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Diodes Incorporated BZT585B3V6TQ-13
- Part No.:
- BZT585B3V6TQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B3V6TQ-13.pdf
- Description:
- DIODE ZENER 3.6V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,928
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Product details
Overview
BZT585B3V6TQ from Diodes Incorporated is a precision Zener diode with 3.6 V nominal breakdown voltage (±2.0% tolerance), 90 Ω maximum Zener impedance at 5 mA, -1.9 mV/°C temperature coefficient, and 350 mW power dissipation in SOD523 package-used for voltage regulation and reference in automotive sensor signal conditioning circuits.
For engineers reviewing the BZT585B3V6TQ datasheet, BZT585B3V6TQ pinout, BZT585B3V6TQ application, or BZT585B3V6TQ equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal derating behavior, and direct replacement guidance for low-voltage reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across load variations and temperature shifts. Its -1.9 mV/°C temperature coefficient ensures predictable drift in automotive ambient ranges (-65°C to +150°C), and its 90 Ω dynamic impedance at IZT = 5 mA supports tight regulation under moderate current loads.
The device uses alloy-42 leadframe with matte tin annealed finish for solderability and reliability, and its SOD523 package enables high power density (350 mW) in a 1.25 mm × 0.85 mm footprint-critical for space-constrained engine control unit (ECU) and body electronics PCBs.
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 for noise and tolerance stack-up. |
| Zener Impedance (ZZT) | 90 Ω max at 5 mA-limits output voltage variation to < ±45 mV under ±4.5 mA load change. |
| Temperature Coefficient | -1.9 mV/°C-predictable negative drift allows compensation in analog front-end references. |
| Power Dissipation | 350 mW at 25°C ambient-supports continuous operation up to +105°C with linear derating per Figure 1. |
| Reverse Leakage (IR) | 5 µA max at 1 V reverse bias-ensures minimal quiescent current in always-on monitoring circuits. |
| Capacitance (CT) | 390 pF at 0 V, 1 MHz-low enough to avoid signal integrity issues in DC-coupled sensor bias networks. |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), flat lead design, cathode indicated by band marking, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or low-impedance return path; defines reference potential for regulated output. |
| Cathode | Zener breakdown terminal / regulated voltage output node | Provides stable 3.6 V output when reverse-biased; must be connected to supply rail or feedback node requiring voltage clamping. |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces need for post-production calibration in automotive sensor modules where 3.3 V ADC reference stability is critical. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in powertrain and chassis ECUs without additional qualification. |
| SOD523 package with 350 mW rating | Delivers 2.5× higher power density than standard SOD-323, enabling robust regulation in compact ADAS camera modules. |
| Matte tin annealed terminals | Ensures consistent solder wetting and intermetallic formation on ENIG and immersion silver PCB finishes used in automotive production. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Current-Sense Reference |
|---|---|
Use Scenario: Stabilizing 3.3 V reference for microcontroller ADC inputs measuring throttle position sensor signals. IC Role / Device Role / Timing Role: Precision voltage reference diode providing stable bias point for ratiometric sensor scaling. Use Value: Maintains ADC accuracy within ±0.5 LSB over -40°C to +125°C due to matched TC and low ZZT. |
Use Scenario: Setting reference voltage for op-amp-based shunt current monitor in motor drive power stage. IC Role / Device Role / Timing Role: Low-drift Zener reference establishing fixed gain-setting node for differential amplifier. Use Value: Enables < ±1% full-scale current measurement error across 0–85°C ambient with no external trimming. |
| USB-C Power Delivery Monitor | Medical Sensor Signal Conditioning |
Use Scenario: Clamping CC line voltage during USB PD negotiation to prevent overvoltage damage to controller GPIO. IC Role / Device Role / Timing Role: Overvoltage protection element limiting CC pin to safe 3.6 V threshold. Use Value: Responds within <100 ns to transient spikes while maintaining <5 µA leakage during normal 0.5–2.0 V signaling. |
