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Diodes Incorporated BZT585B36T-7
- Part No.:
- BZT585B36T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT585B36T-7.pdf
- Description:
- DIODE ZENER 36V 350MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,655
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Product details
Overview
BZT585B36T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 36 V breakdown voltage (35.28–36.72 V at 2 mA), ±2.0% tolerance, 90 Ω dynamic impedance at 1 kHz, and 42.4 mV/°C temperature coefficient. It operates from −65 °C to +150 °C, dissipates up to 350 mW on FR-4 PCB, and serves as a stable voltage reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZT585B36T-7 datasheet, BZT585B36T-7 pinout, BZT585B36T-7 application, or BZT585B36T-7 equivalent, key selection criteria include Zener voltage accuracy, low thermal drift, SOD523 package compatibility with high-density layouts, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device functions as a two-terminal voltage reference where reverse-biased operation establishes a stable Zener voltage across its terminals. Its 36 V nominal rating targets mid-range regulation needs-higher than standard logic-supply references but lower than industrial bus protection thresholds.
The SOD523 package enables compact placement while maintaining 357 °C/W junction-to-ambient thermal resistance. With 0.05 µA maximum reverse leakage at 25.2 V and 45 pF capacitance at 0 V, it supports stable DC referencing without significant AC loading in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, 35.28–36.72 V range at 2 mA - ensures tight regulation in 3.3 V or 5 V supply-derived bias rails |
| Zener Impedance (ZZT) | 90 Ω at 1 kHz - minimizes output voltage variation under load transients in closed-loop regulators |
| Temperature Coefficient (TC) | +42.4 mV/°C - predictable positive drift allows compensation in temperature-sensitive references |
| Power Dissipation (PD) | 350 mW - supports continuous operation in space-constrained PCBs with minimal heatsinking |
| Reverse Leakage (IR) | 0.05 µA max at 25.2 V - prevents parasitic current draw in battery-backed or ultra-low-power monitoring circuits |
| Capacitance (CT) | 45 pF at 1 MHz, 0 V - avoids signal coupling or phase shift in high-frequency feedback paths |
| Package | SOD523 - 1.6 × 0.8 mm footprint ideal for portable electronics and automotive control modules |
Pinout & Package
Two-terminal device in SOD523 package: cathode marked by band; anode unmarked. Terminals are matte tin-plated Alloy 42 leads, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-bias voltage reference node | Connected to regulated output or error amplifier inverter input for feedback stability |
| Anode | Reference ground return path | Provides low-impedance return to system ground or bias rail, critical for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% Zener voltage tolerance | Enables single-part binning without post-assembly calibration in cost-sensitive consumer power supplies |
| AEC-Q101 qualified | Validated for automotive engine control units and body electronics requiring extended temperature cycling and humidity resistance |
| Green molding compound (UL 94V-0) | Meets flammability and halogen-free requirements for enclosed industrial enclosures and medical devices |
| Moisture Sensitivity Level 1 | Eliminates bake-out prior to reflow, reducing manufacturing cycle time and PCB warpage risk |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage for 5 V LDO regulator supplying microcontroller core logic in engine management systems. IC Role / Device Role / Timing Role: Precision Zener reference providing stable 36 V reference point for error amplifier biasing. Use Value: Maintains ±0.72 V regulation window over temperature, ensuring consistent ADC reference scaling despite under-hood thermal swings. | Use Scenario: Clamping transient overvoltage on 24 V analog input channel before op-amp front-end in programmable logic controller. IC Role / Device Role / Timing Role: Reverse-biased voltage clamp limiting input excursions to safe levels during ESD events. Use Value: 45 pF capacitance and 0.05 µA leakage preserve signal integrity and minimize offset drift in 16-bit measurement circuits. |
| USB-C Power Delivery Monitor Reference | Medical Infusion Pump Battery Monitoring |
