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Nexperia USA Inc. BZX84W-B5V1X
- Part No.:
- BZX84W-B5V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B5V1X.pdf
- Description:
- DIODE ZENER 5.1V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,410
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Product details
Overview
BZX84W-B5V1X 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, 480 Ω differential resistance, and −0.8 mV/K temperature coefficient; used for precision low-power voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the BZX84W-B5V1X datasheet, BZX84W-B5V1X pinout, BZX84W-B5V1X application, or BZX84W-B5V1X equivalent, this page delivers verified electrical parameters, thermal behavior, SOT323 terminal mapping, and real-world use cases in compact DC-DC regulation and ESD-clamped signal conditioning circuits.
Technical Context
This Zener diode operates in reverse breakdown with tightly controlled VZ = 5.00–5.20 V at IZ = 5 mA, exhibiting low dynamic impedance (480 Ω max) and negative temperature coefficient (−0.8 mV/K), enabling stable reference performance across −55 °C to +150 °C ambient range.
Its 275 mW total power dissipation is defined under FR4 PCB mounting conditions (single-sided copper, tin-plated), and non-repetitive peak reverse power handling reaches 40 W for 100 µs pulses-critical for transient suppression in low-energy surge environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.00–5.20 V at IZ = 5 mA; defines precise regulation threshold for feedback networks |
| Tolerance | ±2 % (B-series); ensures tight binning for high-accuracy reference designs |
| Differential Resistance (rdif) | ≤480 Ω at IZ = 5 mA; limits output voltage drift under load current variation |
| Temperature Coefficient (SZ) | −0.8 mV/K at IZ = 5 mA; enables predictable VZ drift compensation in wide-temp applications |
| Reverse Current (IR) | ≤2 µA at VR = 2 V; guarantees low leakage in standby and battery-powered circuits |
| Total Power Dissipation (Ptot) | 275 mW on FR4 PCB; sets maximum continuous DC power handling in standard layout |
| Junction-to-Ambient Rth(j-a) | 455 K/W; determines thermal rise under steady-state bias (e.g., +125 °C rise at full Ptot) |
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/wave soldering per Nexperia's recommended land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or thermal pad connection |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated output node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in 5.1 V reference designs without recalibration or trimming |
| Low 480 Ω differential resistance | Maintains <±10 mV output shift across 1–10 mA load changes in shunt regulator topologies |
| −0.8 mV/K temperature coefficient | Supports stable operation from −40 °C to +85 °C without external compensation components |
| 275 mW power rating on FR4 | Permits use in space-constrained 3.3 V/5 V LDO bypass and microcontroller reset circuitry |
| SOT323 ultra-small outline | Reduces board area by >50 % vs. SOD-323 while maintaining compatible reflow profile |
Applications
| Power Supply Feedback Reference | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Provides stable 5.1 V reference for TL431-based adjustable SMPS feedback divider. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, setting upper threshold of optocoupler-driven error amplifier loop. Use Value: ±2 % VZ tolerance eliminates need for post-assembly resistor trimming; 480 Ω rdif ensures <±5 mV regulation error across line/load transients. |
Use Scenario: Generates clean 5.1 V reset threshold for ARM Cortex-M0+ MCU during brown-out detection. IC Role / Device Role / Timing Role: Zener clamps RC-generated reset pulse to exact VCC-referenced level before feeding into dedicated reset input pin. Use Value: −0.8 mV/K SZ keeps reset threshold within 15 mV window from −40 °C to +85 °C, preventing spurious resets. |
| ESD-Clamped Signal Conditioning | Low-Power Sensor Biasing |
|
Use Scenario: Protects analog front-end inputs of industrial 4–20 mA transmitter against ±8 kV HBM surges. IC Role / Device Role / Timing Role: Zener diode placed between signal line and ground, conducting only above 5.1 V to clamp transients. Use Value: 40 W non-repetitive peak power rating absorbs single-event surges without degradation; 2 µA IR avoids loading 10 MΩ sensor inputs. |
Use Scenario: Supplies stable 5.1 V bias to MEMS pressure sensor bridge in battery-operated IoT node. IC Role / Device Role / Timing Role: Shunt regulator maintains constant excitation voltage despite Li-ion cell discharge from 4.2 V to 3.0 V. Use Value: 275 mW Ptot supports up to 54 mA shunt current, enabling robust biasing for 100 µA–2 mA sensor loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1 | ±5 % tolerance, higher 5.1 V min/max spread (4.8–5.4 V), 600 Ω rdif max | Acceptable where cost sensitivity outweighs regulation accuracy; less suitable for precision feedback | Select when budget constraints dominate and ±5 % VZ drift is acceptable in final system calibration |
| MMSZ5231B | Same ±2 % tolerance but SOD-123 package (2.7 × 1.6 mm), 500 Ω rdif, −0.85 mV/K SZ | Larger footprint; better thermal mass but incompatible with ultra-dense SOT323 layouts | Choose if board space allows larger package and higher thermal reliability is prioritized over miniaturization |
Compared with BZX84W-B5V1X, BZX84-C5V1 trades accuracy for cost in non-critical references, while MMSZ5231B offers identical electrical specs in a physically larger, thermally more robust package-making BZX84W-B5V1X optimal for space-constrained, high-accuracy shunt regulation.
