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

Nexperia USA Inc. BZX84-B8V2,235

Name: BZX84-B8V2,235
Brand: Nexperia USA Inc.
SKU: BZX84-B8V2,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B8V2,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84-B8V2,235.pdf

Description:: DIODE ZENER 8.2V 250MW TO236AB

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Inventory:10,000

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Product details

Overview

BZX84-B8V2,235 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in space-constrained PCBs. It delivers 8.2 V nominal breakdown voltage at 5 mA, with 80 Ω typical differential resistance, 0.7 μA reverse current at 6.56 V, and operates across –55 °C to +150 °C ambient.

For engineers reviewing the BZX84-B8V2,235 datasheet, BZX84-B8V2,235 pinout, BZX84-B8V2,235 application, or BZX84-B8V2,235 equivalent, this part serves as a stable, surface-mount Zener reference for power supply feedback, overvoltage protection, and analog signal conditioning where ±2 % regulation accuracy and 250 mW dissipation are required.

Technical Context

This device functions as a two-terminal silicon Zener diode operating in reverse breakdown mode, with a specified 8.2 V nominal Zener voltage (V_Z) at I_Z = 5 mA and temperature coefficient of +3.2 mV/K. Its low 80 Ω differential resistance ensures minimal output voltage variation under load changes.

Designed for DC and low-frequency regulation, it supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), while maintaining thermal resistance of 330 K/W from junction to solder point-critical for reliability in thermally dense layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	8.04 V to 8.36 V at I_Z = 5 mA - defines precise regulation window for feedback loops
Differential Resistance r_dif	80 Ω max - limits output voltage drift under varying load current
Reverse Current I_R	0.7 μA max at V_R = 6.56 V - ensures low leakage in standby or high-impedance bias networks
Total Power Dissipation P_tot	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Junction Temperature T_j	–55 °C to +150 °C - enables operation in industrial and automotive-adjacent environments
Thermal Resistance R_th(j-sp)	330 K/W - quantifies thermal path efficiency from die to cathode solder joint
Non-repetitive Peak Power	40 W (100 μs pulse) - supports transient overvoltage clamping without failure

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with 1.9 mm × 1.3 mm footprint and 1.1 mm height; optimized for reflow and wave soldering per IPC-7351B.

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.)	Internal die pad with no electrical connection-must be left floating or grounded per layout best practice
3	Cathode (K)	Reverse-biased terminal; connects to regulated output or clamping node

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables tighter regulation than ±5 % variants-reduces need for post-regulation trimming in mid-accuracy supplies
250 mW total power rating	Supports continuous operation in compact 3.3 V/5 V rail monitors and sensor bias circuits without heatsinking
Low 80 Ω differential resistance	Maintains <±10 mV output shift across 1–10 mA load range-critical for ADC reference stability
+3.2 mV/K temperature coefficient	Provides predictable, positive V_Z drift-facilitates compensation in temperature-sensitive analog stages
SOT23 package compatibility	Enables automated placement and reflow on high-density boards; footprint matches industry-standard 0805-sized footprints

Applications

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage of a buck converter using TL431-like feedback topology with discrete Zener reference.

IC Role / Device Role / Timing Role: Provides stable 8.2 V reference for error amplifier input, replacing higher-cost shunt regulators.

Use Value: Delivers ±2 % accuracy without external trimming, reducing BOM count and calibration steps in cost-sensitive AC/DC adapters.

Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 6 V.

IC Role / Device Role / Timing Role: Acts as bidirectional clamp-Zener breakdown absorbs positive surges; forward conduction limits negative excursions.

Use Value: Limits pin voltage to ≤8.36 V during 40 W pulses, preventing latch-up while consuming no quiescent current in normal operation.

Reference Voltage Source

Signal Level Shifting

Use Scenario: Generating a stable 8.2 V bias for op-amp comparators in battery-powered sensor interfaces.

IC Role / Device Role / Timing Role: Supplies fixed reference to comparator non-inverting input, enabling threshold detection independent of supply rail variation.

Use Value: Maintains <±0.1 V drift over –40 °C to +85 °C due to predictable +3.2 mV/K coefficient-enabling single-point calibration.

