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Diodes Incorporated BZT585B3V6TQ-7
- Part No.:
- BZT585B3V6TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B3V6TQ-7.pdf
- Description:
- DIODE ZENER 3.6V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
BZT585B3V6TQ from Diodes Incorporated is a precision Zener diode designed for voltage regulation and reference applications in automotive and industrial circuits. It delivers a nominal 3.6 V breakdown voltage with ±2.0% tolerance, 90 Ω dynamic impedance at 5 mA test current, and -1.9 mV/°C temperature coefficient. Its SOD523 package supports compact, high-reliability designs in power supply feedback loops and sensor biasing.
For engineers reviewing the BZT585B3V6TQ datasheet, BZT585B3V6TQ pinout, BZT585B3V6TQ application, or BZT585B3V6TQ equivalent, key selection criteria include Zener voltage accuracy, thermal stability, low capacitance (390 pF), AEC-Q101 qualification, and SOD523 footprint compatibility in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage under varying load and temperature conditions. Its -1.9 mV/°C temperature coefficient ensures predictable drift across -65°C to +150°C, and its 390 pF junction capacitance minimizes signal coupling in high-frequency sensing nodes.
The device is rated for 350 mW power dissipation on FR-4 PCB with standard pad layout, and exhibits 1 µA maximum reverse leakage at 1 V, enabling low-power standby regulation. Its cathode-band marking and matte tin-plated Alloy 42 leadframe ensure reliable solderability and traceable sourcing per IATF16949:2016 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal, 3.53–3.67 V range at 5 mA - enables precise 3.3 V rail clamping with margin |
| Zener Impedance (ZZT) | 90 Ω at 5 mA - limits output voltage variation under load transients |
| Temperature Coefficient | -1.9 mV/°C - predicts predictable downward drift over temperature |
| Junction Capacitance | 390 pF at 1 MHz, 0 V - preserves signal integrity in analog front-ends |
| Max Reverse Current | 5 µA at 1 V - ensures minimal quiescent power loss in battery-backed circuits |
| Power Dissipation | 350 mW - supports continuous operation in ambient up to +125°C with derating |
| Operating Temp Range | -65°C to +150°C - meets extended automotive under-hood requirements |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case (0.85 mm × 1.25 mm × 0.65 mm), halogen- and antimony-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node during regulation; used for forward-bias protection checks |
| Cathode | Zener breakdown terminal | Marked with band; connected to regulated voltage node; carries reverse current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces need for post-assembly calibration in voltage reference circuits |
| AEC-Q101 qualified | Validated for automotive electronics including infotainment power rails and ADAS sensor supplies |
| SOD523 low-profile package | Enables placement adjacent to fine-pitch ICs without shadowing or reflow interference |
| 350 mW power rating with 357°C/W RθJA | Supports sustained regulation in thermally constrained modules without heatsinking |
| Matte tin annealed terminals | Ensures robust solder joint formation and long-term intermetallic stability |
Applications
| Automotive Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protecting 3.3 V microcontroller I/O pins against load-dump transients in body control modules. IC Role / Device Role / Timing Role: Zener clamp limiting voltage excursions to ≤4.0 V during 12 V system surges. Use Value: Prevents latch-up and ESD damage while maintaining signal fidelity due to 390 pF capacitance and fast response. | Use Scenario: Providing stable bias voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation. Use Value: Enables <±0.5% measurement accuracy over -40°C to +105°C using -1.9 mV/°C TC and tight 3.6 V tolerance. |
| USB-C Port Overvoltage Protection | Low-Power IoT Node Voltage Supervisor |
Use Scenario: Safeguarding USB-C data line receivers from accidental 5 V misconnection in portable docking stations. IC Role / Device Role / Timing Role: Fast-acting shunt regulator clamping D+ and D- lines to 3.6 V. Use Value: Limits fault energy with 5 µA leakage at 1 V and 90 Ω dynamic impedance, preserving signal integrity. | Use Scenario: Monitoring coin-cell voltage in BLE-enabled asset trackers to trigger low-battery alerts. IC Role / Device Role / Timing Role: Low-current Zener reference feeding comparator input in sleep-mode supervision circuit. Use Value: Draws only 5 µA at 1 V reverse bias, extending 10-year battery life while ensuring accurate 2.8 V threshold detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4685-7-F | 3.6 V nominal, ±5% tolerance, 100 Ω ZZT, SOD-123 package (larger footprint) | Higher voltage tolerance reduces precision in reference designs; larger package limits density | Select when cost priority outweighs accuracy and board space constraints |
