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Nexperia USA Inc. BZX84-B5V1/DG/B3:2
- Part No.:
- BZX84-B5V1/DG/B3:2
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B5V1/DG/B3:2.pdf
- Description:
- DIODE ZENER 5.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,336
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Product details
Overview
BZX84-B5V1/DG/B3:2 from Nexperia is a 5.1 V, 250 mW surface-mount Zener diode in SOT-23 package with ±2% tolerance, 700 mV forward voltage at 10 mA, and 500 nA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in low-power sensor interfaces.
For engineers reviewing the BZX84-B5V1/DG/B3:2 datasheet, BZX84-B5V1/DG/B3:2 pinout, BZX84-B5V1/DG/B3:2 application, or BZX84-B5V1/DG/B3:2 equivalent, key selection criteria include Zener voltage tolerance, power dissipation limit, dynamic impedance, temperature coefficient, and SOT-23 terminal configuration for PCB layout compatibility.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and supply conditions. It features a nominal Zener voltage of 5.1 V with tight ±2% initial tolerance and a temperature coefficient of ±0.05%/°C over −65 °C to +150 °C.
Designed for low-current regulation, it delivers 5.1 V at test current IZT = 5 mA, with dynamic impedance of 90 Ω max at IZT, and supports continuous reverse power dissipation up to 250 mW at Tamb = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±2% - defines precise clamping threshold for voltage-sensitive circuits |
| Power Dissipation (Ptot) | 250 mW - sets maximum continuous reverse power handling at 25 °C ambient |
| Dynamic Impedance (ZZT) | ≤90 Ω at 5 mA - determines voltage regulation stability under small-signal load variation |
| Reverse Leakage (IR) | 500 nA at 1 V - ensures minimal quiescent current draw in standby mode |
| Forward Voltage (VF) | 700 mV at 10 mA - enables use as low-drop rectifier or ESD clamp in bidirectional paths |
| Temperature Coefficient | ±0.05 %/°C - guarantees <±0.5% VZ drift over full industrial temperature range |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with standard pin assignment: Anode (Pin 1), Cathode (Pin 2), and unused terminal (Pin 3) - Pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| Pin 2 | Cathode | Connected to higher-potential node; defines Zener voltage drop direction |
| Pin 3 | NC | No internal connection; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2% ensures accurate reference without post-production trimming |
| Low dynamic impedance | ≤90 Ω maintains stable output under 1–10 mA load shifts |
| Low leakage current | 500 nA at 1 V minimizes battery drain in always-on monitoring circuits |
| SOT-23 footprint | Enables high-density placement on compact PCBs with standard reflow profiles |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Protecting 5 V analog front-end inputs of pressure and temperature sensors against transient surges. IC Role / Device Role / Timing Role: Zener clamping element placed between signal line and ground to shunt excess energy above 5.1 V. Use Value: Limits input voltage excursion to within ±2% of 5 V, preserving ADC accuracy and preventing op-amp saturation. | Use Scenario: Safeguarding USB 2.0 data lines and VBUS rail from ESD events and hot-plug overshoot. IC Role / Device Role / Timing Role: Bidirectional transient suppressor configured with cathode tied to VBUS and anode to ground. Use Value: Clamps transients to ≤5.1 V within nanoseconds while drawing <500 nA leakage during normal operation. |
| Low-Power Microcontroller Reset Circuit | Reference Voltage for ADC Calibration |
Use Scenario: Generating clean, stable reset threshold for 3.3 V MCUs operating in wide-temperature environments. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding comparator input to trigger reset below valid supply level. Use Value: Delivers ±0.05%/°C drift compensation, enabling reliable reset assertion from −40 °C to +85 °C. | Use Scenario: Providing stable 5.1 V reference for 12-bit SAR ADCs in portable medical devices. IC Role / Device Role / Timing Role: Precision shunt reference connected directly to ADC REF+ pin with bypass capacitor. Use Value: Enables <±1 LSB integral nonlinearity error by maintaining voltage stability under 100 µA load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1,115 (Nexperia) | ±5% tolerance vs. ±2%; same SOT-23 package and 250 mW rating | Acceptable where cost sensitivity outweighs precision requirement | Select when ±5% VZ drift is acceptable for non-critical biasing |
| MMSZ5231B-TP (Micro Commercial Components) | Same 5.1 V ±5%, but 500 mW Ptot and SOD-123 package | Higher power handling; larger footprint limits high-density designs | Choose for higher surge immunity where board space permits larger package |
Compared with BZX84-C5V1,115 and MMSZ5231B-TP, the BZX84-B5V1/DG/B3:2 offers superior voltage accuracy and compact SOT-23 integration-critical for space-constrained, precision-referenced systems where ±2% tolerance directly impacts measurement fidelity.
