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Diodes Incorporated BZT585B11TQ-7
- Part No.:
- BZT585B11TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B11TQ-7.pdf
- Description:
- DIODE ZENER 11V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,784
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Product details
Overview
BZT585B11TQ from Diodes Incorporated is a precision Zener diode in SOD523 package, designed for voltage regulation and reference applications with ±2.0% breakdown voltage tolerance, 11 V nominal Zener voltage at 5 mA test current, 350 mW maximum power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZT585B11TQ datasheet, BZT585B11TQ pinout, BZT585B11TQ application, or BZT585B11TQ equivalent, this device serves as a low-profile, high-stability voltage reference in power supply feedback loops, sensor biasing circuits, and overvoltage protection stages where tight voltage tolerance and thermal stability are critical.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 8.2 mV/°C temperature coefficient ensures predictable drift behavior, while low dynamic impedance (10 Ω at 5 mA) supports accurate regulation in low-current reference paths.
The device uses an alloy-42 leadframe with matte tin annealed finish, enabling reliable solderability per MIL-STD-202, and features a cathode band marking for unambiguous polarity identification. Its SOD523 package delivers high power density (350 mW) in a 1.25 mm × 0.85 mm footprint with 0.17 mm profile height.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V (nominal), 10.78–11.22 V range at 5 mA - enables precise 11 V reference generation with minimal calibration overhead |
| Zener Impedance (ZZT) | 10 Ω at IZT = 5 mA - ensures low output impedance for stable regulation under small-signal load variations |
| Power Dissipation (PD) | 350 mW - supports operation in compact PCB layouts without forced cooling in ambient temperatures up to +125°C |
| Temperature Coefficient (TC) | +8.2 mV/°C - provides predictable positive drift for compensation design in temperature-critical references |
| Reverse Leakage (IR) | 0.1 µA at VR = 8 V - minimizes quiescent current draw in battery-powered voltage monitor circuits |
| Capacitance (CT) | 110 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in analog signal conditioning paths |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - allows use as low-drop rectifier or clamp in auxiliary signal paths |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), flat lead design optimized for low profile and thermal performance on FR-4 PCBs with minimum pad layout per Diodes' package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower potential node in Zener regulation | Enables standard cathode-grounded configuration for shunt regulation; requires external series resistor for current limiting |
| Cathode | Current exit terminal in forward bias; marked by band; connected to higher potential node in Zener mode | Provides defined polarity for mounting orientation; must be tied to regulated voltage rail in feedback or clamping circuits |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces need for post-production trimming in precision reference designs, lowering manufacturing cost and test time |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules operating across -40°C to +125°C ambient |
| SOD523 package with 357 °C/W RθJA | Enables thermal management in space-constrained modules without heatsinks or thermal vias in most 2-layer board applications |
| Halogen- and antimony-free "Green" compound | Meets automotive OEM environmental requirements (e.g., Ford WSS-M99P9999-A1, GM GP-12) without compromising moisture resistance (MSL Level 1) |
Applications
| Automotive Body Control Module (BCM) Voltage Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 11 V reference for microcontroller ADC input scaling and analog front-end biasing in BCM subassemblies. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining regulation accuracy despite battery voltage fluctuations (9–16 V) and engine cranking transients. Use Value: Enables consistent sensor measurement resolution across temperature (-40°C to +125°C) and lifetime without recalibration due to ±2.0% initial tolerance and +8.2 mV/°C TC predictability. |
Use Scenario: Biasing bridge sensors (e.g., pressure, load cell) in factory automation transmitters requiring low-drift excitation. IC Role / Device Role / Timing Role: Precision excitation source delivering stable 11 V to Wheatstone bridge arms with minimal thermal drift. Use Value: Limits bridge output error to <0.1% FS over 0–70°C ambient, directly enabled by 10 Ω Zener impedance and 0.1 µA leakage at 8 V reverse bias. |
| USB-C Power Delivery Clamp Protection | Medical Patient Monitor Reference Supply |
Use Scenario: Clamping transient overvoltage on 12 V auxiliary rails in USB-C PD sink controllers during hot-plug events. IC Role / Device Role / Timing Role: Fast-response overvoltage protector absorbing short-duration spikes above 11.5 V while preserving system integrity. Use Value: Withstands 350 mW peak pulse energy and responds within nanoseconds due to low junction capacitance (110 pF), preventing false shutdowns in PD negotiation logic. |
