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

Diodes Incorporated BZX84C30Q-7-F

Name: BZX84C30Q-7-F
Brand: Diodes Incorporated
SKU: BZX84C30Q-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C30Q-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: BZX84C30Q-7-F.pdf

Description:: DIODE ZENER 30V 300MW SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

BZX84C30Q-7-F from Diodes Incorporated is an automotive-grade 30V, 2mA Zener diode in SOT23 package, rated for 350mW power dissipation and qualified to AEC-Q101. It provides precise voltage regulation with ±3.3% tolerance (28.0–32.0V), 80Ω dynamic impedance at 2mA test current, and low 0.1µA reverse leakage at 24.4V, used for overvoltage protection and reference voltage generation in automotive body control modules.

For engineers reviewing the BZX84C30Q-7-F datasheet, BZX84C30Q-7-F pinout, BZX84C30Q-7-F application, or BZX84C30Q-7-F equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (357°C/W), AEC-Q101 qualification status, SOT23 terminal configuration, and automotive tape-and-reel packaging compliance.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the matte tin-plated Alloy 42 leadframe supports reliable solderability per MIL-STD-202.

The device exhibits a negative temperature coefficient of −2.0mV/°C near 30V, enabling predictable drift compensation in precision reference circuits. Its 350mW power rating applies under ambient-temperature terminal conditions, with derating required above +25°C per the published power derating curve.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	30V nominal, 28.0–32.0V range at 2mA - defines regulated output voltage window under standard test conditions
Power Dissipation (P_D)	350mW at T_A = +25°C with terminals held at ambient - sets maximum continuous power handling without forced cooling
Zener Impedance (Z_ZT)	80Ω at I_ZT = 2mA - determines output voltage variation under changing load current
Reverse Leakage (I_R)	0.1µA max at V_R = 24.4V - ensures minimal standby current in voltage-clamp applications
Thermal Resistance (R_θJA)	357°C/W - quantifies junction-to-ambient temperature rise per watt dissipated on FR-4 board
Temperature Coefficient	−2.0mV/°C - enables predictable voltage drift correction in temperature-sensitive references
Package	SOT23 - surface-mount 3-terminal package with standardized footprint for automated assembly

Pinout & Package

SOT23 package: 3-pin surface-mount plastic case with cathode-marked top-side orientation; terminals are anode (pin 1), cathode (pin 2), and anode (pin 3) - internally shorted pins 1 and 3 form the anode connection, pin 2 is cathode.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Primary anode connection; electrically tied to pin 3 for low-inductance, high-current anode path
Pin 2	Cathode	Zener breakdown occurs between this terminal and anode; marked side of package identifies this pin
Pin 3	Anode	Secondary anode connection; internal bond wire parallel to pin 1 reduces series resistance

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood and cabin applications requiring high reliability and extended temperature operation
Green molding compound	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets global environmental compliance mandates
Moisture sensitivity level 1	No floor life limitation before reflow - eliminates baking requirements for production assembly
Matte tin lead finish	RoHS-compliant plating with proven solderability per MIL-STD-202, Method 208

Applications

Automotive Body Control Module

Industrial Sensor Signal Conditioning

Use Scenario: Voltage clamping on LIN bus transceiver supply rail subject to load dump transients.

IC Role / Device Role: Zener diode acting as shunt regulator to clamp rail voltage at 30V during transient events.

Use Value: Prevents damage to 3.3V/5V logic interfaces by limiting input voltage to safe levels defined by ISO 7637-2 Pulse 5a.

Use Scenario: Precision reference for 12-bit ADC in temperature-sensing front-end.

IC Role / Device Role: Stable 30V reference source for ratiometric scaling of sensor bridge outputs.

Use Value: Enables ±0.5% full-scale accuracy over −40°C to +125°C due to tight 30V tolerance and known TC.

Consumer Power Adapter Feedback

Medical Diagnostic Equipment Power Supervision

Use Scenario: Secondary-side voltage sensing in isolated flyback converter feedback loop.

IC Role / Device Role: Zener element in optocoupler-based feedback network regulating 12V output.

Use Value: Maintains ±1.5% output regulation across line/load variations with minimal component count.

