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Vishay General Semiconductor - Diodes Division BZX84C30-G3-08
- Part No.:
- BZX84C30-G3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C30-G3-08.pdf
- Description:
- DIODE ZENER 30V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,623
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Product details
Overview
BZX84C30-G3-08 from Vishay Semiconductors is a silicon planar Zener diode rated for 30 V nominal zener voltage (±5 % tolerance), 2 mA test current, 500 mW maximum power dissipation on lead, and 0.05 μA reverse leakage at 22.8 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84C30-G3-08 datasheet, BZX84C30-G3-08 pinout, BZX84C30-G3-08 application, or BZX84C30-G3-08 equivalent, this page delivers verified electrical parameters, SOT-23 package details, thermal resistance values, temperature coefficient, and direct alternatives for stable supply chain selection.
Technical Context
The BZX84C30-G3-08 operates as a single-element, unidirectional Zener diode with breakdown governed by avalanche mechanism above ~6 V. Its 8 × 10−4/°C temperature coefficient ensures predictable drift across −55 °C to +150 °C operating range.
Designed for surface-mount use on FR-4 PCBs, it features MSL level 1 moisture sensitivity, UL 94 V-0 molding compound, and 420 K/W junction-to-ambient thermal resistance under JEDEC® 51-3 conditions - enabling reliable operation in compact, thermally constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V min. / 30 V nom. / 31.5 V max. at IZT = 2 mA - defines precise clamping threshold for voltage reference or overvoltage suppression |
| Dynamic Resistance (ZZ) | 21.0 Ω at IZT = 2 mA - determines regulation stiffness and output impedance in feedback loops |
| Reverse Leakage (IR) | 0.05 μA max. at VR = 22.8 V - ensures minimal quiescent current draw in standby or high-impedance sensing nodes |
| Power Dissipation (Ptot) | 300 mW on FR-4 board - sets maximum continuous power handling without heatsinking |
| Temperature Coefficient (αVZ) | +8 × 10−4/°C - quantifies positive drift per degree Celsius, critical for temperature-stable references |
| Junction Temperature (Tj) | 150 °C max. - establishes upper thermal limit for reliability under sustained load |
| Thermal Resistance (RthJA) | 420 K/W - enables thermal budget calculation for ambient-limited derating |
Pinout & Package
SOT-23 plastic surface-mount package (9.2 mg weight, UL 94 V-0 flammability rating) with standard three-terminal configuration: anode, cathode, and unused terminal (cathode-anode-cathode pinout per Vishay SOT-23 footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased connection point; referenced to ground or lower potential in shunt regulator topology |
| 2 | Cathode | Zener breakdown terminal; connects to regulated node or voltage source input in clamp configuration |
| 3 | Anode (tie to Pin 1) | Internally connected to Pin 1 - electrically redundant but required for mechanical stability in SOT-23 layout |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Guarantees tight regulation band (28.5–31.5 V) without post-manufacture trimming |
| Avalanche breakdown mechanism | Enables stable, low-noise clamping above 6 V with predictable αVZ behavior |
| ESD robustness | HBM > 8 kV and MM > 800 V - supports handling in non-ESD-controlled assembly environments |
| MSL level 1 rating | Permits unlimited floor life and reflow without baking - simplifies SMT manufacturing flow |
| Green commercial-grade marking | G3 suffix indicates RoHS-compliant, halogen-free construction per Vishay material categorization |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Power Monitoring |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC inputs measuring thermistor or strain gauge outputs in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing 30 V rail clamp and low-drift bias for op-amp front-end stages. Use Value: Maintains <±0.5 % full-scale error across −40 °C to +85 °C ambient due to known +8 × 10−4/°C coefficient and 21 Ω dynamic resistance. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients up to 35 V during vehicle battery disconnect events. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp placed directly at MCU GPIO input, absorbing energy before internal ESD diodes activate. Use Value: Limits clamped voltage to ≤31.5 V with <0.05 μA leakage at 22.8 V - preserving signal integrity while meeting ISO 7637-2 pulse 5a immunity requirements. |
| Medical Portable Device Battery Management | Telecom Line Card Voltage Supervision |
Use Scenario: Monitoring Li-ion pack voltage via resistive divider into supervisor IC, requiring stable 30 V reference for 4.2 V/cell detection. IC Role / Device Role / Timing Role: Precision Zener element in feedback path of discrete voltage monitor circuit. Use Value: Delivers 30 V ±0.5 V accuracy at 2 mA, enabling ±10 mV threshold resolution for cell-level undervoltage/overvoltage alarms. | Use Scenario: Providing fail-safe reset assertion when -48 V telecom supply drops below −42 V during brownout conditions. IC Role / Device Role / Timing Role: Zener-based comparator reference feeding into dedicated reset generator IC. Use Value: Ensures reset activation at precisely −42.0 V (30 V × 1.4 ratio) with <1 % total error including tolerance and tempco - meeting GR-1089-CORE surge immunity thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5260BS-7-F | 30 V nominal, ±5 %, 200 mW Ptot, SOT-23, 25 Ω ZZ | Lower power rating limits use in sustained-clamp scenarios; higher ZZ reduces regulation precision | Select when board space is identical but thermal margin allows reduced dissipation |
| 1SMA5930BT3G | 30 V nominal, ±5 %, 1.5 W Ptot, SMA package, 15 Ω ZZ | Larger SMA footprint requires PCB redesign; higher power supports transient-heavy environments | Choose for industrial motor drives where 30 V clamping must survive repeated 100 ms surges |
Compared with BZX84C30-G3-08, MMBZ5260BS-7-F trades 200 mW power and 25 Ω dynamic resistance for identical SOT-23 fit, while 1SMA5930BT3G offers 1.5 W capability and lower ZZ in a larger SMA package - making BZX84C30-G3-08 optimal for space-constrained, thermally managed 300 mW applications.