Use Scenario: Providing excitation voltage for bridge-based strain gauge in portable blood pressure cuff. IC Role / Device Role / Timing Role: Low-noise, low-drift reference source for Wheatstone bridge biasing. Use Value: Contributes <0.02% FS error to overall pressure reading via -1.9 mV/°C TC and 90 Ω ZZT stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4684T1G | 3.6 V nominal, ±5% tolerance, 150 Ω ZZT, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint, looser tolerance, higher impedance-suitable only for non-critical biasing. | Select when board space permits larger package and ±5% regulation is acceptable. |
| BZX84-C3V6 | 3.6 V nominal, ±5% tolerance, 90 Ω ZZT, SOT-23 package (3.0 mm × 1.4 mm) | Higher profile, same ZZT, but not AEC-Q101 qualified-requires customer qualification for automotive use. | Select for industrial prototypes where AEC-Q101 is not mandated and SOT-23 pick-and-place compatibility exists. |
Compared with MMSZ4684T1G and BZX84-C3V6, BZT585B3V6TQ offers tighter voltage tolerance, automotive qualification, and smallest footprint-making it optimal for production-grade automotive and space-constrained medical sensors where regulation precision and reliability are non-negotiable.
Availability
BZT585B3V6TQ is available at Aetrix Electronics and suitable for automotive ECU designs, industrial current-sense modules, USB-C PD protection circuits, and medical sensor signal conditioners requiring stable component supply with full traceability and long-term lifecycle support.
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-with ISO/TS 16949 and IATF16949:2016 certified manufacturing.
The BZT585 series targets precision voltage reference needs in harsh-environment applications, with design focus on AEC-Q101 compliance, low-profile packaging, and tight parametric control for next-generation automotive electronics.
FAQ
What is the maximum reverse current (IR) specification for BZT585B3V6TQ at 1 V?
The maximum reverse current is 5 µA at 1 V reverse bias, measured at 25°C ambient. This low leakage ensures minimal loading on high-impedance sensor bias networks and preserves battery life in always-on automotive modules such as tire pressure monitoring systems.
Is BZT585B3V6TQ qualified for automotive applications?
Yes-BZT585B3V6TQ is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949:2016 certified facilities. It meets automotive change control requirements and has passed stress tests including HTGB, HTRB, and temperature cycling per AEC-Q101 Rev D.
What is the thermal resistance (RθJA) of BZT585B3V6TQ on FR-4 PCB?
The typical junction-to-ambient thermal resistance is 357°C/W when mounted on FR-4 PCB using Diodes' recommended minimum pad layout. Derating begins above 25°C ambient, with full 350 mW power allowed only at ≤25°C and linear reduction to zero at 150°C.
How does the -1.9 mV/°C temperature coefficient affect circuit performance?
This negative temperature coefficient causes the Zener voltage to decrease by 1.9 mV per °C rise. In 3.3 V reference designs, it counteracts positive TC elements (e.g., op-amp input offset), enabling net-zero drift configurations when paired with complementary components.
BZT585B3V6TQ-13 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-13 FAQ
1.How can I place an order for BZT585B3V6TQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B3V6TQ-13 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-13 reliable?
The price and inventory of BZT585B3V6TQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B3V6TQ-13 is usually 5 days.
3.What payment methods are accepted for BZT585B3V6TQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B3V6TQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B3V6TQ-13?
BZT585B3V6TQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B3V6TQ-13 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-13?
For technical support, including BZT585B3V6TQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B3V6TQ-13 requirements.
6.How does Aetrix verify that BZT585B3V6TQ-13 is sourced from the original manufacturer or authorized distributors?
All BZT585B3V6TQ-13 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-13 meets industry standards.
7.What is the process for return or replacement of BZT585B3V6TQ-13?
All BZT585B3V6TQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B3V6TQ-13, 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-13 part is unused and in its original packaging.
Return procedure for BZT585B3V6TQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT585B3V6TQ-13 Tags
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