Use Scenario: Undervoltage lockout (UVLO) threshold detection for 24V auxiliary power rail.

IC Role / Device Role: Reference node for comparator monitoring rail integrity prior to system startup.

Use Value: Ensures diagnostic subsystem only powers up when main supply exceeds 28V, preventing erratic behavior.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5261B-7-F	Same 30V nominal Zener voltage but 200mW rating and ±5% tolerance; not AEC-Q101 qualified	Limited to commercial-grade power supplies and non-automotive instrumentation	Select when cost sensitivity outweighs automotive qualification and tighter voltage tolerance
BZX84-C30LT1G	Identical 30V rating and AEC-Q101 qualification, but uses SOT-23-3L package with different pin 3 internal connection	Requires PCB layout revision due to alternate pinout; same thermal performance	Choose only if legacy design uses ON Semiconductor's pinout convention and sourcing flexibility is critical

Compared with MMBZ5261B-7-F and BZX84-C30LT1G, BZX84C30Q-7-F uniquely combines AEC-Q101 qualification, ±3.3% voltage tolerance, and SOT23 pinout compatibility - making it the preferred choice for new automotive designs requiring robust voltage reference stability.

Availability

BZX84C30Q-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal chains, and medical power supervision systems requiring stable component supply with guaranteed long-term availability.

Supply support for BZX84C30Q-7-F 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, specializing in high-reliability components for automotive, industrial, and consumer markets.

The BZX84C series belongs to Diodes' automotive-qualified Zener diode product line, designed specifically for voltage regulation, overvoltage protection, and reference applications in harsh-environment electronic control units.

FAQ

What is the maximum reverse voltage (V_R) rating for BZX84C30Q-7-F?

The maximum reverse voltage is 24.4V - this is the voltage at which reverse leakage current is specified (0.1µA). Operation above this voltage initiates controlled Zener breakdown, with full regulation occurring at the nominal 30V Zener voltage under 2mA test current. Exceeding 32.0V risks irreversible avalanche failure.

Is BZX84C30Q-7-F compatible with lead-free reflow profiles?

Yes - the device uses matte tin-plated terminals qualified to MIL-STD-202, Method 208, and supports standard JEDEC J-STD-020 lead-free reflow profiles. Its moisture sensitivity level is 1, eliminating pre-bake requirements and enabling direct placement into high-temperature reflow ovens up to 260°C peak.

How does the Q suffix in BZX84C30Q-7-F affect its specifications?

The "Q" denotes automotive qualification per AEC-Q101, including stress testing for temperature cycling, humidity bias, and high-temperature operating life. Electrically identical to standard BZX84C30-7-F, the Q version guarantees lot-level traceability, extended temperature range (−65°C to +150°C), and zero defects in automotive production environments.

Can BZX84C30Q-7-F replace BZX84C33Q-7-F in a circuit?

No - the 30V and 33V variants have non-overlapping Zener voltage ranges (28.0–32.0V vs. 31.0–35.0V). Substitution would shift regulation point by ≥1V, potentially violating downstream IC absolute maximum ratings or degrading reference accuracy beyond acceptable limits in precision applications.

BZX84C30Q-7-F 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:: Active

Voltage - Zener (Nom) (Vz):: 30 V

Tolerance:: ±6.67%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 21 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:: SOT-23-3

BZX84C30Q-7-F FAQ

1.How can I place an order for BZX84C30Q-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C30Q-7-F 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 BZX84C30Q-7-F reliable?

The price and inventory of BZX84C30Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C30Q-7-F is usually 5 days.

3.What payment methods are accepted for BZX84C30Q-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C30Q-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C30Q-7-F?

BZX84C30Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C30Q-7-F 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 BZX84C30Q-7-F?

For technical support, including BZX84C30Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C30Q-7-F requirements.

6.How does Aetrix verify that BZX84C30Q-7-F is sourced from the original manufacturer or authorized distributors?

All BZX84C30Q-7-F 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 BZX84C30Q-7-F meets industry standards.

7.What is the process for return or replacement of BZX84C30Q-7-F?

All BZX84C30Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C30Q-7-F, 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 BZX84C30Q-7-F part is unused and in its original packaging.

Return procedure for BZX84C30Q-7-F:

1.Submit a request within 90 days.

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

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