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Nexperia USA Inc. BZX8450-B3V6-QR
- Part No.:
- BZX8450-B3V6-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B3V6-QR.pdf
- Description:
- DIODE ZENER 3.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,713
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Product details
Overview
BZX8450-B3V6-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in battery-powered systems. It delivers a nominal 3.6 V regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and 2.0 µA max reverse leakage at VR = 3.0 V - enabling stable operation in portable sensor nodes and automotive body electronics.
For engineers reviewing the BZX8450-B3V6-QR datasheet, BZX8450-B3V6-QR pinout, BZX8450-B3V6-QR application, or BZX8450-B3V6-QR equivalent, key selection criteria include its AEC-Q101 qualification, low 50 µA regulation current, 95 Ω typical differential resistance at IZ = 5 mA, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.53 V (min) to 3.67 V (max) at IZ = 50 µA. Its temperature coefficient is −3.5 mV/K, and it exhibits 160 pF capacitance at VR = 0 V and f = 1 MHz - supporting stable DC reference generation with minimal AC coupling.
The device features a non-connected (n.c.) terminal (Pin 2), anode (Pin 1), and cathode (Pin 3), enabling simplified PCB layout in space-constrained designs. Thermal resistance from junction to ambient is 500 K/W on standard FR4, limiting continuous power handling to 250 mW at Tamb ≤ 25 °C.
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 microcontroller reset circuits |
| Voltage Tolerance | ±2 % (B-series) - ensures tight regulation across production lots without post-assembly trimming |
| Differential Resistance | 95 Ω max at IZ = 5 mA - maintains stable output under small load variations in sensor supply rails |
| Reverse Leakage Current | 2.0 µA max at VR = 3.0 V - minimizes quiescent current drain in always-on battery monitoring circuits |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - supports operation on standard FR4 PCBs without heatsinking |
| Junction Temperature Limit | 150 °C - allows reliable use in under-hood automotive environments per AEC-Q101 |
| Package | SOT23 - 2.9 mm × 1.3 mm × 1.0 mm surface-mount footprint compatible with high-density PCB assembly |
Pinout & Package
SOT23 plastic surface-mount package with 3 terminals, 1.9 mm pitch, and standard footprint optimized for reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation to establish stable reference voltage |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or pad required beyond mechanical support |
| 3 | Cathode (K) | Connected to higher-potential node; carries regulated current path to ground or return rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive body control modules, door modules, and lighting ECUs requiring long-term reliability |
| Low 50 µA test current | Enables regulation in ultra-low-power applications such as coin-cell–powered IoT sensors and wake-up monitors |
| Optimized leakage profile | Intentional minor rise in IR improves switching speed and reduces broadband noise in analog signal chains |
| Two tolerance options | ±2 % (B-series) and ~±5 % (C-series) allow cost/performance trade-offs across consumer and industrial variants |
Applications
| Automotive Body Control Unit (BCU) | Portable Gas Sensor Module |
|---|---|
|
Use Scenario: Provides stable 3.6 V reference for ADC input scaling in LIN-based seat position sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise analog input range for 12-bit SAR ADC. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure <±10 LSB error over −40 °C to +125 °C operating range. |
Use Scenario: Supplies regulated bias to electrochemical gas sensing electrodes powered by CR2032 batteries. IC Role / Device Role / Timing Role: Low-current Zener regulator maintaining constant electrode polarization voltage. Use Value: 2.0 µA max IR at 3.0 V extends battery life beyond 5 years in sleep-mode operation. |
| Industrial PLC Input Protection | Medical Wearable ECG Front-End |
|
Use Scenario: Clamps and regulates 3.3 V logic-level signals entering isolated digital inputs of DIN-rail PLCs. IC Role / Device Role / Timing Role: Precision shunt regulator absorbing transient energy while holding reference stability. Use Value: 95 Ω rdiff ensures <50 mV droop under 500 µA load transients, preserving signal integrity. |
Use Scenario: Generates clean 3.6 V reference for instrumentation amplifier bias in dry-electrode ECG patches. IC Role / Device Role / Timing Role: Low-noise voltage reference suppressing common-mode interference in analog front-end. Use Value: Optimized leakage profile reduces 1/f noise contribution below 10 Hz, critical for ST-segment fidelity. |