Use Scenario: Providing accurate voltage threshold for PD communication IC detecting 20 V USB-C source negotiation. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling precise detection of negotiated voltage levels. Use Value: ±2.0% tolerance ensures reliable 20 V detection across production lots without trimming resistors. | Use Scenario: Monitoring lithium-ion battery pack voltage in safety-critical infusion pump battery management circuitry. IC Role / Device Role / Timing Role: Stable 36 V reference for analog-to-digital conversion of 3S/4S battery stack voltage. Use Value: AEC-Q101 qualification and −65 °C to +150 °C operating range support sterilization cycles and long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247BT1G | 36 V nominal, ±5% tolerance, 100 Ω ZZT, SOD-123 package (2.7 × 1.4 mm) | Larger footprint; higher impedance reduces regulation accuracy under load variation | Select when board space permits larger package and tighter voltage tolerance is not required |
| BZX84-C36 | 36 V nominal, ±5% tolerance, 90 Ω ZZT, SOT-23 package (3.0 × 1.4 mm) | Higher thermal resistance (450 °C/W); requires larger copper area for same power dissipation | Choose for legacy designs using SOT-23 footprints where AEC-Q101 is not mandated |
Compared with MMSZ5247BT1G and BZX84-C36, BZT585B36T-7 delivers superior voltage accuracy and smaller footprint, making it optimal for next-generation automotive and portable medical devices where space and precision are constrained.
Availability
BZT585B36T-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog inputs, and USB-C power delivery monitors requiring stable component supply with AEC-Q101 compliance and tight Zener voltage tolerance.
Supply support for BZT585B36T-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT585 series belongs to Diodes' precision Zener diode product line, engineered for voltage reference and overvoltage protection in space-constrained, thermally demanding applications where ±2.0% tolerance and AEC-Q101 qualification are mandatory.
FAQ
What is the maximum reverse voltage that can be continuously applied to BZT585B36T-7 without exceeding its power rating?
At 25 °C ambient, the device may sustain up to 36 V reverse bias at 9.7 mA (350 mW ÷ 36 V) before exceeding its 350 mW power dissipation limit. Derating applies above 25 °C per the 357 °C/W thermal resistance curve; at 85 °C ambient, maximum continuous current drops to approximately 6.2 mA.
Does BZT585B36T-7 require external series resistance in typical Zener regulator configurations?
Yes-external current-limiting resistance is mandatory to set the Zener test current (2 mA specified) and prevent thermal runaway. For a 48 V input regulating to 36 V, a 6.2 kΩ resistor delivers ~2 mA, aligning with the device's specified ZZT and TC parameters.
How does the +42.4 mV/°C temperature coefficient affect long-term voltage reference stability?
The positive TC causes the Zener voltage to rise ~0.85 V over a 20 °C temperature span (e.g., 25 °C to 45 °C). In precision applications, this drift must be compensated via circuit design (e.g., combining with negative-TC components) or calibrated out in firmware.
Can BZT585B36T-7 be used in bidirectional ESD protection configurations?
No-it is a unidirectional Zener diode optimized for reverse-bias voltage regulation. For bidirectional ESD clamping, purpose-built TVS diodes such as D3V3M1U2SOT-7A (3.3 V, ±15 kV contact) are required; BZT585B36T-7 lacks symmetric breakdown characteristics and specified ESD ratings.
BZT585B36T-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):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT585B36T-7 FAQ
1.How can I place an order for BZT585B36T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT585B36T-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 BZT585B36T-7 reliable?
The price and inventory of BZT585B36T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B36T-7 is usually 5 days.
3.What payment methods are accepted for BZT585B36T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B36T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT585B36T-7?
BZT585B36T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT585B36T-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 BZT585B36T-7?
For technical support, including BZT585B36T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B36T-7 requirements.
6.How does Aetrix verify that BZT585B36T-7 is sourced from the original manufacturer or authorized distributors?
All BZT585B36T-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 BZT585B36T-7 meets industry standards.
7.What is the process for return or replacement of BZT585B36T-7?
All BZT585B36T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B36T-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 BZT585B36T-7 part is unused and in its original packaging.
Return procedure for BZT585B36T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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