Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX8450-C4V7R

Name: BZX8450-C4V7R
Brand: Nexperia USA Inc.
SKU: BZX8450-C4V7R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX8450-C4V7R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX8450-C4V7R.pdf

Description:: DIODE ZENER 4.7V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:653

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZX8450-C4V7R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, providing precise 4.7 V ±5 % regulation at 50 μA test current, with 250 mW total power dissipation and 140 pF capacitance at 0 V - used for biasing, reference, and low-power voltage stabilization in portable battery-powered circuits.

For engineers reviewing the BZX8450-C4V7R datasheet, BZX8450-C4V7R pinout, BZX8450-C4V7R application, or BZX8450-C4V7R equivalent, key selection criteria include Zener voltage tolerance (±5 %), low test current operation (50 μA), differential resistance (80 Ω at 5 mA), thermal resistance (330 K/W to solder point), and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode-anode terminals when reverse current exceeds the knee threshold. Its specified 4.7 V nominal Zener voltage is guaranteed under 50 μA test current, enabling ultra-low quiescent current design.

The BZX8450-C4V7R exhibits a temperature coefficient of −2.7 mV/K and differential resistance of 80 Ω at 5 mA, supporting predictable voltage drift and minimal dynamic impedance in precision reference paths. Its intentional leakage optimization (per AN90031) reduces noise and improves switching response in signal conditioning stages.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	4.47 V to 4.94 V (±5 % tolerance at I_Z = 50 μA); ensures stable reference within tight margin for low-power analog sensing
Differential Resistance r_diff	80 Ω (at I_Z = 5 mA); limits output voltage variation under load changes in feedback networks
Forward Voltage V_F	≤ 0.9 V (at I_F = 10 mA); enables use as low-drop clamp or protection diode in dual-role circuits
Total Power Dissipation P_tot	250 mW (T_amb ≤ 25 °C on FR4 PCB); defines maximum continuous power handling without derating
Diode Capacitance C_d	140 pF (f = 1 MHz, V_R = 0 V); impacts high-frequency noise coupling and stability in RF-adjacent references
Reverse Current I_R	≤ 3.0 μA (at V_R = 4.0 V); confirms low leakage for battery-critical standby modes
Thermal Resistance R_th(j-sp)	330 K/W (to cathode solder point); determines junction-to-PCB thermal path efficiency for reliability in compact layouts

Pinout & 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 thermal performance on standard FR4 PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward current entry point; connected to lower-potential node in shunt regulation configuration
2	Not Connected (n.c.)	Internally unconnected terminal; must remain floating - no PCB trace or via allowed
3	Cathode (K)	Zener voltage reference node; tied to regulated output and current-limiting resistor in standard topology

Key Features

Feature	Design Value
Low test current operation	Specified at 50 μA - enables direct battery-sourced reference without burdening energy-limited systems
Optimized leakage profile	Intentional minor rise per AN90031 - reduces broadband noise and improves transient response in sensor front-ends
Tight voltage tolerance	±5 % (C-series) - supports accurate calibration in portable instrumentation without trimming
Small-footprint SOT23	2.9 mm × 1.3 mm body - fits high-density layouts where space constraints prohibit larger Zener packages
Controlled temperature coefficient	−2.7 mV/K - enables predictable drift compensation in temperature-stable reference designs

Applications

Portable Sensor Biasing

Microcontroller Reset Reference

Use Scenario: Providing stable 4.7 V bias to MEMS pressure sensor amplifier in wearable health monitor.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed common-mode level for analog front-end.

Use Value: Low 50 μA test current minimizes battery drain during multi-day continuous monitoring cycles.

Use Scenario: Generating reset threshold for ultra-low-power MCU in smart meter sleep mode.

IC Role / Device Role / Timing Role: Precision Zener defining brown-out detection voltage for POR circuitry.

Use Value: ±5 % tolerance ensures deterministic reset activation across temperature and supply variations.

USB-Powered Signal Conditioning

IoT Node Voltage Clamping

Use Scenario: Stabilizing op-amp reference rail in USB-powered environmental data logger.

