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Diodes Incorporated BZX84B20Q-7-F
- Part No.:
- BZX84B20Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B20Q-7-F.pdf
- Description:
- DIODE ZENER 20V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,030
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Product details
Overview
BZX84B20Q-7-F from Diodes Incorporated is an AEC-Q101-qualified surface-mount precision Zener diode with nominal 20 V zener voltage (19.6–20.4 V), ±2% tolerance, 350 mW power dissipation, and SOT23 package. It regulates voltage in automotive power supply rails, ECU reference circuits, and sensor bias networks where stable reverse breakdown under low-current conditions is required.
For engineers reviewing the BZX84B20Q-7-F datasheet, BZX84B20Q-7-F pinout, BZX84B20Q-7-F application, or BZX84B20Q-7-F equivalent, this part delivers tightly controlled 20 V regulation at 5 mA test current, low dynamic impedance (55 Ω @ IZT), and temperature-stable performance (14.4 mV/°C TC) for automotive-grade voltage reference and overvoltage protection functions.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals. Its 20 V nominal zener voltage is specified at 5 mA test current (IZT), with maximum zener impedance of 55 Ω at IZT and 225 Ω at knee current (IZK = 1.0 mA).
It exhibits a positive temperature coefficient of +14.4 mV/°C, enabling predictable drift compensation in temperature-sensitive analog circuits. Rated for -65°C to +150°C operation and qualified per AEC-Q101, it supports automotive under-hood and control module environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 19.6–20.4 V range at 5 mA - ensures precise voltage clamping in 12 V/24 V automotive systems. |
| Power Dissipation (PD) | 350 mW - supports continuous regulation in compact SOT23 footprint without forced cooling. |
| Zener Impedance (ZZT) | 55 Ω @ 5 mA - minimizes output voltage variation under load transients in reference circuits. |
| Reverse Leakage (IR) | 0.1 µA @ 14.0 V - enables ultra-low standby current in battery-backed sensor interfaces. |
| Temperature Coefficient | +14.4 mV/°C - allows accurate thermal drift modeling for compensated voltage references. |
| Package | SOT23 - compatible with high-speed pick-and-place assembly and standard PCB reflow profiles. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units and ADAS power domains. |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic case with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to system ground or lower-potential node; defines polarity for reverse-bias operation. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output | Connected to input rail or node requiring voltage stabilization; carries regulated 20 V when reverse-biased. |
| No-Connect (Pin 3) | Internal die attach / mechanical support | Not electrically connected; serves thermal and mechanical anchoring function in SOT23 mold compound. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables single-supply 20 V reference accuracy without post-assembly trimming in automotive modules. |
| AEC-Q101 qualification | Validates reliability for 15-year automotive service life under thermal cycling, humidity, and vibration stress. |
| 350 mW power rating at ambient | Permits direct integration into 5–10 mA bias networks without external heat sinking in ECU PCB layouts. |
| Lead-free, halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV Directive requirements for end-of-life recyclability. |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 20 V reference for analog-to-digital converter (ADC) biasing in diesel ECU power management ICs. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference input and op-amp feedback networks. Use Value: Maintains <±0.4 V regulation error over -40°C to +125°C, ensuring consistent 12-bit ADC linearity in closed-loop fuel injection control. |
Use Scenario: Biasing bridge-based pressure sensors in factory automation PLC input modules. IC Role / Device Role / Timing Role: Low-drift excitation voltage source for Wheatstone bridge arms. Use Value: Delivers 20 V ±0.4 V with <0.1 µA leakage, minimizing offset drift and enabling sub-0.1% full-scale measurement accuracy. |
| Automotive Body Control Module (BCM) Overvoltage Clamp | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Clamping 24 V supply rail transients during load dump events in BCM microcontroller power domains. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting voltage spikes to ≤22 V. Use Value: Activates within 100 ns at 22 V, dissipating up to 350 mW transient energy without latch-up or parametric shift. |
Use Scenario: Generating isolated 20 V auxiliary rail for analog front-end amplifiers in portable ultrasound devices. IC Role / Device Role / Timing Role: Primary DC reference for isolated DC-DC converter feedback loop. Use Value: Provides 20 V reference with 55 Ω dynamic impedance, reducing output ripple by 40% compared to generic Zeners in 1 MHz switching regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5249B-TP (Micro Commercial) | 20 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Higher power but looser tolerance; larger footprint limits high-density automotive PCB use | Select when higher surge capability is needed and ±5% regulation is acceptable. |
| BZX84-C20 (Nexperia) | 20 V nominal, ±5% tolerance, 300 mW PD, SOT23, no AEC-Q101 qualification | Lacks automotive qualification; suitable only for industrial/commercial grade designs | Choose for cost-sensitive non-automotive applications where AEC-Q101 is not mandated. |
Compared with MMSZ5249B-TP and BZX84-C20, BZX84B20Q-7-F uniquely combines ±2% tolerance, AEC-Q101 qualification, and SOT23 compatibility-making it the only option for space-constrained, safety-critical automotive voltage references requiring tight regulation and long-term reliability validation.
Availability
BZX84B20Q-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and medical diagnostic equipment power sequencing requiring stable component supply and full AEC-Q101 compliance.
Supply support for BZX84B20Q-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 computing markets.
The BZX84B series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh-environment automotive electronics.
FAQ
What is the maximum reverse current (IR) specification for BZX84B20Q-7-F at 14.0 V?
The maximum reverse current is 0.1 µA at 14.0 V, measured at 25°C ambient. This ultra-low leakage enables minimal quiescent power draw in always-on automotive subsystems such as CAN transceiver bias networks and real-time clock backup circuits.
How does the +14.4 mV/°C temperature coefficient affect circuit design?
The positive temperature coefficient means the zener voltage increases linearly with junction temperature. Designers must account for this drift in high-accuracy references-e.g., pairing with negative-TC components or applying software calibration using on-board temperature sensors in ECUs.
Is BZX84B20Q-7-F compatible with lead-free reflow soldering processes?
Yes-it features matte tin-plated alloy 42 leads rated for standard Pb-free reflow profiles (peak 260°C, 20–40 sec), complies with J-STD-020 moisture sensitivity level 1, and requires no pre-bake prior to assembly.
What distinguishes the 'Q' suffix in BZX84B20Q-7-F from standard BZX84B20-7-F?
The 'Q' denotes AEC-Q101 qualification-verified through accelerated stress testing including HTSL, TCT, and HAST. Standard versions lack automotive qualification documentation and are restricted to commercial/industrial use per Diodes Incorporated's product segmentation.
BZX84B20Q-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):
- 20 V
- Tolerance:
- ±2%
- 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
BZX84B20Q-7-F FAQ
1.How can I place an order for BZX84B20Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B20Q-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 BZX84B20Q-7-F reliable?
The price and inventory of BZX84B20Q-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 BZX84B20Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B20Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B20Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B20Q-7-F?
BZX84B20Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B20Q-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 BZX84B20Q-7-F?
For technical support, including BZX84B20Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B20Q-7-F requirements.
6.How does Aetrix verify that BZX84B20Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B20Q-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 BZX84B20Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B20Q-7-F?
All BZX84B20Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B20Q-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 BZX84B20Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B20Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84B20Q-7-F Tags
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