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 | ±5 % tolerance (C-series), 160 Ω rdiff at IZ = 5 mA, same SOT23 package | Higher voltage drift and looser regulation - suitable for non-critical biasing where cost is primary | Select when ±5 % tolerance is acceptable and AEC-Q101 qualification is not required. |
| MMSZ4685T1G | 3.6 V nominal, ±5 %, 150 Ω rdiff, 350 mW Ptot, SOD-123 package | Larger footprint and higher power rating - better for higher-current reference paths but incompatible with SOT23 layouts | Choose only if board redesign accommodates SOD-123 and >250 mW dissipation is needed. |
Compared with BZX84-C3V6 and MMSZ4685T1G, the BZX8450-B3V6-QR uniquely combines AEC-Q101 qualification, ±2 % tolerance, and SOT23 compatibility - making it the sole option for space-constrained, automotive-grade 3.6 V reference designs requiring long-term parametric stability.
Availability
BZX8450-B3V6-QR is available at Aetrix Electronics and suitable for automotive body electronics, portable sensor nodes, industrial PLC input stages, and medical wearable front-ends requiring stable component supply across extended temperature ranges and lifecycle durations.
Supply support for BZX8450-B3V6-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX8450-Q series belongs to Nexperia's AEC-Q101–qualified Zener regulator portfolio, engineered specifically for low-power, noise-sensitive voltage reference and biasing functions in automotive and industrial edge electronics.
FAQ
What is the maximum reverse current at 3.0 V for BZX8450-B3V6-QR?
The maximum reverse current (IR) is 2.0 µA at VR = 3.0 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This value reflects the device's intentionally optimized leakage profile for low-noise operation and fast switching response in analog signal conditioning circuits.
Is Pin 2 electrically functional or a mechanical dummy lead?
Pin 2 is explicitly marked "n.c." (not connected) in the pinning diagram and electrical schematics. It is an internal dummy lead with no electrical connection - PCB land pattern must isolate it from traces and avoid solder bridging to prevent mechanical stress or unintended parasitic coupling.
How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?
At a nominal 3.6 V Zener voltage, the −3.5 mV/K coefficient causes approximately −0.35 V drift over a 100 K range (−40 °C to +60 °C), or −9.7 % relative change. Combined with ±2 % initial tolerance, total variation remains within ±12 % across that range - acceptable for non-precision biasing but insufficient for metrology-grade references.
Can BZX8450-B3V6-QR replace BZX84-C3V6 in existing SOT23 footprints?
Yes - both share identical SOT23 mechanical dimensions and pinout (anode/cathode/n.c.). However, BZX8450-B3V6-QR offers tighter ±2 % tolerance, lower rdiff (95 Ω vs. 160 Ω), and AEC-Q101 qualification. No layout change is needed, but system-level validation is recommended due to differences in leakage and thermal behavior.
BZX8450-B3V6-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:
- ±2%
- 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B3V6-QR FAQ
1.How can I place an order for BZX8450-B3V6-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B3V6-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-B3V6-QR reliable?
The price and inventory of BZX8450-B3V6-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-B3V6-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B3V6-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B3V6-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B3V6-QR?
BZX8450-B3V6-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B3V6-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-B3V6-QR?
For technical support, including BZX8450-B3V6-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B3V6-QR requirements.
6.How does Aetrix verify that BZX8450-B3V6-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B3V6-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-B3V6-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B3V6-QR?
All BZX8450-B3V6-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B3V6-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-B3V6-QR part is unused and in its original packaging.
Return procedure for BZX8450-B3V6-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B3V6-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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