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Diodes Incorporated BZT585B30T-7
- Part No.:
- BZT585B30T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B30T-7.pdf
- Description:
- DIODE ZENER 30V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,386
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Product details
Overview
BZT585B30T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 30 V breakdown voltage (29.4–30.6 V at 2 mA), ±2.0% tolerance, 350 mW power dissipation, and SOD523 package. It provides stable voltage reference and overvoltage protection in low-power analog circuits, power supply feedback loops, and sensor biasing networks.
For engineers reviewing the BZT585B30T-7 datasheet, BZT585B30T-7 pinout, BZT585B30T-7 application, or BZT585B30T-7 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance (80 Ω at 2 mA), temperature coefficient (+31.1 mV/°C), reverse leakage (<0.05 µA at 21 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage under varying current conditions. Its 80 Ω dynamic impedance at 2 mA and +31.1 mV/°C temperature coefficient enable predictable regulation across industrial temperature ranges (−65 °C to +150 °C).
The device uses a planar-diffused silicon junction in a molded plastic SOD523 case with matte tin-plated Alloy 42 leads. Its flat-lead design supports high power density on FR-4 PCBs while meeting AEC-Q101 stress testing requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, 29.4–30.6 V range at 2 mA - ensures tight regulation in voltage reference designs |
| Power Dissipation (PD) | 350 mW - supports operation up to 2 mA at 30 V without thermal derating on standard FR-4 layout |
| Zener Impedance (ZZT) | 80 Ω at 2 mA - limits output voltage variation under load current changes |
| Temperature Coefficient (TC) | +31.1 mV/°C - quantifies positive drift per degree, critical for temperature-compensated references |
| Reverse Leakage (IR) | <0.05 µA at 21 V - enables ultra-low standby current in battery-powered sensing nodes |
| Package | SOD523 - 1.6 × 0.8 mm footprint with 0.3 mm height, compatible with high-density automated assembly |
| AEC-Q101 Qualified | Yes - validated for automotive applications including body control modules and infotainment power rails |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case with cathode band marking; dimensions: 1.6 mm length × 0.8 mm width × 0.3 mm height; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Reverse breakdown terminal / Zener voltage output | Connected to input rail or regulated node; marked by visible band on package top |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Reduces need for post-production trimming in precision reference circuits |
| AEC-Q101 qualification | Validates reliability for automotive under-hood and dashboard electronics |
| Lead-free and halogen-free "Green" construction | Meets RoHS 2 and JEDEC J-STD-020 MSL Level 1 for zero bake requirement |
| Low-profile SOD523 package | Enables placement beneath connectors or in space-constrained IoT sensor modules |
| Thermal resistance (RθJA) | 357 °C/W - allows full 350 mW dissipation with ≤125 °C junction rise on minimal copper pad |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 5 V microcontroller supply rail in door module with wide ambient temperature swings. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable feedback to LDO error amplifier. Use Value: Maintains ±1.5% output accuracy over −40 °C to +125 °C due to AEC-Q101 validation and known TC. | Use Scenario: Biasing bridge-based pressure transducer in factory automation PLC input stage. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric ADC excitation. Use Value: Enables 12-bit measurement linearity by holding reference within 0.02% drift over 10-year field life. |
| USB-C Power Delivery Monitor | Medical Wearable Battery Protection |
Use Scenario: Overvoltage clamp on CC line during USB PD negotiation to protect controller GPIO. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting CC line to 30 V during fault events. Use Value: Prevents latch-up in USB PD PHY ICs with <0.05 µA leakage preserving bus enumeration timing. | Use Scenario: Cell voltage monitor in rechargeable Li-ion pack for ECG patch with 10-year shelf life. IC Role / Device Role / Timing Role: Low-leakage Zener reference for coulomb counter analog front-end. Use Value: Contributes <1 nA total system leakage, extending shelf-life beyond 3 years without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5261ET1G | 30 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Larger footprint (3.5 × 1.6 mm) and looser tolerance reduce suitability for space-constrained automotive modules | Select when higher power margin is required and board area permits larger package |
| BZX84-C30 | 30 V nominal, ±5% tolerance, 300 mW rating, SOT-23 package | SOT-23 requires more PCB area and lacks AEC-Q101 qualification for automotive use | Prefer for cost-sensitive consumer applications where qualification is not mandated |
Compared with MMSZ5261ET1G and BZX84-C30, BZT585B30T-7 delivers tighter voltage tolerance, smaller footprint, and automotive qualification-making it optimal for next-generation ADAS sensors and compact medical monitors where size, stability, and reliability are co-constrained.
Availability
BZT585B30T-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and USB-C power delivery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT585B30T-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 and manufacturing operations across Asia and the Americas.
The BZT585 series belongs to Diodes' precision Zener portfolio designed specifically for high-reliability voltage reference and protection in automotive, industrial, and medical applications where tight tolerance and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT585B30T-7?
The BZT585B30T-7 has a nominal Zener voltage of 30 V with a guaranteed range of 29.4 V to 30.6 V at test current IZT = 2 mA. Breakdown occurs sharply within this range; operation above 30.6 V risks exceeding power limits unless current is strictly limited to avoid thermal runaway.
Does BZT585B30T-7 require a heatsink in standard PCB layouts?
No heatsink is required. With RθJA = 357 °C/W and PD = 350 mW, junction-to-ambient rise is ~124 °C at full power on minimum recommended FR-4 pad layout. At typical operating currents (<1 mA), temperature rise remains below 30 °C, well within safe limits for SOD523.
How does the +31.1 mV/°C temperature coefficient affect circuit performance?
This positive coefficient means output voltage increases by 31.1 mV per °C rise in junction temperature. In a 30 V reference, that's +0.104%/°C drift. For applications needing <0.5% total drift over −40 °C to +125 °C, compensation or calibration is advised-especially in unventilated enclosures.
Can BZT585B30T-7 be used in place of older BZX55C30 Zeners?
Yes, but with caveats: BZT585B30T-7 offers tighter tolerance (±2% vs ±5%), smaller SOD523 vs DO-35, and AEC-Q101 qualification. However, its lower test current (2 mA vs 5 mA) and higher ZZT (80 Ω vs ~35 Ω) may alter regulation behavior in legacy designs-verify loop stability and voltage drop under actual load.
BZT585B30T-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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT585B30T-7 FAQ
1.How can I place an order for BZT585B30T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B30T-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 BZT585B30T-7 reliable?
The price and inventory of BZT585B30T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B30T-7 is usually 5 days.
3.What payment methods are accepted for BZT585B30T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B30T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B30T-7?
BZT585B30T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B30T-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 BZT585B30T-7?
For technical support, including BZT585B30T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B30T-7 requirements.
6.How does Aetrix verify that BZT585B30T-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B30T-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 BZT585B30T-7 meets industry standards.
7.What is the process for return or replacement of BZT585B30T-7?
All BZT585B30T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B30T-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 BZT585B30T-7 part is unused and in its original packaging.
Return procedure for BZT585B30T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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