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Nexperia USA Inc. BZX8450-C36VL
- Part No.:
- BZX8450-C36VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C36VL.pdf
- Description:
- DIODE ZENER 36V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,970
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Product details
Overview
BZX8450-C36VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and clamping in battery-powered systems. It delivers 36 V nominal Zener voltage at 50 µA test current, ±5 % tolerance, 250 mW total power dissipation, and 350 Ω differential resistance at 5 mA, enabling stable regulation in portable instrumentation and sensor biasing.
For engineers reviewing the BZX8450-C36VL datasheet, BZX8450-C36VL pinout, BZX8450-C36VL application, or BZX8450-C36VL equivalent, this page provides verified electrical characteristics, thermal behavior, SOT23 terminal mapping, and real-world use cases for low-power voltage stabilization and overvoltage protection circuits.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 34.2 V (min) to 37.8 V (max) at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and diode capacitance of 45 pF at 0 V. Its low test current enables minimal quiescent power draw in always-on monitoring circuits.
The device features intentional leakage optimization per AN90031 for fast switching transients and reduced noise in signal conditioning paths. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, limiting continuous power handling without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2 V to 37.8 V at IZ = 50 µA - defines precise clamping threshold for 3.3 V/5 V rail protection |
| Tolerance | ±5 % - supports cost-sensitive designs where tight regulation is secondary to low standby current |
| Differential Resistance (rdiff) | 350 Ω at IZ = 5 mA - determines output impedance and load regulation error under dynamic current changes |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures low-loss forward conduction during transient polarity reversal |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum steady-state power budget on standard FR4 PCB |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 27.3 V - guarantees ultra-low leakage below knee voltage for high-impedance sensing nodes |
| Junction Temperature (Tj) | −55 °C to +150 °C - enables operation in extended industrial environments without derating |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node; reverse-biased during Zener operation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask opening required |
| 3 | Cathode (K) | Connects to higher-potential node; carries regulated reverse current during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby power in battery-critical applications like IoT sensors and wearables |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and suppresses switching noise in analog front-ends |
| Two tolerance grades | ±2 % (B-series) and ±5 % (C-series) - allows trade-off between precision and cost in volume production |
| Thermal robustness | 150 °C max junction temperature - supports reliable operation in sealed enclosures without active cooling |
| Small-footprint packaging | SOT23 footprint - enables high-density layout in space-constrained modules such as medical patches and handheld testers |
Applications
| Portable Sensor Biasing | USB-C ESD Clamp Reference |
|---|---|
|
Use Scenario: Providing stable 36 V reference for MEMS pressure sensor excitation in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp for analog front-end supply rail. Use Value: Enables <1 µA quiescent current while maintaining ±1.8 V regulation window across −40 °C to +85 °C. |
Use Scenario: Acting as secondary clamping reference in USB-C port protection circuits alongside TVS diodes. IC Role / Device Role / Timing Role: Precision voltage threshold element defining clamping trigger point for high-speed data line surge suppression. Use Value: Delivers repeatable 36 V breakdown with <45 pF capacitance to avoid signal integrity degradation on SuperSpeed lanes. |
| Industrial PLC Input Protection | Low-Power ADC Reference |
|
Use Scenario: Protecting 24 V DC input channels in programmable logic controllers against field-wiring transients. IC Role / Device Role / Timing Role: Reverse-biased Zener shunt regulator absorbing induced surges up to 40 W non-repetitive peak power. Use Value: Limits channel voltage to ≤37.8 V with 350 Ω dynamic impedance, preventing damage to downstream optocouplers and level shifters. |
Use Scenario: Supplying clean reference voltage to 16-bit SAR ADCs in portable multimeters and calibration tools. IC Role / Device Role / Timing Role: Low-noise voltage reference source with optimized leakage for high-impedance sampling networks. Use Value: Reduces reference drift by >30 % versus standard Zeners due to intentional leakage tuning per AN90031. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36 | Same 36 V nominal voltage, ±5 % tolerance, but rated for 350 mW Ptot and lacks AN90031 leakage optimization | Higher power handling suits fixed-line supplies; less suitable for ultra-low-IQ battery designs | Select when board-level thermal margin exceeds 100 mW and noise sensitivity is low |
| MMSZ5245B | 36 V nominal, ±5 %, 500 mW Ptot, SOD-123 package, rdiff = 25 Ω at 20 mA - stiffer regulation but larger footprint and higher IZ | Preferred for high-current reference buffering; incompatible with SOT23 layout and low-IZ biasing | Choose only if circuit requires <50 Ω dynamic impedance and can accommodate 2.7 mm × 1.6 mm footprint |
Compared with BZX84-C36 and MMSZ5245B, the BZX8450-C36VL uniquely balances ultra-low 50 µA test current, SOT23 miniaturization, and AN90031-optimized leakage-making it the sole choice for sub-µA standby regulation in space- and energy-constrained edge devices.
Availability
BZX8450-C36VL is available at Aetrix Electronics and suitable for portable sensor biasing, USB-C ESD clamp reference, and industrial PLC input protection requiring stable component supply across automotive-grade temperature ranges and long-lifecycle programs.
Supply support for BZX8450-C36VL 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for battery-powered and space-constrained applications demanding minimal leakage, stable low-current regulation, and robust thermal performance in SOT23.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C36VL?
The guaranteed minimum Zener voltage is 34.2 V at IZ = 50 µA, meaning breakdown begins no earlier than this value. The absolute maximum reverse voltage before permanent damage is defined by limiting values: non-repetitive peak reverse power dissipation reaches 40 W for 100 µs pulses, but sustained reverse bias above 37.8 V risks exceeding power limits on standard FR4 PCB.
Can BZX8450-C36VL be used in forward conduction mode?
Yes-it exhibits ≤0.9 V forward voltage at 10 mA, making it usable as a low-drop rectifier or polarity protection diode. However, its primary design intent is reverse-bias Zener operation; forward current capability is limited to 200 mA continuous per absolute maximum ratings, and thermal resistance remains 500 K/W even in forward conduction.
How does the "C" suffix differ from "B" in the BZX8450 series?
The "C" suffix denotes ±5 % voltage tolerance and intentional minor leakage current optimization per AN90031 for faster switching and lower noise. The "B" suffix indicates ±2 % tolerance and standard leakage behavior. Both share identical SOT23 package, pinout, and thermal characteristics, but C-series parts are preferred for low-IQ and noise-sensitive applications.
Is pin 2 truly unconnected, or does it serve a thermal function?
Pin 2 is electrically unconnected (n.c.) per datasheet Table 2 and internal construction-no bond wire or die connection exists. It serves no electrical or thermal function; mounting it to copper pour provides no thermal benefit, as Rth(j-sp) is measured only at the cathode tab (pin 3). PCB layout must leave pin 2 floating per Nexperia's recommended footprint.
BZX8450-C36VL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C36VL FAQ
1.How can I place an order for BZX8450-C36VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C36VL 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-C36VL reliable?
The price and inventory of BZX8450-C36VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C36VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C36VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C36VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C36VL?
BZX8450-C36VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C36VL 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-C36VL?
For technical support, including BZX8450-C36VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C36VL requirements.
6.How does Aetrix verify that BZX8450-C36VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C36VL 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-C36VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C36VL?
All BZX8450-C36VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C36VL, 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-C36VL part is unused and in its original packaging.
Return procedure for BZX8450-C36VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C36VL 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
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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