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Diodes Incorporated BZX84B30-7-F
- Part No.:
- BZX84B30-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B30-7-F.pdf
- Description:
- DIODE ZENER 30V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,809
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Product details
Overview
BZX84B30-7-F from Diodes Incorporated is a precision 30 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature, with 80 Ω maximum Zener impedance at 2 mA test current and 0.1 µA maximum reverse leakage at 21 V, used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZX84B30-7-F datasheet, BZX84B30-7-F pinout, BZX84B30-7-F application, or BZX84B30-7-F equivalent, key selection criteria include its tight 2% Zener voltage tolerance, AEC-Q101 qualification for automotive use, SOT23 surface-mount compatibility with automated assembly, and thermal resistance of 357 °C/W under specified mounting conditions.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with nominal Zener voltage of 30 V (29.4–30.6 V range) at 2 mA test current and temperature coefficient of +24.4 mV/°C - indicating positive drift above 25 °C. Its low 0.1 µA reverse current at 21 V ensures minimal standby power loss in bias networks.
The device's 350 mW power rating applies when terminals are held at ambient temperature; derating begins above 25 °C per Figure 1, reaching ~200 mW at 100 °C ambient. Its 80 Ω dynamic impedance at IZT = 2 mA supports stable regulation under moderate current transients in feedback loops and reference dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, 29.4–30.6 V range at 2 mA - enables precise 30 V reference generation with ±2% initial accuracy. |
| Power Dissipation (PD) | 350 mW at TA = 25 °C - supports continuous regulation in low-power sensor interfaces and microcontroller reset circuits. |
| Zener Impedance (ZZT) | 80 Ω max at 2 mA - ensures minimal output voltage variation under small-signal load changes in analog references. |
| Reverse Leakage (IR) | 0.1 µA max at 21 V - reduces quiescent current in high-impedance bias networks and battery-powered applications. |
| Temperature Coefficient | +24.4 mV/°C - quantifies predictable positive VZ drift above 25 °C, critical for temperature-compensated designs. |
| Package | SOT23 - standard 3-pin surface-mount footprint compatible with reflow soldering and high-density PCB layouts. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability, including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SOT23 - compact 3-terminal plastic surface-mount case with matte tin-plated alloy 42 leadframe; polarity marked by cathode band on top surface; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; forms return path for regulation current. |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated voltage node; carries full Zener current during operation; marked by band on package top. |
| No Connect (Pin 3) | Internal die attach pad | Electrically isolated from die; serves mechanical support only - must not be connected in circuit layout. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Reduces need for post-production trimming in precision reference circuits, improving yield in production analog modules. |
| AEC-Q101 qualification | Validates suitability for automotive body control, infotainment power rails, and ADAS sensor supply regulation without additional qualification effort. |
| 350 mW power rating with 357 °C/W RθJA | Enables stable operation up to 100 °C ambient in thermally constrained enclosures when mounted per recommended pad layout. |
| Halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV requirements, supporting compliance in global Tier 1 supply chains. |
| SOT23 tape-and-reel packaging (3000 pcs/reel) | Supports high-speed pick-and-place assembly with J-STD-020 Level 1 moisture sensitivity - zero bake requirement before SMT. |
Applications
| Automotive Sensor Reference | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Providing stable 30 V reference for analog-to-digital conversion in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation and offset calibration. Use Value: ±2% VZ tolerance and +24.4 mV/°C TC enable <1.5% total error over –40 to +125 °C without external compensation. |
Use Scenario: Clamping transient overvoltage on 24 V DC input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener clamp protecting downstream optocoupler inputs from surge events. Use Value: 350 mW rating and 80 Ω ZZT limit clamped voltage to ≤32 V during 100 ns transients, preserving isolation integrity. |
| Medical Wearable Power Monitoring | IoT Edge Node Voltage Supervision |
|
Use Scenario: Regulating bias voltage for low-noise instrumentation amplifiers in portable ECG front-ends. IC Role / Device Role / Timing Role: Low-drift Zener reference for amplifier gain-setting resistors and ADC reference buffers. Use Value: 0.1 µA IR at 21 V minimizes loading on high-impedance divider networks, preserving signal fidelity in µA-level bias paths. |
