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Diodes Incorporated BZT585B9V1TQ-7
- Part No.:
- BZT585B9V1TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B9V1TQ-7.pdf
- Description:
- DIODE ZENER 9.1V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
BZT585B9V1TQ from Diodes Incorporated is a precision Zener diode with nominal 9.1 V breakdown voltage (±2.0% tolerance), 10 Ω dynamic impedance at 5 mA test current, and 350 mW power dissipation in SOD523 package-used for voltage regulation and reference in automotive power supply monitoring circuits.
For engineers reviewing the BZT585B9V1TQ datasheet, BZT585B9V1TQ pinout, BZT585B9V1TQ application, or BZT585B9V1TQ equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, and direct replacement guidance for automotive-grade voltage reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a temperature coefficient of +5.8 mV/°C, enabling stable voltage reference over -65°C to +150°C ambient range. Its low 120 pF capacitance at 0 V bias supports high-frequency noise suppression in feedback paths.
The device delivers 0.9 V forward voltage at 10 mA and sustains 200 mA continuous forward current, while its 357 °C/W junction-to-ambient thermal resistance requires minimal PCB copper area for thermal management under 350 mW load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.92–9.28 V range at 5 mA - ensures tight regulation for 9 V rail supervision |
| Zener Impedance (ZZT) | 10 Ω at 5 mA - minimizes output voltage variation under load transients |
| Power Dissipation (PD) | 350 mW - supports operation up to +125°C ambient with standard FR-4 pad layout |
| Temperature Coefficient | +5.8 mV/°C - enables predictable drift compensation in temperature-critical references |
| Reverse Leakage (IR) | 0.5 µA max at 6 V - ensures negligible current draw in standby voltage monitor circuits |
| Capacitance (CT) | 120 pF at 1 MHz, 0 V - suitable for filtering without degrading loop stability in feedback networks |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case (1.25 mm × 0.85 mm × 0.65 mm), flat lead design optimized for low profile and thermal performance on FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias cathode reference | Connected to lower-potential node in shunt regulator configuration |
| Cathode | Reverse breakdown terminal / Zener voltage reference point | Marked with band; tied to regulated output node in voltage clamp applications |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces calibration overhead in automotive sensor supply rails |
| AEC-Q101 qualified | Validated for use in engine control units and ADAS power domains |
| SOD523 package with matte tin finish | Enables automated optical inspection and reliable reflow soldering |
| Halogen- and antimony-free "Green" compound | Meets IATF16949-compliant manufacturing and RoHS 3 (2015/863/EU) |
Applications
| Automotive Power Rail Monitor | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring 9 V battery-derived supply in body control modules during cold cranking. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable threshold for supervisor IC input. Use Value: Tight 9.1 V tolerance and +5.8 mV/°C TC enable accurate undervoltage detection across -40°C to +125°C. |
Use Scenario: Providing reference voltage for 12-bit ADC in factory automation pressure transmitters. IC Role / Device Role / Timing Role: Precision DC reference source for analog front-end signal conditioning. Use Value: 10 Ω ZZT and 0.5 µA leakage ensure <0.1% reference error contribution at 100 µA load. |
| USB-C PD Feedback Clamp | Low-Power IoT Voltage Supervisor |
Use Scenario: Clamping feedback voltage in secondary-side regulation of USB-C power delivery adapters. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting optocoupler input voltage swing. Use Value: 120 pF capacitance avoids phase shift in 100 kHz–1 MHz feedback loops while maintaining 350 mW surge capability. |
Use Scenario: Enabling wake-up from deep sleep when main supply drops below 9 V in battery-powered asset trackers. IC Role / Device Role / Timing Role: Low-quiescent-current voltage detector element in discrete supervisor circuit. Use Value: 0.5 µA max reverse leakage preserves battery life over multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5240B-TP (Micro Commercial) | 9.1 V ±5%, 15 Ω ZZT, SOD-123 package (larger footprint, higher RθJA) | Non-AEC-Q101; not qualified for automotive underhood use | Select only for cost-sensitive industrial consumer designs where qualification is not required |
| BZX84-C9V1 (Nexperia) | 9.1 V ±5%, 15 Ω ZZT, SOT-23 package (3-pin, anode/cathode/common pinout) | Requires PCB redesign due to different footprint and pin assignment | Choose when existing SOT-23 layout exists and AEC-Q101 is not mandatory |
Compared with MMSZ5240B-TP and BZX84-C9V1, BZT585B9V1TQ offers tighter voltage tolerance, lower dynamic impedance, AEC-Q101 qualification, and SOD523 space savings-making it optimal for next-generation automotive and high-density industrial references.
Availability
BZT585B9V1TQ is available at Aetrix Electronics and suitable for automotive power monitoring, industrial sensor reference, USB-C PD feedback clamping, and low-power IoT voltage supervision requiring stable component supply across extended temperature ranges.
Supply support for BZT585B9V1TQ 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.
This device belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial applications demanding high reliability, tight voltage tolerance, and robust thermal performance in miniature packages.
FAQ
What is the maximum reverse voltage before breakdown for BZT585B9V1TQ?
The nominal Zener voltage is 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 conditions; operation above 9.28 V risks exceeding power limits unless current is strictly limited by external series resistance.
Is BZT585B9V1TQ suitable for use in automotive under-hood environments?
Yes-it is AEC-Q101 qualified, manufactured in IATF16949-certified facilities, and rated for -65°C to +150°C operating temperature. Its SOD523 package and green molding compound meet automotive thermal cycling and chemical resistance requirements.
How does the +5.8 mV/°C temperature coefficient affect long-term reference stability?
This positive TC means output voltage increases linearly with temperature. In systems requiring zero-drift references, it must be compensated-e.g., by pairing with a negative-TC component or using digital calibration. Uncompensated, it contributes ~0.065% per °C change from 25°C baseline.
Can BZT585B9V1TQ replace BZT52C9V1 in an existing design?
No-BZT52C9V1 uses DO-35 package (through-hole) and has ±5% tolerance, 20 Ω ZZT, and 500 mW rating. BZT585B9V1TQ is SOD523 surface-mount, ±2% tolerant, 10 Ω ZZT, and 350 mW rated. Direct substitution requires PCB and thermal redesign.
BZT585B9V1TQ-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:
- 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
BZT585B9V1TQ-7 FAQ
1.How can I place an order for BZT585B9V1TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B9V1TQ-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 BZT585B9V1TQ-7 reliable?
The price and inventory of BZT585B9V1TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B9V1TQ-7 is usually 5 days.
3.What payment methods are accepted for BZT585B9V1TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B9V1TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B9V1TQ-7?
BZT585B9V1TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B9V1TQ-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 BZT585B9V1TQ-7?
For technical support, including BZT585B9V1TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B9V1TQ-7 requirements.
6.How does Aetrix verify that BZT585B9V1TQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B9V1TQ-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 BZT585B9V1TQ-7 meets industry standards.
7.What is the process for return or replacement of BZT585B9V1TQ-7?
All BZT585B9V1TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B9V1TQ-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 BZT585B9V1TQ-7 part is unused and in its original packaging.
Return procedure for BZT585B9V1TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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