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Diodes Incorporated BZX84C22T-7-F
- Part No.:
- BZX84C22T-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
BZX84C22T-7-F.pdf
- Description:
- DIODE ZENER 22V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BZX84C22T-7-F from Diodes Incorporated is a 22 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5 mA test current with ±5% tolerance (20.8–23.3 V), 55 Ω dynamic impedance at 5 mA, and 0.1 µA reverse leakage at 17.6 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the BZX84C22T-7-F datasheet, BZX84C22T-7-F pinout, BZX84C22T-7-F application, or BZX84C22T-7-F equivalent, key selection criteria include nominal Zener voltage, power dissipation derating above 25°C, thermal resistance (833 °C/W), junction temperature range (−65 to +150 °C), and RoHS-compliant matte tin plating.
Technical Context
This Zener diode uses planar die construction for stable breakdown characteristics and low noise performance. Its 22 V nominal Zener voltage is specified at 5 mA test current, with temperature coefficient of +16.4 to +20.0 mV/°C - indicating positive drift with rising temperature.
The device operates within a −65°C to +150°C junction/storage temperature range and exhibits 55 Ω Zener impedance at 5 mA and 225 Ω at 1 mA, confirming low dynamic resistance suitable for voltage reference stability under light load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 20.8–23.3 V range at IZT = 5 mA - defines regulated output voltage tolerance in reference circuits |
| Power Dissipation (PD) | 150 mW at TA = 25°C - limits continuous power handling on FR-4 PCB with recommended pad layout |
| Zener Impedance (ZZT) | 55 Ω at IZT = 5 mA - ensures minimal voltage deviation under small-signal load variations |
| Reverse Leakage (IR) | 0.1 µA at VR = 17.6 V - guarantees low quiescent current in standby-mode protection circuits |
| Thermal Resistance (RθJA) | 833 °C/W - determines junction temperature rise per milliwatt on standard FR-4 board |
| Temp. Coefficient (αVZ) | +16.4 to +20.0 mV/°C at IZT = 5 mA - quantifies voltage drift magnitude and direction with ambient change |
| Package | SOT-523 - ultra-small footprint (1.6 × 0.8 × 0.5 mm) enabling high-density PCB layouts |
Pinout & Package
SOT-523 package: 3-terminal surface-mount device with anode, cathode, and exposed drain (cathode-connected tab). Polarity marked by cathode band on top view; pin 1 = anode, pin 2 = cathode, pin 3 = cathode (internal tie).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; voltage referenced to this terminal during regulation |
| Cathode Tab (Pin 3) | Thermal & electrical cathode extension | Internally tied to Pin 2; improves heat dissipation and reduces parasitic inductance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | 1.6 × 0.8 × 0.5 mm body - enables placement in space-constrained consumer and portable electronics |
| Planar die construction | Stable Zener voltage with low noise and repeatable breakdown - critical for precision analog references |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe - meets global environmental compliance without solderability compromise |
| Moisture sensitivity level 1 | No floor life limitation before reflow - eliminates baking requirements for standard SMT assembly |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Providing stable 22 V bias for op-amp comparators or ADC reference buffers in battery-powered sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to deliver fixed reference voltage independent of supply variation. Use Value: Maintains ±5% regulation across 1–10 mA load range with <55 Ω dynamic impedance, minimizing reference error in signal conditioning stages. | Use Scenario: Clamping transient surges on 24 V industrial I/O lines to protect downstream logic inputs. IC Role / Device Role / Timing Role: Shunt protection element that conducts excess energy when line voltage exceeds 23.3 V (VZ(max)). Use Value: Limits peak clamped voltage to ≤23.3 V while dissipating up to 150 mW, preventing damage to 3.3 V or 5 V interface ICs. |
| ESD-Suppressed Signal Line | Temperature-Compensated Bias Generator |
