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

Nexperia USA Inc. BZX84-B9V1/DG/B3,2

Name: BZX84-B9V1/DG/B3,2
Brand: Nexperia USA Inc.
SKU: BZX84-B9V1/DG/B3,2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B9V1/DG/B3,2

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-B9V1/DG/B3,2.pdf

Description:: DIODE ZENER 9.1V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,864

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Product details

Overview

BZX84-B9V1/DG/B3,2 from Nexperia is a 9.1 V ±2% tolerance Zener diode in SOT-23 package, rated for 300 mW power dissipation, with 5 µA maximum reverse leakage at 7.3 V and 100 Ω typical dynamic impedance, used for voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84-B9V1/DG/B3,2 datasheet, BZX84-B9V1/DG/B3,2 pinout, BZX84-B9V1/DG/B3,2 application, or BZX84-B9V1/DG/B3,2 equivalent, key selection criteria include Zener voltage tolerance, power rating, dynamic impedance, reverse leakage, and SOT-23 thermal performance in space-constrained biasing and protection designs.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying current conditions. It is characterized by tight 2% voltage tolerance (9.1 V nominal), low dynamic impedance (100 Ω typ.), and guaranteed reverse leakage ≤5 µA at 7.3 V - enabling precise DC biasing and reference stability in low-current signal chains.

The device complies with AEC-Q200 Grade 1 requirements and supports operation from −65 °C to +150 °C. Its SOT-23 package provides surface-mount compatibility with JEDEC-standard footprint and thermal resistance of 400 K/W junction-to-ambient (free air).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.1 V ±2% - ensures stable reference within ±0.182 V over temperature and current variation
Power Dissipation (P_tot)	300 mW - limits maximum continuous operating current to ~33 mA at 9.1 V
Dynamic Impedance (Z_ZT)	100 Ω typ. at I_Z = 5 mA - determines output voltage deviation under load transients
Reverse Leakage (I_R)	≤5 µA at 7.3 V - minimizes parasitic current draw in high-impedance reference nodes
Operating Temperature	−65 °C to +150 °C - supports automotive under-hood and industrial ambient environments
Package	SOT-23 - enables automated placement and 0.65 mm pitch PCB routing

Pinout & Package

SOT-23 package with standard three-terminal configuration: 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 regulated output voltage node
Pin 3	No Connect (NC)	Internally unconnected; must remain floating or grounded per layout best practice

Key Features

Feature	Design Value
Tight voltage tolerance	±2% at 9.1 V enables accurate reference without post-calibration in sensor front-ends
AEC-Q200 qualified	Grade 1 qualification confirms reliability for automotive body electronics and infotainment power rails
Low dynamic impedance	100 Ω typ. maintains <±10 mV regulation error under ±1 mA load shifts
SOT-23 thermal resistance	400 K/W (free air) allows sustained 300 mW operation with minimal board-level heatsinking

Applications

Automotive Sensor Biasing

Industrial Analog Reference

Use Scenario: Providing stable 9.1 V bias to MEMS pressure sensor bridge amplifiers in engine control modules.

IC Role / Device Role / Timing Role: Zener voltage reference establishing precision excitation voltage for ratiometric measurement.

Use Value: ±2% tolerance and low leakage ensure <0.5% full-scale error contribution across −40 °C to +125 °C.

Use Scenario: Generating local reference for 12-bit ADCs in programmable logic controller analog input modules.

IC Role / Device Role / Timing Role: Passive voltage reference source for ADC reference divider networks.

Use Value: 100 Ω dynamic impedance limits reference drift to <2 LSB under 500 µA load variation.

Consumer Power Management

Medical Instrumentation

Use Scenario: Regulating auxiliary 9 V rail for op-amp biasing in battery-powered portable audio codecs.

IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining clean supply for analog signal path.

Use Value: 5 µA max reverse leakage extends battery life by reducing quiescent current in sleep mode.

Use Scenario: Stabilizing reference voltage for ECG front-end instrumentation amplifiers.

