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Diodes Incorporated BZT585B9V1T-7
- Part No.:
- BZT585B9V1T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B9V1T-7.pdf
- Description:
- DIODE ZENER 9.1V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:17,596
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Product details
Overview
BZT585B9V1T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 9.1 V breakdown voltage, ±2.0% tolerance, 350 mW power dissipation, and SOD523 package. It regulates voltage in low-power analog references, overvoltage protection circuits, and biasing networks for industrial sensors and automotive control modules.
For engineers reviewing the BZT585B9V1T-7 datasheet, BZT585B9V1T-7 pinout, BZT585B9V1T-7 application, or BZT585B9V1T-7 equivalent, key selection criteria include Zener voltage accuracy (8.92–9.28 V at 5 mA), low dynamic impedance (10 Ω at IZT), temperature coefficient (+5.8 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 10 Ω Zener impedance at 5 mA ensures minimal output variation across current changes, while the +5.8 mV/°C temperature coefficient enables predictable drift compensation in mid-voltage reference designs.
The device uses a planar epitaxial construction with cathode band marking and matte tin-plated Alloy 42 leads. Its SOD523 package delivers high power density (350 mW) in a 1.6 × 0.8 mm footprint, with thermal resistance of 357 °C/W on FR-4 PCB using recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.92–9.28 V range at 5 mA - defines precise regulation point for 9 V rail clamping or reference generation |
| Zener Impedance (ZZT) | 10 Ω at 5 mA - ensures <10 mV output shift per 1 mA load change, critical for stable analog sensing |
| Power Dissipation (PD) | 350 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Temperature Coefficient (TC) | +5.8 mV/°C - enables predictable positive drift correction in temperature-compensated references |
| Reverse Current (IR) | 0.5 µA max at 6.3 V - guarantees low leakage in high-impedance bias networks |
| Capacitance (CT) | 120 pF at 1 MHz, 0 V - limits high-frequency noise coupling in signal conditioning paths |
| Forward Voltage (VF) | 0.9 V at 10 mA - allows use as low-drop clamp in bidirectional protection schemes |
Pinout & Package
Package: SOD523 - ultra-compact 1.6 mm × 0.8 mm surface-mount plastic case with flat lead profile, UL 94V-0 rated molding compound, and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; forms reference return path during regulation |
| Cathode | Reverse breakdown terminal / Zener voltage output | Connected to regulated node; supplies stable 9.1 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Enables single-supply 9 V reference without post-calibration in factory-set instrumentation |
| AEC-Q101 qualified | Validated for automotive engine control units and body electronics requiring extended temperature (-65°C to +150°C) reliability |
| SOD523 package with 350 mW rating | Delivers 2.5× higher power density than standard SOD-123, enabling miniaturized power management in space-constrained modules |
| Halogen- and antimony-free "Green" construction | Meets IPC-1752A material declaration requirements for RoHS 2 and ELV compliance in global automotive supply chains |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine coolant temperature modules. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling and sensor bridge biasing. Use Value: ±2.0% VZ tolerance eliminates need for trimming resistors, reducing BOM count and calibration steps in Tier-1 production. |
Use Scenario: Generating fixed 9.1 V reference for 12-bit SAR ADCs in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Low-drift Zener shunt regulator establishing accurate full-scale input range. Use Value: 10 Ω ZZT minimizes code-to-code variation under varying digital switching noise, improving measurement repeatability. |
| USB Port Overvoltage Protection | Low-Power MCU Reset Circuit |
Use Scenario: Clamping transient surges on USB VBUS lines in portable medical devices. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting voltage to 9.28 V during ESD events. Use Value: 0.5 µA reverse leakage at 6.3 V prevents battery drain in always-on wearable systems with USB charging. |
Use Scenario: Generating clean reset threshold for 32-bit ARM Cortex-M microcontrollers in smart meters. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering POR (power-on reset) at 9.1 V ±2%. Use Value: +5.8 mV/°C TC aligns with silicon bandgap drift, maintaining consistent reset margin across -40°C to +125°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5240B-7-F | 9.1 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Higher power but looser tolerance; requires external trimming for precision references | Select when board space allows larger SOD-123 and cost sensitivity outweighs voltage accuracy needs |
| BZX84-C9V1 | 9.1 V nominal, ±5% tolerance, 300 mW rating, SOT-23 package | Higher leakage (1 µA @ 7.2 V), no AEC-Q101 qualification | Choose only for non-automotive consumer applications where qualification and leakage are non-critical |
Compared with MMSZ5240B-7-F and BZX84-C9V1, BZT585B9V1T-7 offers tighter voltage tolerance and automotive qualification in the smallest footprint, making it optimal for space-constrained, high-reliability 9 V reference designs where accuracy and qualification drive component selection.
Availability
BZT585B9V1T-7 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and USB-powered medical devices requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT585B9V1T-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 centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.
The BZT585 series belongs to Diodes' precision Zener portfolio designed specifically for automotive and industrial applications demanding tight voltage tolerance, AEC-Q101 qualification, and high-reliability packaging in miniature footprints.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZT585B9V1T-7 has a nominal Zener voltage of 9.1 V with a guaranteed range of 8.92 V to 9.28 V at 5 mA test current. Breakdown occurs within this range under specified test conditions; operation above 9.28 V risks exceeding power dissipation limits unless current is strictly limited by external series resistance.
Is this part suitable for use in automotive powertrain applications?
Yes - the BZT585B9V1T-7 is qualified to AEC-Q101 standards and rated for operation from -65°C to +150°C junction temperature. Its SOD523 package, halogen-free construction, and ±2.0% voltage tolerance meet requirements for engine control unit (ECU) voltage monitoring and sensor biasing circuits.
How does the +5.8 mV/°C temperature coefficient affect circuit performance?
This positive temperature coefficient means the Zener voltage increases by approximately 5.8 mV per degree Celsius rise in junction temperature. In precision references, this drift must be compensated - for example, by pairing with a negative-TC component or using it in temperature-stable ambient zones like cabin control modules.
Can this Zener be used in place of a 9 V battery replacement circuit?
No - while its nominal voltage matches a 9 V battery, the BZT585B9V1T-7 is a shunt regulator requiring a current-limiting resistor and cannot source significant load current. It is intended for low-current reference or protection, not primary power substitution.
BZT585B9V1T-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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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-523
BZT585B9V1T-7 FAQ
1.How can I place an order for BZT585B9V1T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B9V1T-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 BZT585B9V1T-7 reliable?
The price and inventory of BZT585B9V1T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B9V1T-7 is usually 5 days.
3.What payment methods are accepted for BZT585B9V1T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B9V1T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B9V1T-7?
BZT585B9V1T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B9V1T-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 BZT585B9V1T-7?
For technical support, including BZT585B9V1T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B9V1T-7 requirements.
6.How does Aetrix verify that BZT585B9V1T-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B9V1T-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 BZT585B9V1T-7 meets industry standards.
7.What is the process for return or replacement of BZT585B9V1T-7?
All BZT585B9V1T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B9V1T-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 BZT585B9V1T-7 part is unused and in its original packaging.
Return procedure for BZT585B9V1T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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