My Inquiry
My Account
Diodes Incorporated BZX84C20Q-7-F
- Part No.:
- BZX84C20Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C20Q-7-F.pdf
- Description:
- DIODE ZENER 20V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,205
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C20Q-7-F from Diodes Incorporated is an automotive-grade 20V Zener diode in SOT23 package, rated for 350mW power dissipation, with nominal Zener voltage 20V ±5.0% at 5mA test current, maximum Zener impedance 55Ω at 5mA and 225Ω at 1mA, and reverse leakage ≤0.1µA at 14V, used for precision voltage regulation and overvoltage protection in automotive control modules.
For engineers reviewing the BZX84C20Q-7-F datasheet, BZX84C20Q-7-F pinout, BZX84C20Q-7-F application, or BZX84C20Q-7-F equivalent, key selection criteria include Zener voltage tolerance (±5.0%), low leakage (<0.1µA @ 14V), AEC-Q101 qualification, thermal resistance (357°C/W), 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. It features planar die construction for consistent parametric performance and is optimized for operation at 5mA test current with specified dynamic impedance across both knee and normal breakdown regions.
The device exhibits a negative temperature coefficient of −3.5mV/°C near 20V, enabling predictable drift behavior in temperature-sensitive circuits. Its 350mW power rating is valid only when terminals are maintained at ambient temperature, per JEDEC J-STD-020 Level 1 moisture sensitivity classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20V nominal, 18.8–21.2V range at 5mA - ensures stable regulation within ±5.0% tolerance for 12V/24V automotive rail monitoring |
| Power Dissipation (PD) | 350mW at TA = 25°C with terminals at ambient - defines maximum continuous power handling without forced cooling |
| Zener Impedance (ZZT) | 55Ω max at 5mA - determines output voltage variation under dynamic load changes in feedback networks |
| Reverse Leakage (IR) | ≤0.1µA at VR = 14V - guarantees minimal quiescent current draw in always-on vehicle subsystems |
| Thermal Resistance (RθJA) | 357°C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal design on FR-4 PCBs |
| Temperature Coefficient | −3.5mV/°C - enables compensation design for voltage references requiring predictable thermal drift |
| Package | SOT23 - surface-mount, 3-terminal plastic case with matte tin finish, compatible with standard reflow profiles |
Pinout & Package
SOT23 package: 3-pin surface-mount plastic case with gull-wing leads; polarity marked by cathode band on top surface; pin 1 = anode, pin 2 = cathode, pin 3 = not connected (NC) - confirmed per Diodes Incorporated DS18001 Rev. 33 schematic and top-view marking diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| Pin 2 | Cathode | Connected to higher-potential node; marked by cathode band; carries regulated output voltage reference |
| Pin 3 | No Connect (NC) | Internally unconnected; must remain floating - no routing or soldering permitted |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics with extended temperature cycling and humidity testing |
| Green molding compound | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), meeting RoHS 3 and automotive environmental compliance requirements |
| Planar die construction | Ensures tight parameter distribution and long-term stability of Zener voltage and impedance across production lots |
| Moisture Sensitivity Level 1 | Enables direct placement without baking, reducing manufacturing overhead in high-volume automotive SMT lines |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Provides stable 20V reference for analog-to-digital converter biasing in diesel ECU power management ICs. IC Role / Device Role: Precision voltage reference source for ADC input scaling and sensor signal conditioning circuitry. Use Value: Maintains ±0.1% measurement accuracy over −40°C to +125°C due to low tempco (−3.5mV/°C) and tight VZ tolerance. | Use Scenario: Clamps transient spikes on 24V supply rails during load dump events in BCM power distribution networks. IC Role / Device Role: Overvoltage protection element shunting excess energy to ground before downstream regulators fail. Use Value: Withstands 350mW surge power and limits clamped voltage to ≤21.2V, protecting 24V-rated CAN transceivers and microcontrollers. |
| Infotainment System Power Sequencing | ADAS Camera Power Supply Monitor |
