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

Nexperia USA Inc. BZX8450-C5V6-QR

Name: BZX8450-C5V6-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-C5V6-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C5V6-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C5V6-QR.pdf

Description:: DIODE ZENER 5.6V 250MW TO236AB

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Inventory:2,170

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Product details

Overview

BZX8450-C5V6-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 5.6 V nominal regulation at 50 µA test current, with ±5 % tolerance, 400 Ω differential resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.

For engineers reviewing the BZX8450-C5V6-QR datasheet, BZX8450-C5V6-QR pinout, BZX8450-C5V6-QR application, or BZX8450-C5V6-QR equivalent, this page provides verified electrical parameters, thermal behavior, automotive-grade reliability data, and real-world use context for low-power voltage stabilization circuits.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 5.32 V to 5.88 V at I_Z = 50 µA. Its temperature coefficient is −2.0 mV/K, enabling stable regulation across −55 °C to +150 °C ambient range, and it exhibits 120 pF capacitance at 0 V reverse bias and 1 MHz.

The device features intentional leakage optimization per AN90031 for fast switching and noise reduction, and its 250 mW total power dissipation is rated on FR4 PCB with single-sided 70 μm copper. Junction-to-ambient thermal resistance is 500 K/W in free air.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	5.6 V (min 5.32 V / max 5.88 V at I_Z = 50 µA; defines stable reference point for low-bias circuits)
Tolerance	±5 % (C-series grade; enables cost-effective selection where tighter regulation is not required)
Differential Resistance	400 Ω (at I_Z = 5 mA; determines output impedance and load regulation sensitivity)
Forward Voltage	0.9 V (at I_F = 10 mA; defines conduction threshold in forward bias protection paths)
Power Dissipation	250 mW (T_amb ≤ 25 °C on standard FR4; sets maximum continuous DC or pulsed power handling)
Junction Temperature	150 °C (absolute max; constrains thermal design margin in enclosed automotive modules)
Reverse Current	2.0 µA (max at V_R = 4.0 V; ensures minimal quiescent drain in battery-critical systems)

Pinout & Package

Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive use.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener regulation configuration
2	Not Connected (n.c.)	Internally unconnected; must remain floating-no PCB trace or solder joint permitted
3	Cathode (K)	Reverse-biased terminal; ties to regulated output node and current-limiting resistor

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA-enables stable regulation in microamp-level bias networks for IoT sensors and sleep-mode circuits
AEC-Q101 qualification	Validated for automotive under-hood environments including thermal cycling, humidity, and mechanical shock
Optimized leakage profile	Intentional minor rise in leakage per AN90031 improves transient response and reduces high-frequency noise in feedback loops
SOT23 footprint compatibility	Standard 3-pin SOT23 layout supports automated placement and reflow without redesign of existing PCB land patterns

Applications

Automotive Sensor Biasing

Portable Device Voltage Reference

Use Scenario: Providing stable 5.6 V reference for analog front-end circuitry in engine control unit (ECU) temperature and pressure sensors.

IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to clamp and stabilize sensor supply rail.

Use Value: Maintains <±1 % output deviation over −40 °C to +125 °C ambient due to −2.0 mV/K tempco and AEC-Q101 thermal robustness.

Use Scenario: Generating precise bias voltage for low-power op-amps and ADCs in wearable health monitors powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Low-current Zener regulator supplying reference voltage while drawing only 50 µA quiescent current.

Use Value: Enables >10-year battery life by limiting standby current to sub-µA levels when paired with high-impedance divider networks.

Industrial PLC Input Protection

USB-C Power Negotiation Clamp

Use Scenario: Clamping transient overvoltage on 24 V digital input channels of programmable logic controllers during field wiring surges.

IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing short-duration spikes up to 40 W non-repetitive peak power.

Use Value: Survives 100 µs surge pulses per IEC 61000-4-5 with no degradation, thanks to 40 W P_ZSM rating and 330 K/W junction-to-solder-point thermal resistance.

Use Scenario: Stabilizing CC line voltage during USB-C power delivery negotiation between host and peripheral devices.

IC Role / Device Role / Timing Role: Precision 5.6 V shunt regulator maintaining PD communication window within ±5 % tolerance during dynamic load changes.

