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Nexperia USA Inc. BZX84W-B5V1-QF
- Part No.:
- BZX84W-B5V1-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B5V1-QF.pdf
- Description:
- DIODE ZENER 5.1V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,921
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Product details
Overview
BZX84W-B5V1-QF from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 5.1 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power regulation circuits such as sensor biasing, voltage clamping, and overvoltage protection in engine control units.
For engineers reviewing the BZX84W-B5V1-QF datasheet, BZX84W-B5V1-QF pinout, BZX84W-B5V1-QF application, or BZX84W-B5V1-QF equivalent, this page delivers verified Zener parameters, automotive-grade thermal and electrical specifications, SOT323 terminal mapping, and validated alternatives for precision 5.1 V regulation in space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse breakdown with a typical differential resistance of 480 Ω at 5 mA and a temperature coefficient of −0.8 mV/K, enabling stable regulation across ambient temperatures from −55 °C to +150 °C. Its 2.0 pF junction capacitance at 1 MHz and 0 V bias supports high-frequency noise suppression in signal conditioning paths.
The device sustains non-repetitive peak reverse power up to 40 W for 100 µs pulses and maintains 200 mA maximum forward current capability. Junction-to-ambient thermal resistance is 455 K/W on standard FR4 PCB, defining its derating behavior under sustained load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.00 V to 5.20 V at IZ = 5 mA - tight ±2 % tolerance ensures accurate reference in feedback loops. |
| Differential Resistance (rdif) | 480 Ω max at IZ = 5 mA - low dynamic impedance minimizes output voltage variation under load changes. |
| Temperature Coefficient (SZ) | −0.8 mV/K at IZ = 5 mA - near-zero drift enables stable operation from −40 °C to +125 °C ambient. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - defines maximum continuous DC power handling in standard layout. |
| Junction Capacitance (Cd) | 2.0 pF at f = 1 MHz, VR = 0 V - low capacitance preserves signal integrity in RF-coupled clamp applications. |
| Reverse Current (IR) | 2 µA max at VR = 2 V - low leakage maintains regulation accuracy in battery-powered standby circuits. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - enables predictable forward conduction for dual-direction protection schemes. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount package with 3 terminals: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, and 0.45 mm height - optimized for automated placement and reflow soldering on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in reverse-biased Zener configuration. |
| 2 | Not Connected (n.c.) | Internally isolated terminal; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Reverse-bias connection point; ties to regulated voltage rail or feedback node in shunt regulator topologies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including ECU, body control modules, and ADAS sensors. |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in precision voltage references and analog front-end calibration. |
| 275 mW power rating on FR4 | Supports continuous regulation in 3.3 V/5 V supply rails without heatsinking in compact consumer and industrial modules. |
| Low 2.0 pF junction capacitance | Enables effective high-frequency transient suppression in USB, CAN, and LIN bus interface protection circuits. |
| −55 °C to +150 °C operating range | Ensures reliable performance in extended-temperature environments such as powertrain and battery management systems. |
Applications
| Engine Control Unit (ECU) Sensor Biasing | Automotive CAN Bus Clamping |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog pressure and temperature sensors in engine bay environments. IC Role / Device Role / Timing Role: Shunt Zener regulator maintaining constant bias voltage despite supply ripple and thermal cycling. Use Value: Enables <1 % measurement error over −40 °C to +125 °C due to low −0.8 mV/K temperature coefficient and AEC-Q101 reliability. |
Use Scenario: Clamping transients on CAN_H/CAN_L lines during load dump or ESD events in vehicle networks. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor leveraging low 2.0 pF capacitance and fast 100 µs surge response. Use Value: Prevents data corruption by limiting line voltage to ≤5.6 V while adding <0.1 ns propagation delay to signal path. |
| Industrial PLC Input Protection | Smart Meter Reference Voltage |
Use Scenario: Protecting 24 V digital input channels against overvoltage from field wiring faults or induced surges. IC Role / Device Role / Timing Role: Zener-based crowbar element triggering external SCR latch when input exceeds 5.1 V threshold. Use Value: Achieves <50 ns response time to 1 kV/µs transients due to low junction capacitance and optimized SOT323 layout. |
Use Scenario: Generating precise 5.1 V reference for ADC and RTC circuits in revenue-grade electricity meters. IC Role / Device Role / Timing Role: Primary voltage reference source with long-term stability maintained by ±2 % initial tolerance and low tempco. Use Value: Supports 0.1 % energy measurement accuracy over 10-year service life without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5222BS-TP | 5.1 V ±5 % tolerance, 225 mW Ptot, SOT-323 package, no AEC-Q101 qualification | Limited to commercial-grade industrial controls; not approved for automotive safety-critical functions | Select when cost sensitivity outweighs automotive qualification requirements and ±5 % tolerance is acceptable. |
| Vishay BZX84-C5V1-TP | 5.1 V ±5 % tolerance, 300 mW Ptot, same SOT-323 footprint, AEC-Q101 qualified | Higher power margin but looser voltage accuracy; suitable where thermal headroom > precision is prioritized | Choose when board-level thermal design allows higher dissipation and ±5 % regulation tolerance meets system spec. |
Compared with BZX84W-B5V1-QF, the MMBZ5222BS-TP trades automotive qualification and tighter tolerance for lower unit cost, while the BZX84-C5V1-TP retains AEC-Q101 compliance but sacrifices 0.3 V regulation accuracy for +25 mW power headroom-making the BZX84W-B5V1-QF optimal for precision automotive voltage references.
Availability
BZX84W-B5V1-QF is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and smart meter reference voltage generation requiring stable component supply across multi-year production cycles.
Supply support for BZX84W-B5V1-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 automotive Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature automotive subsystems.
FAQ
What is the maximum reverse current at 2 V for BZX84W-B5V1-QF?
The maximum reverse current (IR) is 2 µA at VR = 2 V and Tj = 25 °C, as specified in Table 7 of the datasheet. This low leakage ensures minimal quiescent power draw in always-on sensor bias circuits and supports battery-life-critical applications.
Can BZX84W-B5V1-QF be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or implement active current-sharing circuitry per manufacturer guidelines.
Is the n.c. pin (Pin 2) electrically isolated or thermally coupled?
Pin 2 is internally not connected and fully electrically isolated; however, it shares the same die attach pad as Pins 1 and 3, contributing to thermal conduction path. Do not solder it to ground or signal traces, but allow it to float per SOT323 footprint recommendations.
How does the −0.8 mV/K temperature coefficient affect regulation at 125 °C ambient?
At 125 °C junction temperature, the Zener voltage shifts by approximately −0.08 V from its 25 °C value (−0.8 mV/K × 100 K), resulting in ~5.02 V regulation. This 1.6 % deviation remains within most automotive sensor reference tolerances and is fully characterized in Fig. 7 of the datasheet.
BZX84W-B5V1-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):
- 5.1 V
- Tolerance:
- ±1.96%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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-B5V1-QF FAQ
1.How can I place an order for BZX84W-B5V1-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B5V1-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-B5V1-QF reliable?
The price and inventory of BZX84W-B5V1-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-B5V1-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B5V1-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B5V1-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B5V1-QF?
BZX84W-B5V1-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B5V1-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-B5V1-QF?
For technical support, including BZX84W-B5V1-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B5V1-QF requirements.
6.How does Aetrix verify that BZX84W-B5V1-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B5V1-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-B5V1-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B5V1-QF?
All BZX84W-B5V1-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B5V1-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-B5V1-QF part is unused and in its original packaging.
Return procedure for BZX84W-B5V1-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B5V1-QF Tags
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