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Diodes Incorporated BZT52C22S-7
- Part No.:
- BZT52C22S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C22S-7.pdf
- Description:
- DIODE ZENER 22V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,758
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Product details
Overview
BZT52C22S-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 22 V zener voltage (20.8–23.3 V range at 5 mA), 200 mW power dissipation, and SOD323 package. It provides precise voltage regulation in low-power biasing, overvoltage protection, and reference circuits for industrial sensors and automotive ECUs.
For engineers reviewing the BZT52C22S-7 datasheet, BZT52C22S-7 pinout, BZT52C22S-7 application, or BZT52C22S-7 equivalent, key selection criteria include zener voltage tolerance (±5%), dynamic impedance (55 Ω @ 5 mA), reverse leakage (0.1 µA @ 16.4 V), temperature coefficient (+15.4 mV/°C), and AEC-Q101 qualification for automotive reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with specified test current of 5 mA and maximum zener impedance of 55 Ω at that condition. Its positive temperature coefficient (+15.4 mV/°C) ensures predictable drift in thermal environments above 25°C.
The device uses planar die construction in a molded plastic SOD323 case rated UL 94V-0, with matte tin-plated alloy 42 leads and cathode band polarity marking. Moisture sensitivity is Level 1 per J-STD-020, supporting standard reflow profiles without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 20.8–23.3 V range at 5 mA - defines regulated output voltage under design current |
| Power Dissipation (PD) | 200 mW - limits continuous power handling on FR-4 PCB with recommended pad layout |
| Zener Impedance (ZZT) | 55 Ω max @ 5 mA - determines regulation stiffness against load current changes |
| Reverse Leakage (IR) | 0.1 µA @ 16.4 V - ensures minimal quiescent current in standby protection circuits |
| Temperature Coefficient | +15.4 mV/°C - quantifies voltage drift per degree rise above 25°C |
| Package | SOD323 - 1.3 mm × 1.7 mm footprint, compatible with high-density automated assembly |
| Qualification | AEC-Q101 qualified - validated for automotive underhood applications requiring high reliability |
Pinout & Package
Package: SOD323 - surface-mount plastic case with cathode band marking; dimensions: 1.30 mm (D) × 1.70 mm (E) × 0.30 mm (b lead width); weight ≈ 0.0049 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail in shunt regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input supply; clamps voltage to VZ when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance and stable long-term parametric performance |
| AEC-Q101 qualification | Validates reliability for automotive electronics operating from −40°C to +125°C ambient |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC J-STD-020 Level 1 requirements without post-process baking |
| Low capacitance (~15 pF) | Minimizes signal coupling in high-frequency voltage clamp or reference applications |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protects microcontroller I/O and analog front-end inputs from transients on 24 V vehicle battery rails. IC Role / Device Role / Timing Role: Shunt voltage clamp absorbing surge energy while holding rail below IC absolute maximum rating. Use Value: Limits peak voltage to ≤23.3 V during load dump, preventing latch-up or oxide damage in downstream ASICs. | Use Scenario: Provides stable 22 V reference for precision RTD or strain gauge excitation in factory automation modules. IC Role / Device Role / Timing Role: Passive voltage reference source for ratiometric ADC biasing and gain-setting networks. Use Value: Delivers ±5% regulation accuracy with <0.1 µA leakage, minimizing offset error in 24-bit measurement systems. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Protection |
Use Scenario: Sets secondary-side feedback threshold in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener-based optocoupler drive threshold defining output voltage setpoint. Use Value: Enables 22 V trigger point with 55 Ω dynamic impedance, ensuring tight output regulation (<±1.5%) across line/load. | Use Scenario: Guards analog acquisition channels in portable ultrasound units against ESD and defibrillator-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (15 pF) transient suppressor on signal path inputs prior to instrumentation amplifier. Use Value: Clamps >8 kV HBM ESD events without distorting 1–15 MHz echo signals due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247B-TP (Micro Commercial) | 22 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Larger footprint; higher power enables higher surge absorption but reduces board density | Select when higher pulse energy handling is required and SOD-123 layout is already established |
| BZX84-C22 (Nexperia) | 22 V nominal, ±5% tolerance, 300 mW PD, SOT-23 package, no AEC-Q101 | SOT-23 offers better thermal dissipation but lacks automotive qualification | Prefer for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with MMSZ5247B-TP and BZX84-C22, BZT52C22S-7 delivers AEC-Q101 compliance in the smallest footprint (SOD323), making it optimal for space-constrained automotive modules needing guaranteed reliability, while its 200 mW rating balances thermal safety and miniaturization.
Availability
BZT52C22S-7 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, consumer power adapter feedback, and medical diagnostic equipment protection requiring stable component supply and full traceability.
Supply support for BZT52C22S-7 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 BZT52C series belongs to Diodes' automotive-qualified Zener portfolio, designed specifically for robust voltage reference and transient suppression in harsh-environment electronics where AEC-Q101 validation and green material compliance are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C22S-7?
The BZT52C22S-7 exhibits sharp reverse breakdown at 20.8 V minimum and 23.3 V maximum when tested at 5 mA (IZT). Below 20.8 V, reverse leakage remains ≤0.1 µA at 16.4 V, confirming stable non-conducting behavior until reaching the specified zener knee.
Can BZT52C22S-7 be used in place of a 24 V Zener diode?
No - BZT52C22S-7 is rated for 22 V nominal regulation (20.8–23.3 V range), not 24 V. Substituting it for a 24 V part like BZT52C24S would result in premature clamping ~1.7 V lower than intended, potentially causing system malfunction or undervoltage lockout in sensitive circuits.
Is the SOD323 package hand-solderable?
Yes, the SOD323 package is compatible with manual soldering using fine-tip irons and controlled heat profiles; however, Diodes recommends reflow per J-STD-020 Level 1 guidelines. Pad layout must follow the manufacturer's suggested dimensions (X=0.59 mm, Y=0.45 mm) to ensure reliable wetting and mechanical strength.
Does BZT52C22S-7 have a specified junction-to-case thermal resistance?
No - the datasheet specifies only junction-to-ambient thermal resistance (RθJA = 625 °C/W) for a standard FR-4 PCB with recommended pad layout. Junction-to-case (RθJC) is not published, as the SOD323 package lacks a thermal pad or exposed metal for direct case cooling.
BZT52C22S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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:
- SOD-323
BZT52C22S-7 FAQ
1.How can I place an order for BZT52C22S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C22S-7 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 BZT52C22S-7 reliable?
The price and inventory of BZT52C22S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C22S-7 is usually 5 days.
3.What payment methods are accepted for BZT52C22S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C22S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C22S-7?
BZT52C22S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C22S-7 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 BZT52C22S-7?
For technical support, including BZT52C22S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C22S-7 requirements.
6.How does Aetrix verify that BZT52C22S-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C22S-7 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 BZT52C22S-7 meets industry standards.
7.What is the process for return or replacement of BZT52C22S-7?
All BZT52C22S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C22S-7, 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 BZT52C22S-7 part is unused and in its original packaging.
Return procedure for BZT52C22S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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