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

Nexperia USA Inc. BZX84-B10/DG/B4R

Name: BZX84-B10/DG/B4R
Brand: Nexperia USA Inc.
SKU: BZX84-B10/DG/B4R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B10/DG/B4R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-B10/DG/B4R.pdf

Description:: DIODE ZENER 10V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BZX84-B10/DG/B4R from Nexperia is a 10 V, 250 mW surface-mount Zener diode in SOT23 package with ±2% tolerance, 100 nA maximum leakage at 7.5 V, and 15 Ω dynamic impedance, used for precision voltage regulation in low-power sensor biasing circuits.

For engineers reviewing the BZX84-B10/DG/B4R datasheet, BZX84-B10/DG/B4R pinout, BZX84-B10/DG/B4R application, or BZX84-B10/DG/B4R equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, temperature coefficient, and SOT23 thermal performance in space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across its anode-cathode terminals. Its 10 V nominal Zener voltage is specified at test current of 5 mA, with temperature coefficient of +5.2 mV/K ensuring predictable drift over −65 °C to +150 °C operating range.

The device uses planar epitaxial process for consistent junction characteristics and low noise performance. Its 250 mW power rating defines maximum continuous dissipation under derated conditions, requiring PCB copper area consideration for thermal management in sustained operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10 V ±2% at I_Z = 5 mA - sets precise reference level for analog front-ends
Power Dissipation (P_tot)	250 mW - limits maximum steady-state current to ~25 mA at 10 V
Dynamic Impedance (Z_Z)	15 Ω max at I_Z = 5 mA - determines output voltage stability under load variation
Reverse Leakage (I_R)	100 nA max at V_R = 7.5 V - ensures minimal error current in high-impedance reference nodes
Temperature Coefficient	+5.2 mV/K - quantifies voltage drift per degree Celsius rise above 25 °C
Package	SOT23 - enables 0.95 mm pitch assembly and 125 °C junction temperature capability

Pinout & Package

SOT23-3 package with standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC). The cathode band marks terminal polarity for correct orientation during placement.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Reverse-biased input	Connected to lower potential node; current flows into cathode when V_AK < −10 V
Pin 2 (Cathode)	Reference output	Provides regulated 10 V relative to anode; marked by cathode band on package
Pin 3 (NC)	No internal connection	Electrically isolated; must remain unconnected to avoid parasitic coupling

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Reduces calibration overhead in 10 V reference designs without trimming resistors
Low 100 nA leakage at 7.5 V	Minimizes error in high-impedance voltage divider networks feeding ADC inputs
15 Ω dynamic impedance	Enables <10 mV output shift for ±1 mA load current changes in feedback loops
SOT23 footprint compatibility	Allows direct replacement of BZX84-C10 and similar 3-pin Zeners without layout change

Applications

Industrial Sensor Biasing

Portable Instrument Reference

Use Scenario: Providing stable excitation voltage to bridge-based pressure sensors in factory automation modules.

IC Role / Device Role / Timing Role: Zener diode acting as two-terminal shunt voltage reference.

Use Value: ±2% tolerance eliminates need for post-calibration trim pots in production test flow.

Use Scenario: Generating 10 V reference for 12-bit SAR ADC in handheld multimeters.

IC Role / Device Role / Timing Role: Precision voltage reference source for analog-to-digital conversion.

Use Value: 100 nA leakage prevents loading of RC filter networks preceding ADC sample-and-hold stage.

Automotive Cabin Control

IoT Node Power Management

Use Scenario: Regulating supply to microcontroller reset circuitry in HVAC control units.

IC Role / Device Role / Timing Role: Shunt regulator maintaining clean 10 V rail despite battery voltage fluctuations.

Use Value: 15 Ω dynamic impedance ensures reset threshold remains within ±50 mV across 0–20 mA load transients.

Use Scenario: Setting threshold for Li-ion battery undervoltage lockout in BLE sensor nodes.

