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Diodes Incorporated BZT52HC22WF-7
- Part No.:
- BZT52HC22WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC22WF-7.pdf
- Description:
- DIODE ZENER 22V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
BZT52HC22WF-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 22 V (20.8–23.3 V range at 5 mA), 375 mW power dissipation on standard FR-4 PCB, and SOD123F (Type B) package. It provides precise voltage regulation in low-power biasing, overvoltage protection, and reference circuits for automotive control modules and industrial sensor interfaces.
For engineers reviewing the BZT52HC22WF-7 datasheet, BZT52HC22WF-7 pinout, BZT52HC22WF-7 application, or BZT52HC22WF-7 equivalent, this device is selected for stable 22 V clamping in space-constrained designs requiring AEC-Q101 qualification, low-profile mounting, and <100 ppm/°C temperature coefficient stability under 5 mA test current.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its cathode–anode terminals. Its 22 V nominal zener voltage is specified at IZT = 5 mA, with maximum zener impedance of 25 Ω at that current and 220 Ω at IZK = 1 mA.
Thermal performance depends on PCB layout: RθJA is 330 °C/W with minimum pad area, improving to 150 °C/W with 1 cm² cathode pad. The device exhibits a positive temperature coefficient of +16.4 mV/°C, enabling predictable drift compensation in multi-diode reference strings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.8–23.3 V at 5 mA - defines clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 375 mW (FR-4, min pad) - sets max continuous power in standard layouts without thermal derating |
| Zener Impedance (ZZT) | 25 Ω at 5 mA - determines regulation accuracy under dynamic load changes |
| Reverse Leakage (IR) | 0.05 µA at 15.4 V - ensures minimal quiescent current in high-impedance bias networks |
| Capacitance (CT) | 60 pF at 1 MHz, 0 V - impacts high-frequency noise filtering and transient response |
| Temp. Coefficient (TC) | +16.4 mV/°C - enables predictable voltage drift for temperature-compensated references |
| Package | SOD123F (Type B), 3.5 mm × 1.8 mm × 1.15 mm - supports automated placement and 0.8 mm pitch routing |
Pinout & Package
SOD123F (Type B) is a flat-lead, surface-mount plastic package with cathode band marking on the top surface. The device has two terminals: anode (unmarked end) and cathode (band-marked end). Polarity is unambiguous and critical for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; forms reference return path |
| Cathode | Reverse-bias input / regulated output node | Connected to supply rail or signal node requiring clamping; voltage develops across cathode–anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements (HTOL, TCT, ESD) |
| Green compound (halogen/antimony-free) | UL 94V-0 rated molding with Br+Cl <1500 ppm - meets automotive and industrial RoHS+ compliance |
| Low-profile SOD123F package | Height ≤1.15 mm - enables use in ultra-thin modules and stacked PCB assemblies |
| Cathode band polarity marking | Visible top-side band - eliminates orientation errors during automated optical inspection (AOI) |
| Matte tin annealed terminals | Solderable per MIL-STD-202 Method 208 - ensures reliable reflow joint formation on OSP and ENIG finishes |
Applications
| Automotive Body Control Module | Industrial Current-Sense Reference |
|---|---|
|
Use Scenario: Voltage clamping on LIN bus transceiver supply rail subject to load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener clamp protecting 24 V-rated transceiver IC inputs from overvoltage events. Use Value: 22 V breakdown prevents damage while allowing normal 12 V/24 V operation; SOD123F footprint fits tight board spacing near connector. |
Use Scenario: Precision shunt reference for 4–20 mA loop transmitter using op-amp feedback. IC Role / Device Role / Timing Role: Stable 22 V reference source for DAC output scaling and current-loop calibration. Use Value: +16.4 mV/°C TC enables predictable drift compensation; 25 Ω ZZT minimizes error under varying loop load. |
| Medical Sensor Signal Conditioning | Smart Meter Power Supply Monitoring |
|
Use Scenario: Overvoltage protection for analog front-end inputs in portable ECG amplifiers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage (0.05 µA) clamp preventing ADC saturation during ESD events. Use Value: 60 pF capacitance avoids signal distortion at biopotential frequencies; SOD123F allows placement directly at connector entry point. |
