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Nexperia USA Inc. BSR33-QF
- Part No.:
- BSR33-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BSR33-QF.pdf
- Description:
- TRANS PNP 80V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:9,252
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Product details
Overview
BSR33-QF from Nexperia is a PNP medium power transistor in SOT89 package, rated for −80 V VCEO, −1 A continuous collector current, and 1.35 W total power dissipation at Tamb ≤ 25 °C. It features an exposed heatsink pad for enhanced thermal conduction and is qualified to AEC-Q101 for automotive-grade reliability. It serves as a high-side switch or linear regulator pass device in battery-powered systems.
For engineers reviewing the BSR33-QF datasheet, BSR33-QF pinout, BSR33-QF application, or BSR33-QF equivalent, this page delivers verified electrical parameters, thermal resistance values (Rth(j-sp) = 13 K/W), DC current gain range (hFE = 100–300 at −100 mA), saturation voltage specs, and confirmed automotive qualification status - all critical for high-reliability power control design.
Technical Context
This PNP bipolar junction transistor operates with reverse-polarity biasing: emitter at highest potential, collector at lower potential, base driven negative relative to emitter. Its −80 V VCEO and −90 V VCBO support robust blocking in 24 V and 48 V automotive supply rails. The exposed collector pad in SOT89 enables direct thermal coupling to PCB copper, reducing Rth(j-a) to 93 K/W in free air and Rth(j-sp) to just 13 K/W to solder point.
It delivers hFE ≥ 100 at −100 mA and ≥ 50 at −500 mA, enabling stable current amplification across load ranges. VCE(sat) ≤ −0.25 V at −150 mA/−15 mA ensures low conduction loss in linear regulation and switching applications, while fT = 100 MHz supports moderate-speed switching up to ~10 MHz with appropriate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −80 V: Maximum safe collector-emitter voltage with base open; defines blocking capability in high-side switch configurations. |
| IC | −1 A continuous: Rated DC collector current; determines maximum steady-state load handling in regulators or drivers. |
| Ptot | 1.35 W at Tamb ≤ 25 °C: Total power dissipation limit on FR4 PCB with 6 cm² collector pad; sets thermal derating envelope. |
| hFE | 100–300 at −100 mA: DC current gain range; enables predictable base drive sizing for linear or saturated operation. |
| VCE(sat) | ≤ −0.25 V at −150 mA/−15 mA: Low saturation voltage minimizes power loss and self-heating in switching mode. |
| Rth(j-sp) | 13 K/W: Junction-to-solder-point thermal resistance; quantifies heat transfer efficiency to PCB copper via exposed collector. |
| fT | 100 MHz: Transition frequency at −10 V VCE, −50 mA IC; indicates usable bandwidth for analog amplification or fast switching. |
Pinout & Package
SOT89 plastic surface-mount package with 3 leads, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body, featuring an exposed collector pad for thermal and electrical conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current source terminal; connected to highest potential node in PNP high-side configuration. |
| 2 | Collector | Main current sink terminal; electrically and thermally tied to exposed metal pad on underside of package. |
| 3 | Base | Control input; requires negative bias relative to emitter to turn on; drives current into base to enable conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Enables direct thermal path to PCB copper, achieving Rth(j-sp) = 13 K/W for stable operation under sustained load. |
| AEC-Q101 qualification | Validated for automotive applications per Stress Test Qualification for Discrete Semiconductors; supports under-hood deployment. |
| High power dissipation | 1.35 W rating at 25 °C ambient on standard FR4 board allows use in space-constrained linear regulators without external heatsinks. |
| High DC current gain | hFE ≥ 100 at −100 mA ensures low base drive current requirements, reducing driver stage complexity and power loss. |
| Robust voltage ratings | −80 V VCEO and −90 V VCBO provide margin for transients in 24 V/48 V automotive and industrial power systems. |
Applications
| Linear Voltage Regulators | High-Side Switches |
|---|---|
|
Use Scenario: Used as pass transistor in adjustable linear regulators supplying microcontrollers or sensors from 12–48 V battery sources. IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via emitter-follower configuration with feedback loop. Use Value: Low VCE(sat) (≤ −0.25 V) minimizes dropout voltage and improves efficiency at 1 A load; AEC-Q101 ensures reliability in vehicle power domains. |
Use Scenario: Controls power delivery to loads such as lighting modules or actuators in automotive body electronics. IC Role / Device Role / Timing Role: High-side switch placed between battery rail and load, turned on by negative base drive relative to emitter. Use Value: −80 V VCEO withstands load-dump transients; exposed collector pad maintains Tj < 150 °C during 1 A continuous operation. |
| Battery-Driven Devices | MOSFET Drivers |
|
