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Nexperia USA Inc. BZX84W-B3V6-QF
- Part No.:
- BZX84W-B3V6-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B3V6-QF.pdf
- Description:
- DIODE ZENER 3.6V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
BZX84W-B3V6-QF from Nexperia is a ±2 % tolerance Zener diode in SOT323 (SC-70) package, rated for 3.6 V nominal regulation voltage at 5 mA, with 275 mW total power dissipation and qualified to AEC-Q101 for automotive use. It delivers stable voltage reference in low-power biasing, overvoltage clamping, and precision threshold detection circuits.
For engineers reviewing the BZX84W-B3V6-QF datasheet, BZX84W-B3V6-QF pinout, BZX84W-B3V6-QF application, or BZX84W-B3V6-QF equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (455 K/W), reverse leakage (5 µA at VR = 1 V), and AEC-Q101 qualification status for harsh-environment deployment.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain 3.6 V across its terminals within ±2 % tolerance when biased at 5 mA. Its differential resistance is 600 Ω at 1 mA and 90 Ω at 5 mA, enabling predictable regulation under varying load conditions.
The temperature coefficient is −2.4 mV/K at 5 mA, indicating moderate negative drift with junction temperature rise. It supports non-repetitive surge handling up to 40 W for 100 µs pulses and is specified for operation from −55 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.53 V to 3.67 V at IZ = 5 mA - defines precise regulation window for reference or clamp applications |
| Tolerance | ±2 % - ensures tight voltage matching critical in automotive sensor biasing and ADC reference circuits |
| Power Dissipation (Ptot) | 275 mW on FR4 PCB - sets maximum continuous DC power handling without heatsinking |
| Reverse Leakage (IR) | 5 µA at VR = 1 V - low leakage preserves accuracy in high-impedance feedback paths |
| Differential Resistance (rdif) | 90 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Thermal Resistance (Rth(j-a)) | 455 K/W - quantifies junction-to-ambient heat transfer efficiency on standard single-sided FR4 |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - relevant for polarity-check or dual-function forward-conduction use cases |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, and 0.25 mm max A1 height per JEDEC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential node during Zener operation |
| 2 | Not Connected (n.c.) | Electrically isolated internal pad; no circuit function or routing required |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential node to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ±2 % Zener tolerance | Enables tighter system-level voltage margin control than ±5 % variants in safety-critical sensing |
| SOT323 ultra-small footprint | 0.65 mm pitch and 1.3 mm × 1.8 mm body enables high-density PCB layouts in space-constrained modules |
| Low 5 µA leakage at 1 V | Minimizes error in high-resistance divider networks used for battery monitoring or rail supervision |
| −2.4 mV/K tempco | Predictable negative drift allows compensation in temperature-stable reference designs using matched components |
Applications
| Automotive Sensor Biasing | Industrial Power Rail Clamping |
|---|---|
|
Use Scenario: Providing stable 3.6 V bias to Hall-effect position sensors in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed operating point for analog front-end amplification. Use Value: ±2 % tolerance ensures sensor output linearity remains within ASIL-B diagnostic thresholds across −40 °C to +125 °C. |
Use Scenario: Clamping 5 V supply rail against transient spikes in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protection element diverting surge energy above 3.6 V to ground. Use Value: 40 W non-repetitive peak power rating absorbs 100 µs transients without degradation per IEC 61000-4-4. |
| Portable Battery Monitoring | Medical Instrument Reference |
|
Use Scenario: Threshold detection for lithium-ion cell undervoltage lockout in wearable health monitors. IC Role / Device Role / Timing Role: Precision voltage comparator input reference defining 3.6 V cutoff point. Use Value: 5 µA reverse leakage prevents measurable current drain on microampere-scale battery monitoring circuits. |
Use Scenario: Stable reference for 12-bit ADC in portable ECG signal conditioning. IC Role / Device Role / Timing Role: Low-noise DC reference source for analog-to-digital conversion accuracy. Use Value: 90 Ω differential resistance limits reference voltage shift to <1 mV under 10 µA load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C3V6-Q | ±5 % tolerance (3.40 V–3.80 V), identical package and power rating | Acceptable where system voltage margin > ±5 %; lower cost for non-automotive consumer use | Select for cost-sensitive industrial controls where AEC-Q101 is not mandated |
| MMSZ4685T1G | 3.6 V ±5 %, SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Larger footprint and higher power, but lacks automotive qualification and tighter tolerance | Choose only if board layout permits larger package and automotive compliance is unnecessary |
Compared with BZX84W-B3V6-QF, the BZX84W-C3V6-Q offers relaxed tolerance at equal form factor and qualification, while MMSZ4685T1G trades automotive reliability and compactness for higher power and non-qualified cost structure-making BZX84W-B3V6-QF optimal for space-constrained, safety-aware automotive subsystems.
Availability
BZX84W-B3V6-QF is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial rail clamping, and portable battery monitoring requiring stable component supply, AEC-Q101 traceability, and SOT323 footprint compatibility.
Supply support for BZX84W-B3V6-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX84W-Q series targets automotive and industrial applications demanding AEC-Q101-qualified Zener diodes with tight tolerances, low leakage, and ultra-small SOT323 packaging for next-generation ECUs and power management systems.
FAQ
What is the maximum continuous reverse current this Zener can handle at 3.6 V?
The BZX84W-B3V6-QF is rated for 200 mA maximum forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 3.6 V, the maximum safe DC reverse current is 76 mA (275 mW ÷ 3.6 V), assuming 25 °C ambient and standard FR4 mounting. Derating applies above 25 °C per the 455 K/W thermal resistance.
Does the n.c. pin require PCB routing or grounding?
No. Pin 2 is internally not connected and electrically isolated. It must remain unconnected on the PCB-no trace, pad, or via should be routed to it. The SOT323 footprint accommodates this terminal as a mechanical alignment aid only, with no electrical function.
How does the −2.4 mV/K temperature coefficient affect regulation accuracy over temperature?
At 5 mA bias, the Zener voltage decreases by 2.4 mV per Kelvin rise in junction temperature. Over a 100 K range (e.g., −40 °C to +60 °C), this causes a 240 mV shift-approximately 6.7 % of nominal 3.6 V. System-level compensation (e.g., matched thermistors or digital calibration) is recommended for applications requiring <1 % total voltage error across temperature.
Can this part replace older BZX84C3V6 in existing designs?
Yes, with caveats: BZX84W-B3V6-QF offers tighter ±2 % tolerance and AEC-Q101 qualification versus the legacy BZX84C3V6's ±5 % and commercial-grade rating. Electrical performance is compatible, but the SOT323 package has different solder pad geometry than the SOT23 used by BZX84C3V6-PCB redesign is required for mechanical fit.
BZX84W-B3V6-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):
- 3.6 V
- Tolerance:
- ±1.94%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-B3V6-QF FAQ
1.How can I place an order for BZX84W-B3V6-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B3V6-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-B3V6-QF reliable?
The price and inventory of BZX84W-B3V6-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-B3V6-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B3V6-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B3V6-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B3V6-QF?
BZX84W-B3V6-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B3V6-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-B3V6-QF?
For technical support, including BZX84W-B3V6-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B3V6-QF requirements.
6.How does Aetrix verify that BZX84W-B3V6-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B3V6-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-B3V6-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B3V6-QF?
All BZX84W-B3V6-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B3V6-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-B3V6-QF part is unused and in its original packaging.
Return procedure for BZX84W-B3V6-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B3V6-QF Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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