Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX84-B5V1/DG/B3,2

Name: BZX84-B5V1/DG/B3,2
Brand: Nexperia USA Inc.
SKU: BZX84-B5V1/DG/B3,2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

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:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,038

Please send an inquiry. Send us your inquiry, and we will respond immediately.

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 regulation in low-power sensor biasing circuits.

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 thermal performance in space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage across varying load and supply conditions. Its 5.1 V nominal Zener voltage is specified at test current of 5 mA, with dynamic impedance of 60 Ω ensuring minimal output variation under current transients.

The device features a negative temperature coefficient of −2.5 mV/K, enabling predictable drift compensation in multi-device reference networks. It complies with AEC-Q200 Grade 3 for automotive ambient temperature operation (−40 °C to +125 °C).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.1 V ±2% at I_Z = 5 mA - ensures tight regulation window for 3.3 V/5 V rail monitoring
Power Dissipation (P_tot)	250 mW at T_amb = 25 °C - limits continuous current to ~49 mA without derating
Dynamic Impedance (Z_ZT)	60 Ω at I_Z = 5 mA - maintains <±30 mV output shift for ±1.8 mA load changes
Reverse Leakage (I_R)	500 nA at V_R = 1 V - avoids parasitic current paths in high-impedance analog front-ends
Temperature Coefficient	−2.5 mV/K - enables predictable offset correction in temperature-compensated references
Forward Voltage (V_F)	700 mV at I_F = 10 mA - supports bidirectional clamping when used with series resistor

Pinout & Package

Package: SOT-23 (TO-236AB), 3-pin plastic surface-mount package with standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per Nexperia SOT-23 mechanical drawing SOT23.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to lower-potential node; reverse-biased during regulation
Pin 2	Cathode	Connected to regulated output node; carries full Zener current
Pin 3	NC	No internal connection; electrically isolated for thermal relief and layout flexibility

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Reduces need for post-assembly calibration in voltage reference designs
AEC-Q200 Grade 3 qualified	Validates reliability for under-hood automotive modules operating up to +125 °C
Low dynamic impedance (60 Ω)	Minimizes output voltage ripple in battery-powered sensor signal conditioning
SOT-23 footprint compatibility	Enables drop-in replacement for legacy 5.1 V Zeners without PCB redesign

Applications

Industrial Sensor Biasing

USB Port Overvoltage Clamp

Use Scenario: Providing stable 5.1 V reference for bridge sensor excitation in factory-floor pressure transducers.

IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference with fixed breakdown threshold.

Use Value: Enables 0.1% full-scale accuracy over −25 °C to +85 °C without trimming resistors.

Use Scenario: Clamping transient overvoltage on USB D+ line during hot-plug events.

IC Role / Device Role / Timing Role: Bidirectional ESD protection element leveraging forward conduction and reverse Zener action.

Use Value: Limits peak line voltage to 5.8 V (5.1 V + 0.7 V) while surviving 8 kV HBM ESD pulses.

Automotive Cabin Controller Reference

IoT Node Battery Monitor Threshold

Use Scenario: Generating precise 5.1 V reference for ADC input scaling in HVAC control modules.

IC Role / Device Role / Timing Role: Shunt regulator establishing known voltage for ratiometric measurement.

Use Value: Maintains <±0.5% reference stability across 12 V battery variations (9–16 V) and temperature cycling.

Use Scenario: Detecting end-of-charge condition via comparator trip point in Li-ion battery management.

IC Role / Device Role / Timing Role: Voltage threshold detector defining 3.0 V cutoff using resistor divider + Zener clamp.

Use Value: Achieves ±20 mV trip accuracy with 100 ppm/°C effective TC after divider ratio optimization.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ5231B-7-F	Same 5.1 V rating but ±5% tolerance and 500 mW P_tot	Higher power allows larger current drive but looser voltage accuracy	Select when higher current capability outweighs regulation precision
BZX84-C5V1,215	Same SOT-23 package and ±5% tolerance; no AEC-Q200 qualification	Lacks automotive-grade reliability validation and tighter TC spec	Select for cost-sensitive consumer applications where Grade 3 qualification is unnecessary

Compared with MMSZ5231B-7-F and BZX84-C5V1,215, the BZX84-B5V1/DG/B3,2 delivers superior voltage accuracy and automotive qualification at identical footprint-critical for safety-critical sensor references where ±2% tolerance directly impacts measurement integrity.

Availability

BZX84-B5V1/DG/B3,2 is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port protection, and automotive cabin controller reference applications requiring stable component supply and long-term lifecycle assurance.

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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in space-constrained, thermally demanding applications.

FAQ

What is the maximum continuous Zener current for BZX84-B5V1/DG/B3,2 at 85 °C ambient?

At 85 °C ambient, the device's power derating reduces its usable dissipation to 150 mW. With a 5.1 V Zener voltage, this limits continuous Zener current to approximately 29 mA (150 mW ÷ 5.1 V), assuming no additional PCB copper area for heat spreading.

Does BZX84-B5V1/DG/B3,2 support bidirectional ESD protection?

Yes - the device conducts in forward bias (V_F ≈ 700 mV at 10 mA) and reverse breakdown (5.1 V), enabling symmetrical clamping of ±6 V transients when paired with a series current-limiting resistor in signal line protection.

How does the −2.5 mV/K temperature coefficient impact reference stability?

The negative TC causes output voltage to decrease by 2.5 mV per degree Celsius rise. In a 5.1 V reference, this yields −490 ppm/°C drift - acceptable for non-precision applications but requires compensation in high-accuracy systems using matched diodes or TC-aware divider design.

Is the NC pin (Pin 3) required to be grounded or left floating in layout?

Pin 3 is internally unconnected and must be left floating. Grounding it provides no electrical benefit and may compromise thermal performance by unintentionally creating a heat path that alters local junction temperature during regulation.

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.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…