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Nexperia USA Inc. BZX8450-C3V6-QR
- Part No.:
- BZX8450-C3V6-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C3V6-QR.pdf
- Description:
- DIODE ZENER 3.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
BZX8450-C3V6-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in battery-powered systems. It delivers a nominal 3.6 V regulation at 50 µA test current, with ±5 % tolerance, 2.0 µA max reverse leakage at 2.0 V, and 95 Ω dynamic resistance at 5 mA - enabling stable operation in portable sensor nodes and automotive microcontroller reset circuits.
For engineers reviewing the BZX8450-C3V6-QR datasheet, BZX8450-C3V6-QR pinout, BZX8450-C3V6-QR application, or BZX8450-C3V6-QR equivalent, key selection criteria include low-test-current regulation accuracy, AEC-Q101 qualification for automotive use, SOT23 footprint compatibility, and thermal resistance (Rth(j-sp) = 330 K/W) for PCB-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.42 V to 3.78 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and diode capacitance of 160 pF at 0 V. Its differential resistance drops to 95 Ω at 5 mA, supporting improved regulation under light load variations.
Qualified per AEC-Q101, it sustains junction temperatures up to 150 °C and ambient ranges from −55 °C to +150 °C. The non-repetitive peak reverse power dissipation reaches 40 W for 100 µs pulses, while continuous power is limited to 250 mW at Tamb ≤ 25 °C on standard FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V at IZ = 50 µA - enables accurate low-bias voltage reference for MCU brown-out detection |
| Voltage Tolerance | ±5 % - supports cost-sensitive automotive and industrial applications where tighter tolerance is not required |
| Dynamic Resistance | 95 Ω at IZ = 5 mA - ensures stable output under small-signal load transients in sensor signal conditioning |
| Reverse Leakage | 2.0 µA max at VR = 2.0 V - minimizes quiescent current drain in battery-critical wearable devices |
| Forward Voltage | 0.9 V max at IF = 10 mA - defines anode-to-cathode conduction threshold during polarity protection or clamping |
| Power Dissipation | 250 mW max at Tamb ≤ 25 °C - sets thermal design boundary for single-sided FR4 PCB layout with standard footprint |
| Junction Temperature | 150 °C max - permits operation in under-hood automotive environments without derating below 125 °C ambient |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-biased Zener configuration; must be routed with low-impedance path for stable biasing |
| 2 | Not Connected (n.c.) | Internally isolated terminal - no PCB trace or solder pad required; must remain unconnected to avoid parasitic coupling |
| 3 | Cathode (K) | Connects to higher-potential node; serves as reference output point and primary thermal path to PCB via solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in always-on IoT sensors and automotive wake-up circuits |
| AEC-Q101 qualification | Qualified for automotive applications - supports use in body control modules, ADAS sensor interfaces, and infotainment power rails |
| Optimized leakage profile | Intentional minor rise in leakage for fast switching and noise reduction - improves transient response in clock buffer bias networks |
| Thermal performance | Rth(j-sp) = 330 K/W - enables reliable heat transfer from cathode to PCB copper, critical for sustained 250 mW operation |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Bias Network |
|---|---|
|
Use Scenario: Provides precise 3.6 V reference to enable reset assertion when supply voltage falls below threshold in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference element in RC-based reset generator, defining trip point independent of VCC variation. Use Value: ±5 % tolerance and −3.5 mV/K TC ensure consistent reset voltage across −40 °C to +125 °C under-hood conditions. |
Use Scenario: Supplies stable bias voltage to electrochemical gas sensing elements in battery-operated air quality monitors. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator maintaining constant bias across sensor electrodes during intermittent sampling. Use Value: 2.0 µA max leakage at 2.0 V preserves multi-year battery life; 160 pF capacitance avoids signal distortion at sensor output bandwidths <10 kHz. |
| USB-C Power Negotiation Reference | Industrial PLC Analog Input Protection |
|
Use Scenario: Generates fixed 3.6 V reference for USB PD controller ADC input scaling in compact charging accessories. IC Role / Device Role / Timing Role: Precision voltage source for analog-to-digital conversion of CC line voltage during PDO negotiation. Use Value: 95 Ω dynamic resistance ensures minimal code error (<0.1 LSB) under 10 µA load variation from ADC input impedance. |
