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Diodes Incorporated BZX84C20Q-13-F
- Part No.:
- BZX84C20Q-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C20Q-13-F.pdf
- Description:
- DIODE ZENER 20V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,421
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Product details
Overview
BZX84C20Q-13-F from Diodes Incorporated is an automotive-grade 20V Zener diode in SOT23 package, rated for 350mW power dissipation, with nominal Zener voltage 20V (18.8–21.2V range at 5mA), maximum Zener impedance 55Ω at test current, and reverse leakage ≤0.1µA at 14V. It provides precision voltage regulation in low-power biasing and overvoltage protection circuits for automotive control modules.
For engineers reviewing the BZX84C20Q-13-F datasheet, BZX84C20Q-13-F pinout, BZX84C20Q-13-F application, or BZX84C20Q-13-F equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (357°C/W), AEC-Q101 qualification, SOT23 terminal configuration, and automotive tape-and-reel packaging (10,000 pcs/reel).
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 breakdown characteristics and long-term stability, with a negative temperature coefficient of −3.5mV/°C near 20V.
The device is optimized for surface-mount automated assembly and meets stringent automotive reliability requirements per AEC-Q101. Its SOT23 package delivers low thermal resistance (357°C/W) when mounted on FR-4 PCBs with recommended pad layout, enabling reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20V nominal (18.8–21.2V range at IZT = 5mA); defines precise clamping threshold for voltage reference or protection |
| Power Dissipation | 350mW at TA = 25°C; sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZT) | 55Ω max at 1kHz, 5mA; determines voltage regulation stiffness under dynamic load changes |
| Reverse Leakage (IR) | ≤0.1µA at VR = 14V; ensures minimal quiescent current in standby bias networks |
| Thermal Resistance (RθJA) | 357°C/W; quantifies junction-to-ambient heat transfer efficiency on standard FR-4 board |
| Operating Temperature | −65°C to +150°C; supports under-hood automotive environments without derating |
| AEC-Q101 Qualified | Yes; validated for high-reliability automotive applications including engine control units and body electronics |
Pinout & Package
Package: SOT23 - surface-mount, 3-terminal plastic case with matte tin-plated Alloy 42 leadframe; UL 94V-0 rated; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction path / cathode reference return | Connected to lower-potential node in Zener bias network; enables reverse-biased operation when cathode is held higher |
| Cathode (Pin 2) | Zener breakdown terminal | Applied to regulated voltage rail or protection node; conducts when voltage exceeds 20V threshold |
| Collector / NC (Pin 3) | Internal die substrate connection / no internal connection | Electrically isolated from active junction; tied to leadframe for mechanical stability but not functional in Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - validated for vibration, temperature cycling, and humidity exposure in automotive ECUs |
| Green construction | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb); meets RoHS 3 and automotive environmental mandates |
| Low thermal resistance | 357°C/W junction-to-ambient - enables stable regulation without heatsinking in space-constrained modules |
| Precision voltage tolerance | ±6% (18.8–21.2V) at 5mA - supports tight reference accuracy in sensor biasing and ADC reference circuits |
| High-reliability plating | Matte tin annealed over Alloy 42 - ensures solderability per MIL-STD-202 and long-term intermetallic stability |
Applications
| Engine Control Unit (ECU) Sensor Biasing | Infotainment Power Rail Clamping |
|---|---|
|
Use Scenario: Providing stable 20V reference for analog front-end circuitry in oxygen sensor signal conditioning. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix bias voltage for op-amp input stages. Use Value: Maintains ±0.5% reference stability across −40°C to +125°C ambient, reducing sensor offset drift by >40% versus unregulated bias. |
Use Scenario: Clamping transient spikes on 24V supply rails feeding USB-C PD controllers in head unit power management. IC Role / Device Role / Timing Role: Overvoltage protection element shunting surge energy above 20V to ground during load dump events. Use Value: Limits rail excursion to ≤21.2V with <0.1µA leakage at 14V, preventing controller latch-up without adding series resistance. |
| Body Control Module (BCM) Reset Circuit | ADAS Camera Module Voltage Reference |
|
Use Scenario: Generating clean reset threshold for microcontroller supervisory circuit in door module MCU. IC Role / Device Role / Timing Role: Precision Zener defining trip point for RC-based reset generator timing network. Use Value: Enables accurate 20V trigger with ±6% tolerance, ensuring deterministic reset assertion within 10ms of power-up. |
