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Nexperia USA Inc. BZX84W-B2V7-QF
- Part No.:
- BZX84W-B2V7-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B2V7-QF.pdf
- Description:
- DIODE ZENER 2.7V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,500
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Product details
Overview
BZX84W-B2V7-QF from Nexperia is a ±2 % tolerance Zener diode in SOT323 (SC-70) package, rated for 2.7 V nominal regulation voltage at 5 mA, with 275 mW total power dissipation and 20 µA reverse current at 1 V, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZX84W-B2V7-QF datasheet, BZX84W-B2V7-QF pinout, BZX84W-B2V7-QF application, or BZX84W-B2V7-QF equivalent, this part supports AEC-Q101-compliant designs requiring stable low-voltage regulation, compact SMD footprint, and tight-tolerance Zener behavior under transient load conditions.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 2.7 V reverse breakdown voltage across its cathode–anode terminals when reverse-biased above its knee voltage. Its differential resistance of ≤100 Ω at 5 mA ensures minimal voltage deviation under varying load currents.
The temperature coefficient of −2.0 mV/K (typical at 5 mA) indicates predictable, negative drift with rising junction temperature-critical for biasing circuits where thermal stability directly impacts reference accuracy in engine control units and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.65 V to 2.75 V at IZ = 5 mA - defines precise regulation window for 2.7 V nominal rail stabilization |
| Tolerance | ±2 % - enables tighter system-level voltage margin control vs. ±5 % variants in safety-critical sensing |
| Reverse Current (IR) | 20 µA at VR = 1 V - confirms low leakage for standby-power-sensitive applications like always-on ECUs |
| Power Dissipation (Ptot) | 275 mW on FR4 PCB - sets maximum continuous power handling without heatsinking in space-constrained modules |
| Differential Resistance (rdif) | ≤100 Ω at IZ = 5 mA - limits output voltage shift to ≤0.5 V per 5 mA load change, supporting stable feedback loops |
| Junction Temperature (Tj) | −55 °C to +150 °C - qualifies operation across full automotive under-hood thermal range |
| Thermal Resistance (Rth(j-a)) | 455 K/W - determines self-heating rise (~125 °C at full 275 mW), informing derating in sealed enclosures |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.3 mm × 2.2 mm × 0.95 mm body, 0.65 mm pitch, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 (n.c.) | No connection | Internally unconnected; must remain floating-no routing or solder mask relief required |
| 3 (Cathode) | Cathode connection | Reverse-biased terminal; ties to regulated voltage rail and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per discrete semiconductor stress test standard |
| Low capacitance (6 pF) | Minimizes high-frequency signal coupling in RF front-end bias networks and EMI filter references |
| Wide voltage range (2.4 V–75 V) | Enables single-package-family scalability across 12 V, 24 V, and 48 V automotive subsystems without redesign |
| High surge capability (40 W, 100 µs) | Withstands ISO 7637-2 pulse 1/2a transients without degradation in infotainment and ADAS power domains |
| Standard SOT323 footprint | Ensures drop-in compatibility with existing pick-and-place tooling and IPC-7351B-compliant land patterns |
Applications
| Engine Control Unit (ECU) Reference | Automotive Sensor Biasing |
|---|---|
|
Use Scenario: Providing stable 2.7 V reference for analog-to-digital converter (ADC) input scaling in diesel ECU microcontrollers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise ground-referenced threshold for throttle position and manifold pressure sensors. Use Value: ±2 % tolerance and −2.0 mV/K TC ensure ADC code error remains within ±0.5 LSB over −40 °C to +125 °C ambient, meeting ASIL-B functional safety requirements. |
Use Scenario: Biasing silicon photodiode arrays in rain/light sensors mounted behind vehicle windshields. IC Role / Device Role / Timing Role: Low-noise, low-capacitance voltage clamp setting reverse-bias potential across photodiode junctions. Use Value: 6 pF capacitance and 20 µA leakage prevent signal distortion at 100 kHz modulation frequencies while enabling <1 µA dark-current offset stability. |
| Infotainment Power Sequencing | Body Control Module (BCM) Overvoltage Protection |
|
Use Scenario: Regulating auxiliary 2.7 V supply for HDMI CEC controller ICs during cold-cranking events (6 V battery dip). IC Role / Device Role / Timing Role: Standby-mode Zener clamp absorbing transient energy while maintaining logic-level integrity for wake-up signaling. Use Value: 40 W non-repetitive peak power rating handles 100 µs ISO 7637-2 Pulse 1 surges without parametric shift, preserving CEC bus interoperability. |
