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Diodes Incorporated BZX84C30-7
- Part No.:
- BZX84C30-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C30-7.pdf
- Description:
- DIODE ZENER 30V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
BZX84C30-7 from Diodes Incorporated is a 30V, 350mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power circuits. It delivers nominal Zener voltage of 30V at 2mA test current, with ±6.7% tolerance (28.0–32.0V), 80Ω dynamic impedance at 2mA, and <0.1µA reverse leakage at 24.4V.
For engineers reviewing the BZX84C30-7 datasheet, BZX84C30-7 pinout, BZX84C30-7 application, or BZX84C30-7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (357°C/W), power derating above +25°C, RoHS/Green compliance, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp or regulate voltage with stable reference behavior across temperature. Its planar die construction ensures consistent parametric performance and compatibility with reflow soldering in automated SMT lines.
It exhibits a negative temperature coefficient of −3.5mV/°C near 30V, enabling predictable drift compensation in bias networks. The device is rated for operation from −65°C to +150°C and features matte tin-plated Alloy 42 leads for reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30V nominal at 2mA; min/max 28.0–32.0V - defines clamping threshold in protection circuits |
| Power Dissipation | 350mW at TA = 25°C - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 80Ω at IZT = 2mA - determines regulation stiffness under small-signal load variation |
| Reverse Leakage (IR) | <0.1µA at VR = 24.4V - ensures minimal quiescent current in standby voltage-monitoring paths |
| Thermal Resistance (RθJA) | 357°C/W - governs junction temperature rise under ambient conditions with no heatsinking |
| Temperature Coefficient | −3.5mV/°C - enables predictable voltage drift correction in temperature-sensitive references |
Pinout & Package
Package: SOT23 - compact 3-pin surface-mount plastic case (2.4mm × 1.3mm × 1.0mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference node | Connected to lower-potential side in reverse-bias regulation; defines polarity orientation on PCB |
| Cathode (Pin 2) | Zener breakdown terminal / voltage reference output | Connected to regulated rail or protected node; carries full Zener current during clamping |
| No Connection (Pin 3) | Internal die attach pad (non-functional) | Electrically isolated; serves mechanical support only - must not be connected in layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Green Molding Compound | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets global environmental compliance mandates |
| Planar die construction | Enables tight parameter distribution and high yield in volume SMT assembly |
| Matte tin lead finish | Lead-free plating compatible with Pb-free reflow profiles and MIL-STD-202 solderability requirements |
Applications
| Power Supply Monitoring | Overvoltage Protection |
|---|---|
Use Scenario: Detecting undervoltage or overvoltage conditions in 24V industrial DC rails before enabling downstream logic. IC Role / Device Role / Timing Role: Zener-based comparator reference input for supervisor ICs like MAX6326 or discrete transistor trigger circuits. Use Value: Stable 30V reference enables accurate trip-point setting within ±0.5V across −40°C to +125°C. | Use Scenario: Clamping transient spikes on CAN bus or sensor supply lines exposed to load-dump events. IC Role / Device Role / Timing Role: Shunt protection element placed between rail and ground to divert surge energy above 30V. Use Value: 350mW rating sustains 100ms pulses up to 300mA without degradation when used with series current-limiting resistor. |
| Voltage Reference for ADC | Microcontroller Reset Circuit |
Use Scenario: Providing stable reference for 10-bit SAR ADC in battery-powered IoT sensor nodes. IC Role / Device Role / Timing Role: Low-current Zener source feeding op-amp buffer to drive ADC REF+ pin. Use Value: 80Ω impedance ensures <0.1% reference error under 100µA load, supporting ±1LSB accuracy. | Use Scenario: Generating clean reset signal for ARM Cortex-M0 microcontrollers during brown-out recovery. IC Role / Device Role / Timing Role: Zener-regulated RC delay network feeding Schmitt-trigger input of reset IC (e.g., TPS3808). Use Value: −3.5mV/°C TC allows predictable reset threshold shift, simplifying thermal margin analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5261B-7-F | Same 30V nominal Zener, but 350mW rating, 100Ω ZZT, higher leakage (0.5µA @ 24.4V) | Slightly looser regulation; less suitable for precision reference use | Preferred where cost sensitivity outweighs regulation stiffness |
| BZX84-C30,115 | Identical electrical specs, same SOT23 package, but Nexperia marking and different tape/reel packaging (10k vs 3k) | No functional difference; logistics-driven substitution | Valid drop-in replacement if sourcing flexibility required |
Compared with MMBZ5261B-7-F and BZX84-C30,115, the BZX84C30-7 offers tighter Zener impedance (80Ω vs 100Ω) and lower leakage, making it optimal for precision voltage monitoring while maintaining full AEC-Q101 qualification and Green compliance.
Availability
BZX84C30-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and consumer power management systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84C30-7 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, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BZX84 series belongs to Diodes' broad portfolio of Zener diodes engineered for high-reliability voltage regulation in automotive, industrial, and computing applications - emphasizing AEC-Q101 qualification, green materials, and SMT process robustness.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZX84C30-7 has a nominal Zener voltage of 30V at 2mA test current, with guaranteed breakdown occurring between 28.0V and 32.0V. It is not rated for sustained operation above 32.0V - exceeding this risks irreversible thermal runaway unless current is strictly limited by external series resistance.
Is this part suitable for automotive applications?
Yes - the BZX84C30-7 is explicitly qualified to AEC-Q101 standards and manufactured with Green molding compound. It supports operating temperatures from −65°C to +150°C and is widely deployed in automotive body electronics, infotainment power supplies, and sensor interface protection circuits.
How does the temperature coefficient affect circuit performance?
With a temperature coefficient of −3.5mV/°C, the Zener voltage decreases by approximately 0.35V over a 100°C rise. This predictable drift allows designers to compensate reference points in temperature-critical applications such as battery voltage monitors or precision ADC references.
What is the significance of the "-7" suffix in the part number?
The "-7" denotes standard-compliance packaging: 3,000 units per 8mm tape-and-reel, optimized for pick-and-place assembly. It distinguishes the part from automotive-grade "Q-7-F" variants and higher-volume "-13-F" (10,000/reel) versions - all sharing identical electrical and thermal characteristics.
BZX84C30-7 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±7%
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C30-7 FAQ
1.How can I place an order for BZX84C30-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C30-7 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 BZX84C30-7 reliable?
The price and inventory of BZX84C30-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C30-7 is usually 5 days.
3.What payment methods are accepted for BZX84C30-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C30-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C30-7?
BZX84C30-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C30-7 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 BZX84C30-7?
For technical support, including BZX84C30-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C30-7 requirements.
6.How does Aetrix verify that BZX84C30-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C30-7 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 BZX84C30-7 meets industry standards.
7.What is the process for return or replacement of BZX84C30-7?
All BZX84C30-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C30-7, 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 BZX84C30-7 part is unused and in its original packaging.
Return procedure for BZX84C30-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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