Use Scenario: Provides regulated or switched power in portable medical devices, handheld test equipment, and industrial IoT nodes. IC Role / Device Role / Timing Role: Power control element managing battery discharge paths and protecting downstream circuitry. Use Value: −1 A IC and 1.35 W Ptot support compact, fanless designs; wide Tamb range (−65 to +150 °C) accommodates extreme environments. |
Use Scenario: Drives N-channel MOSFET gates in half-bridge or synchronous buck converters where high-side gate drive is required. IC Role / Device Role / Timing Role: Level-shifting switch that pulls gate low relative to source when used in bootstrap or charge-pump gate driver stages. Use Value: Fast fT = 100 MHz and low VBE(sat) (≤ −1.2 V) enable efficient, low-loss gate charging/discharging at switching frequencies up to 10 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BSR43-Q | NPN complement; same SOT89 package, −80 V VCEO, 1 A IC, but requires positive base drive and inverted topology. | Used in low-side switching or NPN-based regulators; not interchangeable without circuit redesign. | Select only when NPN configuration is preferred or existing layout uses complementary pairing. |
| MMBT3906LT1G | SOT23 package; lower Ptot = 300 mW, −40 V VCEO, −200 mA IC; no exposed pad or AEC-Q101 qualification. | Suitable for signal-level switching or low-power logic, not for 1 A automotive power control. | Choose only for cost-sensitive, non-automotive, sub-200 mA applications where thermal performance is secondary. |
Compared with BSR43-Q and MMBT3906LT1G, BSR33-QF provides uniquely balanced high-current capability, automotive qualification, and thermal performance in SOT89 - making it the sole option among the three for 1 A AEC-Q101-compliant high-side power control.
Availability
BSR33-QF is available at Aetrix Electronics and suitable for linear voltage regulators, high-side switches, and battery-driven devices requiring stable component supply, automotive-grade qualification, and reliable thermal management in compact SMT layouts.
Supply support for BSR33-QF 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
BSR33-QF belongs to Nexperia's AEC-Q101-qualified medium-power bipolar transistor family, engineered specifically for robust linear regulation, high-side switching, and MOSFET driving in harsh automotive and industrial environments.
FAQ
What is the maximum allowable junction temperature for BSR33-QF?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation above this temperature risks permanent device degradation. Derating is required above 25 °C ambient, based on Rth(j-a) = 93 K/W and the specified mounting conditions (FR4 PCB, 6 cm² collector pad).
Is BSR33-QF pin-compatible with other SOT89 PNP transistors?
BSR33-QF follows standard SOT89 pinning: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. While mechanical footprint matches generic SOT89, electrical compatibility depends on VCEO, IC, hFE, and thermal specs - e.g., MMBT3906LT1G uses SOT23 and is not pin-compatible.
Does BSR33-QF require a heatsink in typical applications?
No external heatsink is required when mounted per specification: single-sided FR4 PCB with 6 cm² tin-plated copper pad under the exposed collector. At 1 A and 25 °C ambient, junction temperature remains within limits due to Rth(j-sp) = 13 K/W - sufficient for most automotive and industrial linear applications.
How does the AEC-Q101 qualification impact BSR33-QF's use in non-automotive designs?
AEC-Q101 qualification confirms extended reliability testing (HTOL, TC, HAST, etc.) beyond standard commercial grades. This translates to higher confidence in long-term stability, reduced infant mortality, and improved robustness in industrial, medical, or telecom applications - even if automotive use is not required.
BSR33-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 5V
- Power - Max:
- 1.35 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BSR33-QF FAQ
1.How can I place an order for BSR33-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BSR33-QF 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 BSR33-QF reliable?
The price and inventory of BSR33-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSR33-QF is usually 5 days.
3.What payment methods are accepted for BSR33-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSR33-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BSR33-QF?
BSR33-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BSR33-QF 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 BSR33-QF?
For technical support, including BSR33-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSR33-QF requirements.
6.How does Aetrix verify that BSR33-QF is sourced from the original manufacturer or authorized distributors?
All BSR33-QF 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 BSR33-QF meets industry standards.
7.What is the process for return or replacement of BSR33-QF?
All BSR33-QF units undergo pre-shipment inspection (PSI). If there is an issue with BSR33-QF, 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 BSR33-QF part is unused and in its original packaging.
Return procedure for BSR33-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BSR33-QF Tags
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