IC Role / Device Role / Timing Role: Low-noise shunt regulator supplying clean 4.7 V to ADC reference input.

Use Value: 140 pF capacitance and optimized leakage reduce high-frequency interference on sensitive analog rails.

Use Scenario: Protecting GPIO input of BLE SoC against overvoltage in industrial sensor node.

IC Role / Device Role / Timing Role: Bidirectional clamp (forward + Zener) limiting input to safe 4.7 V/0.9 V envelope.

Use Value: Dual-mode conduction (Zener + forward) provides symmetric transient suppression without external diodes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5225BS-7-F	4.7 V ±5 %, 225 mW, SOT23, but rated at 20 mA test current - higher dynamic impedance (17 Ω vs 80 Ω)	Higher power handling suits higher-current references; less suitable for sub-100 μA biasing	Select when >1 mA regulation current is available and lower r_diff is prioritized over ultra-low I_Z
BZX84-C4V7,115	Same 4.7 V ±5 %, same SOT23, but older revision - lacks intentional leakage optimization (AN90031) and has 150 pF capacitance	Higher noise floor and slower settling in fast-switching analog paths	Prefer BZX8450-C4V7R for new designs requiring reduced noise and improved transient response

Compared with MMBZ5225BS-7-F and BZX84-C4V7,115, the BZX8450-C4V7R uniquely balances ultra-low test current (50 μA), controlled leakage behavior, and 140 pF capacitance - making it optimal for battery-sensitive, noise-critical reference applications where both static accuracy and dynamic fidelity matter.

Availability

BZX8450-C4V7R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and USB-powered signal conditioning requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZX8450-C4V7R 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 logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with rigorous quality standards.

The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, designed specifically for battery-powered and space-constrained applications demanding stable voltage references at microampere-level operating currents.

FAQ

What is the maximum reverse voltage this diode can withstand before breakdown?

The BZX8450-C4V7R is rated for nominal Zener voltage of 4.7 V (4.47–4.94 V range) at 50 μA test current. Its absolute maximum reverse voltage is not defined independently - breakdown occurs predictably within specification at V_Z, and operation beyond 4.94 V risks exceeding power limits or thermal runaway. Non-repetitive peak reverse power is 40 W for 100 µs pulses.

Can Pin 2 be grounded or left unconnected on the PCB?

Pin 2 is explicitly marked "not connected" (n.c.) in the official Nexperia pinning diagram and must remain electrically floating - no connection to ground, power, or any other net. Soldering or routing to Pin 2 violates the internal construction and may cause parametric shift or premature failure.

How does the −2.7 mV/K temperature coefficient affect long-term stability?

A −2.7 mV/K coefficient means the Zener voltage decreases by 2.7 mV per Kelvin rise in junction temperature. Over a 50 °C ambient range (25–75 °C), this yields ~135 mV drift - acceptable for non-precision references but requires compensation in high-accuracy systems. The value is measured and specified per Table 8.

Is this part suitable for automotive applications?

No - the BZX8450-C4V7R is not automotive-qualified. Nexperia's legal disclaimers explicitly state that non-automotive qualified products are unsuitable for safety-critical or life-support systems. It lacks AEC-Q200 stress testing, extended temperature validation, and automotive-grade traceability required for vehicle use.

BZX8450-C4V7R 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):: 4.7 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 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-C4V7R FAQ

1.How can I place an order for BZX8450-C4V7R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C4V7R 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-C4V7R reliable?

The price and inventory of BZX8450-C4V7R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C4V7R is usually 5 days.

3.What payment methods are accepted for BZX8450-C4V7R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C4V7R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C4V7R?

BZX8450-C4V7R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C4V7R 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-C4V7R?

For technical support, including BZX8450-C4V7R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C4V7R requirements.

6.How does Aetrix verify that BZX8450-C4V7R is sourced from the original manufacturer or authorized distributors?

All BZX8450-C4V7R 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-C4V7R meets industry standards.

7.What is the process for return or replacement of BZX8450-C4V7R?

All BZX8450-C4V7R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C4V7R, 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-C4V7R part is unused and in its original packaging.

Return procedure for BZX8450-C4V7R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…