Use Scenario: Generating calibrated 11 V reference for ECG amplifier gain-setting resistors and DAC reference inputs in Class II medical devices. IC Role / Device Role / Timing Role: Primary voltage reference ensuring traceable accuracy and long-term stability in safety-critical analog signal chains. Use Value: Meets IEC 60601-1 leakage current limits (<10 µA) via 0.1 µA reverse leakage at 8 V, and supports 10-year calibration intervals due to AEC-Q101 stress validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F (Diodes Inc.) | 10 V nominal Zener, ±5% tolerance, SOD-323 package, 300 mW PD, 17 Ω ZZT | Lower voltage grade and wider tolerance; less suitable for 11 V precision feedback but acceptable for general-purpose clamping | Select when cost sensitivity outweighs voltage accuracy and thermal stability requirements |
| BZX84-C11 (Nexperia) | 11 V nominal, ±5% tolerance, SOT-23 package, 350 mW PD, 20 Ω ZZT, no AEC-Q101 qualification | Larger footprint (2.9 mm × 1.3 mm), higher thermal resistance (~400 °C/W), and non-automotive qualified | Choose only for non-automotive industrial applications where SOT-23 handling compatibility is prioritized over miniaturization |
Compared with MMBZ5240BS-7-F and BZX84-C11, the BZT585B11TQ delivers tighter voltage tolerance, lower dynamic impedance, and automotive-grade reliability in a smaller footprint-making it optimal for space-constrained, high-accuracy, and safety-compliant designs.
Availability
BZT585B11TQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, USB-C power delivery protection circuits, and medical patient monitor reference supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT585B11TQ 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 facilities.
The BZT585B series targets precision voltage reference and regulation in automotive electronics, combining AEC-Q101 qualification, green packaging, and tight Zener tolerances to meet stringent OEM requirements for functional safety and environmental compliance.
FAQ
What is the maximum continuous Zener current for BZT585B11TQ at 25°C ambient?
The device supports up to 31.8 mA continuous Zener current at 25°C ambient, calculated from PD = 350 mW and VZ = 11 V (IZ(max) = PD/VZ). Derating begins above 25°C per the power derating curve, reaching zero at 150°C ambient.
Is BZT585B11TQ suitable for use in a cathode-anode reversed configuration?
No - the device is a unidirectional Zener diode intended for reverse-bias operation only. Forward conduction is limited to 200 mA continuous current with 0.9 V drop at 10 mA; using it in forward-biased voltage reference roles violates its design intent and degrades regulation accuracy.
How does the +8.2 mV/°C temperature coefficient affect circuit design?
This positive coefficient means output voltage increases ~0.09 V over a 110°C range (−40°C to +70°C). Designers compensate by pairing with negative-TC components (e.g., silicon bandgap references) or selecting adjacent Zener voltages with opposing coefficients in multi-stage references.
Can BZT585B11TQ replace BZT585B10TQ in an existing design?
Only if the 1 V increase (10 V → 11 V) is acceptable in the target circuit's regulation window and feedback loop gain. Both share identical package, thermal specs, and AEC-Q101 qualification, but the 11 V version raises reference level - verify stability margins and output ripple before substitution.
BZT585B11TQ-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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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
BZT585B11TQ-7 FAQ
1.How can I place an order for BZT585B11TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B11TQ-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 BZT585B11TQ-7 reliable?
The price and inventory of BZT585B11TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B11TQ-7 is usually 5 days.
3.What payment methods are accepted for BZT585B11TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B11TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B11TQ-7?
BZT585B11TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B11TQ-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 BZT585B11TQ-7?
For technical support, including BZT585B11TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B11TQ-7 requirements.
6.How does Aetrix verify that BZT585B11TQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B11TQ-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 BZT585B11TQ-7 meets industry standards.
7.What is the process for return or replacement of BZT585B11TQ-7?
All BZT585B11TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B11TQ-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 BZT585B11TQ-7 part is unused and in its original packaging.
Return procedure for BZT585B11TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT585B11TQ-7 Tags
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