Use Scenario: Supplying stable reference for image sensor analog gain control in surround-view camera ECU. IC Role / Device Role / Timing Role: Voltage reference source for DAC-controlled bias in CMOS image sensor analog chain. Use Value: Delivers <55Ω dynamic impedance at 5mA, minimizing gain error drift to <0.8% over temperature vs. generic 20V Zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4684T1G | Zener voltage 20V (19.0–21.0V), 500mW rating, SOD-123 package, RθJA = 400°C/W, non-AEC-Q101 | Larger footprint; higher thermal resistance limits use in high-density automotive PCBs | Select when cost priority outweighs AEC-Q101 compliance and board space is unconstrained |
| BZX84C20-13-F | Identical electrical specs and SOT23 package, but rated for commercial (not automotive) temperature range (−65°C to +150°C same, but no AEC-Q101 validation) | Not qualified for automotive production; unsuitable for safety-critical or OEM-specified designs | Choose only for industrial prototypes or non-automotive applications where qualification documentation is not required |
Compared with MMSZ4684T1G and BZX84C20-13-F, BZX84C20Q-13-F uniquely combines AEC-Q101 qualification, SOT23 miniaturization, and 350mW/357°C/W thermal performance-making it the sole option for volume automotive designs requiring traceable reliability and compact layout.
Availability
BZX84C20Q-13-F is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power management, and ADAS camera modules requiring stable component supply with full AEC-Q101 traceability and 10,000-piece tape-and-reel delivery.
Supply support for BZX84C20Q-13-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 since 1960.
The BZX84C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener test current for BZX84C20Q-13-F?
The specified Zener voltage of 20V is measured at a test current (IZT) of 5mA, as defined in the Electrical Characteristics table of DS18001 Rev. 33-2. This current establishes the nominal breakdown point under controlled DC conditions and is used for all parameter measurements including ZZT and temperature coefficient.
Does BZX84C20Q-13-F have a guaranteed maximum Zener impedance at low currents?
No - the datasheet specifies ZZT = 55Ω maximum only at IZT = 5mA and f = 1kHz. At lower currents (e.g., 1mA), impedance rises significantly; Figure 2 shows typical VZ vs. IZ curves confirming increased dynamic resistance below 2mA, making it unsuitable for sub-mA regulation applications.
Can BZX84C20Q-13-F be used in place of a 24V Zener diode?
No - its nominal Zener voltage is 20V (18.8–21.2V range), not 24V. Substituting it for a 24V part like BZX84C24Q-13-F would result in premature conduction and potential system malfunction. The marking code "Y7" confirms 20V; "YA" denotes 27V, and "YB" denotes 30V in this series.
Is the third pin (SOT23 Pin 3) electrically functional in BZX84C20Q-13-F?
No - Pin 3 is internally unconnected (NC) and serves only as a mechanical tie-point to the leadframe. The active Zener junction exists solely between Pins 1 (Anode) and 2 (Cathode); connecting Pin 3 provides no electrical benefit and may compromise thermal or mechanical integrity if misused in layout.
BZX84C20Q-13-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):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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
BZX84C20Q-13-F FAQ
1.How can I place an order for BZX84C20Q-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C20Q-13-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 BZX84C20Q-13-F reliable?
The price and inventory of BZX84C20Q-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C20Q-13-F is usually 5 days.
3.What payment methods are accepted for BZX84C20Q-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C20Q-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C20Q-13-F?
BZX84C20Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C20Q-13-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 BZX84C20Q-13-F?
For technical support, including BZX84C20Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C20Q-13-F requirements.
6.How does Aetrix verify that BZX84C20Q-13-F is sourced from the original manufacturer or authorized distributors?
All BZX84C20Q-13-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 BZX84C20Q-13-F meets industry standards.
7.What is the process for return or replacement of BZX84C20Q-13-F?
All BZX84C20Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C20Q-13-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 BZX84C20Q-13-F part is unused and in its original packaging.
Return procedure for BZX84C20Q-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C20Q-13-F Tags
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