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Nexperia USA Inc. BZX8450-C3V6R
- Part No.:
- BZX8450-C3V6R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C3V6R.pdf
- Description:
- DIODE ZENER 3.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:650
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Product details
Overview
BZX8450-C3V6R 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 3.6 V regulation at 50 µA test current, with ±5 % tolerance, 2.0 µA max reverse leakage at VR = 3.0 V, and 95 Ω typical differential resistance at IZ = 5 mA - enabling stable low-power rail stabilization in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-C3V6R datasheet, BZX8450-C3V6R pinout, BZX8450-C3V6R application, or BZX8450-C3V6R equivalent, this page provides verified electrical parameters, validated SOT23 terminal mapping, confirmed thermal resistance (330 K/W to solder point), and direct alternative part comparisons for low-current Zener replacement scenarios.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener voltage (3.42–3.78 V). Its design targets ultra-low bias conditions: specified at 50 µA test current, with <2.0 µA reverse leakage at 3.0 V and −3.5 mV/K temperature coefficient - minimizing drift in ambient-temperature-sensitive applications.
The BZX8450-C3V6R features intentional minor leakage optimization per AN90031 for improved switching noise suppression and faster transient response. Its 250 mW total power dissipation rating is defined under FR4 PCB mounting with single-sided 70 µm copper, and thermal resistance from junction to solder point is 330 K/W - critical for thermal design in space-constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.42 V to 3.78 V at IZ = 50 µA - defines precise regulation window for low-bias reference generation |
| Differential Resistance (rdiff) | 95 Ω typical at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage (IR) | ≤2.0 µA at VR = 3.0 V - ensures minimal quiescent current draw in always-on circuits |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - supports use as low-drop clamp or ESD protection path |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Thermal Resistance (Rth(j-sp)) | 330 K/W to cathode solder point - enables accurate junction temperature estimation during thermal design |
| Temperature Coefficient (SZ) | −3.5 mV/K - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal for forward conduction; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Regulated output node; connected to higher-potential rail and current-limiting resistor in shunt topology |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables reliable regulation in µA-level bias networks without forcing excessive current |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces high-frequency noise and improves transient switching behavior |
| Tight voltage tolerance | ±5 % (C-series) - balances cost and precision for non-critical reference applications |
| Compact SMT footprint | SOT23 package - supports high-density PCB layouts in wearables, IoT sensors, and portable medical devices |
| Controlled thermal path | Rth(j-sp) = 330 K/W - allows predictable thermal modeling when cathode is soldered to copper pour |
Applications
| Microcontroller Reset Circuit | Portable Sensor Bias Reference |
|---|---|
|
Use Scenario: Generating a stable 3.6 V threshold for brown-out detection in ARM Cortex-M0+ MCUs powered by coin-cell batteries. IC Role / Device Role / Timing Role: Shunt Zener reference providing precise trip voltage to supervisor IC input. Use Value: 2.0 µA leakage ensures >10-year battery life; ±5 % tolerance meets reset accuracy requirements per JEDEC JESD78. |
Use Scenario: Supplying bias voltage to analog front-end of a low-power environmental sensor (e.g., BME280) in BLE beacon. IC Role / Device Role / Timing Role: Low-current voltage reference for ADC reference divider and op-amp offset trimming. Use Value: 50 µA test current matches sensor's sleep-mode current budget; −3.5 mV/K TC minimizes temperature-induced measurement drift. |
| USB-C Power Negotiation Clamp | IoT Node LDO Input Stabilization |
|
Use Scenario: Clamping CC line voltage during USB PD communication to prevent overvoltage damage to Type-C controller. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing transient spikes on 3.3 V logic rail. Use Value: Optimized leakage profile per AN90031 suppresses high-frequency coupling noise from PD PHY bursts. |
Use Scenario: Pre-regulating noisy 5 V supply before feeding into low-noise LDO (e.g., TPS7A05) powering RF transceiver. IC Role / Device Role / Timing Role: Passive pre-filter stabilizing input to reduce LDO PSRR burden and improve transient response. Use Value: 95 Ω rdiff limits input ripple transfer; 250 mW Ptot accommodates brief 100 mA inrush without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F (Diodes Inc.) | 3.3 V nominal, ±5 %, 100 Ω rdiff, 10 µA IR @ 2.64 V | Higher leakage and lower VZ - less suitable for 3.6 V precision bias but better for generic 3.3 V clamping | Select when 3.3 V regulation suffices and higher leakage is acceptable for cost-sensitive designs |
| BZX84-C3V6 (Nexperia, legacy marking) | Identical electrical specs, same SOT23 package, but lacks AN90031 leakage optimization | No intentional leakage tuning - slightly higher noise floor and slower switching in dynamic bias paths | Prefer BZX8450-C3V6R where low-noise sensor bias or fast-switching reset is required |
Compared with MMBZ5226BS-7-F, BZX8450-C3V6R offers tighter 3.6 V targeting and lower leakage for precision bias; versus legacy BZX84-C3V6, it adds documented leakage optimization for noise-sensitive applications - making it the preferred choice for modern low-power embedded references.
Availability
BZX8450-C3V6R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, USB-C line clamping, and IoT node LDO pre-regulation requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX8450-C3V6R 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-bias voltage reference and stabilization in battery-powered and space-constrained electronics.
FAQ
What is the maximum continuous reverse current the BZX8450-C3V6R can sustain without exceeding its 250 mW power limit?
At 3.6 V Zener voltage, the absolute maximum continuous reverse current is 69.4 mA (250 mW ÷ 3.6 V), but practical operation must stay below 20 mA per limiting values table to maintain reliability and avoid thermal runaway. Derating to 15 mA is recommended for sustained operation at 25 °C ambient on standard FR4 PCB.
Can Pin 2 (n.c.) be used as a thermal pad or grounded for improved heat dissipation?
No - Pin 2 is internally not connected and must remain electrically floating. Connecting it to ground, power, or a thermal plane violates the device's internal construction and may cause parametric shift or premature failure. Thermal performance relies solely on cathode (Pin 3) solder joint integrity and PCB copper area.
How does the "intentional minor rise of leakage current" improve noise reduction per AN90031?
Per Application Note AN90031, the controlled increase in sub-breakdown leakage improves carrier recombination dynamics, reducing avalanche noise and high-frequency oscillation susceptibility during transient events - particularly beneficial in reset circuits and analog sensor bias paths where low-noise DC stability is critical.
Is the BZX8450-C3V6R suitable for use in automotive applications?
No - this device is not AEC-Q200 qualified and lacks automotive-grade screening, temperature range validation (−40 °C to +125 °C), or stress testing per automotive standards. Nexperia explicitly states non-automotive qualification in the legal disclaimers; use only in commercial or industrial environments with ambient operating range −55 °C to +150 °C.
BZX8450-C3V6R 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:
- 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C3V6R FAQ
1.How can I place an order for BZX8450-C3V6R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C3V6R 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-C3V6R reliable?
The price and inventory of BZX8450-C3V6R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C3V6R is usually 5 days.
3.What payment methods are accepted for BZX8450-C3V6R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V6R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C3V6R?
BZX8450-C3V6R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C3V6R 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-C3V6R?
For technical support, including BZX8450-C3V6R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V6R requirements.
6.How does Aetrix verify that BZX8450-C3V6R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C3V6R 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-C3V6R meets industry standards.
7.What is the process for return or replacement of BZX8450-C3V6R?
All BZX8450-C3V6R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V6R, 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-C3V6R part is unused and in its original packaging.
Return procedure for BZX8450-C3V6R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C3V6R Tags
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