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Diodes Incorporated BZT585B13TQ-7
- Part No.:
- BZT585B13TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B13TQ-7.pdf
- Description:
- DIODE ZENER 13V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
BZT585B13TQ from Diodes Incorporated is a precision Zener diode with 13 V nominal breakdown voltage (±2.0% tolerance), 350 mW power dissipation, and SOD523 package. It operates across –65 °C to +150 °C, features 10.7 mV/°C temperature coefficient, and delivers stable voltage reference in low-power analog circuits and automotive sensor signal conditioning.
For engineers reviewing the BZT585B13TQ datasheet, BZT585B13TQ pinout, BZT585B13TQ application, or BZT585B13TQ equivalent, key selection criteria include Zener voltage accuracy, thermal stability at elevated ambient temperatures, low reverse leakage (<0.1 µA @ 8 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse-biased breakdown mode. Its ±2.0% VZ tolerance at IZT = 5 mA and 10.7 mV/°C temperature coefficient enable precise regulation in feedback networks and overvoltage protection clamps.
The SOD523 package supports high power density (350 mW) with low thermal resistance (357 °C/W) on FR-4 PCBs. Cathode band marking and matte tin–annealed terminals ensure reliable solderability and traceable polarity identification in automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.0 V (nominal), 12.74–13.26 V range at 5 mA - enables tight voltage reference in 12 V system rails |
| Power Dissipation (PD) | 350 mW - supports continuous operation without heatsinking in space-constrained PCB layouts |
| Zener Impedance (ZZT) | 10 Ω @ 5 mA - ensures minimal output voltage variation under load transients |
| Temperature Coefficient (TC) | +10.7 mV/°C - provides predictable, linear drift for compensated reference designs |
| Reverse Leakage (IR) | 0.1 µA @ 8 V - minimizes quiescent current in battery-powered monitoring circuits |
| Package | SOD523 - 1.2 mm × 0.8 mm footprint with 0.65 mm height, compatible with 0201 pick-and-place |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control modules and ADAS sensors |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case with cathode band marking; dimensions: 1.25 mm (E) × 0.85 mm (D) × 0.65 mm (He) max; weight ≈ 0.001 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common; forms reference return path in shunt regulator topologies |
| Cathode | Reverse breakdown terminal / Zener output node | Provides regulated voltage when reverse-biased; marked by visible band for polarity assurance |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces calibration overhead in factory-trimmed analog front-ends and sensor signal chains |
| AEC-Q101 qualification | Validates robustness for automotive under-hood environments including thermal cycling and vibration stress |
| Low-profile SOD523 package | Enables placement adjacent to ICs on dense PCBs without interfering with shield cans or connectors |
| Halogen- and antimony-free "Green" construction | Meets IEC 61249-2-21 and JEDEC J-STD-709B requirements for eco-compliant manufacturing |
| Matte tin–annealed terminals | Ensures consistent wetting and void-free reflow solder joints per MIL-STD-202 Method 208 |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 13 V reference for analog-to-digital converter biasing in engine knock sensor interfaces. IC Role / Device Role / Timing Role: Shunt voltage reference regulating ADC input range against supply rail fluctuations. Use Value: Maintains <±0.26 V error over temperature (–40 °C to +125 °C), preserving 12-bit measurement fidelity. | Use Scenario: Clamping transient overvoltage on 4–20 mA current loop transmitters during ESD events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting crowbar element before op-amp input stage. Use Value: Limits input to ≤13.3 V with <0.1 µA leakage at 8 V, preventing amplifier saturation and data corruption. |
| Portable Medical Pulse Oximeter Power Rail | Consumer IoT Battery Voltage Monitor |
Use Scenario: Stabilizing bias voltage for photodiode transimpedance amplifier in low-power wearable devices. IC Role / Device Role / Timing Role: Precision voltage reference setting amplifier gain and offset in analog front-end. Use Value: Delivers 13.0 V ±0.26 V over full industrial temperature range, enabling sub-1% SpO₂ measurement repeatability. | Use Scenario: Monitoring Li-ion cell voltage via resistive divider with microcontroller ADC input. IC Role / Device Role / Timing Role: Low-leakage Zener providing known reference point for ratiometric voltage scaling. Use Value: Draws only 0.1 µA reverse current at 8 V, extending battery life beyond 5 years in always-on BLE beacons. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5243B-7-F | 13 V nominal, ±5% tolerance, 350 mW, SOT-23 package (larger footprint) | Higher voltage drift (+11.5 mV/°C); not AEC-Q101 qualified | Select for cost-sensitive non-automotive designs where ±5% tolerance is acceptable |
| BZX84-C13-7-F | 13 V nominal, ±5% tolerance, 300 mW, SOT-23 package | Higher Zener impedance (30 Ω), higher leakage (0.5 µA @ 8 V) | Choose when legacy SOT-23 board space exists and AEC-Q101 compliance is not required |
Compared with MMBZ5243B-7-F and BZX84-C13-7-F, the BZT585B13TQ offers tighter voltage tolerance, lower temperature drift, and automotive qualification-making it optimal for safety-critical voltage references where long-term stability and regulatory compliance are mandatory.
Availability
BZT585B13TQ is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, portable medical devices, and consumer IoT battery monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT585B13TQ 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 and industrial applications demanding high accuracy, low leakage, and AEC-Q101 reliability in miniature packages.
FAQ
What is the maximum reverse current specification for BZT585B13TQ at 8 V?
The maximum reverse current (IR) is 0.1 µA at VR = 8 V, measured at TA = +25 °C. This ultra-low leakage supports energy-efficient operation in battery-powered systems and preserves accuracy in high-impedance reference divider networks.
Is BZT585B13TQ compatible with lead-free reflow soldering profiles?
Yes - its matte tin–annealed terminals meet IPC-J-STD-020 moisture sensitivity Level 1 and are qualified for standard lead-free reflow profiles (peak temperature up to 260 °C). The device is fully RoHS 3 compliant and halogen-free per IEC 61249-2-21.
How does the temperature coefficient affect voltage stability over automotive temperature ranges?
With a +10.7 mV/°C coefficient, BZT585B13TQ exhibits ~1.1 V total drift from –40 °C to +125 °C. In practice, this yields ±0.26 V deviation around 13.0 V, which remains within 2% tolerance band and supports stable operation in under-hood ECUs without external compensation.
Can BZT585B13TQ replace older Zener diodes like 1N4742A in existing designs?
No - while both regulate at ~13 V, BZT585B13TQ uses SOD523 (0201-size) packaging versus 1N4742A's DO-41 through-hole case. Direct replacement requires PCB redesign. Electrical differences include tighter tolerance (±2.0% vs ±5%), lower ZZT (10 Ω vs 16 Ω), and AEC-Q101 qualification absent in the legacy part.
BZT585B13TQ-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):
- 13 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
BZT585B13TQ-7 FAQ
1.How can I place an order for BZT585B13TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B13TQ-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 BZT585B13TQ-7 reliable?
The price and inventory of BZT585B13TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B13TQ-7 is usually 5 days.
3.What payment methods are accepted for BZT585B13TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B13TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B13TQ-7?
BZT585B13TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B13TQ-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 BZT585B13TQ-7?
For technical support, including BZT585B13TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B13TQ-7 requirements.
6.How does Aetrix verify that BZT585B13TQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B13TQ-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 BZT585B13TQ-7 meets industry standards.
7.What is the process for return or replacement of BZT585B13TQ-7?
All BZT585B13TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B13TQ-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 BZT585B13TQ-7 part is unused and in its original packaging.
Return procedure for BZT585B13TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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