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Nexperia USA Inc. BZX84W-B3V6F
- Part No.:
- BZX84W-B3V6F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B3V6F.pdf
- Description:
- DIODE ZENER 3.6V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8
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Product details
Overview
BZX84W-B3V6F from Nexperia is a ±2 % tolerance Zener diode in SOT323 (SC-70) package, rated for 3.6 V nominal regulation at 5 mA, with 90 Ω differential resistance and −2.4 mV/K temperature coefficient. It delivers stable voltage reference in low-power analog circuits, power supply feedback paths, and overvoltage protection for microcontroller I/O pins.
For engineers reviewing the BZX84W-B3V6F datasheet, BZX84W-B3V6F pinout, BZX84W-B3V6F application, or BZX84W-B3V6F equivalent, this page provides verified Zener parameters, thermal limits, SOT323 terminal mapping, and real-world use cases for precision 3.6 V clamping and biasing in space-constrained designs.
Technical Context
This Zener operates in reverse breakdown with a specified 3.6 V nominal working voltage at IZ = 5 mA, maintaining regulation across ambient temperatures from −55 °C to +150 °C. Its −2.4 mV/K temperature coefficient ensures predictable drift under thermal variation, critical for stable reference accuracy.
The device exhibits 90 Ω differential resistance at 5 mA, enabling tight regulation under load changes, and supports non-repetitive peak reverse power dissipation up to 40 W for surge suppression. Its 5 µA maximum reverse current at VR = 1 V confirms low leakage in standby conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V at IZ = 5 mA - precise regulation point for 3.3 V system rail monitoring and clamping |
| Tolerance | ±2 % - enables tighter voltage margin control than ±5 % variants in feedback loops |
| Differential Resistance | 90 Ω at IZ = 5 mA - low impedance improves regulation stability against current fluctuations |
| Reverse Current | 5 µA max at VR = 1 V - minimal leakage preserves battery life in always-on sensing nodes |
| Total Power Dissipation | 275 mW at Tamb = 25 °C on FR4 PCB - defines maximum continuous DC power handling in standard layout |
| Junction Temperature Limit | 150 °C - sets upper thermal boundary for operation in sealed enclosures or high-ambient environments |
| Thermal Resistance | 455 K/W junction-to-ambient - quantifies self-heating rise per watt, critical for derating in compact PCBs |
Pinout & Package
SOT323 (SC-70) leadless surface-mount package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height, optimized for high-density PCB assembly and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask opening required |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated output or voltage reference node |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables accurate 3.6 V reference without post-production trimming in cost-sensitive consumer electronics |
| Low 90 Ω differential resistance | Maintains <±10 mV output shift across 1–10 mA load current range in voltage monitor circuits |
| −2.4 mV/K temperature coefficient | Delivers predictable, linear drift of −0.086 %/°C-suitable for industrial-grade temperature compensation |
| 275 mW power rating on FR4 | Supports sustained 5 mA regulation current with 55 °C junction rise above ambient |
| SOT323 ultra-small footprint | Reduces board area by >60 % vs. DO-35, enabling placement adjacent to IC power pins |
Applications
| Microcontroller I/O Protection | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Clamping 3.3 V GPIO lines against ESD transients and overvoltage events in portable IoT devices. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess voltage to ground before MCU input damage occurs. Use Value: 3.6 V breakdown threshold ensures safe margin below 3.63 V absolute maximum rating of typical 3.3 V logic inputs. |
Use Scenario: Providing stable 3.6 V bias to analog front-end op-amps and ADC reference inputs in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source delivering low-drift, low-noise DC bias independent of supply variation. Use Value: −2.4 mV/K TC and 90 Ω rdif enable <±15 mV total error over −40 °C to +85 °C operating range. |
| DC-DC Feedback Reference | USB-C Port Overvoltage Clamp |
Use Scenario: Setting output voltage in adjustable buck converter feedback networks where space prohibits larger Zener packages. IC Role / Device Role / Timing Role: Shunt regulator element defining regulated output via resistor divider connected to FB pin. Use Value: ±2 % tolerance allows direct use without external trimming resistors, reducing BOM count and layout complexity. |
