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Nexperia USA Inc. BZX8450-C16R
- Part No.:
- BZX8450-C16R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C16R.pdf
- Description:
- DIODE ZENER 16V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,801
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Product details
Overview
BZX8450-C16R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 16 V regulation at 50 µA test current, with ±5 % tolerance, 200 mW total power dissipation, and 12.1 V minimum / 16.8 V maximum working voltage range. It is used in battery-powered sensor signal conditioning circuits requiring stable low-power reference.
For engineers reviewing the BZX8450-C16R datasheet, BZX8450-C16R pinout, BZX8450-C16R application, or BZX8450-C16R equivalent, this page provides verified electrical characteristics, thermal resistance (330 K/W junction-to-solder-point), differential resistance (200 Ω at 5 mA), temperature coefficient (+10.4 mV/K), and cathode/anode terminal mapping - all critical for low-current analog reference design and PCB layout validation.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA, enabling ultra-low-bias operation ideal for coin-cell or energy-harvesting systems. Its intentional leakage profile (per AN90031) reduces noise and improves switching response versus standard Zeners.
Thermal performance is defined for FR4 PCB mounting: Rth(j-a) = 500 K/W (free air) and Rth(j-sp) = 330 K/W (to cathode solder point), directly impacting derating in compact layouts. The SOT23 package supports reflow and wave soldering per standardized footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 15.2 V to 16.8 V at IZ = 5 mA - defines usable reference window under typical operating current |
| Tolerance | ±5 % - specifies worst-case deviation from nominal 16 V for accuracy-critical references |
| Differential Resistance (rdiff) | 200 Ω max at IZ = 5 mA - determines output impedance and load regulation error |
| Temperature Coefficient (SZ) | +10.4 mV/K - quantifies drift magnitude per °C ambient change in reference stability |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - sets forward conduction loss when used in dual-direction protection |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - limits continuous power handling on standard FR4 PCB |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 12.1 V - ensures minimal quiescent leakage below regulation threshold |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with exposed cathode tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating on PCB layout |
| 3 | Cathode (K) | Connected to higher-potential node; primary heat path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microamp-level bias networks without loading |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces high-frequency noise and improves transient response |
| Thermal resistance control | Rth(j-sp) = 330 K/W - allows accurate thermal modeling from junction to PCB copper |
| Standardized SOT23 footprint | Compatible with IPC-7351B generic land pattern - ensures manufacturability across assembly lines |
| Two tolerance grades | ±2 % (B-series) and ±5 % (C-series) - supports cost/performance trade-off in volume production |
Applications
| Portable Sensor Biasing | Low-Power Reference Supply |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wearable health monitors powered by CR2032 batteries. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix analog front-end bias point. Use Value: Enables <1 µA quiescent current in sensor bias network while maintaining ±1.5 % reference accuracy over −20 °C to +70 °C. |
Use Scenario: Generating precise 16 V reference for ADC input scaling in handheld multimeters with alkaline battery supply. IC Role / Device Role / Timing Role: Low-current voltage regulator establishing fixed reference rail independent of battery discharge curve. Use Value: Delivers 16 V ±0.8 V regulation at 50 µA, reducing calibration drift caused by supply variation in 3½-digit measurement circuits. |
| RF Front-End Protection | Microcontroller Reset Circuit |
Use Scenario: Clamping RF detector diode output in sub-GHz ISM band receivers to prevent overvoltage damage during antenna coupling transients. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting voltage clamp on signal path. Use Value: Limits peak voltage to 16.8 V with <100 ns response, leveraging low capacitance (75 pF) to preserve RF signal integrity up to 1 GHz. |
Use Scenario: Setting brown-out detection threshold for ARM Cortex-M0+ microcontrollers in smart home nodes using single-cell Li-ion supply. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding reset supervisor IC input. Use Value: Provides 16 V reference with <0.05 µA leakage at 12.1 V, ensuring reliable reset assertion down to 3.0 V battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245BS | 16 V nominal, ±5 %, 200 mW, but rated at IZ = 20 mA - higher test current increases rdiff to 25 Ω | Requires higher bias current; less suitable for µA-level circuits | Select when higher current drive capability is needed and board space permits larger SOT-23 variant |
| Vishay BZX84-C16 | Identical 16 V/±5 %/250 mW spec, but uses legacy marking and lacks AN90031 leakage optimization | No intentional leakage tuning - exhibits higher broadband noise in precision references | Acceptable for general-purpose regulation where noise floor is non-critical |
Compared with MMBZ5245BS and BZX84-C16, BZX8450-C16R offers superior low-current stability (50 µA test point), optimized noise behavior, and tighter thermal resistance specification - making it preferred for battery-constrained, high-fidelity analog reference designs.
Availability
BZX8450-C16R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power reference supplies, RF front-end protection, and microcontroller reset circuits requiring stable component supply across industrial and consumer product lifecycles.
Supply support for BZX8450-C16R 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, headquartered in Nijmegen, Netherlands.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding stable voltage reference with minimal quiescent draw.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C16R?
The guaranteed minimum breakdown voltage is 15.2 V at IZ = 5 mA, with upper limit 16.8 V. At lower currents (e.g., 50 µA), the knee occurs between 12.1 V and 15.2 V depending on unit variation. Absolute maximum reverse voltage is not defined - operation above 16.8 V risks exceeding power limits and thermal runaway.
Can BZX8450-C16R be used in forward conduction mode?
Yes - its forward voltage is specified ≤ 0.9 V at 10 mA, making it suitable as a low-drop rectifier or ESD clamp in bidirectional protection schemes. However, its primary design intent and characterization are for reverse-bias regulation; forward conduction should be limited to brief transients or low-duty-cycle signals.
How does the "C" suffix differ from "B" in the BZX8450 series?
The "C" suffix denotes ±5 % tolerance and incorporates an intentional minor rise in leakage current per application note AN90031, optimizing noise reduction and switching speed. The "B" suffix indicates ±2 % tolerance and standard leakage behavior - suitable where tighter voltage accuracy outweighs noise sensitivity.
Is pin 2 truly unconnected, or can it be grounded for thermal improvement?
Pin 2 is internally not connected (n.c.) - no bond wire or die connection exists. Grounding it provides no electrical or thermal benefit and risks solder bridging or unintended shorts. Thermal path is exclusively through pin 3 (cathode) to PCB; pin 2 must remain electrically isolated per Nexperia's mechanical drawings and reliability testing.
BZX8450-C16R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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-C16R FAQ
1.How can I place an order for BZX8450-C16R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C16R 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-C16R reliable?
The price and inventory of BZX8450-C16R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C16R is usually 5 days.
3.What payment methods are accepted for BZX8450-C16R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C16R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C16R?
BZX8450-C16R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C16R 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-C16R?
For technical support, including BZX8450-C16R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C16R requirements.
6.How does Aetrix verify that BZX8450-C16R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C16R 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-C16R meets industry standards.
7.What is the process for return or replacement of BZX8450-C16R?
All BZX8450-C16R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C16R, 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-C16R part is unused and in its original packaging.
Return procedure for BZX8450-C16R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C16R Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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