IC Role / Device Role / Timing Role: Precision DC reference ensuring baseline stability in low-noise biopotential acquisition.

Use Value: AEC-Q200 Grade 1 qualification validates long-term parametric stability required for Class II medical devices.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ5240B-TP (Micro Commercial)	9.1 V ±5% tolerance, 500 mW rating, 150 Ω Z_ZT	Higher power margin but looser voltage accuracy	Preferred where thermal headroom > voltage precision
BZX84-C9V1 (Nexperia)	9.1 V ±5% tolerance, same SOT-23 package and 300 mW rating	Relaxed tolerance reduces cost; identical footprint and thermal behavior	Selected when ±5% regulation suffices and cost sensitivity is high

Compared with BZX84-B9V1/DG/B3,2, MMSZ5240B-TP offers higher power handling but sacrifices voltage accuracy and dynamic impedance; BZX84-C9V1 retains identical form-factor and thermal performance while trading ±2% tolerance for lower unit cost in non-critical references.

Availability

BZX84-B9V1/DG/B3,2 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference design, and medical instrumentation requiring stable component supply with AEC-Q200 compliance and tight voltage tolerance.

Supply support for BZX84-B9V1/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 scalable manufacturing and AEC-Q200 leadership.

This part belongs to the BZX84 series of precision Zener diodes designed specifically for stable voltage reference and regulation in space-constrained, thermally demanding applications where ±2% tolerance and low dynamic impedance are critical.

FAQ

What is the maximum reverse current before breakdown for BZX84-B9V1/DG/B3,2?

The device exhibits gradual reverse conduction below 7.3 V, with ≤5 µA leakage specified at that voltage. Breakdown is defined at test current I_Z = 5 mA, where V_Z = 9.1 V ±2%. No maximum pre-breakdown current is specified - only leakage compliance at sub-Zener voltages.

Can BZX84-B9V1/DG/B3,2 be used in parallel for higher power dissipation?

No - Zener diodes exhibit negative temperature coefficient and parameter spread; paralleling causes current imbalance and thermal runaway. For higher power, use a single higher-rated device like PZM10A or select a TO-220 packaged alternative with matched characteristics.

Is pin 3 (SOT-23) electrically connected internally?

No - pin 3 is a no-connect (NC) terminal in the BZX84-B9V1/DG/B3,2. It is internally unconnected and must remain floating or tied to ground only if required for mechanical stability or EMI suppression, per PCB layout guidelines.

Does this Zener diode support bidirectional transient suppression?

No - it is a unidirectional Zener diode optimized for reverse-bias regulation. It does not meet IEC 61000-4-2 ESD or IEC 61000-4-4 EFT specifications for transient suppression. For bidirectional protection, use dedicated TVS arrays such as PESD5V0S1BA.

BZX84-B9V1/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):: 9.1 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 6 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-B9V1/DG/B3,2 FAQ

1.How can I place an order for BZX84-B9V1/DG/B3,2 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B9V1/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-B9V1/DG/B3,2 reliable?

The price and inventory of BZX84-B9V1/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-B9V1/DG/B3,2 is usually 5 days.

3.What payment methods are accepted for BZX84-B9V1/DG/B3,2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B9V1/DG/B3,2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B9V1/DG/B3,2?

BZX84-B9V1/DG/B3,2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B9V1/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-B9V1/DG/B3,2?

For technical support, including BZX84-B9V1/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-B9V1/DG/B3,2 requirements.

6.How does Aetrix verify that BZX84-B9V1/DG/B3,2 is sourced from the original manufacturer or authorized distributors?

All BZX84-B9V1/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-B9V1/DG/B3,2 meets industry standards.

7.What is the process for return or replacement of BZX84-B9V1/DG/B3,2?

All BZX84-B9V1/DG/B3,2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B9V1/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-B9V1/DG/B3,2 part is unused and in its original packaging.

Return procedure for BZX84-B9V1/DG/B3,2:

1.Submit a request within 90 days.

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

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