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

Diodes Incorporated BZX84C9V1-7

Name: BZX84C9V1-7
Brand: Diodes Incorporated
SKU: BZX84C9V1-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C9V1-7

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: BZX84C9V1-7.pdf

Description:: DIODE ZENER 9.1V 350MW SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,090

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Product details

Overview

BZX84C9V1-7 from Diodes Incorporated is a 350mW surface-mount Zener diode with nominal zener voltage 9.1V (±5.5%), 15Ω dynamic impedance at 5mA test current, 0.5µA maximum reverse leakage at 6.0V, and SOT23 package. It provides precise voltage regulation in low-power biasing and reference circuits for industrial sensor signal conditioning.

For engineers reviewing the BZX84C9V1-7 datasheet, BZX84C9V1-7 pinout, BZX84C9V1-7 application, or BZX84C9V1-7 equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking, RoHS/Green compliance status, and AEC-Q101 qualification details required for automotive and industrial design-in.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified zener voltage tolerance of ±5.5% (8.5–9.6V) at I_ZT = 5mA. Its temperature coefficient of +3.8 mV/°C indicates positive drift over temperature, requiring compensation in precision references.

The device exhibits 15Ω zener impedance (Z_ZT) at 1kHz and 5mA, and 100Ω knee impedance (Z_ZK) at I_ZK = 1.0mA, defining its regulation linearity and low-current stability in feedback networks.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.1V nominal, 8.5–9.6V range at 5mA - sets stable reference point for analog circuit biasing
Power Dissipation (P_D)	350mW at T_A = 25°C - defines max continuous power before thermal derating begins
Zener Impedance (Z_ZT)	15Ω at 1kHz, 5mA - determines output voltage variation under load current changes
Reverse Leakage (I_R)	0.5µA max at V_R = 6.0V - ensures minimal error current in high-impedance reference nodes
Temperature Coefficient	+3.8 mV/°C - quantifies voltage drift per degree Celsius above 25°C
Package	SOT23 - enables automated placement, occupies 2.4 × 1.3 mm PCB area, supports 0.008g weight constraint
RoHS & Green Status	Fully RoHS 3 compliant, halogen- and antimony-free - satisfies IPC-1752A environmental reporting

Pinout & Package

SOT23 package with 3 terminals: anode (pin 1), cathode (pin 2), and no connection (pin 3). Cathode marked by band on top surface; pin 1 is leftmost when marking side faces up and notch/bar oriented left.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to lower-potential node in reverse-biased configuration; required for proper orientation during placement
Pin 2	Cathode	Marked terminal; connects to regulated output or reference node; carries full zener current
Pin 3	No Connection	Internally unconnected; must remain floating - not used for thermal relief or grounding

Key Features

Feature	Design Value
Planar die construction	Enables tight V_Z tolerance control and repeatable Z_ZT across production lots
AEC-Q101 qualification	Validated for automotive under-hood applications including engine control modules and body electronics
Moisture Sensitivity Level 1	Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines
Matte tin lead finish	Ensures reliable solderability per MIL-STD-202 Method 208 without post-assembly cleaning
Green molding compound	Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - meets strict OEM chemical content reporting requirements

Applications

Voltage Reference for ADC Biasing

Overvoltage Clamp in Sensor Interface

Use Scenario: Provides stable 9.1V reference to bias op-amp input stages in 12-bit analog-to-digital converter front-ends.

IC Role / Device Role: Precision shunt reference establishing fixed common-mode voltage for differential input amplifiers.

Use Value: 15Ω Z_ZT limits reference voltage shift to <75mV under ±5mA load variation, preserving ADC accuracy.

Use Scenario: Protects 3.3V microcontroller GPIO pins from transient surges induced by 24V industrial solenoid switching.

IC Role / Device Role: Low-energy crowbar clamping element diverting excess energy to ground before IC damage threshold.

Use Value: 0.5µA leakage at 6V ensures negligible quiescent current draw while maintaining fast 9.1V breakdown response.

Power Supply Feedback Divider

Temperature-Stable Bias Generator

Use Scenario: Sets output voltage in isolated flyback converter using optocoupler feedback loop with TL431 secondary-side controller.

IC Role / Device Role: Secondary-side zener reference stabilizing feedback divider ratio against input ripple and load transients.