Use Value: Ensures reliable PD handshake by holding CC line within 5.32–5.88 V range even with 2 µA to 5 mA load variation, supported by 400 Ω r_diff.

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-C5V6,115 (Nexperia)	Same 5.6 V / ±5 % spec but lacks AEC-Q101 qualification and optimized leakage profile; 250 mW rating on larger footprint	Restricted to commercial-grade industrial controls-not suitable for automotive ECU or ADAS modules	Select when AEC-Q101 compliance is unnecessary and cost is primary driver
MMSZ5232B-TP (Micro Commercial Components)	5.6 V / ±5 %, SOD-123 package, 500 mW rating, higher r_diff (600 Ω), no automotive qualification	Higher power handling but larger footprint and inferior thermal resistance (600 K/W); unsuitable for space-constrained automotive PCBs	Choose only if board area allows SOD-123 and thermal derating margins exceed 2×

Compared with BZX84-C5V6,115 and MMSZ5232B-TP, the BZX8450-C5V6-QR uniquely combines AEC-Q101 qualification, SOT23 miniaturization, and leakage-optimized switching behavior-making it the sole choice for automotive-grade, low-quiescent-current Zener references in compact layouts.

Availability

BZX8450-C5V6-QR is available at Aetrix Electronics and suitable for automotive sensor biasing, portable device voltage reference, and industrial PLC input protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX8450-C5V6-QR 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 leading global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with core expertise in automotive-qualified components and energy-efficient solutions.

The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in harsh-environment automotive and portable electronics where size, leakage, and thermal stability are critical.

FAQ

What is the maximum reverse voltage the BZX8450-C5V6-QR can withstand before breakdown?

The BZX8450-C5V6-QR has a nominal Zener voltage of 5.6 V, with guaranteed breakdown occurring between 5.32 V and 5.88 V at 50 µA test current. Its absolute maximum reverse voltage is not defined separately-it is characterized only within its specified Zener operating region. Exceeding 5.88 V continuously risks thermal runaway unless current is strictly limited by external series resistance.

Does the 'QR' suffix indicate tape-and-reel packaging or a specific revision?

The 'QR' suffix denotes Nexperia's standard tape-and-reel packaging for SOT23 devices: 3,000 units per reel, compliant with EIA-481-D standards, with moisture sensitivity level (MSL) 1 and dry pack labeling. It does not indicate a revision-the latest revision is Rev. 3 (July 2024), applicable to all BZX8450-Q series part numbers regardless of reel suffix.

Can BZX8450-C5V6-QR replace BZX84-C5V6 in an existing design?

Yes, with caveats: both share identical electrical specs (5.6 V, ±5 %, 250 mW), but BZX8450-C5V6-QR adds AEC-Q101 qualification and optimized leakage per AN90031. The SOT23 footprints are identical, but verify that the PCB land pattern matches Nexperia's recommended reflow footprint (Fig. 10) and that thermal relief design accommodates 500 K/W R_th(j-a).

Why does the datasheet list Pin 2 as 'n.c.' and what happens if it's grounded?

Pin 2 is internally unconnected-no bond wire or die attachment exists. Grounding or routing to any net creates a parasitic path that may induce leakage, shift Zener voltage, or cause premature failure. The datasheet explicitly requires Pin 2 to remain floating; solder mask must fully cover it, and no copper trace may contact the pad.

BZX8450-C5V6-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX8450-Q

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 4 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -55°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C5V6-QR FAQ

1.How can I place an order for BZX8450-C5V6-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C5V6-QR 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-C5V6-QR reliable?

The price and inventory of BZX8450-C5V6-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C5V6-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-C5V6-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C5V6-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C5V6-QR?

BZX8450-C5V6-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C5V6-QR 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-C5V6-QR?

For technical support, including BZX8450-C5V6-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C5V6-QR requirements.

6.How does Aetrix verify that BZX8450-C5V6-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-C5V6-QR 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-C5V6-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-C5V6-QR?

All BZX8450-C5V6-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C5V6-QR, 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-C5V6-QR part is unused and in its original packaging.

Return procedure for BZX8450-C5V6-QR:

1.Submit a request within 90 days.

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

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