My Inquiry
My Account
Nexperia USA Inc. BZX8450-C3V0R
- Part No.:
- BZX8450-C3V0R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C3V0R.pdf
- Description:
- DIODE ZENER 3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:771
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX8450-C3V0R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in ultra-low-power circuits. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±5 % tolerance, 600 Ω dynamic resistance at 5 mA, and 0.8 µA max reverse leakage at VR = 3.0 V. It is used in battery-powered sensor nodes and portable MCU reset circuits requiring stable low-current references.
For engineers reviewing the BZX8450-C3V0R datasheet, BZX8450-C3V0R pinout, BZX8450-C3V0R application, or BZX8450-C3V0R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and validated alternatives for low-power Zener replacement scenarios.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across anode–cathode terminals under reverse-bias conditions. Its specified regulation point (3.0 V) is guaranteed at IZ = 50 µA, enabling reliable operation in micro-power standby modes where traditional regulators draw excessive quiescent current.
The BZX8450-C3V0R features intentional minor leakage optimization per AN90031, improving switching speed and reducing noise in signal conditioning paths. Its 500 K/W junction-to-ambient thermal resistance reflects standard FR4 PCB mounting with single-sided 70 μm copper, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 50 µA - defines precise reference point for low-bias analog sensing and reset threshold generation |
| Voltage Tolerance | ±5 % - supports cost-sensitive designs where tighter tolerance is unnecessary and board-level trimming is avoided |
| Dynamic Resistance | 600 Ω at IZ = 5 mA - indicates moderate regulation stiffness; suitable for static references but not high-ripple suppression |
| Reverse Leakage Current | 0.8 µA max at VR = 3.0 V - enables <1 µA standby current in always-on monitoring circuits |
| Forward Voltage | 0.9 V max at IF = 10 mA - ensures minimal forward conduction loss when used bidirectionally or in protection roles |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets absolute thermal limit on PCB with standard SOT23 footprint and single-sided copper |
| Junction Temperature Limit | 150 °C - defines maximum allowable die temperature during surge or elevated ambient operation |
Pinout & Package
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 space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal in forward bias; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Regulated output node in reverse bias; tied to supply rail being stabilized or reference input of comparator |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables use in energy-harvesting and coin-cell-powered systems where bias current must be sub-100 µA |
| Optimized Leakage Profile | Intentional minor rise per AN90031 - reduces switching transients and broadband noise in ADC reference buffers |
| Thermal Performance | Rth(j-a) = 500 K/W - allows direct thermal modeling on standard FR4 without heatsinking or copper pour augmentation |
| Small-Signal Capacitance | 170 pF at VR = 0 V, f = 1 MHz - limits high-frequency coupling in RF-adjacent analog sections without requiring shielding |
| Robust Surge Rating | PZSM = 40 W (tp = 100 µs) - withstands ESD-induced transients in handheld device front-end protection networks |
Applications
| Portable Sensor Biasing | MCU Reset Threshold Generation |
|---|---|
|
Use Scenario: Providing stable 3.0 V reference to analog front-end of BLE temperature/humidity sensor node powered by CR2032. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing fixed bias point for op-amp signal conditioning and ADC reference divider. Use Value: Enables <2 µA total system standby current while maintaining ±10 mV reference stability over −40 °C to +85 °C. |
Use Scenario: Generating clean 3.0 V reset threshold for ARM Cortex-M0+ microcontroller in smart lock module. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping reset line to ensure deterministic brown-out detection during battery voltage sag. Use Value: Delivers 3.0 V ±0.15 V trip point with <100 ns response to voltage dip, eliminating need for dedicated reset IC. |
| Low-Power Comparator Reference | USB-C Port Voltage Clamp |
|
Use Scenario: Supplying reference voltage to window comparator monitoring Li-ion cell voltage in wearable health tracker. IC Role / Device Role / Timing Role: Precision Zener source for dual-op-amp comparator inputs detecting overcharge/over-discharge thresholds. Use Value: Maintains 3.0 V reference accuracy within ±2 % over full battery discharge curve (4.2 V → 2.8 V supply). |
Use Scenario: Clamping VBUS sense line in USB-C PD sink application to protect 3.3 V supervisor IC from transient overshoot. IC Role / Device Role / Timing Role: Fast-recovery Zener clamp absorbing 100 ns, 8 V surges on CC/VBUS detection path. Use Value: Limits sensed voltage to ≤3.3 V with <500 ps turn-on delay, preventing false disconnect events during hot-plug. |
