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

onsemi BZX84B9V1LT1G

Name: BZX84B9V1LT1G
Brand: onsemi
SKU: BZX84B9V1LT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX84B9V1LT1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: BZX84B9V1LT1G.pdf

Description:: DIODE ZENER 9.1V 250MW SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:23,559

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

Product details

Overview

BZX84B9V1LT1G from onsemi is a tight-tolerance Zener diode in SOT-23 package, providing precise 9.1 V reverse breakdown voltage at 5 mA test current (±1.1% tolerance), 15 Ω dynamic impedance, and 0.5 μA maximum leakage at 7.3 V. It delivers stable voltage regulation for low-power biasing and reference applications in space-constrained portable electronics.

For engineers reviewing the BZX84B9V1LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its ±1.1% Zener voltage tolerance, 15 Ω Zener impedance at 5 mA, −65 °C to +150 °C operating range, 250 mW power rating on FR-5 board, and ESD robustness (>16 kV HBM).

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp or regulate voltage with minimal deviation across temperature and current variations. Its tight 9.1 V nominal Zener voltage is specified at 5 mA with ±1.1% tolerance and exhibits a positive temperature coefficient of +3.8 mV/°C.

The BZX84B9V1LT1G features a defined three-pin SOT-23 configuration (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), Pb-free construction, and UL 94 V-0 flammability rating. It is rated for 250 mW dissipation on FR-5 board with 500 °C/W thermal resistance and supports automated surface-mount assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.1 V nominal at 5 mA; ±1.1% tolerance ensures stable reference within ±0.1 V for precision analog circuits.
Zener Impedance (Z_ZT)	15 Ω max at 5 mA; low dynamic impedance maintains regulation accuracy under varying load currents.
Reverse Leakage Current (I_R)	0.5 μA max at 7.3 V; enables low-quiescent-current operation in battery-powered systems.
Power Dissipation (P_D)	250 mW on FR-5 board; sufficient for signal-level clamping and biasing without heatsinking.
Temperature Coefficient	+3.8 mV/°C at 5 mA; predictable drift allows compensation in temperature-sensitive references.
Capacitance (C)	130 pF at 0 V, 1 MHz; suitable for low-frequency regulation but not RF bypass applications.
ESD Rating	Class 3 (>16 kV) per HBM; withstands handling and board-level electrostatic discharge events.

Pinout & Package

SOT-23 (TO-236) surface-mount plastic package, 2.90 mm × 1.30 mm × 1.00 mm, void-free thermosetting case with corrosion-resistant finish and cathode polarity band. Rated for 260 °C soldering (10 s).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Forward-biased terminal; connects to lower-potential node during regulation.
2	No Connection	Internally unconnected; must remain floating-no PCB trace or pad required.
3	Cathode	Reverse-biased terminal; connects to higher-potential node to enable Zener conduction.

Key Features

Feature	Design Value
Tight Zener voltage tolerance	±1.1% (8.92–9.28 V) at 5 mA enables high-accuracy voltage references without trimming.
Low dynamic impedance	15 Ω max ensures minimal output voltage variation under changing load conditions.
High ESD robustness	Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld designs.
Pb-free and RoHS compliant	Meets global environmental regulations and supports lead-free reflow soldering profiles.
Small footprint	SOT-23 package saves >60% board area vs. DO-35, enabling high-density portable PCB layouts.

Applications

Portable Power Management	Signal Level Clamping
Use Scenario: Voltage reference for ADC biasing and LDO feedback networks in Bluetooth earbuds and wearables. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing stable 9.1 V reference point independent of supply ripple. Use Value: ±1.1% tolerance and +3.8 mV/°C TC allow direct use in 12-bit ADC reference chains without calibration.	Use Scenario: Input protection circuit limiting microcontroller GPIO voltage to safe levels during ESD transients. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping transient overvoltage to 9.1 V while sinking surge current. Use Value: 15 Ω Z_ZT and 0.5 μA I_R ensure fast response and negligible standby current draw.
Automotive Body Control Modules	Industrial Sensor Signal Conditioning
Use Scenario: Reference voltage generation for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Stable 9.1 V Zener source powering internal regulator stages under 9–16 V battery input. Use Value: −65 °C to +150 °C junction range and AEC-Q101 qualification support under-hood deployment.	Use Scenario: Precision voltage reference for 4–20 mA loop transmitter ICs in factory automation sensors. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed reference despite supply fluctuations in isolated 24 V loops. Use Value: 250 mW rating and 15 Ω impedance provide stable regulation across full industrial temperature range.

Portable Power Management

Signal Level Clamping

Use Scenario: Voltage reference for ADC biasing and LDO feedback networks in Bluetooth earbuds and wearables.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing stable 9.1 V reference point independent of supply ripple.

Use Value: ±1.1% tolerance and +3.8 mV/°C TC allow direct use in 12-bit ADC reference chains without calibration.

Use Scenario: Input protection circuit limiting microcontroller GPIO voltage to safe levels during ESD transients.

IC Role / Device Role / Timing Role: Reverse-biased Zener clamping transient overvoltage to 9.1 V while sinking surge current.

Use Value: 15 Ω Z_ZT and 0.5 μA I_R ensure fast response and negligible standby current draw.