| BZX84-C3V6 | 3.6 V nominal, ±5% tolerance, 90 Ω ZZT, SOT-23 package (3-pin, anode/cathode/common) | Requires routing to third pin; not AEC-Q101 qualified; higher thermal resistance | Choose for non-automotive consumer designs where qualification and size are secondary |
Compared with MMSZ4685-7-F and BZX84-C3V6, the BZT585B3V6TQ offers tighter voltage tolerance, automotive qualification, and smallest footprint-making it optimal for space-limited, safety-critical voltage references where long-term stability and regulatory compliance are mandatory.
Availability
BZT585B3V6TQ is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and low-power IoT voltage supervision requiring stable component supply across multi-year production cycles.
Supply support for BZT585B3V6TQ 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 components for automotive, industrial, and computing markets.
The BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for AEC-Q101-compliant voltage regulation and reference applications in harsh-environment electronics.
FAQ
What is the maximum power dissipation for BZT585B3V6TQ under standard PCB conditions?
The BZT585B3V6TQ is rated for 350 mW continuous power dissipation when mounted on an FR-4 PCB using Diodes Incorporated's recommended minimum pad layout. Derating begins above +25°C ambient, reaching zero dissipation at +150°C per the published power derating curve. This rating assumes natural convection cooling without heatsinks or forced airflow.
Is BZT585B3V6TQ suitable for use in automotive engine control units?
Yes - BZT585B3V6TQ is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949:2016 certified facilities. Its -65°C to +150°C operating range, 3.6 V precision, and robust SOD523 package meet requirements for non-safety-critical voltage clamping and biasing in engine control unit power domains.
How does the -1.9 mV/°C temperature coefficient affect circuit performance?
The negative temperature coefficient means the Zener voltage decreases by 1.9 mV per degree Celsius rise. Over a 100°C span, this yields ~190 mV total drift - predictable and linear, allowing compensation in high-accuracy references. It contrasts with positive-coefficient Zeners used in temperature-sensing applications.
What marking code identifies BZT585B3V6TQ on the device body?
The top-side marking for BZT585B3V6TQ is "3J", printed on the SOD523 package. This two-character code corresponds exclusively to the 3.6 V variant within the BZT585B series and is used for visual identification and automated optical inspection during assembly.
BZT585B3V6TQ-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):
- 3.6 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT585B3V6TQ-7 FAQ
1.How can I place an order for BZT585B3V6TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B3V6TQ-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 BZT585B3V6TQ-7 reliable?
The price and inventory of BZT585B3V6TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B3V6TQ-7 is usually 5 days.
3.What payment methods are accepted for BZT585B3V6TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B3V6TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B3V6TQ-7?
BZT585B3V6TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B3V6TQ-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 BZT585B3V6TQ-7?
For technical support, including BZT585B3V6TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B3V6TQ-7 requirements.
6.How does Aetrix verify that BZT585B3V6TQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B3V6TQ-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 BZT585B3V6TQ-7 meets industry standards.
7.What is the process for return or replacement of BZT585B3V6TQ-7?
All BZT585B3V6TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B3V6TQ-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 BZT585B3V6TQ-7 part is unused and in its original packaging.
Return procedure for BZT585B3V6TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT585B3V6TQ-7 Tags
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