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-C3V0,115 (Nexperia) | Same 3.0 V ±5 % spec, but rated at 300 mW Ptot and uses older BZX84 series process with higher rdiff (700 Ω) | Higher power margin suits higher-current biasing; less optimal for <100 µA systems due to increased leakage | Select when board layout allows larger thermal relief or when legacy BOM compatibility is required |
| MMSZ4683T1G (onsemi) | 3.0 V ±5 %, 500 mW rating, 300 Ω rdiff at 20 mA, but specified at 20 mA test current - less accurate at µA-level bias | Better regulation under load, but exhibits >5× higher IR at 3.0 V reverse bias, increasing standby drain | Prefer only if circuit draws ≥1 mA Zener current and thermal headroom exceeds 300 mW |
Compared with BZX8450-C3V0R, the BZX84-C3V0 offers higher power handling but reduced µA-level accuracy, while MMSZ4683T1G improves regulation under load at the expense of standby current - making BZX8450-C3V0R uniquely suited for sub-100 µA reference applications.
Availability
BZX8450-C3V0R is available at Aetrix Electronics and suitable for portable sensor biasing, MCU reset threshold generation, low-power comparator reference, and USB-C port voltage clamp applications requiring stable component supply with tight lead-time control and full traceability.
Supply support for BZX8450-C3V0R 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 and industrial-grade components.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for energy-constrained applications where µA-level bias stability, compact SOT23 packaging, and controlled leakage behavior are critical design requirements.
FAQ
What is the maximum reverse voltage that can be safely applied to BZX8450-C3V0R before breakdown?
The device is rated for nominal 3.0 V Zener voltage at IZ = 50 µA, with guaranteed breakdown occurring between 2.85 V and 3.15 V. Absolute maximum reverse voltage is not defined; instead, the limiting value is non-repetitive peak reverse power dissipation of 40 W for 100 µs pulses. Continuous reverse bias must stay within the 250 mW total power limit at ambient ≤25 °C.
Can BZX8450-C3V0R be used in forward-bias mode as a standard diode?
Yes - its forward voltage is specified at 0.9 V max at 10 mA, and it supports up to 200 mA forward current. However, it is not optimized for rectification: its VF is higher than Schottky diodes, and its reverse recovery time is not characterized. Use only for low-speed, low-current forward conduction where Zener functionality is secondary.
How does the "C" suffix in BZX8450-C3V0R affect its performance versus "B" variants?
The "C" denotes ±5 % voltage tolerance (vs. ±2 % for "B"), and incorporates intentional minor leakage current rise per AN90031 to improve switching speed and reduce noise. This makes C-series variants better suited for signal-path references and fast transient response, while B-series prioritizes tighter DC accuracy in static bias applications.
Is thermal derating required for BZX8450-C3V0R when operating above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C using the specified thermal resistance Rth(j-a) = 500 K/W. For example, at Tamb = 75 °C, maximum allowed Ptot drops to 125 mW. Derating follows Ptot(max) = 250 mW − [(Tamb − 25) × 0.5 mW/°C], assuming standard FR4 mounting per datasheet condition [2].
BZX8450-C3V0R 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 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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-C3V0R FAQ
1.How can I place an order for BZX8450-C3V0R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C3V0R 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-C3V0R reliable?
The price and inventory of BZX8450-C3V0R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C3V0R is usually 5 days.
3.What payment methods are accepted for BZX8450-C3V0R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V0R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C3V0R?
BZX8450-C3V0R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C3V0R 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-C3V0R?
For technical support, including BZX8450-C3V0R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V0R requirements.
6.How does Aetrix verify that BZX8450-C3V0R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C3V0R 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-C3V0R meets industry standards.
7.What is the process for return or replacement of BZX8450-C3V0R?
All BZX8450-C3V0R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V0R, 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-C3V0R part is unused and in its original packaging.
Return procedure for BZX8450-C3V0R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C3V0R 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
