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Nexperia USA Inc. BZX84W-B62X
- Part No.:
- BZX84W-B62X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B62X.pdf
- Description:
- DIODE ZENER 62V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:50
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Product details
Overview
BZX84W-B62X from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 62 V nominal Zener voltage at 5 mA, 150 Ω differential resistance, and 64.4 mV/K temperature coefficient. It delivers stable reference voltage in power supply feedback loops, overvoltage clamping circuits, and precision bias networks operating up to +150 °C ambient.
For engineers reviewing the BZX84W-B62X datasheet, BZX84W-B62X pinout, BZX84W-B62X application, or BZX84W-B62X equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient behavior at operating current, junction-to-ambient thermal resistance, and non-repetitive surge capability under transient conditions.
Technical Context
This device operates as a reverse-biased silicon Zener diode with sharp breakdown knee and low dynamic impedance (150 Ω at IZ = 5 mA), enabling precise voltage regulation in low-power analog and digital subsystems. Its ±2% initial tolerance and predictable temperature coefficient (64.4 mV/K at IZ = 2 mA) support stable reference generation across industrial temperature ranges.
The SOT323 package provides minimal footprint (2.2 × 1.35 mm) and thermal resistance of 455 K/W (junction-to-ambient, FR4 PCB), limiting continuous dissipation to 275 mW at 25 °C ambient. Non-repetitive peak reverse power handling reaches 40 W for 100 µs pulses, supporting transient suppression in compact DC-DC converter designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V nominal at IZ = 2 mA; tight ±2% tolerance ensures accurate voltage reference without post-calibration. |
| Differential Resistance (rdif) | 150 Ω max at IZ = 2 mA; low impedance maintains regulation stability under load current variation. |
| Temperature Coefficient (SZ) | 64.4 mV/K at IZ = 2 mA; positive drift enables predictable compensation in temperature-sensitive references. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; defines maximum continuous DC power in standard layout. |
| Reverse Current (IR) | 50 nA max at VR = 0.7 × VZnom; ultra-low leakage preserves accuracy in high-impedance bias networks. |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs; supports ESD and surge protection in low-energy transient events. |
| Junction Temperature (Tj) | 150 °C max; enables operation in extended-temperature industrial environments without derating. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount package: 2.2 mm × 1.35 mm body, 0.65 mm pitch, 0.1 mm A1 height, 3-terminal configuration with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward conduction terminal; connects to lower-potential node in reverse-bias regulation configuration. |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask opening required. |
| 3 | Cathode (K) | Zener breakdown terminal; connects to higher-potential node and regulates voltage relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables single-supply reference accuracy within 1.24 V at 62 V without trimming or selection sorting. |
| Low differential resistance (150 Ω) | Maintains <±0.3 V output shift across 1–5 mA Zener current range, critical for feedback loop stability. |
| Positive temperature coefficient (64.4 mV/K) | Allows predictable drift compensation when paired with negative-coefficient components in reference stacks. |
| 455 K/W junction-to-ambient thermal resistance | Permits 275 mW dissipation on standard FR4 without heatsinking-sufficient for most low-current regulation tasks. |
| 40 W non-repetitive surge rating | Clamps 100 µs transients up to 40 V × 1 A without degradation, supporting IEC 61000-4-5 Level 3 immunity. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Circuit |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Provides precise 62 V reference at TL431 cathode input to set secondary-side regulation threshold. Use Value: ±2% tolerance eliminates need for external resistor trimming; 150 Ω rdif minimizes feedback error under load step changes. |
Use Scenario: Protecting microcontroller I/O pins against 60 V industrial bus surges. IC Role / Device Role / Timing Role: Acts as shunt clamp between signal line and ground, conducting only above 62 V breakdown. Use Value: 40 W pulse rating absorbs 100 µs transients; 50 nA leakage avoids signal distortion during normal operation. |
| Precision Bias Network | Temperature-Compensated Reference Stack |
|
Use Scenario: Generating stable 62 V bias for high-voltage op-amp input stages in sensor front-ends. IC Role / Device Role / Timing Role: Supplies regulated voltage to op-amp V+ rail while rejecting ripple from upstream DC-DC stage. Use Value: 64.4 mV/K coefficient allows pairing with NTC thermistors to achieve <±10 ppm/°C net drift over −40 to +85 °C. |
