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Diodes Incorporated BZT585B15T-7
- Part No.:
- BZT585B15T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B15T-7.pdf
- Description:
- DIODE ZENER 15V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,724
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Product details
Overview
BZT585B15T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 15 V breakdown voltage (14.7–15.3 V), ±2.0% tolerance, 350 mW power dissipation, and SOD523 package. It regulates voltage in low-power analog references, overvoltage protection circuits, and sensor biasing where stable 15 V clamping is required.
For engineers reviewing the BZT585B15T-7 datasheet, BZT585B15T-7 pinout, BZT585B15T-7 application, or BZT585B15T-7 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at 5 mA, temperature coefficient, reverse leakage at 10.5 V, and thermal resistance in SOD523 layout.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon. Its 15 V nominal Zener voltage is specified at 5 mA test current (IZT), with typical Zener impedance of 15 Ω at IZT and 200 Ω at knee current (IZK = 1 mA).
The diode exhibits a positive temperature coefficient of +13.2 mV/°C, indicating increasing breakdown voltage with rising junction temperature. It is rated for operation from –65 °C to +150 °C and features a cathode band marking for polarity identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.0 V nominal, 14.7–15.3 V range at IZT = 5 mA - ensures tight regulation in reference circuits |
| Zener Impedance (ZZT) | 15 Ω at IZT = 5 mA - low dynamic resistance minimizes output voltage variation under load changes |
| Power Dissipation (PD) | 350 mW at TA = 25 °C - defines maximum continuous DC power handling on standard FR-4 PCB |
| Temperature Coefficient (TC) | +13.2 mV/°C at IZT = 5 mA - quantifies drift rate; requires thermal design margin for high-accuracy applications |
| Reverse Leakage (IR) | 0.05 µA max at VR = 10.5 V - ultra-low leakage preserves battery life and signal integrity in high-impedance nodes |
| Thermal Resistance (RθJA) | 357 °C/W - determines junction-to-ambient temperature rise per watt; guides PCB copper area requirements |
| Capacitance (CT) | 100 pF max at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in RF-adjacent circuits |
Pinout & Package
Package: SOD523 - ultra-small, low-profile surface-mount plastic case (1.6 × 0.8 × 0.6 mm), optimized for space-constrained PCBs and automated assembly. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference point | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connected to regulated voltage rail or feedback node |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Enables precise 15 V reference without post-manufacturing trimming in cost-sensitive designs |
| SOD523 package with 0.001 g mass | Supports high-density layouts and reflow-compatible assembly while minimizing board stress |
| AEC-Q101 qualified reliability | Validated for automotive electronics including infotainment power rails and sensor interfaces |
| Halogen- and antimony-free "Green" construction | Meets strict environmental compliance (Br+Cl <1500 ppm, Sb <1000 ppm) for global market access |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable 15 V bias to MEMS pressure sensors in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference for sensor excitation circuitry. Use Value: ±2.0% tolerance and +13.2 mV/°C TC enable calibrated output across –40 °C to +125 °C ambient. | Use Scenario: Generating fixed 15 V reference for 12-bit ADC front-end in programmable logic controllers. IC Role / Device Role / Timing Role: Low-drift Zener shunt regulator for analog subsystem power domain. Use Value: 15 Ω dynamic impedance ensures <10 mV output shift under 1 mA load transients. |
| USB-C Power Negotiation Clamp | IoT Node Overvoltage Protection |
Use Scenario: Clamping CC line voltage during USB PD communication handshake to prevent controller damage. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp protecting Type-C port PHY. Use Value: 0.05 µA IR at 10.5 V prevents signal distortion while maintaining fast turn-on during 15 V surges. | Use Scenario: Protecting 3.3 V microcontroller GPIOs from accidental 15 V miswiring in smart meter terminals. IC Role / Device Role / Timing Role: Standby-mode transient suppressor with minimal quiescent current draw. Use Value: SOD523 footprint allows placement directly at connector interface with <1 mm trace length. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245B-7-F | 15 V nominal, ±5% tolerance, 225 mW PD, SOT-23 package | Larger footprint, higher leakage (1 µA @ 12 V), less stable TC | Select when cost is primary and tighter voltage tolerance is not required |
| BZX84-C15-7-F | 15 V nominal, ±5% tolerance, 300 mW PD, SOT-23 package | Higher ZZT (30 Ω), no AEC-Q101 qualification, wider VZ spread | Choose for non-automotive consumer applications with relaxed accuracy needs |
Compared with MMBZ5245B-7-F and BZX84-C15-7-F, BZT585B15T-7 delivers superior voltage accuracy (±2.0% vs. ±5%), higher power rating (350 mW), and automotive-grade reliability-justifying its use where regulation stability and long-term field performance are critical.
Availability
BZT585B15T-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference design, and IoT node overvoltage protection requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for BZT585B15T-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 BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage regulation and clamping in space-constrained, thermally demanding environments such as automotive and industrial electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT585B15T-7 has a nominal Zener voltage of 15 V, with guaranteed breakdown occurring between 14.7 V and 15.3 V at 5 mA test current. It is not rated for sustained reverse voltage above 15.3 V; operation beyond this risks uncontrolled conduction or thermal runaway unless current-limited.
Does this Zener diode require a series resistor in all applications?
Yes - a current-limiting resistor is mandatory to prevent thermal destruction. At 350 mW max dissipation and 15 V Zener voltage, the absolute maximum average current is 23.3 mA. The resistor must be sized to ensure IZ remains within 1–20 mA for optimal impedance and stability, especially under worst-case input voltage and temperature conditions.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - the SOD523 package is qualified for lead-free reflow per JEDEC J-STD-020, with moisture sensitivity level 1. It supports peak temperatures up to 260 °C and is compatible with standard Pb-free reflow profiles (e.g., IPC/JEDEC J-STD-020D), provided recommended pad layout (AP02001) and thermal relief are followed.
How does the +13.2 mV/°C temperature coefficient affect circuit accuracy?
This positive TC means the Zener voltage increases by ~13.2 mV per °C rise in junction temperature. Over a 100 °C range (–40 °C to +60 °C ambient), that introduces ~1.32 V drift - requiring derating, thermal isolation, or compensation in precision references. For non-critical clamping, it's typically acceptable.
BZT585B15T-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT585B15T-7 FAQ
1.How can I place an order for BZT585B15T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B15T-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 BZT585B15T-7 reliable?
The price and inventory of BZT585B15T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B15T-7 is usually 5 days.
3.What payment methods are accepted for BZT585B15T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B15T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B15T-7?
BZT585B15T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B15T-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 BZT585B15T-7?
For technical support, including BZT585B15T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B15T-7 requirements.
6.How does Aetrix verify that BZT585B15T-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B15T-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 BZT585B15T-7 meets industry standards.
7.What is the process for return or replacement of BZT585B15T-7?
All BZT585B15T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B15T-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 BZT585B15T-7 part is unused and in its original packaging.
Return procedure for BZT585B15T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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