Availability
BZX84-B5V1/DG/B3:2 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, microcontroller reset circuits, and ADC reference applications requiring stable component supply and guaranteed long-term sourcing.
Supply support for BZX84-B5V1/DG/B3:2 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage referencing and low-power overvoltage protection in space-constrained, thermally demanding applications.
FAQ
What is the maximum reverse power dissipation for BZX84-B5V1/DG/B3:2?
The BZX84-B5V1/DG/B3:2 has a total power dissipation rating of 250 mW at ambient temperature of 25 °C. Derating is required above this temperature at 2.0 mW/K, reaching zero dissipation at 150 °C junction temperature. This limit applies strictly to continuous reverse-bias operation.
Is Pin 3 of the SOT-23 package electrically connected?
No, Pin 3 is not internally connected to any semiconductor die structure. It is a mechanically formed lead with no electrical function. Layout guidelines recommend leaving it unconnected or grounding it only if required for mechanical stability-no current path exists through this terminal.
How does the ±2% Zener voltage tolerance impact ADC reference accuracy?
A ±2% tolerance on the 5.1 V Zener introduces ±102 mV absolute error in the reference voltage. For a 12-bit ADC with 5 V full-scale range, this corresponds to ±8.3 LSB error-directly limiting achievable end-point accuracy unless calibrated out in firmware or hardware.
Can BZX84-B5V1/DG/B3:2 be used in forward conduction mode?
Yes-it exhibits a typical forward voltage of 700 mV at 10 mA, making it usable as a low-VF clamp or level-shifter in bidirectional signal paths. However, its forward current rating is limited to 200 mA peak, and sustained forward conduction exceeds its thermal design envelope beyond brief pulses.
BZX84-B5V1/DG/B3:2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B5V1/DG/B3:2 FAQ
1.How can I place an order for BZX84-B5V1/DG/B3:2 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B5V1/DG/B3:2 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 BZX84-B5V1/DG/B3:2 reliable?
The price and inventory of BZX84-B5V1/DG/B3:2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B5V1/DG/B3:2 is usually 5 days.
3.What payment methods are accepted for BZX84-B5V1/DG/B3:2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B5V1/DG/B3:2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B5V1/DG/B3:2?
BZX84-B5V1/DG/B3:2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B5V1/DG/B3:2 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 BZX84-B5V1/DG/B3:2?
For technical support, including BZX84-B5V1/DG/B3:2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B5V1/DG/B3:2 requirements.
6.How does Aetrix verify that BZX84-B5V1/DG/B3:2 is sourced from the original manufacturer or authorized distributors?
All BZX84-B5V1/DG/B3:2 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 BZX84-B5V1/DG/B3:2 meets industry standards.
7.What is the process for return or replacement of BZX84-B5V1/DG/B3:2?
All BZX84-B5V1/DG/B3:2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B5V1/DG/B3:2, 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 BZX84-B5V1/DG/B3:2 part is unused and in its original packaging.
Return procedure for BZX84-B5V1/DG/B3:2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B5V1/DG/B3:2 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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