 70W at case temperature 25°C.

The BULB39D-1 is an NPN power transistor from STMicroelectronics with a collector-emitter voltage of 450V and collector current of 4A. It is designed for high-voltage fast-switching applications such as electronic transformers for halogen lamps.

✓ Total Stock: 13,150 pcs

$ Price Range: $0.41

BULB39D-1 Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Hybrid Electronics ✓ Non-Authorised Inventory information	12,000 pcs On Request	12000 pcs	On Request	1	On Request	On Request	1128	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	1,150 pcs On Request	1150 pcs	On Request	1	On Request	On Request	13+	On Request	On Request

BULB39D-1 Description

Short technical summary and product information.

The BULB39D-1 is a high voltage fast-switching NPN power transistor manufactured using STMicroelectronics' Multi Epitaxial Planar technology. It is designed for use in electronic transformers for halogen lamps and switch mode power supplies. Key electrical characteristics include a collector-emitter voltage (VCEO) of 450V, collector current of 4A (peak 8A), and a DC current gain (hFE) of 10 minimum at 10mA. The transistor features very high switching speed with typical storage time of 0.7µs and fall time of 50ns. It is housed in a surface-mount D2PAK (TO-263) package and is available in tape and reel packaging (suffix T4). The device has a power dissipation of 70W at case temperature 25°C and a maximum junction temperature of 150°C.

BULB39D-1 Quick Information

Product Type: NPN Power Transistor

Series: BUL

Canonical Name: BULB39D-1 NPN Power Transistor

Subcategory: Single NPN

BULB39D-1 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 3

REACH Status: REACH Unaffected

BULB39D-1 Estimated Pricing

Qty	Low	High
2,000+	$0.41	$0.41

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

BULB39D-1 Features

High voltage NPN transistor rated 450V.
Collector current capability up to 4A.
Fast switching with 50ns fall time.
Surface-mount D2PAK package.
Internal diode for inductive load clamping.

BULB39D-1 Applications

Electronic transformers for halogen lamps.
Switch mode power supplies.
High-voltage fast-switching circuits.

BULB39D-1 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the collector-emitter voltage rating of the BULB39D-1?

The collector-emitter voltage (VCEO) is 450V, and the collector-emitter voltage with base shorted (VCES) is 850V.

What package is the BULB39D-1 available in?

The BULB39D-1 is available in a surface-mount D2PAK (TO-263) package.

What is the operating temperature range of the BULB39D-1?

The maximum junction temperature is 150°C, and the storage temperature range is -65°C to 150°C.

Is the BULB39D-1 RoHS compliant?

The BULB39D-1 is listed as RoHS3 Compliant, but this status is unverified.

What is the maximum collector current of the BULB39D-1?

The maximum collector current is 4A continuous, with a peak current of 8A (tp<5ms).

What are the switching times of the BULB39D-1?