Automotive Body Control Modules

Industrial Sensor Signal Conditioning

Use Scenario: Reference voltage generation for LIN bus transceiver biasing in door module ECUs.

IC Role / Device Role / Timing Role: Stable 9.1 V Zener source powering internal regulator stages under 9–16 V battery input.

Use Value: −65 °C to +150 °C junction range and AEC-Q101 qualification support under-hood deployment.

Use Scenario: Precision voltage reference for 4–20 mA loop transmitter ICs in factory automation sensors.

IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed reference despite supply fluctuations in isolated 24 V loops.

Use Value: 250 mW rating and 15 Ω impedance provide stable regulation across full industrial temperature range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C9V1LT1G	Standard-tolerance version: 9.1 V nominal, ±5% (8.5–9.6 V) vs. BZX84B9V1LT1G's ±1.1%.	Acceptable where cost sensitivity outweighs reference accuracy; higher leakage (0.5 μA vs. 0.5 μA same) and same 15 Ω Z_ZT.	Select BZX84C9V1LT1G only when ±5% regulation is sufficient and tighter tolerance adds no system benefit.
MMSZ4702T1G	Same 9.1 V nominal, but ±5% tolerance, 20 Ω Z_ZT, and 100 mW rating (vs. 250 mW); SOD-123 package.	Larger footprint and lower power handling limit use to ultra-low-power signal conditioning, not power rail regulation.	Choose MMSZ4702T1G only if SOD-123 layout compatibility is mandatory and 100 mW dissipation suffices.

Compared with BZX84C9V1LT1G and MMSZ4702T1G, the BZX84B9V1LT1G provides superior voltage accuracy and higher power capability in the smallest standard SMT package, making it optimal for precision reference and moderate-power regulation where board space is constrained.

Availability

BZX84B9V1LT1G is available at Aetrix Electronics and suitable for portable electronics, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for BZX84B9V1LT1G 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

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BZX84BxxxLT1G series belongs to onsemi's precision Zener voltage regulator product line, engineered specifically for high-accuracy, low-power voltage reference and clamping in space-constrained, high-reliability applications.

FAQ

What is the exact Zener voltage tolerance of the BZX84B9V1LT1G?

The BZX84B9V1LT1G has a tight Zener voltage tolerance of ±1.1% at 5 mA test current, corresponding to a guaranteed range of 8.92 V to 9.28 V. This specification is explicitly confirmed in the "BZX84BxxxL (Tight Tolerance Series)" table on page 4 of the official onsemi datasheet for BZX84B9V1LT1G.

Does the BZX84B9V1LT1G have a functional third pin, and what is its role?

No - Pin 2 of the BZX84B9V1LT1G is internally unconnected (NC), as confirmed in the "Pinout: 1-Anode, 2-No Connection, 3-Cathode" note on pages 2 and 4 of the datasheet. Only Pins 1 (Anode) and 3 (Cathode) are electrically active; Pin 2 must remain unconnected on the PCB.

Can the BZX84B9V1LT1G be used in automotive applications?

Yes - while the standard BZX84B9V1LT1G is not AEC-Q101 qualified, the SZ-prefix variant SZBZX84B9V1LT1G is explicitly listed as AEC-Q101 qualified and PPAP capable in the datasheet. For automotive use, the SZ variant must be selected; the BZX84B9V1LT1G itself is intended for commercial/industrial applications.

What is the maximum power dissipation of the BZX84B9V1LT1G on an FR-5 board?

The BZX84B9V1LT1G is rated for 250 mW total power dissipation on FR-5 board at 25 °C ambient, derating linearly by 2.0 mW/°C above that temperature. This value is specified in the "MAXIMUM RATINGS" table on page 2 of the onsemi datasheet for BZX84B9V1LT1G.

Is the BZX84B9V1LT1G RoHS compliant and Pb-free?

Yes - the BZX84B9V1LT1G is explicitly stated as Pb-free and RoHS compliant in the "Features" section (page 1) and "ORDERING INFORMATION" table (page 2) of the onsemi datasheet. The "G" suffix in the part number denotes Pb-free packaging per JEDEC standards.

BZX84B9V1LT1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: BZX84BxxxLT1G

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

BZX84B9V1LT1G FAQ

1.How can I place an order for BZX84B9V1LT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84B9V1LT1G 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 BZX84B9V1LT1G reliable?

The price and inventory of BZX84B9V1LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B9V1LT1G is usually 5 days.

3.What payment methods are accepted for BZX84B9V1LT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B9V1LT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84B9V1LT1G?

BZX84B9V1LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84B9V1LT1G 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 BZX84B9V1LT1G?

For technical support, including BZX84B9V1LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B9V1LT1G requirements.

6.How does Aetrix verify that BZX84B9V1LT1G is sourced from the original manufacturer or authorized distributors?

All BZX84B9V1LT1G 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 BZX84B9V1LT1G meets industry standards.

7.What is the process for return or replacement of BZX84B9V1LT1G?

All BZX84B9V1LT1G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B9V1LT1G, 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 BZX84B9V1LT1G part is unused and in its original packaging.

Return procedure for BZX84B9V1LT1G:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 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…

2026-09-02 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…