Availability
BZX84W-B5V1X is available at Aetrix Electronics and suitable for power supply feedback reference, microcontroller reset circuit, and ESD-clamped signal conditioning requiring stable component supply across industrial, automotive (non-safety), and consumer electronics programs.
Supply support for BZX84W-B5V1X 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 solutions with focus on efficiency, miniaturization, and sustainability.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, high-frequency voltage regulation and protection in space-constrained portable and industrial electronics.
FAQ
What is the maximum continuous reverse current the BZX84W-B5V1X can sustain?
The device has no specified maximum continuous reverse current; instead, its safe operating limit is governed by total power dissipation. At 5.1 V Zener voltage, the maximum sustainable DC reverse current is 54 mA (275 mW ÷ 5.1 V), assuming 25 °C ambient and FR4 PCB mounting per datasheet conditions.
Can BZX84W-B5V1X be used in place of a 5.1 V Zener in an existing SOD-323 design?
No-BZX84W-B5V1X uses SOT323 (SC-70) package, which has different dimensions (1.35 × 1.75 mm) and pin spacing (0.65 mm) than SOD-323 (1.7 × 1.25 mm, 1.3 mm pitch). Direct substitution requires PCB footprint redesign and solder mask adjustment per Nexperia's reflow land pattern guidelines.
How does the −0.8 mV/K temperature coefficient affect long-term stability?
This coefficient means VZ decreases by 0.8 mV per Kelvin rise in junction temperature. Over a 100 °C junction swing (e.g., −25 °C to +75 °C), VZ shifts by −80 mV-within the ±2 % initial tolerance band (±102 mV), ensuring monotonic, predictable drift without inversion or hysteresis.
Is BZX84W-B5V1X qualified for automotive applications?
No-this part is explicitly marked "non-automotive qualified" in the revision history. It lacks AEC-Q200 stress testing and automotive-grade process controls. For automotive use, Nexperia offers the BZX84W-Q series (e.g., BZX84W-QB5V1) with full qualification and extended temperature screening.
BZX84W-B5V1X 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):
- 5.1 V
- Tolerance:
- ±2%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B5V1X FAQ
1.How can I place an order for BZX84W-B5V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B5V1X 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-B5V1X reliable?
The price and inventory of BZX84W-B5V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B5V1X is usually 5 days.
3.What payment methods are accepted for BZX84W-B5V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B5V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B5V1X?
BZX84W-B5V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B5V1X 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-B5V1X?
For technical support, including BZX84W-B5V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B5V1X requirements.
6.How does Aetrix verify that BZX84W-B5V1X is sourced from the original manufacturer or authorized distributors?
All BZX84W-B5V1X 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-B5V1X meets industry standards.
7.What is the process for return or replacement of BZX84W-B5V1X?
All BZX84W-B5V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B5V1X, 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-B5V1X part is unused and in its original packaging.
Return procedure for BZX84W-B5V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B5V1X 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
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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