Use Scenario: Clamps overvoltage transients on 4–20 mA loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting input voltage to 3.78 V maximum before protection IC activation. Use Value: 40 W non-repetitive surge rating (100 µs) absorbs IEC 61000-4-4 EFT bursts without degradation; SOT23 footprint fits tight board spacing. |
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-C3V6,115 (Nexperia) | Same 3.6 V, ±5 %, SOT23 package but lacks AEC-Q101 qualification and has higher 5.0 µA leakage at 2.0 V | Restricted to commercial-grade consumer electronics; unsuitable for automotive or industrial temperature cycling | Select only for cost-sensitive non-automotive designs where qualification and leakage are not critical |
| MMSZ5227B-TP (Micro Commercial Components) | 3.6 V, ±5 %, SOD-123 package; 100 Ω rdiff at 20 mA; 10 µA leakage at 2.0 V; no AEC-Q101 data available | Larger footprint (3.7 mm × 1.6 mm) limits high-density routing; higher leakage increases battery drain in ultra-low-power systems | Use only when SOD-123 is already standardized in legacy designs and automotive compliance is not required |
Compared with BZX8450-C3V6-QR, the BZX84-C3V6,115 offers identical electrical specs but omits automotive qualification and exhibits 2.5× higher leakage, while MMSZ5227B-TP trades smaller size for inferior thermal resistance (Rth(j-a) ≈ 600 K/W) and unverified reliability in harsh environments.
Availability
BZX8450-C3V6-QR is available at Aetrix Electronics and suitable for automotive microcontroller reset circuits, portable gas sensor bias networks, and USB-C power negotiation reference designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C3V6-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, high-reliability discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in space-constrained, thermally demanding automotive and portable electronics applications.
FAQ
What is the maximum continuous power dissipation for BZX8450-C3V6-QR?
The maximum continuous power dissipation is 250 mW at ambient temperature ≤ 25 °C when mounted on a standard FR4 PCB with single-sided 70 μm copper and tin-plated finish. Derating is required above 25 °C at 2.0 mW/°C based on Rth(j-a) = 500 K/W.
Is BZX8450-C3V6-QR suitable for automotive applications?
Yes - it is fully qualified per AEC-Q101 for stress testing including high-temperature operating life, temperature cycling, and humidity bias HAST. It operates reliably from −55 °C to +150 °C junction temperature, meeting requirements for under-hood and cabin ECUs.
How does the "C" suffix differ from "B" in the BZX8450-Q series?
The "C" suffix denotes ±5 % voltage tolerance and incorporates intentional minor leakage current optimization for faster switching and reduced noise, whereas "B" parts offer ±2 % tolerance and lower leakage. For BZX8450-C3V6-QR, this means 2.0 µA max IR at 2.0 V versus ≤1.0 µA for the "B" variant.
What is the thermal resistance from junction to solder point (Rth(j-sp))?
Rth(j-sp) is 330 K/W, measured at the cathode solder point on a standard FR4 PCB. This value reflects direct thermal conduction from the die to the PCB copper through the cathode terminal, enabling more accurate thermal modeling than junction-to-ambient metrics.
BZX8450-C3V6-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C3V6-QR FAQ
1.How can I place an order for BZX8450-C3V6-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C3V6-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-C3V6-QR reliable?
The price and inventory of BZX8450-C3V6-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-C3V6-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C3V6-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V6-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C3V6-QR?
BZX8450-C3V6-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C3V6-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-C3V6-QR?
For technical support, including BZX8450-C3V6-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V6-QR requirements.
6.How does Aetrix verify that BZX8450-C3V6-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C3V6-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-C3V6-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C3V6-QR?
All BZX8450-C3V6-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V6-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-C3V6-QR part is unused and in its original packaging.
Return procedure for BZX8450-C3V6-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C3V6-QR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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