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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics STBV45-AP

Name: STBV45-AP
Brand: STMicroelectronics
SKU: STBV45-AP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STBV45-AP

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: STBV45-AP.pdf

Description:: TRANS NPN 400V 0.75A TO-92AP

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Inventory:3,925

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Product details

Overview

STBV45-AP from STMicroelectronics is a high-voltage fast-switching NPN power transistor in TO-92AP package, rated for V_CEO = 400 V, I_C = 0.75 A, and P_TOT = 0.95 W at T_c = 25 °C. It features low dynamic parameter spread, high switching speed (t_f = 0.3 µs), and cellular emitter planar structure optimized for compact fluorescent lamp (CFL) ballast circuits.

For engineers reviewing the STBV45-AP datasheet, STBV45-AP pinout, STBV45-AP application, or STBV45-AP equivalent, key selection criteria include V_CEO rating, R_thj-case = 131.6 °C/W thermal resistance, safe operating area under inductive load, saturation voltage at defined I_C/I_B, and halogen-free ECOPACK® compliance for ammopack shipment.

Technical Context

This device employs high-voltage multi-epitaxial planar technology with planar edge termination to simultaneously sustain wide RBSOA and achieve fast switching. Its cellular emitter design reduces minority carrier storage time, enabling t_f = 0.3 µs under standardized inductive load conditions (L = 3 mH, V_clamp = 300 V).

The STBV45-AP shares identical electrical characteristics with STBV45 but uses TO-92AP mechanical dimensions and ammopack tape-and-reel delivery. It exhibits h_FE = 12–30 across I_C = 0.5 mA to 0.4 A, and V_CE(sat) ≤ 0.5 V at I_C = 0.4 A / I_B = 135 mA - critical for low-loss CFL preheat and run-phase control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	400 V - maximum collector-emitter voltage with base open; defines safe blocking capability in CFL resonant tank circuits
I_C	0.75 A continuous - sets peak current handling for lamp ignition and steady-state operation
t_f	0.3 µs - measured fall time under inductive switching (L = 3 mH); enables >100 kHz operation in electronic ballasts
R_thj-case	131.6 °C/W - thermal resistance junction-to-case; determines heatsink requirement for 0.95 W dissipation at T_c = 25 °C
V_CE(sat)	0.4 V @ I_C = 0.3 A / I_B = 75 mA - low saturation voltage minimizes conduction loss during active switching
h_FE	12–30 - DC current gain range across operating points; supports stable base drive design for varying lamp impedance
ECOPACK®	Halogen-free molding compound - meets RoHS and JEDEC JESD97 environmental compliance for ammopack shipment

Pinout & Package

Package: TO-92AP - standardized 3-lead through-hole plastic package with ammopack tape-and-reel delivery (P0 = 12.70 mm pitch, W = 18.00 mm tape width, H = 19.50 mm reel height). Dimensions comply with ST's 0050910S mechanical drawing.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current sink terminal	Connected to ground or low-side return path in half-bridge CFL drivers; requires low-inductance layout
B (Base)	Control input	Receives current-limited drive (I_B ≤ 0.4 A) to saturate or cut off; sensitive to ESD per V_EBO = 9 V rating
C (Collector)	High-voltage output	Switches 400 V rail in resonant LC network; must withstand V_CES = 700 V transient spikes

Key Features

Feature	Design Value
Cellular emitter planar structure	Reduces minority carrier lifetime to achieve t_f = 0.3 µs without compromising RBSOA width
Planar edge termination	Enables reliable 400 V V_CEO operation while minimizing surface leakage and field crowding
Low lot-to-lot dynamic spread	Ensures consistent t_f, V_CE(sat), and h_FE across production batches for CFL mass production
TO-92AP ammopack format	Supports automated insertion in high-volume lighting assembly lines with standardized tape pitch and reel dimensions
Halogen-free ECOPACK®	Meets global environmental regulations without compromising mold compound thermal or mechanical performance

Applications

Compact Fluorescent Lamp (CFL) Ballasts

SMPS Battery Chargers

Use Scenario: High-frequency resonant inverter driving 11–23 W spiral CFL tubes during preheat, ignition, and run phases.

IC Role / Device Role / Timing Role: Main switching transistor in half-bridge topology; commutates at 30–70 kHz with controlled dV/dt to avoid acoustic noise.

Use Value: V_CEO = 400 V and t_f = 0.3 µs enable reliable lamp striking and stable run-phase current regulation without snubber losses.

Use Scenario: Primary-side switch in flyback converters for 5–12 V/1–2 A wall adapters powering portable electronics.

IC Role / Device Role / Timing Role: Power switch controlling energy transfer into transformer primary; duty cycle modulated by optocoupler feedback.