Use Scenario: Integrating into USB or RS-485 data line ESD protection networks alongside TVS diodes. IC Role / Device Role / Timing Role: Secondary clamp with controlled breakdown threshold to refine voltage limiting behavior below main TVS trigger. Use Value: Adds 22 V clamping layer with predictable +16.4 to +20.0 mV/°C drift, improving system-level robustness against fast transients. | Use Scenario: Generating temperature-stable bias points in analog front-ends using matched Zener/BJT configurations. IC Role / Device Role / Timing Role: Primary voltage reference whose positive tempco offsets negative tempco of transistor base-emitter junctions. Use Value: Enables compensation design achieving <50 ppm/°C drift in bias networks for instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247BT-7-F | 22 V nominal, SOD-123 package, 500 mW PD, 30 Ω ZZT at 20 mA | Higher power handling but larger footprint; requires different PCB layout and thermal relief | Select when >150 mW dissipation or lower ZZT at higher current is required |
| BZX384-C22,115 | 22 V nominal, SOD-323 package, 300 mW PD, 55 Ω ZZT at 5 mA, same tempco | Larger than SOT-523 but smaller than SOD-123; compatible thermal profile and regulation accuracy | Choose for drop-in replacement where SOT-523 footprint is unavailable or assembly tooling favors SOD-323 |
Compared with MMSZ5247BT-7-F and BZX384-C22,115, the BZX84C22T-7-F offers the smallest PCB area (SOT-523), strictest RoHS compliance, and optimized thermal resistance for ultra-low-power designs - making it preferred for wearables and miniaturized IoT endpoints where size and environmental compliance are primary constraints.
Availability
BZX84C22T-7-F is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp protection, ESD-suppressed signal line, and temperature-compensated bias generator applications requiring stable component supply and full traceability.
Supply support for BZX84C22T-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, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered for compact, reliable voltage regulation in space-constrained and environmentally compliant applications including portable electronics and industrial controls.
FAQ
What is the maximum reverse voltage (VR) at which leakage remains ≤0.1 µA?
The BZX84C22T-7-F specifies 0.1 µA maximum reverse current at VR = 17.6 V - 20% below nominal Zener voltage. This value is confirmed in the Electrical Characteristics table and defines the upper limit of safe non-conducting operation before significant Zener conduction begins.
Can this Zener diode be used in series for higher voltage references?
Yes - multiple BZX84C22T-7-F devices may be connected in series to achieve higher reference voltages (e.g., two in series yield ~44 V), provided current uniformity is maintained and total power dissipation stays within 150 mW per device. Derating must account for individual thermal resistance and ambient temperature.
Is the SOT-523 package compatible with standard reflow profiles?
Yes - the SOT-523 package is qualified for IPC/JEDEC J-STD-020D Level 1 moisture sensitivity, meaning it can be processed using standard lead-free reflow profiles (peak 260°C) without pre-baking. The matte tin plating ensures reliable wetting and joint formation on ENIG and OSP finishes.
How does the +16.4 to +20.0 mV/°C temperature coefficient affect circuit design?
This positive temperature coefficient means output voltage increases linearly with junction temperature. In precision references, it must be compensated - e.g., by pairing with a negative-tempco component like a forward-biased diode or using a temperature-compensated Zener IC. Uncorrected, it introduces ~0.09% to 0.11% drift per °C rise.
BZX84C22T-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5.67%
- Power - Max:
- 150 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
BZX84C22T-7-F FAQ
1.How can I place an order for BZX84C22T-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C22T-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 BZX84C22T-7-F reliable?
The price and inventory of BZX84C22T-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 BZX84C22T-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C22T-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C22T-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C22T-7-F?
BZX84C22T-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C22T-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 BZX84C22T-7-F?
For technical support, including BZX84C22T-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C22T-7-F requirements.
6.How does Aetrix verify that BZX84C22T-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C22T-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 BZX84C22T-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C22T-7-F?
All BZX84C22T-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C22T-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 BZX84C22T-7-F part is unused and in its original packaging.
Return procedure for BZX84C22T-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C22T-7-F Tags
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