Use Scenario: Building a 12.4 V reference by stacking two BZX84W-B62X diodes in series with opposing polarity. IC Role / Device Role / Timing Role: One diode operates in forward mode (0.9 V drop), the other in reverse Zener mode (62 V), yielding composite reference. Use Value: Forward VF (0.9 V) and Zener VZ (62 V) combine predictably; ±2% tolerance bounds total stack error to ±1.26 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C62 | ±5% tolerance (vs. ±2%), higher differential resistance (215 Ω), same VZ = 62 V nominal. | Acceptable where cost sensitivity outweighs reference accuracy; unsuitable for closed-loop feedback requiring tight regulation. | Select when budget constraints dominate and system-level calibration compensates for wider tolerance. |
| MMBZ5262B | Same ±2% tolerance but TO-236 (SOT-23) package; 220 Ω rdif, 250 mW Ptot, 500 nA IR at VR = 43.4 V. | Larger footprint (2.9 × 1.3 mm vs. 2.2 × 1.35 mm); lower surge rating (25 W vs. 40 W); less suitable for space-constrained layouts. | Choose only if legacy SOT-23 compatibility is mandatory and board area permits larger package. |
Compared with BZX84W-C62, the BZX84W-B62X offers tighter regulation and lower impedance for feedback-critical roles; versus MMBZ5262B, it delivers superior surge resilience and smaller footprint-making it optimal for modern miniaturized industrial power designs.
Availability
BZX84W-B62X is available at Aetrix Electronics and suitable for industrial power supplies, embedded sensor interfaces, and automotive-adjacent control modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84W-B62X 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in space-constrained, thermally demanding applications across industrial and communications equipment.
FAQ
What is the maximum continuous Zener current for BZX84W-B62X at 85 °C ambient?
At 85 °C ambient, derating applies per the 275 mW rating at 25 °C and thermal resistance of 455 K/W. Junction temperature must stay ≤150 °C, allowing ~170 mW dissipation. With VZ = 62 V, this supports up to 2.74 mA continuous Zener current-well below the 200 mA absolute maximum forward current limit.
Can BZX84W-B62X be used in series for higher reference voltages?
Yes-two BZX84W-B62X diodes in series yield ~124 V reference. Each contributes 62 V ±2%, so total tolerance remains ±2% (not ±4%). Differential resistance adds linearly (300 Ω), and temperature coefficients sum (128.8 mV/K), enabling predictable high-voltage reference design with matched devices.
Is the n.c. pin (Pin 2) electrically isolated or internally bonded?
Pin 2 is confirmed as not connected per Nexperia's official pinning table and package drawings. It is electrically isolated from all internal die structures and must remain unconnected on PCB-no routing, solder mask relief, or thermal pad is required or recommended.
How does the 64.4 mV/K temperature coefficient affect long-term reference stability?
At 62 V nominal, 64.4 mV/K equals +1040 ppm/°C drift. Over a 100 °C range (−40 to +60 °C), this causes ~6.4 V shift. For stable references, pair with negative-TC components (e.g., forward-biased diodes) or use in compensated circuits-never rely on standalone drift performance beyond ±1 °C ambient variation.
BZX84W-B62X 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):
- 62 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 215 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 43.4 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-B62X FAQ
1.How can I place an order for BZX84W-B62X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B62X 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-B62X reliable?
The price and inventory of BZX84W-B62X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B62X is usually 5 days.
3.What payment methods are accepted for BZX84W-B62X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B62X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B62X?
BZX84W-B62X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B62X 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-B62X?
For technical support, including BZX84W-B62X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B62X requirements.
6.How does Aetrix verify that BZX84W-B62X is sourced from the original manufacturer or authorized distributors?
All BZX84W-B62X 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-B62X meets industry standards.
7.What is the process for return or replacement of BZX84W-B62X?
All BZX84W-B62X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B62X, 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-B62X part is unused and in its original packaging.
Return procedure for BZX84W-B62X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B62X Tags
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