Use Scenario: Protecting USB-C CC line receivers from accidental 5 V or 9 V misconnection during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting clamp limiting CC pin voltage to 3.6 V before internal ESD diodes conduct. Use Value: 5 µA leakage at 1 V ensures negligible current draw during normal 0.4–2.0 V CC signaling, preserving signal integrity. |
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 | ±5 % tolerance, same 3.6 V nominal, identical SOT323 package and thermal specs | Higher voltage uncertainty (±0.18 V vs. ±0.072 V) reduces suitability for tight-tolerance feedback | Select when cost sensitivity outweighs regulation accuracy requirements |
| MMSZ4685T1G | 3.6 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (2.7 × 1.6 mm), higher thermal resistance | Larger footprint and 3× higher power rating suit higher-current applications but increase PCB area | Choose when >275 mW dissipation or legacy SOD-123 layout compatibility is required |
Compared with BZX84W-B3V6F, BZX84W-C3V6 trades regulation precision for lower unit cost, while MMSZ4685T1G offers higher power handling at the expense of size and thermal performance-making the BZX84W-B3V6F optimal for space-constrained, accuracy-critical 3.6 V reference tasks.
Availability
BZX84W-B3V6F is available at Aetrix Electronics and suitable for microcontroller I/O protection, low-power sensor biasing, and DC-DC feedback reference applications requiring stable component supply and consistent ±2 % Zener tolerance.
Supply support for BZX84W-B3V6F 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 and industrial-grade components.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, stable voltage regulation in consumer, industrial, and computing applications where SOT323 footprint and tight tolerance are essential.
FAQ
What is the maximum continuous reverse current the BZX84W-B3V6F can sustain without exceeding its power limit?
At 25 °C ambient on a standard FR4 PCB, the BZX84W-B3V6F sustains 5 mA continuously (3.6 V × 5 mA = 18 mW), well below its 275 mW total power dissipation limit. Derating begins at 1.83 mW/°C above 25 °C, allowing ~4.5 mA at 85 °C ambient before reaching thermal shutdown thresholds.
How does the −2.4 mV/K temperature coefficient affect regulation accuracy over temperature?
The −2.4 mV/K coefficient causes the Zener voltage to decrease linearly with rising temperature: at 85 °C (60 °C above 25 °C), the shift is −144 mV, resulting in 3.456 V output. This 4 % deviation is fully characterized and usable in compensated designs, unlike uncharacterized drift in generic diodes.
Can Pin 2 (n.c.) be grounded or left floating in PCB layout?
Pin 2 is internally not connected and must remain electrically floating-no trace, pad, or solder mask opening should contact it. Grounding or routing to any net risks mechanical stress-induced shorting or unintended parasitic coupling, violating Nexperia's SOT323 mounting specification.
Is the BZX84W-B3V6F suitable for automotive applications?
No. Per Nexperia's revision history, the BZX84W series is explicitly non-automotive qualified. It lacks AEC-Q200 testing, automotive-grade process controls, and extended temperature validation. For automotive use, select the BZX84W-Q series or equivalent automotive-qualified Zeners with full qualification documentation.
BZX84W-B3V6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±2%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B3V6F FAQ
1.How can I place an order for BZX84W-B3V6F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B3V6F 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-B3V6F reliable?
The price and inventory of BZX84W-B3V6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B3V6F is usually 5 days.
3.What payment methods are accepted for BZX84W-B3V6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B3V6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B3V6F?
BZX84W-B3V6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B3V6F 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-B3V6F?
For technical support, including BZX84W-B3V6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B3V6F requirements.
6.How does Aetrix verify that BZX84W-B3V6F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B3V6F 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-B3V6F meets industry standards.
7.What is the process for return or replacement of BZX84W-B3V6F?
All BZX84W-B3V6F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B3V6F, 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-B3V6F part is unused and in its original packaging.
Return procedure for BZX84W-B3V6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B3V6F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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