IC Role / Device Role / Timing Role: Voltage reference for comparator-based battery monitoring circuit.

Use Value: +5.2 mV/K temperature coefficient allows accurate compensation of battery voltage drift over −20 °C to +70 °C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C10,115	±5% tolerance vs. ±2%; same SOT23 package and 250 mW rating	Higher voltage variation acceptable in non-critical biasing where cost is primary driver	Select when absolute accuracy is secondary to unit cost reduction in high-volume consumer products
MMSZ5240B-TP	10 V ±5%, 500 mW rating, SOD-123 package	Higher power handling but larger footprint; requires PCB redesign	Choose when thermal margin is insufficient with 250 mW limit and board space permits SOD-123 placement

Compared with BZX84-C10 and MMSZ5240B, BZX84-B10/DG/B4R delivers tighter voltage tolerance in the same compact SOT23 footprint-critical for space-constrained, high-accuracy analog signal chains where calibration time and component count must be minimized.

Availability

BZX84-B10/DG/B4R is available at Aetrix Electronics and suitable for industrial sensor biasing, portable instrument reference, automotive cabin control, and IoT node power management requiring stable component supply and traceable sourcing.

Supply support for BZX84-B10/DG/B4R 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, with manufacturing sites in Europe, Asia, and the US.

This part belongs to the BZX84 series of precision Zener diodes designed specifically for voltage regulation and reference applications in space-sensitive, low-power electronic systems.

FAQ

What is the maximum reverse current before breakdown for BZX84-B10/DG/B4R?

The device exhibits less than 100 nA reverse leakage at 7.5 V, and measurable Zener conduction begins near 9.5 V. At 9.8 V, typical reverse current is 1 µA; full regulation at 10 V occurs at the test current of 5 mA as defined in the Nexperia datasheet.

Can BZX84-B10/DG/B4R replace BZX84-C10 in existing designs?

Yes-both share identical SOT23-3 package, pinout, and thermal characteristics. The primary difference is tighter ±2% voltage tolerance versus ±5%, enabling direct substitution where improved accuracy is beneficial without layout or thermal changes.

What is the thermal resistance junction-to-ambient for this Zener diode?

Nexperia specifies R_thJA = 430 K/W for the SOT23 package on standard FR-4 PCB with minimal copper. With 250 mW power dissipation, this yields up to 107.5 K temperature rise above ambient-requiring derating above 70 °C ambient per the datasheet's thermal curves.

Does this Zener diode require a series current-limiting resistor in all applications?

Yes-operation requires external current limiting to prevent exceeding 250 mW dissipation. For example, at 15 V supply, a minimum 200 Ω resistor limits current to 5 mA; lower resistance risks thermal runaway due to positive temperature coefficient above 5 mA.

BZX84-B10/DG/B4R 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:: Active

Voltage - Zener (Nom) (Vz):: 10 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 200 nA @ 7 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-B10/DG/B4R FAQ

1.How can I place an order for BZX84-B10/DG/B4R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B10/DG/B4R 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-B10/DG/B4R reliable?

The price and inventory of BZX84-B10/DG/B4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B10/DG/B4R is usually 5 days.

3.What payment methods are accepted for BZX84-B10/DG/B4R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B10/DG/B4R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B10/DG/B4R?

BZX84-B10/DG/B4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B10/DG/B4R 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-B10/DG/B4R?

For technical support, including BZX84-B10/DG/B4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B10/DG/B4R requirements.

6.How does Aetrix verify that BZX84-B10/DG/B4R is sourced from the original manufacturer or authorized distributors?

All BZX84-B10/DG/B4R 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-B10/DG/B4R meets industry standards.

7.What is the process for return or replacement of BZX84-B10/DG/B4R?

All BZX84-B10/DG/B4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B10/DG/B4R, 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-B10/DG/B4R part is unused and in its original packaging.

Return procedure for BZX84-B10/DG/B4R:

1.Submit a request within 90 days.

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

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