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Diodes Incorporated BZX84C30-7-F
- Part No.:
- BZX84C30-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C30-7-F.pdf
- Description:
- DIODE ZENER 30V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:120,226
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Product details
Overview
BZX84C30-7-F 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 analog circuits. It delivers a nominal Zener voltage of 30V at 2.0mA 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-F datasheet, BZX84C30-7-F pinout, BZX84C30-7-F application, or BZX84C30-7-F equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (357°C/W), RoHS/Green compliance, AEC-Q101 qualification, and SOT23 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent electrical performance and high reliability across industrial temperature range (–65°C to +150°C).
It exhibits a negative temperature coefficient of –2.0 mV/°C near 30V, enabling predictable drift compensation in voltage-reference designs. The device is rated for 350mW power dissipation when leads are held at ambient temperature, with derating above +25°C per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30V nominal at IZT = 2.0mA; min/max 28.0–32.0V defines usable regulation window |
| Power Dissipation | 350mW maximum at TA = 25°C; derates linearly above ambient per RθJA = 357°C/W |
| Zener Impedance (ZZT) | 80Ω at 2mA - determines output voltage stability under small-signal load variation |
| Reverse Leakage (IR) | <0.1µA at VR = 24.4V - ensures minimal quiescent current in standby protection circuits |
| Temperature Coefficient | –2.0 mV/°C - enables predictable voltage drift for temperature-compensated references |
| Package | SOT23 - 3-pin surface-mount outline with 0.915mm lead pitch; compatible with standard reflow profiles |
Pinout & Package
Package: SOT23 - molded plastic case, UL 94V-0 rated, matte tin-plated Alloy 42 leadframe, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Pin 2 (Cathode) | Zener breakdown terminal | Connected to regulated output or voltage reference point; marked with band on package |
| Pin 3 (Anode) | Internal tie to Pin 1 | Electrically redundant anode connection; improves thermal and mechanical robustness |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and ESD (HBM ≥2kV) |
| Green / Halogen-free | Meets Diodes Inc.'s "Green" definition: Br+Cl <1500ppm, Sb <1000ppm; supports eco-compliant BOMs |
| Automated assembly optimized | Planar die + SOT23 geometry ensures high yield in pick-and-place and reflow processes |
| Low thermal resistance | RθJA = 357°C/W enables operation up to +125°C ambient without external heatsinking |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20mA transmitter circuits operating from 24V rails. IC Role / Device Role: Precision voltage reference and clamping element in analog front-end regulation. Use Value: Maintains 30V reference within ±0.2V over –40°C to +85°C, ensuring ADC linearity and sensor calibration integrity. |
Use Scenario: Protecting downstream USB PHY ICs from transient surges on VBUS during hot-plug events. IC Role / Device Role: Low-capacitance shunt clamp limiting VBUS to ≤32V during 10/1000µs surge pulses. Use Value: Sub-100pF junction capacitance minimizes signal distortion; 0.1µA leakage avoids false disconnect detection. |
| Programmable Logic Controller I/O Protection | DC-DC Feedback Divider Reference |
Use Scenario: Safeguarding digital input channels against field-wiring faults in 24V PLC modules. IC Role / Device Role: Reverse-biased Zener absorbing induced transients before reaching optocoupler inputs. Use Value: Withstands repeated 1A/8/20µs surges per IEC 61000-4-5 due to low ZZK (300Ω) and robust 350mW rating. |
Use Scenario: Providing stable top-divider node voltage in adjustable buck converter feedback networks. IC Role / Device Role: Replacing resistor divider with Zener-based reference to improve load regulation and temperature stability. Use Value: –2.0 mV/°C TC allows pairing with positive-TC resistors to achieve <±10ppm/°C overall reference drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5257BS-7-F | 30V Zener, 200mW rating, SOT323 package, higher ZZT = 100Ω at 20mA | Lower power handling limits use in sustained-clamp scenarios; smaller footprint reduces thermal mass | Select when board space is constrained and peak pulse energy is low (e.g., ESD-only protection) |
| BZX84-C30,115 | Same 30V/350mW spec, but in SOT23-3L with different marking and packaging (10,000/reel) | No functional difference; identical electrical and thermal behavior; differs only in reel quantity and date-code format | Select for volume procurement where tape-and-reel count (10k vs 3k) aligns with production planning |
Compared with MMBZ5257BS-7-F, BZX84C30-7-F offers 75% higher power margin and lower impedance for sustained regulation; versus BZX84-C30,115, it shares identical performance but differs in packaging logistics and traceability format.
Availability
BZX84C30-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB power protection, and PLC I/O conditioning requiring stable component supply with full AEC-Q101 traceability and Green compliance.
Supply support for BZX84C30-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BZX84 series belongs to Diodes' precision Zener portfolio targeting cost-sensitive, high-volume applications in automotive, industrial, and consumer electronics where reliability, RoHS compliance, and SMT manufacturability are critical.
FAQ
What is the maximum continuous Zener current for BZX84C30-7-F at 85°C ambient?
At 85°C ambient, the device's power derating curve (Fig. 1, Note 7) reduces max dissipation to ~245mW. Dividing by 30V yields ~8.2mA maximum continuous Zener current. This assumes no additional PCB copper heatsinking beyond the standard FR-4 pad layout.
Does BZX84C30-7-F support reflow soldering per J-STD-020?
Yes - its SOT23 package and matte tin finish meet J-STD-020 moisture sensitivity level 1, allowing unlimited floor life and compatibility with standard Pb-free reflow profiles (peak 260°C, 30 sec max). No pre-bake required prior to assembly.
How does the –2.0 mV/°C temperature coefficient impact voltage reference design?
This negative coefficient means output voltage decreases by 2mV per °C rise. In precision references, it can be compensated using a positive-TC resistor or paired with a forward-biased diode; uncorrected, it causes ~60mV drift over –40°C to +85°C span.
Is BZX84C30-7-F suitable for use in life support equipment?
No - Diodes Incorporated explicitly prohibits use in life support devices or systems without written CEO approval. Its qualification covers industrial and automotive applications, but not safety-critical medical functions per the Life Support Notice in DS18001 Rev. 33-2.
BZX84C30-7-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:
- ±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-F FAQ
1.How can I place an order for BZX84C30-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C30-7-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 BZX84C30-7-F reliable?
The price and inventory of BZX84C30-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C30-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C30-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C30-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C30-7-F?
BZX84C30-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C30-7-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 BZX84C30-7-F?
For technical support, including BZX84C30-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C30-7-F requirements.
6.How does Aetrix verify that BZX84C30-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C30-7-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 BZX84C30-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C30-7-F?
All BZX84C30-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C30-7-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 BZX84C30-7-F part is unused and in its original packaging.
Return procedure for BZX84C30-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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