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Nexperia USA Inc. BZX84W-B36-QX
- Part No.:
- BZX84W-B36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B36-QX.pdf
- Description:
- DIODE ZENER 36V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,656
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Product details
Overview
BZX84W-B36-QX from Nexperia is a ±2% tolerance Zener diode in SOT323 (SC-70) package, rated for 36 V nominal Zener voltage at 5 mA, with 350 Ω typical differential resistance and 33.0 mV/K temperature coefficient. It delivers 275 mW total power dissipation on FR4 PCB and supports automotive-grade regulation in compact space-constrained power rails.
For engineers reviewing the BZX84W-B36-QX datasheet, BZX84W-B36-QX pinout, BZX84W-B36-QX application, or BZX84W-B36-QX equivalent, this page provides verified Zener voltage, thermal resistance, reverse leakage, forward voltage, and AEC-Q101 qualification status - all critical for precision voltage reference and overvoltage protection design in automotive ECUs and industrial sensors.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 36 V regulation across load and line variations, with low 350 Ω dynamic impedance ensuring minimal output deviation under current shifts. Its ±2% tolerance and 33.0 mV/K temperature coefficient enable predictable drift compensation in feedback networks.
Designed for surface-mount reflow assembly, it features a three-terminal SOT323 package with Pin 1 = anode, Pin 2 = not connected, Pin 3 = cathode - supporting unidirectional clamping and shunt regulation without parasitic conduction paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.3 V to 36.7 V at IZ = 5 mA - defines precise regulation threshold for 36 V rail stabilization |
| Differential Resistance (rdif) | 350 Ω max at IZ = 5 mA - determines output voltage change per mA of current variation |
| Temperature Coefficient (SZ) | 33.0 mV/K - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Reverse Leakage (IR) | 1 µA max at VR = 2 V - ensures minimal standby current in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling capability |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W - defines temperature rise per watt dissipated in standard mounting condition |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - establishes forward conduction threshold for polarity-sensitive protection |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, and 0.25 mm maximum thickness - optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential side of Zener circuit; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | Internally isolated terminal; must remain unconnected to avoid parasitic coupling |
| 3 | Cathode (K) | Connects to higher-potential side; carries regulated current during breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules |
| ±2% Zener voltage tolerance | Enables tighter regulation margins than ±5% variants, reducing need for post-production trimming |
| Low 350 Ω differential resistance | Maintains <±0.5 V output deviation across 1–10 mA load current range in shunt regulator designs |
| 33.0 mV/K temperature coefficient | Supports predictable thermal drift modeling for compensation in wide-temperature-range systems |
| 275 mW power rating on FR4 | Allows direct integration into 3.3 V/5 V/12 V auxiliary rails without external heat sinking |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 36 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor interface circuits. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing fixed reference voltage for precision ADC input scaling. Use Value: ±2% tolerance and 33.0 mV/K coefficient allow calibrated offset correction across −40 °C to +125 °C ambient range. |
Use Scenario: Clamps transient overvoltage on 24 V industrial current-loop transmitters during ESD events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting voltage clamp protecting downstream op-amp inputs. Use Value: 275 mW power rating and 455 K/W thermal resistance sustain 1 kV HBM ESD pulses without degradation. |
| Telecom Power Supply Monitoring | Medical Diagnostic Equipment Biasing |
Use Scenario: Monitors 36 V intermediate bus voltage in PoE-powered network switches via resistive divider feedback. IC Role / Device Role / Timing Role: Precision Zener element in voltage divider network feeding supervisor IC threshold input. Use Value: 350 Ω differential resistance minimizes divider ratio error caused by load current variation. |
Use Scenario: Sets bias point for photodiode amplifier in portable ultrasound probe front-end. IC Role / Device Role / Timing Role: Low-noise shunt regulator supplying clean 36 V reference to transimpedance amplifier stage. Use Value: 1 µA reverse leakage at 2 V ensures negligible current injection into high-impedance sensor node. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C36-Q | ±5% tolerance (34.0–38.0 V), higher 45 pF capacitance, identical SOT323 package and power rating | Acceptable where ±5% regulation margin suffices and cost sensitivity outweighs precision needs | Select for non-critical biasing or cost-driven consumer designs where 36 V nominal is sufficient |
| MMSZ5245B-TP | ±5% tolerance (34.2–37.8 V), 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Lacks automotive qualification; higher power enables larger surge handling but requires larger board area | Choose only for industrial or commercial applications requiring higher power, not automotive use |
Compared with BZX84W-C36-Q, the BZX84W-B36-QX offers tighter voltage control and lower temperature drift; versus MMSZ5245B-TP, it trades higher power for AEC-Q101 compliance and smaller footprint - making it optimal for space- and reliability-critical automotive modules.
Availability
BZX84W-B36-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, industrial sensor signal conditioning, and telecom power monitoring requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-B36-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX84W-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse current at 2 V for BZX84W-B36-QX?
The maximum reverse current (IR) is 1 µA when reverse voltage (VR) is applied at 2 V, measured at Tj = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance reference nodes and preserves accuracy in precision analog circuits.
Is Pin 2 electrically connected internally?
No - Pin 2 is explicitly designated "not connected" (n.c.) in the official Nexperia pinning diagram and must remain unconnected on the PCB. Internal isolation prevents unintended coupling or parasitic conduction paths that could compromise regulation stability.
How does the 33.0 mV/K temperature coefficient affect regulation at 125 °C ambient?
At 125 °C ambient, assuming 25 °C rise due to self-heating, junction temperature reaches ~150 °C - resulting in ~4.1 V total drift (33.0 mV/K × 125 K). This is factored into automotive design margins and compensated via system-level calibration or complementary NTC networks.
Can BZX84W-B36-QX be used in place of BZX84W-B33-Q in a 33 V circuit?
No - BZX84W-B36-QX has a nominal Zener voltage of 36 V (35.3–36.7 V), exceeding the 33 V (32.3–33.7 V) range of BZX84W-B33-Q by ~3 V. Substitution would cause incorrect regulation, potential overvoltage stress on downstream components, and failure to meet functional safety thresholds.
BZX84W-B36-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±1.94%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B36-QX FAQ
1.How can I place an order for BZX84W-B36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B36-QX 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 BZX84W-B36-QX reliable?
The price and inventory of BZX84W-B36-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B36-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B36-QX?
BZX84W-B36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B36-QX 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 BZX84W-B36-QX?
For technical support, including BZX84W-B36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B36-QX requirements.
6.How does Aetrix verify that BZX84W-B36-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B36-QX 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 BZX84W-B36-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B36-QX?
All BZX84W-B36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B36-QX, 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 BZX84W-B36-QX part is unused and in its original packaging.
Return procedure for BZX84W-B36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B36-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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