Use Scenario: Translating a 0–5 V DAC output to 0–8.2 V range for driving legacy analog actuators.

IC Role / Device Role / Timing Role: Functions as passive level shifter via series resistor + Zener clamp, establishing upper rail at V_Z.

Use Value: Achieves accurate 8.2 V ceiling with <1 % error at 1 mA load-eliminating need for active buffer in low-bandwidth control paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5231BS-7-F	8.2 V ±5 %, 225 mW, 100 Ω r_dif, SOT23	Looser tolerance and higher impedance reduce regulation precision in feedback loops	Select when cost sensitivity outweighs ±2 % accuracy requirement and thermal margin exceeds 330 K/W
Vishay BZX84-C8V2-7-F	8.2 V ±5 %, 250 mW, 80 Ω r_dif, SOT23	Same package and power rating but wider tolerance increases risk of out-of-spec output in closed-loop systems	Choose only for non-critical clamping where ±5 % V_Z variation is acceptable and thermal design matches 330 K/W path

Compared with BZX84-B8V2,235, the MMBZ5231BS-7-F trades accuracy for cost and the BZX84-C8V2-7-F retains power capability but sacrifices regulation tightness-making the BZX84-B8V2,235 optimal for designs requiring both 2 % tolerance and low dynamic impedance in SOT23 form factor.

Availability

BZX84-B8V2,235 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and reference voltage source applications requiring stable component supply, consistent parametric performance, and long-term SMT manufacturing support.

Supply support for BZX84-B8V2,235 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 logic, analog, and discrete components with focus on efficiency, reliability, and miniaturization for industrial, computing, and consumer markets.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage regulation and clamping in space-constrained, thermally demanding PCB environments.

FAQ

What is the maximum continuous reverse current the BZX84-B8V2,235 can sustain without degradation?

The device has no defined maximum continuous reverse current-its safe operating limit is governed by power dissipation. At 25 °C ambient on a standard FR4 PCB, it sustains up to 30.5 mA continuously (250 mW ÷ 8.2 V) before exceeding P_tot. Derating is required above 25 °C per the 500 K/W junction-to-ambient thermal resistance.

Can BZX84-B8V2,235 be used in place of a 7.5 V Zener for improved noise immunity?

No-it is not a drop-in replacement. Its 8.04–8.36 V breakdown range exceeds 7.5 V by >6 %, which would raise regulated output voltage and potentially violate downstream IC absolute maximum ratings. Use BZX84-B7V5 for 7.5 V applications.

Does the n.c. pin (Pin 2) require grounding or thermal relief in PCB layout?

Pin 2 is internally unconnected and must remain electrically floating. Grounding it introduces parasitic capacitance and potential leakage paths. Thermal relief is unnecessary-no heat path exists-but avoid copper pours directly under Pin 2 to prevent solder wicking during reflow.

How does the +3.2 mV/K temperature coefficient affect long-term voltage reference stability?

This coefficient causes V_Z to increase by ~0.26 V over a 80 °C rise (e.g., –40 °C to +40 °C), resulting in ~3.2 % relative drift. For high-stability references, pair with a negative-TC component (e.g., silicon diode) or use in compensated circuits-do not rely on it for <±0.5 % drift budgets.

BZX84-B8V2,235 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX84

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 8.2 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 700 nA @ 5 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-B8V2,235 FAQ

1.How can I place an order for BZX84-B8V2,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B8V2,235 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-B8V2,235 reliable?

The price and inventory of BZX84-B8V2,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B8V2,235 is usually 5 days.

3.What payment methods are accepted for BZX84-B8V2,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B8V2,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B8V2,235?

BZX84-B8V2,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B8V2,235 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-B8V2,235?

For technical support, including BZX84-B8V2,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B8V2,235 requirements.

6.How does Aetrix verify that BZX84-B8V2,235 is sourced from the original manufacturer or authorized distributors?

All BZX84-B8V2,235 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-B8V2,235 meets industry standards.

7.What is the process for return or replacement of BZX84-B8V2,235?

All BZX84-B8V2,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B8V2,235, 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-B8V2,235 part is unused and in its original packaging.

Return procedure for BZX84-B8V2,235:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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