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Diodes Incorporated BZT585B6V8TQ-7
- Part No.:
- BZT585B6V8TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B6V8TQ-7.pdf
- Description:
- DIODE ZENER 6.8V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
BZT585B6V8TQ-7 from Diodes Incorporated is a precision Zener diode designed for voltage regulation and reference in space-constrained automotive and industrial circuits. It delivers 6.8 V nominal Zener voltage (±2.0% tolerance), 15 Ω dynamic impedance at 5 mA test current, 350 mW power dissipation, and operates across –65°C to +150°C ambient temperature - deployed in ECU power rail clamping and sensor biasing.
For engineers reviewing the BZT585B6V8TQ-7 datasheet, BZT585B6V8TQ-7 pinout, BZT585B6V8TQ-7 application, or BZT585B6V8TQ-7 equivalent, key selection criteria include Zener voltage accuracy, low thermal resistance (357 °C/W), AEC-Q101 qualification, SOD523 package compatibility, and reverse leakage performance at 4 V (≤2 µA).
Technical Context
This device functions as a two-terminal, silicon planar Zener diode operating in reverse breakdown mode. Its ±2.0% voltage tolerance, 3.0 mV/°C positive temperature coefficient at 5 mA, and 215 pF junction capacitance support stable DC reference generation under varying thermal conditions.
The SOD523 package enables high power density with 350 mW dissipation on FR-4 PCBs using minimum pad layout. Cathode band marking and matte tin–annealed Alloy 42 leads ensure reliable solderability per MIL-STD-202, Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V nominal, 6.66–6.94 V range at 5 mA - ensures tight regulation for 5 V and 6.6 V rail monitoring |
| Zener Impedance (ZZT) | 15 Ω at IZT = 5 mA - minimizes output voltage variation under load transients |
| Power Dissipation (PD) | 350 mW at TA = 25°C - supports continuous operation in compact automotive modules without forced cooling |
| Reverse Leakage (IR) | ≤2 µA at VR = 4 V - preserves low quiescent current in battery-backed circuits |
| Thermal Resistance (RθJA) | 357 °C/W - enables thermal design margin up to +105°C ambient with 50°C rise at full power |
| Operating Temperature | –65°C to +150°C - validated for under-hood and transmission control unit environments |
| Junction Capacitance (CT) | 215 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in analog signal paths |
Pinout & Package
Package: SOD523 - ultra-small, low-profile surface-mount plastic case (0.85 mm × 1.25 mm × 0.65 mm), UL 94V-0 rated, moisture sensitivity level 1.
| 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-biased Zener terminal / voltage reference output | Marked with band; supplies regulated 6.8 V when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces need for post-assembly calibration in automotive sensor front-ends |
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, TCT, and HTRB |
| SOD523 package with 0.001 g mass | Enables placement on dense PCBs with minimal board area and thermal mass impact |
| Halogen- and antimony-free "Green" construction | Meets EU RoHS 3 (2015/863/EU) and automotive ELV directive compliance requirements |
| Matte tin–annealed Alloy 42 leads | Ensures consistent wetting and joint reliability in lead-free reflow profiles (J-STD-020) |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial Current Loop Transmitter Reference |
|---|---|
Use Scenario: Monitoring 12 V battery-derived rails for undervoltage detection in engine management systems. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 6.8 V threshold for comparator input. Use Value: ±2.0% tolerance and –65°C to +150°C operation ensure reliable trip point across cold cranking and under-hood thermal extremes. | Use Scenario: Generating a stable reference for 4–20 mA loop transmitter DAC output scaling. IC Role / Device Role / Timing Role: Two-terminal Zener regulator establishing fixed bias for op-amp feedback network. Use Value: 15 Ω impedance and 3.0 mV/°C TC minimize output drift over 0–70°C industrial ambient range. |
| Medical Patient Monitor Sensor Biasing | Consumer IoT Battery Voltage Supervisor |
Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-leakage (≤2 µA @ 4 V) shunt reference ensuring minimal sensor loading error. Use Value: Ultra-low reverse current preserves microamp-level sensor bias accuracy and extends battery life. | Use Scenario: Detecting end-of-life voltage in lithium coin-cell–powered wearables. IC Role / Device Role / Timing Role: Zener clamp referenced to MCU ADC input for programmable brown-out detection. Use Value: SOD523 footprint allows integration into <5 mm² PCB area while maintaining 6.8 V trip consistency across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5235B-7-F | 6.8 V nominal, ±5% tolerance, 350 mW, SOD-123 package (larger footprint, higher RθJA = 460 °C/W) | Less suitable for AEC-Q101–required automotive designs; lacks PPAP capability | Select when cost priority outweighs automotive qualification and space constraints |
| BZX84-C6V8 | 6.8 V nominal, ±5% tolerance, 300 mW, SOT-23 package (3-pin, anode/cathode/common marked) | Requires PCB real estate for third pin; not AEC-Q101 qualified; higher leakage (≤5 µA @ 4 V) | Choose for legacy SOT-23 assembly lines where footprint compatibility is mandatory |
Compared with MMSZ5235B-7-F and BZX84-C6V8, the BZT585B6V8TQ-7 offers tighter voltage tolerance, automotive qualification, and superior thermal performance in the smallest available footprint - making it optimal for next-generation compact, mission-critical regulation tasks.