Use Scenario: Generating reset threshold for ultra-low-power microcontrollers in battery-operated smart meters. IC Role / Device Role / Timing Role: Zener-based brown-out detection element triggering MCU reset below 28.5 V supply. Use Value: Tight 29.4–30.6 V VZ window allows deterministic reset assertion with <0.3 V hysteresis using simple comparator circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4700T1G | 30 V nominal, ±5% tolerance, 500 mW PD, 100 Ω ZZT at 1 mA - looser tolerance, higher power, higher impedance. | Acceptable where cost sensitivity outweighs precision; less suitable for temperature-stable references. | Select when budget constraints dominate and ±5% VZ drift is acceptable in non-critical biasing. |
| BZX84-C30 | 30 V nominal, ±5% tolerance, 350 mW PD, 80 Ω ZZT at 5 mA - same package but wider tolerance and different test current. | Higher test current shifts operating point; less accurate at low-current bias points typical in IoT nodes. | Prefer only if legacy BOM reuse is required and tighter tolerance is not needed for system-level accuracy. |
Compared with MMSZ4700T1G and BZX84-C30, BZX84B30-7-F delivers superior initial accuracy (±2% vs. ±5%) and lower temperature-induced drift, making it optimal for automotive and medical applications demanding long-term reference stability without calibration.
Availability
BZX84B30-7-F is available at Aetrix Electronics and suitable for automotive sensor reference, industrial PLC input protection, and IoT edge node voltage supervision requiring stable component supply, AEC-Q101 compliance, and RoHS 3-conformant manufacturing.
Supply support for BZX84B30-7-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 with ISO/TS 16949 and ISO 14001 certifications.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage clamping in space-constrained, high-volume surface-mount applications.
FAQ
What is the maximum reverse voltage (VR) that BZX84B30-7-F can block before breakdown?
The BZX84B30-7-F exhibits 0.1 µA reverse leakage current at 21 V, and its nominal Zener voltage is 30 V. Breakdown occurs within the 29.4–30.6 V range at 2 mA test current; therefore, reliable blocking is guaranteed up to 21 V, with controlled regulation beginning near 29.4 V under specified test conditions.
Is BZX84B30-7-F suitable for use in high-frequency noise suppression?
No - this device is optimized for DC and low-frequency voltage regulation, not RF filtering. Its typical junction capacitance is ~100 pF at 0 V (inferred from Figure 4 trend), and no AC impedance or frequency response data is specified in the datasheet for noise suppression applications.
Can BZX84B30-7-F replace BZX84-C30 in an existing design?
Yes, with caveats: both share SOT23 package and 30 V nominal rating, but BZX84B30-7-F uses 2 mA test current and ±2% tolerance versus BZX84-C30's 5 mA and ±5%. Circuit performance may improve in low-current bias networks, but verify regulation stability under actual load conditions.
Does the "-7-F" suffix indicate tape-and-reel packaging and lead-free finish?
Yes - per Diodes' ordering information, "-7-F" denotes standard (non-automotive) qualification, SOT23 package, and 3000-piece tape-and-reel packaging with fully RoHS-compliant, matte tin-plated, lead-free terminations meeting J-STD-020 Level 1 moisture sensitivity requirements.
BZX84B30-7-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:
- ±2%
- 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
BZX84B30-7-F FAQ
1.How can I place an order for BZX84B30-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B30-7-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 BZX84B30-7-F reliable?
The price and inventory of BZX84B30-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B30-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B30-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B30-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B30-7-F?
BZX84B30-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B30-7-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 BZX84B30-7-F?
For technical support, including BZX84B30-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B30-7-F requirements.
6.How does Aetrix verify that BZX84B30-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B30-7-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 BZX84B30-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B30-7-F?
All BZX84B30-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B30-7-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 BZX84B30-7-F part is unused and in its original packaging.
Return procedure for BZX84B30-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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