Use Scenario: Protecting LIN transceiver inputs against load-dump-induced overvoltage in door module electronics. IC Role / Device Role / Timing Role: Fast-acting shunt limiter clamping LIN bus voltage to 2.7 V before transceiver damage threshold (typically 6 V). Use Value: 275 mW steady-state dissipation allows sustained clamping during 500 ms load-dump events at 12 V systems, preventing false resets and communication loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C2V7-Q | ±5 % tolerance (2.5 V–2.9 V range) vs. ±2 % (2.65 V–2.75 V); identical package, power, and thermal specs | Acceptable where system-level calibration compensates for wider VZ spread; not suitable for ASIL-B ADC references | Select when cost sensitivity outweighs precision requirement and post-manufacturing trimming is available |
| MMSZ4678T1G | 2.7 V ±5 %, SOD-123 package (larger footprint), 500 mW Ptot, higher Rth(j-a) (300 K/W) | Supports higher continuous power but requires 3× board area; lacks AEC-Q101 certification | Choose only for non-automotive industrial use where thermal headroom >275 mW is mandatory and space permits |
Compared with BZX84W-C2V7-Q, the BZX84W-B2V7-QF delivers tighter regulation for safety-critical analog functions; versus MMSZ4678T1G, it trades power headroom for AEC-Q101 compliance and 40 % smaller PCB area-making it optimal for modern automotive ECU miniaturization.
Availability
BZX84W-B2V7-QF is available at Aetrix Electronics and suitable for automotive ECU design, sensor interface development, and body control module production requiring stable component supply with guaranteed AEC-Q101 traceability.
Supply support for BZX84W-B2V7-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.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation in harsh automotive environments-including under-hood, chassis, and infotainment subsystems.
FAQ
What is the maximum continuous reverse current the BZX84W-B2V7-QF can sustain without exceeding its 275 mW rating?
At 2.7 V Zener voltage, the absolute maximum continuous reverse current is 102 mA (275 mW ÷ 2.7 V), assuming Tamb = 25 °C on standard FR4 PCB. Derating is required above 25 °C per the 455 K/W thermal resistance-e.g., at 85 °C ambient, max IZ drops to ~65 mA to hold Tj ≤ 150 °C.
Does the "n.c." pin (pin 2) require any PCB layout treatment such as keep-out or thermal relief?
No. Pin 2 is internally unconnected and electrically isolated; it requires no copper connection, solder mask opening, or thermal relief. Standard SOT323 land pattern (0.55 mm pad width, 0.6 mm length) applies-no modification needed for pin 2, which serves only mechanical anchoring.
How does the −2.0 mV/K temperature coefficient impact performance in a 125 °C under-hood environment?
From 25 °C to 125 °C (ΔT = 100 K), the Zener voltage shifts by −200 mV (−2.0 mV/K × 100 K), resulting in a typical VZ of 2.5 V at 125 °C. This predictable drift is factored into ECU reference design margins and remains within ASIL-B allowable error bands when combined with ADC calibration.
Can BZX84W-B2V7-QF replace older BZX84-C2V7 parts in existing automotive designs?
Yes-mechanically and electrically compatible with BZX84-C2V7 in SOT23 packages, but BZX84W-B2V7-QF offers superior thermal performance (lower Rth(j-a)), tighter tolerance (±2 % vs. ±5 %), and formal AEC-Q101 qualification. Layout adaptation to SOT323 footprint is required, and revalidation of surge immunity per ISO 7637-2 is recommended.
BZX84W-B2V7-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±1.85%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 20 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B2V7-QF FAQ
1.How can I place an order for BZX84W-B2V7-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B2V7-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 BZX84W-B2V7-QF reliable?
The price and inventory of BZX84W-B2V7-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B2V7-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B2V7-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B2V7-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B2V7-QF?
BZX84W-B2V7-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B2V7-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 BZX84W-B2V7-QF?
For technical support, including BZX84W-B2V7-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B2V7-QF requirements.
6.How does Aetrix verify that BZX84W-B2V7-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B2V7-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 BZX84W-B2V7-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B2V7-QF?
All BZX84W-B2V7-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B2V7-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 BZX84W-B2V7-QF part is unused and in its original packaging.
Return procedure for BZX84W-B2V7-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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