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Diodes Incorporated BZT52C22-7
- Part No.:
- BZT52C22-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C22-7.pdf
- Description:
- DIODE ZENER 22V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,367
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Product details
Overview
BZT52C22-7 from Diodes Incorporated is a surface-mount 22 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±5% zener voltage tolerance (20.8–23.3 V), 55 Ω dynamic impedance at 5 mA test current, and 0.1 µA maximum reverse leakage at 16.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power DC supply regulation circuits.
For engineers reviewing the BZT52C22-7 datasheet, BZT52C22-7 pinout, BZT52C22-7 application, or BZT52C22-7 equivalent, key selection criteria include its 22 V nominal breakdown voltage, SOD123 footprint compatibility, thermal resistance (RθJA = 338 °C/W), AEC-Q101 qualification for automotive use, and cathode-band polarity marking.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across load variations and temperature shifts. Its planar die construction ensures consistent breakdown characteristics and long-term stability under repetitive surge conditions.
Designed for general-purpose medium-current regulation, it delivers predictable clamping behavior with a temperature coefficient of +15.4 mV/°C and supports automated SMT assembly due to its matte tin–plated alloy 42 leadframe and J-STD-020 Level 1 moisture sensitivity rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 20.8–23.3 V range at 5 mA - defines precise clamping threshold for 24 V rail protection |
| Power Dissipation | 370 mW at +25°C ambient - limits continuous current to ~16.8 mA at 22 V without heatsinking |
| Zener Impedance (ZZT) | 55 Ω at IZT = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 16.4 V - ensures minimal quiescent current in standby regulation |
| Thermal Resistance (RθJA) | 338 °C/W on FR-4 PCB with 1-inch copper pad - requires derating above +25°C ambient per Fig. 1 |
| Temperature Coefficient | +15.4 mV/°C - enables predictable drift compensation in temperature-stable references |
Pinout & Package
Package: SOD123 - surface-mount plastic case, 0.010 g weight, UL 94V-0 flammability rating, cathode band marking, and matte tin–annealed terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; reverse bias applied between cathode and anode to activate regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; supplies regulated 22 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ tolerance control and repeatable breakdown characteristics across production lots |
| AEC-Q101 qualification | Validates reliability for automotive electronics including infotainment power rails and sensor interface protection |
| SOD123 footprint | Enables high-density PCB layout and compatibility with standard 0805-class pick-and-place equipment |
| Lead-free & halogen-free | Fully RoHS-compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets global environmental compliance mandates |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Power Supervision |
|---|---|
Use Scenario: Stabilizing reference voltage for analog front-end circuitry in temperature/humidity sensors operating from 24 V vehicle battery. IC Role / Device Role / Timing Role: Zener voltage reference providing 22 V clamp to protect ADC input stages during load dump transients. Use Value: Limits input voltage to safe levels using only passive components, eliminating need for active supervisor ICs in cost-sensitive designs. |
Use Scenario: Overvoltage protection for microcontroller reset circuitry in BCMs exposed to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Clamping transient spikes above 22 V to prevent MCU brownout or latch-up during alternator regulation failure. Use Value: Withstands 500 mW peak power for short durations, enabling robust protection without external TVS diode stacking. |
| Consumer IoT Power Rail Regulation | Medical Portable Device Battery Monitoring |
Use Scenario: Providing stable 22 V reference for charge controller feedback in USB-C PD-powered smart home hubs. IC Role / Device Role / Timing Role: Precision shunt regulator setting upper limit for buck converter output in multi-rail power management. Use Value: Maintains ±5% regulation accuracy across -65°C to +150°C, supporting wide ambient operation in unventilated enclosures. |
Use Scenario: Voltage threshold detection in lithium-ion battery pack monitoring circuits for overvoltage alarm triggering. IC Role / Device Role / Timing Role: Zener-based comparator reference ensuring accurate 22 V trip point before cell damage occurs. Use Value: Low 0.1 µA leakage preserves battery life in always-on monitoring modes while delivering reliable trip accuracy. |
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 |
|---|---|---|---|
| MMBZ5246BS-7-F | Same 22 V nominal, but SOT-323 package (smaller footprint, higher RθJA = 400 °C/W) | Limited to lower power (<200 mW) due to thermal constraints; unsuitable for sustained 370 mW operation | Select when board space is critical and power dissipation remains below 150 mW |
| 1N4748A | Through-hole DO-41 package, 1 W rating, ±5% tolerance, 22 V nominal | Requires wave soldering or hand assembly; incompatible with automated SMT lines | Choose only for prototyping or legacy through-hole designs where reflow compatibility is not required |
Compared with MMBZ5246BS-7-F and 1N4748A, BZT52C22-7 uniquely balances SMT manufacturability, 370 mW continuous power handling at +25°C, and AEC-Q101 qualification-making it optimal for volume automotive and industrial SMT production where reliability and process compatibility are jointly prioritized.
Availability
BZT52C22-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer IoT power supervision requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZT52C22-7 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, specializing in high-reliability, energy-efficient components for automotive, industrial, and computing markets.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-volume voltage regulation and transient suppression in space-constrained SMT applications.
FAQ
What is the maximum reverse voltage (VR) at which BZT52C22-7 guarantees ≤0.1 µA leakage?
The datasheet specifies 0.1 µA maximum reverse current at VR = 16.4 V. This value is measured under controlled conditions at +25°C and defines the voltage threshold below which leakage remains negligible-critical for low-power standby circuits where quiescent current must be minimized.
Can BZT52C22-7 be used in place of a 24 V Zener diode for overvoltage clamping?
No-it is rated for 22 V nominal breakdown (20.8–23.3 V range). Using it as a 24 V clamp risks premature conduction and inadequate headroom; a BZT52C24-7 (24 V nominal, 22.8–25.6 V range) is the correct replacement for 24 V system protection.
Is the SOD123 package of BZT52C22-7 compatible with IPC-7351B standard footprints?
Yes-the SOD123 outline dimensions (D = 1.40–1.70 mm, E = 2.55–2.85 mm, L = 0.25–0.40 mm) match IPC-7351B "SOD-123" land pattern recommendations, and the suggested pad layout (X = 0.900 mm, X1 = 4.050 mm, Y = 0.950 mm) aligns with Class L density guidelines for reliable reflow soldering.
Does BZT52C22-7 meet AEC-Q101 requirements for automotive under-hood applications?
Yes-the "-7-F" suffix denotes commercial qualification, but the base BZT52C22 device is AEC-Q101 qualified per DS18004 Rev. 38. For automotive use, specify BZT52C22Q-7-F (automotive-grade variant with extended temperature screening and traceability).
BZT52C22-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±6%
- Power - Max:
- 500 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-123
BZT52C22-7 FAQ
1.How can I place an order for BZT52C22-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C22-7 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 BZT52C22-7 reliable?
The price and inventory of BZT52C22-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C22-7 is usually 5 days.
3.What payment methods are accepted for BZT52C22-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C22-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C22-7?
BZT52C22-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C22-7 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 BZT52C22-7?
For technical support, including BZT52C22-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C22-7 requirements.
6.How does Aetrix verify that BZT52C22-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C22-7 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 BZT52C22-7 meets industry standards.
7.What is the process for return or replacement of BZT52C22-7?
All BZT52C22-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C22-7, 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 BZT52C22-7 part is unused and in its original packaging.
Return procedure for BZT52C22-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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