Use Value: Low V_CE(sat) ≤ 0.5 V and h_FE ≥ 12 reduce conduction loss and simplify base drive circuitry for cost-sensitive chargers.

Electronic Lighting Control Modules

DC-AC Inverters for Emergency Lighting

Use Scenario: Dimmable CFL driver with phase-cut or digital PWM dimming interface integrated into ceiling-mounted fixtures.

IC Role / Device Role / Timing Role: High-voltage switch synchronized to dimming signal; handles repeated turn-on at varying bus voltages.

Use Value: Wide RBSOA and minimum lot-to-lot parameter spread ensure consistent dimming linearity and flicker-free operation across production units.

Use Scenario: Standby-mode inverter converting 12 V battery to 230 V AC for emergency exit signs during grid failure.

IC Role / Device Role / Timing Role: Low-duty-cycle switching element activated only during outage; must survive long-term storage at elevated temperature.

Use Value: T_stg = –65 to 150 °C and T_J(max) = 150 °C support extended shelf life and reliable cold-start operation after prolonged standby.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage NPN switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BU2520DX	V_CEO = 1000 V, I_C = 2 A, TO-220FP package, higher P_TOT = 25 W	Designed for larger CFLs (>30 W) and TV horizontal deflection; requires heatsink	Select when higher voltage margin or power handling is required; not drop-in due to package and drive current differences
2SC5387	V_CEO = 400 V, I_C = 0.7 A, TO-92 package, h_FE = 10–20, no halogen-free marking	Similar CFL use case but lacks ECOPACK® compliance and tighter dynamic spread control	Acceptable for non-RoHS legacy designs where ammopack automation is not required

Compared with BU2520DX and 2SC5387, STBV45-AP delivers optimal balance of 400 V capability, 0.3 µs switching, TO-92AP automation compatibility, and halogen-free compliance - making it purpose-fit for mid-power CFL and charger production where footprint, consistency, and environmental compliance are jointly critical.

Availability

STBV45-AP is available at Aetrix Electronics and suitable for compact fluorescent lamp (CFL) ballasts, SMPS battery chargers, and electronic lighting control modules requiring stable component supply, consistent dynamic parameters, and RoHS-compliant packaging.

Supply support for STBV45-AP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STBV45 series belongs to ST's high-voltage bipolar power transistor product line, engineered specifically for energy-efficient lighting and offline power conversion where fast switching, voltage robustness, and production consistency are essential.

FAQ

Is STBV45-AP pin-compatible with STBV45?

Yes - STBV45-AP uses the same TO-92 lead frame geometry and pin assignment (E-B-C) as STBV45, but is supplied in ammopack tape format per mechanical drawing 0050910S. The internal die and electrical specs are identical; only packaging differs.

What is the maximum recommended case temperature for continuous operation?

The absolute maximum junction temperature is 150 °C. With R_thj-case = 131.6 °C/W and P_TOT = 0.95 W, the case temperature must remain ≤ 25 °C for full-rated power. Derating is required above 25 °C per Figure 3 in the datasheet.

Can STBV45-AP be used in avalanche mode?

No - STBV45-AP is not rated for repetitive avalanche operation. Its V_CES = 700 V is an absolute maximum rating under non-repetitive conditions. Safe operation requires external clamping or snubbers to limit V_CE to ≤ 400 V during switching transients.

Does STBV45-AP require a base resistor in standard CFL driver circuits?

Yes - a base resistor is mandatory to limit I_B within 0.4 A absolute maximum. Typical designs use 1–2.2 kΩ for 12–15 V drive to achieve I_B ≈ 40–75 mA, ensuring saturation while avoiding excessive base power dissipation.

STBV45-AP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 750 mA

Voltage - Collector Emitter Breakdown (Max):: 400 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 135mA, 400mA

Current - Collector Cutoff (Max):: 250µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 5 @ 400mA, 5V

Power - Max:: 950 mW

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92AP

STBV45-AP FAQ

1.How can I place an order for STBV45-AP through Aetrix?

Please submit a Request for Quotation (RFQ) for STBV45-AP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STBV45-AP reliable?

The price and inventory of STBV45-AP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STBV45-AP is usually 5 days.

3.What payment methods are accepted for STBV45-AP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STBV45-AP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STBV45-AP?

STBV45-AP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STBV45-AP order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STBV45-AP?

For technical support, including STBV45-AP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STBV45-AP requirements.

6.How does Aetrix verify that STBV45-AP is sourced from the original manufacturer or authorized distributors?

All STBV45-AP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STBV45-AP meets industry standards.

7.What is the process for return or replacement of STBV45-AP?

All STBV45-AP units undergo pre-shipment inspection (PSI). If there is an issue with STBV45-AP, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STBV45-AP part is unused and in its original packaging.

Return procedure for STBV45-AP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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