Availability
BZX84C30-G3-08 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive power monitoring, and medical battery management requiring stable component supply and RoHS-compliant green packaging.
Supply support for BZX84C30-G3-08 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The BZX84-G series targets cost-sensitive, high-volume applications needing precision Zener regulation in ultra-small SOT-23 packages - optimized for consumer electronics, portable instrumentation, and automotive sub-systems where size and consistency are critical.
FAQ
What is the exact zener voltage tolerance for BZX84C30-G3-08?
The BZX84C30-G3-08 has a nominal zener voltage of 30 V with a tolerance of ±5 %, meaning its actual breakdown voltage falls between 28.5 V and 31.5 V when tested at 2 mA. This tolerance is indicated by the "C" in the part number and conforms to the E24 standard grading system specified in the Vishay BZX84-G Series datasheet Rev. 1.1.
Does BZX84C30-G3-08 meet AEC-Q101 automotive qualification?
No, the BZX84C30-G3-08 is not AEC-Q101 qualified. It belongs to the commercial-grade BZX84-G series (G3 suffix). Vishay offers AEC-Q101-qualified versions under separate ordering codes - these require explicit request and are designated with different suffixes not present in BZX84C30-G3-08.
What is the maximum reverse leakage current for BZX84C30-G3-08 and at what voltage is it measured?
The maximum reverse leakage current for BZX84C30-G3-08 is 0.05 μA, measured at a reverse voltage (VR) of 22.8 V. This value is specified in the Electrical Characteristics table of the Vishay datasheet and reflects the device's low standby power consumption in high-impedance clamp or reference configurations.
Can BZX84C30-G3-08 be used in place of BZX84B30-G3-08?
No - BZX84C30-G3-08 and BZX84B30-G3-08 differ in voltage tolerance: "C" denotes ±5 %, while "B" denotes ±2 %. Their zener voltage ranges are 28.5–31.5 V versus 29.4–30.6 V respectively. Substitution requires verification that the wider tolerance of BZX84C30-G3-08 meets system-level regulation accuracy requirements.
What is the thermal resistance junction-to-ambient (RthJA) for BZX84C30-G3-08 on a standard FR-4 board?
The thermal resistance junction-to-ambient (RthJA) for BZX84C30-G3-08 is 420 K/W when mounted on an FR-4 board using the recommended soldering footprint per JEDEC® 51-3. This value governs power derating curves and must be applied to ensure junction temperature remains ≤150 °C under continuous operation.
BZX84C30-G3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZX84-G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C30-G3-08 FAQ
1.How can I place an order for BZX84C30-G3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C30-G3-08 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-G3-08 reliable?
The price and inventory of BZX84C30-G3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C30-G3-08 is usually 5 days.
3.What payment methods are accepted for BZX84C30-G3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C30-G3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C30-G3-08?
BZX84C30-G3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C30-G3-08 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-G3-08?
For technical support, including BZX84C30-G3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C30-G3-08 requirements.
6.How does Aetrix verify that BZX84C30-G3-08 is sourced from the original manufacturer or authorized distributors?
All BZX84C30-G3-08 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-G3-08 meets industry standards.
7.What is the process for return or replacement of BZX84C30-G3-08?
All BZX84C30-G3-08 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C30-G3-08, 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-G3-08 part is unused and in its original packaging.
Return procedure for BZX84C30-G3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C30-G3-08 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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