Use Value: +3.8 mV/°C TC allows predictable compensation when paired with NTC thermistor in divider network.

Use Scenario: Generates temperature-compensated bias current for RF amplifier stage in automotive telematics module.

IC Role / Device Role: Zener-based current source where V_Z drift is matched against transistor V_BE drift.

Use Value: Tight 8.5–9.6V V_Z tolerance ensures ±1.5% initial bias current accuracy across manufacturing lot.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5240B-7-F	Zener voltage 10V ±5%, 17Ω Z_ZT, 300mW P_D, same SOT23 package	Higher V_Z shifts reference point; requires resistor recalibration in feedback networks	Select when 10V system rail alignment is required and ±0.9V margin suffices
BZX84-C9V1,115	Identical V_Z and Z_ZT, but Nexperia version uses different green compound spec (Br+Cl <1500ppm)	No functional difference; qualifies for alternate sourcing where dual-sourcing is mandated	Choose for supply chain diversification without circuit redesign

Compared with MMBZ5240B-7-F and BZX84-C9V1,115, the BZX84C9V1-7 offers tighter V_Z tolerance (±5.5% vs ±5% for MMBZ5240B, identical to Nexperia), identical thermal resistance (357°C/W), and Diodes Inc.'s AEC-Q101 validation - making it preferred for automotive-grade voltage references demanding traceable qualification.

Availability

BZX84C9V1-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer power adapter feedback circuits requiring stable component supply with full RoHS 3 and AEC-Q101 compliance.

Supply support for BZX84C9V1-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China and Malaysia.

The BZX84 series belongs to Diodes' precision Zener portfolio targeting cost-sensitive, high-volume applications in automotive, industrial, and computing systems where stable voltage reference and robust ESD immunity are essential.

FAQ

What is the maximum reverse voltage before breakdown for BZX84C9V1-7?

The BZX84C9V1-7 has a nominal zener voltage of 9.1V with a guaranteed range of 8.5V to 9.6V at 5mA test current. Breakdown occurs within this range; operation below 8.5V ensures non-conduction, while voltages above 9.6V guarantee conduction. The device is not rated for sustained reverse voltage beyond its specified V_Z range.

Does BZX84C9V1-7 require heatsinking in typical SMT applications?

No heatsink is required. At 25°C ambient, the device dissipates up to 350mW with junction-to-ambient thermal resistance of 357°C/W. Even at 70°C ambient, derated power remains ~250mW - sufficient for most reference and clamp roles drawing <25mA. Standard FR-4 PCB pad layout per Diodes' recommended footprint provides adequate thermal path.

How does the +3.8 mV/°C temperature coefficient affect long-term stability?

The +3.8 mV/°C coefficient means V_Z increases by 3.8mV per °C rise above 25°C. Over a –40°C to +125°C range, this results in ±570mV total drift. For applications needing <1% stability, external compensation (e.g., series NTC or complementary diode) is necessary - the coefficient itself is predictable and repeatable across units.

Is BZX84C9V1-7 suitable for use in life support equipment?

No. Per Diodes Incorporated's Life Support Notice, this device is explicitly not authorized for use in life support devices or systems - including implantables or systems where failure could cause injury. Its AEC-Q101 qualification covers automotive reliability, not medical safety certification such as ISO 13485 or IEC 62304.

BZX84C9V1-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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:: ±6%

Power - Max:: 350 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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BZX84C9V1-7 FAQ

1.How can I place an order for BZX84C9V1-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C9V1-7 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 BZX84C9V1-7 reliable?

The price and inventory of BZX84C9V1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C9V1-7 is usually 5 days.

3.What payment methods are accepted for BZX84C9V1-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C9V1-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C9V1-7?

BZX84C9V1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C9V1-7 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 BZX84C9V1-7?

For technical support, including BZX84C9V1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C9V1-7 requirements.

6.How does Aetrix verify that BZX84C9V1-7 is sourced from the original manufacturer or authorized distributors?

All BZX84C9V1-7 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 BZX84C9V1-7 meets industry standards.

7.What is the process for return or replacement of BZX84C9V1-7?

All BZX84C9V1-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C9V1-7, 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 BZX84C9V1-7 part is unused and in its original packaging.

Return procedure for BZX84C9V1-7:

1.Submit a request within 90 days.

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

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