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Diodes Incorporated BZX84B22Q-7-F
- Part No.:
- BZX84B22Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B22Q-7-F.pdf
- Description:
- DIODE ZENER 22V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,106
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Product details
Overview
BZX84B22Q-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount precision Zener diode with nominal 22 V zener voltage (21.6–22.4 V range), ±2% tolerance, 350 mW power dissipation, and SOT23 package. It regulates voltage in low-power biasing, reference, and overvoltage protection circuits for automotive ECUs, sensor signal conditioning, and industrial control I/O modules.
For engineers reviewing the BZX84B22Q-7-F datasheet, BZX84B22Q-7-F pinout, BZX84B22Q-7-F application, or BZX84B22Q-7-F equivalent, key selection criteria include its tight 2% VZ tolerance at 5 mA test current, low 55 Ω dynamic impedance at IZT, 0.1 µA maximum reverse leakage at 15.4 V, and automotive-grade reliability per AEC-Q101.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across a load under varying current conditions. Its 22 V nominal zener voltage is specified at 5 mA test current (IZT), with 55 Ω zener impedance (ZZT) and 250 Ω knee impedance (ZZK) at 0.5 mA, ensuring predictable regulation in precision analog references.
The device features a positive temperature coefficient of +16.4 mV/°C above 12 V, enabling predictable thermal drift compensation in voltage references. Its SOT23 package supports automated placement and reflow soldering, with lead-free matte tin plating and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.0 V nominal, 21.6–22.4 V range at 5 mA - enables precise voltage clamping in 24 V system interfaces |
| Tolerance | ±2% - ensures consistent reference accuracy without post-production trimming |
| Power Dissipation | 350 mW - supports continuous operation in compact PCB layouts with minimal heatsinking |
| Zener Impedance (ZZT) | 55 Ω at 5 mA - minimizes output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.1 µA max at 15.4 V - reduces quiescent current in battery-powered sensor nodes |
| Temperature Coefficient | +16.4 mV/°C - allows predictable thermal drift modeling in automotive ambient ranges |
| Package | SOT23 - enables high-density routing and compatibility with standard pick-and-place equipment |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with 0.915 mm body width, 2.40 mm length, and 1.30 mm height; terminals are solderable matte tin-plated alloy 42 leads; polarity marked by cathode band on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during reverse-bias regulation; defines cathode-anode orientation for correct PCB layout |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; carries regulated voltage output; marked by band on top view |
| NC / Dummy (Pin 3) | Non-functional leadframe extension | Provides mechanical stability and thermal path; not electrically connected; must be left unconnected or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| ±2% VZ tolerance | Eliminates need for external calibration in voltage reference designs for industrial PLCs |
| 350 mW power rating | Supports transient overvoltage clamping in CAN transceiver protection without derating below 85°C |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive ELV directive for end-of-life recycling |
| Moisture Sensitivity Level 1 | Enables direct use from dry pack without baking, reducing manufacturing overhead in SMT lines |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable bias voltage to Hall-effect position sensors in transmission control modules. IC Role / Device Role / Timing Role: Zener voltage reference supplying excitation to sensor ICs operating from 12 V–24 V vehicle battery rails. Use Value: ±2% tolerance ensures sensor output linearity remains within 0.5% full-scale error across temperature and lifetime. |
Use Scenario: Generating 22 V reference for 16-bit ADC front-end in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable reference point for ratiometric measurement circuits. Use Value: 55 Ω ZZT limits reference voltage shift to <1.1 mV per 20 mA load change, preserving 14-bit ENOB. |
| RS-485 Transceiver Protection | Low-Power IoT Node Regulation |
Use Scenario: Clamping common-mode voltage spikes on RS-485 bus lines in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional transient suppressor limiting differential voltage to ±22 V during ESD events. Use Value: 0.1 µA leakage at 15.4 V prevents false triggering of fail-safe receivers during idle bus states. |
Use Scenario: Regulating supply to ultra-low-power microcontroller and BLE radio in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining 22 V rail for energy-harvesting boost converters. Use Value: 350 mW rating accommodates 100 ms surge currents up to 16 mA without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4686-TP (Micro Commercial) | 22 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Higher power but looser tolerance; larger footprint requires PCB redesign | Select when higher surge capability is needed and ±5% regulation error is acceptable |
| BZX84-C22 (Nexperia) | 22 V nominal, ±5% tolerance, 350 mW, SOT23, non-automotive grade | Lacks AEC-Q101 qualification; not rated for automotive temperature cycling or humidity testing | Acceptable for industrial controls where AEC-Q101 is not mandated |
Compared with MMSZ4686-TP and BZX84-C22, BZX84B22Q-7-F delivers tighter ±2% regulation and automotive qualification in the same SOT23 footprint-critical for safety-critical voltage references where long-term drift and thermal reliability are design constraints.
Availability
BZX84B22Q-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and low-power IoT node prototyping requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84B22Q-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 consumer markets.
The BZX84B series belongs to Diodes' precision Zener portfolio designed specifically for AEC-Q101-compliant voltage regulation in harsh-environment automotive electronics and industrial control systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX84B22Q-7-F?
The BZX84B22Q-7-F exhibits sharp reverse breakdown at 21.6 V minimum and 22.4 V maximum, specified at 5 mA test current (IZT). Below 15.4 V, reverse leakage remains ≤0.1 µA; no defined "maximum reverse voltage" exists outside breakdown-operation is intended only in controlled reverse-bias regulation mode.
Can BZX84B22Q-7-F replace BZX84-C22 in existing designs?
Yes, mechanically-both use SOT23 packaging with identical pinout-but BZX84B22Q-7-F offers ±2% VZ tolerance versus ±5% for BZX84-C22 and is AEC-Q101 qualified. Electrical replacement requires verifying that tighter regulation improves system accuracy and that automotive qualification aligns with end-equipment requirements.
What is the thermal resistance junction-to-ambient for this device?
When mounted on FR-4 PCB with recommended pad layout, RθJA is 357 °C/W (Note 6). With terminals held at ambient temperature, it rises to 417 °C/W (Note 5). Derating begins above 25°C ambient per Figure 1, reaching 0 mW at 150°C.
Does this Zener diode require a series current-limiting resistor in all applications?
Yes-BZX84B22Q-7-F must always be used with a series resistor to limit current to ≤350 mW dissipation. For example, at 24 V supply and 22 V regulation, a minimum 11.4 Ω resistor limits current to 175 mA (350 mW). Without it, excessive current causes thermal runaway and permanent failure.
BZX84B22Q-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):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15.4 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
BZX84B22Q-7-F FAQ
1.How can I place an order for BZX84B22Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B22Q-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 BZX84B22Q-7-F reliable?
The price and inventory of BZX84B22Q-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 BZX84B22Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B22Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B22Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B22Q-7-F?
BZX84B22Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B22Q-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 BZX84B22Q-7-F?
For technical support, including BZX84B22Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B22Q-7-F requirements.
6.How does Aetrix verify that BZX84B22Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B22Q-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 BZX84B22Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B22Q-7-F?
All BZX84B22Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B22Q-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 BZX84B22Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B22Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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