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Nexperia USA Inc. BZX8450-B36-QR
- Part No.:
- BZX8450-B36-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B36-QR.pdf
- Description:
- DIODE ZENER 36V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,630
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Product details
Overview
BZX8450-B36-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in low-power circuits. It delivers a nominal 36 V regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-B36-QR datasheet, BZX8450-B36-QR pinout, BZX8450-B36-QR application, or BZX8450-B36-QR equivalent, this device is selected for stable low-current regulation in battery-powered sensors, automotive ECUs, and portable instrumentation where leakage-sensitive operation and thermal reliability are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 35.3 V to 36.7 V at IZ = 50 µA. Its differential resistance is ≤350 Ω at IZ = 5 mA, and temperature coefficient is +0.05 mV/K - indicating near-zero drift across operating temperature.
The device features intentional minor leakage optimization per AN90031 for fast switching and noise reduction. It is rated for junction temperatures up to 150 °C and qualified to AEC-Q101, confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 35.3 V to 36.7 V at IZ = 50 µA - defines precise clamping threshold for low-bias reference circuits |
| Tolerance | ±2 % - enables tight voltage margin control without post-calibration in production |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC or pulsed power handling |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal conduction loss when used in forward-biased protection paths |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 27.3 V - guarantees ultra-low leakage below regulation knee, critical for battery runtime |
| Thermal Resistance (Rth(j-a)) | 500 K/W in free air - determines junction-to-ambient temperature rise under load for thermal design margining |
| AEC-Q101 Qualified | Yes - validates robustness for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and standard FR4 reflow footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-bias configuration; forward conduction path entry |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating - no PCB trace or solder mask required |
| 3 | Cathode (K) | Connects to higher-potential node; primary current return path and thermal interface point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in micro-power systems (e.g., coin-cell IoT sensors) |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and high-frequency noise in feedback loops |
| Automotive qualification | AEC-Q101 compliant - supports deployment in engine control modules, body electronics, and ADAS power rails |
| Two tolerance options | ±2 % (B-series) and ~±5 % (C-series) - allows cost/performance trade-off without redesigning bias networks |
| Thermal performance | Rth(j-sp) = 330 K/W - enables direct thermal coupling to copper pour for improved power handling in compact layouts |
Applications
| Automotive Body Control Module | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Providing stable 36 V reference for analog front-end amplifiers in door module LIN transceivers. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and op-amp biasing. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure signal integrity and long-term calibration stability over temperature and lifetime. |
Use Scenario: Supplying regulated bias voltage to electrochemical gas sensor elements powered by 3.7 V Li-ion cells with boost converter. IC Role / Device Role / Timing Role: Low-current voltage reference in high-impedance sensor bias network. Use Value: 50 µA test current and sub-0.05 µA leakage at 27.3 V extend battery life beyond 5 years in maintenance-free deployments. |
| Industrial PLC Input Protection | Medical Wearable Power Monitoring |
Use Scenario: Clamping transient overvoltage on 24 V DC input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Reverse-bias overvoltage limiter protecting downstream TVS and ESD structures. Use Value: 250 mW Ptot and 40 W non-repetitive surge rating (tp = 100 µs) absorb IEC 61000-4-4 bursts without degradation. |
Use Scenario: Generating precision reference for battery voltage monitoring circuit in FDA-cleared wearable ECG patch. IC Role / Device Role / Timing Role: Stable voltage reference for delta-sigma ADC reference divider. Use Value: Near-zero temperature coefficient (+0.05 mV/K) eliminates gain drift across 0–50 °C patient-use range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36-Q | ±5 % tolerance, higher leakage (≤0.1 µA at VR = 27.3 V), same SOT23 package | Acceptable where cost sensitivity outweighs precision; unsuitable for <1 µA bias networks | Select when calibration headroom exists and automotive qualification is not required |
| MMSZ5241B-TP | ±5 % tolerance, 500 mW Ptot, no AEC-Q101 qualification, SOD-123 package | Higher power but larger footprint; lacks automotive reliability validation and low-leakage optimization | Choose only for non-automotive industrial designs requiring >250 mW dissipation |
Compared with BZX8450-B36-QR, the BZX84-C36-Q trades regulation accuracy and leakage performance for cost, while MMSZ5241B-TP offers higher power but sacrifices automotive qualification, thermal resistance, and low-current stability - making the BZX8450-B36-QR optimal for space-constrained, battery-sensitive, and automotive-grade applications.
Availability
BZX8450-B36-QR is available at Aetrix Electronics and suitable for automotive body electronics, portable sensor biasing, and industrial PLC input protection requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for BZX8450-B36-QR 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX8450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current, low-leakage voltage regulation in harsh-environment electronics where precision, longevity, and qualification rigor are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B36-QR?
The BZX8450-B36-QR exhibits a nominal Zener voltage of 36 V, with guaranteed minimum and maximum values of 35.3 V and 36.7 V respectively at IZ = 50 µA. Below 35.3 V, reverse current remains ≤0.05 µA - confirming sharp knee behavior and stable clamping onset within its specified operating range.
Can BZX8450-B36-QR be used in series for higher voltage regulation?
No - the BZX8450-B36-QR is not characterized or qualified for series connection. Its leakage current mismatch, thermal coupling limitations, and lack of matched unit binning make cascaded operation unreliable. For >36 V regulation, select a single-device solution such as BZX8450-B43-Q or BZX8450-B47-Q.
Is pin 2 truly unconnected, or does it serve a mechanical function?
Pin 2 is electrically unconnected (n.c.) and has no internal bond wire or die attachment. It serves solely as a mechanical stabilization feature in the SOT23 mold compound - no PCB routing, soldering, or grounding is required or recommended. Leaving it floating avoids parasitic coupling in high-impedance reference paths.
How does the "intentional minor rise of leakage current" improve noise performance?
Per AN90031, the controlled increase in leakage current reduces carrier trapping/detrapping effects at the depletion region interface, suppressing low-frequency (1/f) noise and minimizing switching transients during dynamic load changes - directly improving SNR in precision analog measurement circuits.
BZX8450-B36-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- 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:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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:
- TO-236AB
BZX8450-B36-QR FAQ
1.How can I place an order for BZX8450-B36-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B36-QR 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 BZX8450-B36-QR reliable?
The price and inventory of BZX8450-B36-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B36-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B36-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B36-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B36-QR?
BZX8450-B36-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B36-QR 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 BZX8450-B36-QR?
For technical support, including BZX8450-B36-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B36-QR requirements.
6.How does Aetrix verify that BZX8450-B36-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B36-QR 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 BZX8450-B36-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B36-QR?
All BZX8450-B36-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B36-QR, 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 BZX8450-B36-QR part is unused and in its original packaging.
Return procedure for BZX8450-B36-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B36-QR Tags
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MMBZ5240B-7-F
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