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Diodes Incorporated BZX84B36Q-7-F
- Part No.:
- BZX84B36Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B36Q-7-F.pdf
- Description:
- DIODE ZENER 36V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,440
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Product details
Overview
BZX84B36Q-7-F from Diodes Incorporated is an AEC-Q101-qualified surface-mount precision Zener diode with nominal 36 V zener voltage (±2% tolerance), 350 mW power dissipation, and SOT23 package. It regulates voltage in automotive power supply rails, ECU reference circuits, and sensor biasing networks where stable reverse breakdown under low-current conditions is required.
For engineers reviewing the BZX84B36Q-7-F datasheet, BZX84B36Q-7-F pinout, BZX84B36Q-7-F application, or BZX84B36Q-7-F equivalent, key selection criteria include its ±2% VZ tolerance at 2 mA test current, 90 Ω dynamic impedance at 2 mA, 0.1 µA maximum reverse leakage at 25.2 V, and automotive-grade qualification per AEC-Q101.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals. Its 36 V nominal zener voltage is specified at IZT = 2 mA with ±2% tolerance, and it exhibits a positive temperature coefficient of +30.4 mV/°C above 6 V, enabling predictable thermal drift compensation in voltage references.
The device delivers 350 mW power dissipation under ambient-temperature terminal conditions and derates linearly above +25°C, reaching zero dissipation at +150°C. Its 90 Ω zener impedance at 2 mA and 350 Ω at 0.5 mA ensures low AC noise coupling and stable regulation under varying load currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, 35.3–36.7 V range at 2 mA - enables precise 36 V rail clamping or reference generation |
| Power Dissipation (PD) | 350 mW at TA = 25°C - supports continuous operation in compact automotive PCB layouts |
| Zener Impedance (ZZT) | 90 Ω at IZT = 2 mA - ensures minimal output voltage variation under small-signal AC load changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 25.2 V - guarantees negligible quiescent current draw in battery-sensitive systems |
| Temperature Coefficient | +30.4 mV/°C - provides known, linear VZ drift for thermal compensation design |
| Package | SOT23 - compatible with high-speed pick-and-place assembly and meets IPC-7351B footprint standards |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control, body electronics, and ADAS subsystems |
Pinout & Package
Package: SOT23 - three-terminal plastic surface-mount package with lead-free matte tin plating, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction path / cathode reference ground | Connected to system ground or lower-potential node during reverse-bias regulation |
| Cathode (Pin 2) | Zener breakdown terminal / voltage reference output | Provides stable 36 V reference when reverse-biased; connects to regulated node or feedback path |
| No-Connect (Pin 3) | Internal die attach pad / mechanical support | Not electrically connected; serves thermal and mechanical anchoring function in SOT23 mold |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Reduces need for post-production trimming in voltage reference designs |
| AEC-Q101 qualification | Validated reliability for automotive under-hood and chassis-mounted electronics |
| 350 mW power rating at ambient | Enables use in space-constrained modules without forced cooling |
| Lead-free, halogen-free, antimony-free | Complies with RoHS 3 (2015/863/EU) and automotive ELV directive requirements |
| SOT23 footprint compatibility | Supports automated reflow soldering and IPC-7351B-compliant PCB layout |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 36 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor front-end circuits. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling and offset calibration. Use Value: ±2% VZ tolerance and +30.4 mV/°C TC enable accurate temperature-compensated sensor readings across -40°C to +125°C. |
Use Scenario: Regulating excitation voltage for 4–20 mA loop-powered pressure transmitters in factory automation. IC Role / Device Role / Timing Role: Zener shunt regulator maintaining constant 36 V supply to transmitter ICs despite line-voltage fluctuations. Use Value: 0.1 µA reverse leakage at 25.2 V minimizes standby current draw, extending loop lifetime in energy-constrained installations. |
| Telecom Power Supply Overvoltage Clamp | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Clamping transient overvoltages on 48 V telecom DC distribution rails to protect downstream DC-DC converters. IC Role / Device Role / Timing Role: Fast-acting shunt protection element absorbing surge energy during lightning-induced spikes. Use Value: 350 mW rating and 90 Ω ZZT allow controlled clamping without thermal runaway during repetitive 10/1000 µs surges. |
Use Scenario: Generating isolated 36 V bias for photodiode amplifier stages in portable ultrasound imaging front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference stabilizing op-amp common-mode input range. Use Value: 350 Ω ZZK at 0.5 mA ensures minimal signal distortion in high-gain, low-frequency amplification paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5245B-TP | 36 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Higher power but looser tolerance; lacks AEC-Q101 qualification | Select for cost-sensitive industrial power rails where ±5% VZ is acceptable and automotive qualification is unnecessary |
| BZX84-C36 | 36 V nominal, ±5% tolerance, 300 mW PD, SOT23, non-automotive grade | Same package but wider tolerance and no AEC-Q101 validation | Choose for consumer or commercial applications requiring SOT23 footprint without automotive reliability requirements |
Compared with MMSZ5245B-TP and BZX84-C36, BZX84B36Q-7-F uniquely combines ±2% tolerance, AEC-Q101 qualification, and 350 mW dissipation in SOT23-making it the only option for automotive-grade 36 V reference designs demanding tight regulation and long-term reliability.
Availability
BZX84B36Q-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, telecom power clamping circuits, and medical diagnostic equipment requiring stable component supply and full AEC-Q101 compliance.
Supply support for BZX84B36Q-7-F 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 BZX84B series belongs to Diodes' precision Zener diode product line, engineered specifically for automotive-grade voltage reference and overvoltage protection applications requiring tight tolerance, low leakage, and AEC-Q101 validation.
FAQ
What is the maximum reverse voltage before breakdown for BZX84B36Q-7-F?
The BZX84B36Q-7-F exhibits sharp reverse breakdown at 35.3 V minimum and 36.7 V maximum, specified at 2 mA test current (IZT). Below 35.3 V, reverse leakage remains ≤0.1 µA at 25.2 V, confirming stable non-conducting behavior until reaching the guaranteed zener knee.
Can BZX84B36Q-7-F be used in parallel for higher power handling?
No-parallel connection is not recommended due to mismatched zener voltages (±2% tolerance) causing current hogging in one device. For higher power, use a single higher-rated Zener like the 1N5365B (36 V, 5 W) or implement active regulation with a pass transistor.
Does the "Q" in BZX84B36Q-7-F indicate AEC-Q101 qualification?
Yes-the "Q" suffix explicitly denotes AEC-Q101 qualification per Diodes Incorporated's ordering nomenclature. This distinguishes it from standard-grade BZX84B36-7-F and confirms validation for automotive temperature, humidity, and lifetime stress testing.
What is the thermal resistance junction-to-ambient for this device?
When mounted on FR-4 PCB with recommended pad layout, RθJA is 417 °C/W (Note 5). With terminals held at ambient temperature, it improves to 357 °C/W (Note 6)-a value used for derating calculations in thermally constrained automotive modules.
BZX84B36Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84B36Q-7-F FAQ
1.How can I place an order for BZX84B36Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B36Q-7-F 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 BZX84B36Q-7-F reliable?
The price and inventory of BZX84B36Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B36Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B36Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B36Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B36Q-7-F?
BZX84B36Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B36Q-7-F 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 BZX84B36Q-7-F?
For technical support, including BZX84B36Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B36Q-7-F requirements.
6.How does Aetrix verify that BZX84B36Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B36Q-7-F 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 BZX84B36Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B36Q-7-F?
All BZX84B36Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B36Q-7-F, 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 BZX84B36Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B36Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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