Availability
BZT585B6V8TQ-7 is available at Aetrix Electronics and suitable for automotive ECU power supervision, industrial 4–20 mA transmitter references, and medical RTD biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT585B6V8TQ-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 automotive-grade voltage reference and regulation in space-limited, thermally demanding environments.
FAQ
What is the maximum reverse voltage before breakdown for BZT585B6V8TQ-7?
The BZT585B6V8TQ-7 exhibits sharp reverse breakdown at 6.66–6.94 V when tested at 5 mA Zener current (IZT). Below 6.66 V, reverse leakage remains ≤2 µA at 4 V; no defined "maximum non-breakdown voltage" is specified - operation below nominal VZ is intended for leakage-sensitive biasing, not regulation.
Is BZT585B6V8TQ-7 compatible with lead-free reflow processes?
Yes. The device uses matte tin–annealed Alloy 42 leads and is qualified per J-STD-020 for moisture sensitivity level 1. It supports standard lead-free reflow profiles (peak 260°C, 10–30 sec above 217°C) without degradation, verified by Diodes Incorporated's internal process validation and MIL-STD-202 solderability testing.
How does the temperature coefficient affect regulation accuracy over temperature?
The BZT585B6V8TQ-7 has a typical temperature coefficient of +3.0 mV/°C at 5 mA. Over a –40°C to +125°C range, this contributes ±0.495 V drift relative to 25°C VZ, resulting in total regulation window of 6.16–7.44 V. System-level compensation may be required for sub-1% accuracy across full temperature range.
Can BZT585B6V8TQ-7 replace BZT52C6V8 in existing designs?
No. BZT52C6V8 uses SOD-123 packaging (2.7 mm × 1.6 mm), higher RθJA (~460 °C/W), ±5% tolerance, and lacks AEC-Q101 qualification. While both regulate near 6.8 V, the BZT585B6V8TQ-7's SOD523 footprint (0.85 mm × 1.25 mm), tighter tolerance, and automotive qualification require PCB redesign and qualification revalidation.
BZT585B6V8TQ-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):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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
BZT585B6V8TQ-7 FAQ
1.How can I place an order for BZT585B6V8TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B6V8TQ-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 BZT585B6V8TQ-7 reliable?
The price and inventory of BZT585B6V8TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B6V8TQ-7 is usually 5 days.
3.What payment methods are accepted for BZT585B6V8TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B6V8TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B6V8TQ-7?
BZT585B6V8TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B6V8TQ-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 BZT585B6V8TQ-7?
For technical support, including BZT585B6V8TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B6V8TQ-7 requirements.
6.How does Aetrix verify that BZT585B6V8TQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B6V8TQ-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 BZT585B6V8TQ-7 meets industry standards.
7.What is the process for return or replacement of BZT585B6V8TQ-7?
All BZT585B6V8TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B6V8TQ-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 BZT585B6V8TQ-7 part is unused and in its original packaging.
Return procedure for BZT585B6V8TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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