Use Scenario: Undervoltage/overvoltage detection in 3-phase smart meter auxiliary power supply monitoring. IC Role / Device Role / Timing Role: Zener-based comparator reference for microcontroller ADC sampling of DC bus voltage. Use Value: AEC-Q101 qualification ensures reliability in field-deployed meters; 375 mW rating supports sustained 22 V hold during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247B-7-F (Diodes Inc.) | Same 22 V nominal, but SOD123 (not SOD123F); 500 mW PD on larger pad; higher ZZT = 35 Ω | Requires larger PCB area; better for higher-power clamping where height >1.15 mm is acceptable | Select when thermal margin >150 mW is needed and board height constraint is relaxed |
| BZX84-C22 (Nexperia) | SOT23 package; 22 V, 250 mW; ZZT = 50 Ω; no AEC-Q101 qualification | Higher profile (1.3 mm), lower power rating, and non-automotive qualification limit use to commercial-grade systems | Choose only for cost-sensitive consumer applications where AEC-Q101 and low height are not required |
Compared with MMSZ5247B-7-F and BZX84-C22, BZT52HC22WF-7 uniquely combines AEC-Q101 qualification, 1.15 mm max height, and 25 Ω zener impedance - making it optimal for automotive and space-constrained industrial voltage references where reliability and precision coexist.
Availability
BZT52HC22WF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial current-sense references, medical sensor signal conditioning, and smart meter power supply monitoring requiring stable component supply and AEC-Q101 assurance.
Supply support for BZT52HC22WF-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, with design and manufacturing operations across Asia and the Americas.
The BZT52HC series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, green packaging, and consistent low-profile performance.
FAQ
What is the maximum reverse voltage before breakdown for BZT52HC22WF-7?
The BZT52HC22WF-7 has a guaranteed zener voltage range of 20.8 V to 23.3 V at 5 mA test current. Breakdown begins within this window; operation above 23.3 V at rated current risks exceeding power limits. Absolute maximum reverse voltage is not defined beyond the zener range - sustained voltage >23.3 V requires current limiting to stay within 375 mW derated power.
Is BZT52HC22WF-7 compatible with lead-free reflow profiles?
Yes. BZT52HC22WF-7 uses matte tin-annealed terminals qualified per J-STD-020 moisture sensitivity Level 1 and supports standard Pb-free reflow profiles (peak 260 °C, 10–30 sec). Its SOD123F package withstands thermal cycling without delamination due to UL 94V-0 green molding compound and optimized leadframe adhesion.
How does the +16.4 mV/°C temperature coefficient affect circuit design?
The positive temperature coefficient means VZ increases ~16.4 mV per °C rise in junction temperature. In precision references, this drift must be compensated - e.g., by pairing with a negative-TC diode or using temperature-aware calibration. In overvoltage clamps, it provides inherent headroom expansion at elevated ambient temperatures.
Can BZT52HC22WF-7 replace older BZT52C22 parts in existing designs?
Yes, with verification. BZT52HC22WF-7 offers identical 22 V zener voltage but improves on legacy BZT52C22 with AEC-Q101 qualification, halogen-free construction, and tighter ZZT (25 Ω vs. typical 40–50 Ω). Mechanical fit is identical in SOD123F, but layout should confirm cathode band alignment matches existing silkscreen.
BZT52HC22WF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5.68%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC22WF-7 FAQ
1.How can I place an order for BZT52HC22WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC22WF-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 BZT52HC22WF-7 reliable?
The price and inventory of BZT52HC22WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC22WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC22WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC22WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC22WF-7?
BZT52HC22WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC22WF-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 BZT52HC22WF-7?
For technical support, including BZT52HC22WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC22WF-7 requirements.
6.How does Aetrix verify that BZT52HC22WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC22WF-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 BZT52HC22WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC22WF-7?
All BZT52HC22WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC22WF-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 BZT52HC22WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC22WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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