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Diodes Incorporated BZT585B22T-7
- Part No.:
- BZT585B22T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B22T-7.pdf
- Description:
- DIODE ZENER 22V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
BZT585B22T-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal 22 V breakdown voltage (21.56–22.44 V at 5 mA), ±2.0% tolerance, 350 mW power dissipation, and 55 Ω dynamic impedance at 5 mA. It operates from –65 °C to +150 °C and is AEC-Q101 qualified for automotive-grade reliability in voltage regulation and reference applications.
For engineers reviewing the BZT585B22T-7 datasheet, BZT585B22T-7 pinout, BZT585B22T-7 application, or BZT585B22T-7 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (357 °C/W), low-profile SOD523 package compatibility, and reverse leakage (<0.05 µA at 15.4 V) in low-power biasing circuits.
Technical Context
This Zener diode delivers stable voltage reference under reverse-biased operation with tightly controlled 22 V nominal breakdown. Its 1 mV/°C temperature coefficient (typical) and 60 pF junction capacitance at 0 V support stable performance in analog sensing and feedback loops across industrial temperature ranges.
The device uses a planar epitaxial construction with cathode band marking and matte tin-plated Alloy 42 leads. Its SOD523 package enables high power density (350 mW) in a 1.6 × 0.8 mm footprint, with thermal derating beginning above 25 °C per the published power derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 21.56–22.44 V range at 5 mA - ensures tight regulation tolerance in reference designs |
| Power Dissipation (PD) | 350 mW at TA = 25 °C - supports continuous operation in compact PCB layouts with minimal heatsinking |
| Zener Impedance (ZZT) | 55 Ω at 5 mA - maintains low AC impedance for ripple suppression in low-current bias networks |
| Reverse Leakage (IR) | <0.05 µA at 15.4 V - minimizes quiescent current error in high-impedance voltage references |
| Thermal Resistance (RθJA) | 357 °C/W - defines junction-to-ambient rise per watt; requires FR-4 pad layout per AP02001 for rated performance |
| Operating Temperature | –65 °C to +150 °C - enables use in under-hood automotive and industrial environments without derating |
| Temperature Coefficient | +21.9 mV/°C - positive drift characteristic allows predictable compensation in multi-Zener networks |
Pinout & Package
Package: SOD523 - ultra-compact, flat-lead surface-mount plastic case (1.6 × 0.8 × 0.6 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to lower-potential side in reverse-bias configuration; forms reference return path |
| Cathode (marked with band) | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; provides stable 22 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces calibration overhead in precision voltage references and ADC bias networks |
| AEC-Q101 qualification | Validates reliability for automotive body electronics, infotainment power rails, and sensor interfaces |
| SOD523 package with 0.001 g mass | Enables high-density routing in space-constrained modules such as telematics and ADAS ECUs |
| Lead-free, halogen- and antimony-free "Green" construction | Meets global environmental compliance (RoHS 2, JEDEC J-STD-020 Level 1) without performance trade-offs |
Applications
| Automotive Sensor Reference | Industrial Analog Front-End |
|---|---|
Use Scenario: Providing stable 22 V reference for MEMS pressure sensor excitation in engine control units. IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric signal conditioning circuitry. Use Value: ±2.0% tolerance and +21.9 mV/°C TC enable <1% total reference drift over –40 °C to +125 °C operating range. |
Use Scenario: Biasing op-amp input stages in programmable logic controller (PLC) analog I/O modules. IC Role / Device Role / Timing Role: Low-leakage (0.05 µA) voltage clamp for rail-splitting and offset setting. Use Value: 60 pF capacitance and 55 Ω impedance preserve bandwidth in 100 kHz signal paths without added filtering. |
| Portable Medical Instrumentation | Energy Metering Reference |
Use Scenario: Generating calibrated reference for battery-powered glucose meter ADC front-end. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator supplying 22 V to precision voltage reference ICs. Use Value: 350 mW rating and 357 °C/W RθJA allow operation on 2-layer FR-4 without thermal vias in handheld enclosures. |
Use Scenario: Stabilizing auxiliary supply for metrology SoCs in smart electricity meters. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization for isolated DC-DC feedback loops. Use Value: AEC-Q101 qualification and –65 °C to +150 °C range ensure long-term stability in outdoor metering environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5248BS-7-F | 22 V nominal, ±5% tolerance, 200 mW PD, SOT-323 package (2.1 × 1.3 mm) | Larger footprint, higher leakage (1 µA @ 17.6 V), no AEC-Q101 qualification | Acceptable for cost-sensitive consumer applications where tighter tolerance and automotive reliability are not required |
| BZX84-C22LT1G | 22 V nominal, ±5% tolerance, 300 mW PD, SOT-23 package (3.0 × 1.4 mm) | Higher thermal resistance (~400 °C/W), larger size, unqualified for automotive | Preferred where board space permits and legacy SOT-23 tooling is in place; avoid in high-reliability thermal environments |
Compared with MMBZ5248BS-7-F and BZX84-C22LT1G, BZT585B22T-7 offers superior voltage accuracy, higher power handling in half the footprint, and AEC-Q101 validation-making it the optimal choice for space-constrained, thermally demanding, and automotive-compliant designs.
Availability
BZT585B22T-7 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial analog front-end, portable medical instrumentation, and energy metering reference requiring stable component supply and AEC-Q101 assurance.
Supply support for BZT585B22T-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and regulation in automotive, industrial, and medical applications where tight tolerance and AEC-Q101 reliability are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT585B22T-7?
The BZT585B22T-7 exhibits a nominal Zener voltage of 22 V, with a guaranteed range of 21.56 V to 22.44 V at 5 mA test current. Breakdown begins within this range under reverse bias; operation above 22.44 V at rated current remains within specification but increases power dissipation linearly.
Is BZT585B22T-7 compatible with lead-free reflow soldering profiles?
Yes - BZT585B22T-7 is fully RoHS 2 compliant and qualified for lead-free reflow soldering per JEDEC J-STD-020. Its matte tin finish over Alloy 42 leadframe withstands peak temperatures up to 260 °C for 30 seconds, matching standard Pb-free process requirements.
How does the +21.9 mV/°C temperature coefficient affect circuit design?
The positive temperature coefficient means VZ increases by ~21.9 mV per °C rise in junction temperature. In precision references, this must be compensated via complementary TC components or software calibration - especially critical in applications spanning –40 °C to +125 °C ambient.
Can BZT585B22T-7 replace older Zener diodes like 1N4748A in existing designs?
No - BZT585B22T-7 uses an SOD523 package (1.6 × 0.8 mm) versus the DO-41 (5.2 × 2.7 mm) of 1N4748A. While electrical parameters align closely, mechanical incompatibility and differing thermal behavior (RθJA = 357 °C/W vs ~65 °C/W) require full layout and thermal validation before substitution.
BZT585B22T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT585B22T-7 FAQ
1.How can I place an order for BZT585B22T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B22T-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 BZT585B22T-7 reliable?
The price and inventory of BZT585B22T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B22T-7 is usually 5 days.
3.What payment methods are accepted for BZT585B22T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B22T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B22T-7?
BZT585B22T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B22T-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 BZT585B22T-7?
For technical support, including BZT585B22T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B22T-7 requirements.
6.How does Aetrix verify that BZT585B22T-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B22T-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 BZT585B22T-7 meets industry standards.
7.What is the process for return or replacement of BZT585B22T-7?
All BZT585B22T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B22T-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 BZT585B22T-7 part is unused and in its original packaging.
Return procedure for BZT585B22T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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