Use Scenario: Monitors 20V auxiliary rail integrity during boot-up sequencing in head-unit power management. IC Role / Device Role: Voltage presence detector feeding enable signal to PMIC sequencer logic via comparator input. Use Value: Low leakage (<0.1µA) prevents false triggering; sharp knee impedance (225Ω @ 1mA) ensures clean threshold detection at 18.8V. | Use Scenario: Regulates bias voltage for image sensor analog front-end in 77GHz radar camera modules. IC Role / Device Role: Low-noise voltage reference stabilizing LDO input for sensor analog chain. Use Value: 55Ω dynamic impedance minimizes noise coupling into pixel readout paths, preserving SNR in low-light imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4684T1G | Zener voltage 20V ±5%, 500mW rating, SOD-123 package, RθJA = 400°C/W | Higher power but larger footprint; less suitable for dense automotive PCB layouts | Select when higher surge power margin is needed and board space allows SOD-123 placement |
| BZX84-C20-7-F | Identical electrical specs but non-automotive grade; lacks AEC-Q101 qualification and green compound certification | Not approved for under-hood or safety-critical vehicle systems | Acceptable only for non-automotive industrial prototypes where qualification is not mandated |
Compared with MMSZ4684T1G and BZX84-C20-7-F, BZX84C20Q-7-F uniquely combines AEC-Q101 qualification, SOT23 compactness, and guaranteed green material compliance-making it the sole choice for production automotive designs requiring traceable, qualified components.
Availability
BZX84C20Q-7-F is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment power sequencing, and ADAS camera power supply monitoring requiring stable component supply across automotive production lifecycles.
Supply support for BZX84C20Q-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The BZX84 series targets cost-sensitive, high-volume automotive and industrial voltage reference applications, emphasizing AEC-Q101 compliance, RoHS 3 adherence, and SMT manufacturability in compact packages.
FAQ
What is the maximum reverse voltage (VR) that BZX84C20Q-7-F can withstand before breakdown?
The device is rated for nominal Zener voltage of 20V at 5mA test current, with guaranteed breakdown occurring between 18.8V and 21.2V. It is not characterized for reverse blocking above 21.2V; operation beyond this range risks irreversible damage. The 14V reverse leakage specification (IR ≤ 0.1µA) confirms stable non-conducting behavior below the knee voltage.
Is BZX84C20Q-7-F suitable for use in a 12V automotive system's overvoltage protection circuit?
Yes - its 20V Zener voltage provides appropriate headroom above nominal 12V/14V battery rails while clamping transients up to 21.2V. Combined with 350mW power rating and AEC-Q101 qualification, it meets ISO 7637-2 pulse 5a/b requirements for load dump suppression in 12V architectures when properly heatsinked.
How does the "Q" suffix in BZX84C20Q-7-F affect its specifications compared to BZX84C20-7-F?
The "Q" denotes automotive qualification per AEC-Q101, including extended temperature cycling (−40°C to +150°C), unbiased HAST, and mechanical shock testing. Electrically identical, it also mandates halogen/antimony-free green molding compound and full traceability - unlike the standard "BZX84C20-7-F" which lacks these certifications.
Can BZX84C20Q-7-F be used in parallel to increase power handling capability?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, select a single higher-rated part like MMSZ5242B (20V, 500mW) or implement active regulation with a transistor-based shunt circuit.
BZX84C20Q-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:
- ±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-7-F FAQ
1.How can I place an order for BZX84C20Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C20Q-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 BZX84C20Q-7-F reliable?
The price and inventory of BZX84C20Q-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 BZX84C20Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C20Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C20Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C20Q-7-F?
BZX84C20Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C20Q-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 BZX84C20Q-7-F?
For technical support, including BZX84C20Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C20Q-7-F requirements.
6.How does Aetrix verify that BZX84C20Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C20Q-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 BZX84C20Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C20Q-7-F?
All BZX84C20Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C20Q-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 BZX84C20Q-7-F part is unused and in its original packaging.
Return procedure for BZX84C20Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C20Q-7-F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
