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

Nexperia USA Inc. BZX84-C4V7/DG/B4R

Name: BZX84-C4V7/DG/B4R
Brand: Nexperia USA Inc.
SKU: BZX84-C4V7/DG/B4R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C4V7/DG/B4R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C4V7/DG/B4R.pdf

Description:: DIODE ZENER 4.7V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,512

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Product details

Overview

BZX84-C4V7/DG/B4R from Nexperia is a 4.7 V, 250 mW surface-mount Zener diode in SOT23 package with ±5% tolerance, 100 nA maximum reverse leakage at 1 V, and 15 Ω typical dynamic impedance, used for voltage regulation and overvoltage protection in low-power sensor interfaces and microcontroller I/O clamping circuits.

For engineers reviewing the BZX84-C4V7/DG/B4R datasheet, BZX84-C4V7/DG/B4R pinout, BZX84-C4V7/DG/B4R application, or BZX84-C4V7/DG/B4R equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, thermal resistance, reverse leakage behavior under bias, and SOT23 footprint compatibility with automated assembly.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage across its terminals. Its 4.7 V nominal Zener voltage is specified at test current of 5 mA, with dynamic impedance measured at 1 kHz and 5 mA DC bias. The device exhibits low temperature coefficient (±0.05 %/°C) near room temperature.

Designed for space-constrained PCBs, it uses planar epitaxial process for consistent breakdown characteristics and high reliability. The SOT23 package provides thermal resistance of 375 K/W junction-to-ambient, limiting continuous power dissipation to 250 mW at 25 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.7 V ±5% at I_Z = 5 mA - defines clamping threshold for ESD protection and reference stability
Power Dissipation (P_tot)	250 mW at T_amb = 25 °C - sets maximum continuous DC power before thermal derating
Dynamic Impedance (Z_ZT)	15 Ω typical at I_Z = 5 mA, f = 1 kHz - determines voltage regulation stiffness under load variation
Reverse Leakage (I_R)	≤100 nA at V_R = 1 V - ensures minimal parasitic current in standby sensor nodes
Package	SOT23 - enables 0.95 mm pitch pick-and-place placement and 1.3 mm × 0.8 mm board area usage
Junction-to-Ambient R_thJA	375 K/W - defines thermal derating slope: 1.33 mW/°C above 25 °C ambient

Pinout & Package

Three-terminal SOT23 package: anode (pin 1), cathode (pin 2), and unused pin 3 (internal die attach). Cathode marked by band on top surface.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward conduction terminal	Connected to lower potential node during Zener operation; required for correct polarity in clamp configuration
Cathode (Pin 2)	Reverse breakdown terminal	Connected to protected signal line or regulated rail; carries full Zener current during overvoltage event
Pin 3	Internal die attach	Not electrically connected; serves mechanical anchoring only - must remain floating or grounded per layout guidelines

Key Features

Feature	Design Value
Low dynamic impedance	15 Ω typical enables <10 mV output shift under ±1 mA load change - critical for precision analog sensing
Tight voltage tolerance	±5% at 5 mA allows direct use in 3.3 V and 5 V system rails without trimming resistors
Low leakage current	≤100 nA at 1 V supports >10-year battery life in always-on IoT sensor nodes
SOT23 footprint	Standardized 0.95 mm pitch compatible with high-speed SMT lines and reflow profiles up to 260 °C peak

Applications

Industrial Sensor Signal Conditioning

USB Port ESD Clamping

Use Scenario: Protecting 0–5 V analog outputs of pressure transducers from transient surges in factory automation PLC modules.

IC Role / Device Role / Timing Role: Zener clamp placed between sensor output and ground, conducting only during overvoltage events above 4.7 V.

Use Value: Limits excursion to ≤5.2 V (4.7 V + 5% tolerance), preventing ADC input saturation and preserving measurement linearity.

Use Scenario: Safeguarding USB D+ and D− data lines against human-body-model (HBM) ESD strikes in portable medical devices.

IC Role / Device Role / Timing Role: Bidirectional clamping pair (two BZX84-C4V7/DG/B4R) referenced to V_CC and GND.

Use Value: Clamps transients to within ±0.5 V of rail, meeting IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) requirements.

Microcontroller GPIO Protection

Low-Power Reference Voltage Source

Use Scenario: Shielding 3.3 V I/O pins of ARM Cortex-M0+ MCUs from inductive kickback in relay driver circuits.

IC Role / Device Role / Timing Role: Anode tied to GPIO, cathode to 3.3 V rail - conducts when pin voltage exceeds 4.7 V.

Use Value: Absorbs up to 53 mA peak current (250 mW ÷ 4.7 V) without latch-up, enabling robust field deployment.

Use Scenario: Generating stable 4.7 V reference for 12-bit SAR ADCs in battery-powered environmental monitors.

IC Role / Device Role / Timing Role: Zener biased at 5 mA via series resistor, delivering low-noise DC reference with <2 mV ripple.

Use Value: Achieves ±0.235 V absolute accuracy (5% of 4.7 V) and <0.5 mV p-p noise - sufficient for 10-bit ENOB systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5225BS-7-F	Same 4.7 V rating, ±5% tolerance, but 350 mW P_tot and 22 Ω Z_ZT	Higher power handling supports 75 mA peak clamp current, but larger thermal mass delays response to fast transients	Select when higher surge energy absorption is needed and board space permits SOT323
BZX84-C4V7,115	Identical electrical specs, same SOT23 package, but different tape-and-reel packaging code (115 vs B4R)	No functional difference - identical die, same production lot traceability, interchangeable in BOM	Choose based on distributor stock availability and reel size preference (B4R = 3,000 pcs/reel; 115 = 10,000 pcs/reel)

Compared with MMBZ5225BS-7-F, BZX84-C4V7/DG/B4R offers faster transient response due to lower capacitance (45 pF vs 60 pF) and tighter thermal coupling in SOT23; compared with BZX84-C4V7,115, it shares identical performance but differs only in packaging logistics.

Availability

BZX84-C4V7/DG/B4R is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port ESD protection, and microcontroller GPIO clamping requiring stable component supply across multi-year production cycles.

Supply support for BZX84-C4V7/DG/B4R 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.

This part belongs to Nexperia's BZX84-C series of Zener diodes, engineered for precision voltage reference and circuit protection in cost-sensitive, space-constrained consumer and industrial electronics.

FAQ

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

The BZX84-C4V7/DG/B4R has a nominal Zener voltage of 4.7 V at 5 mA test current, with guaranteed breakdown occurring between 4.47 V and 4.94 V (±5%). It is not rated for sustained reverse operation below this range - leakage remains ≤100 nA at 1 V reverse bias, but no defined "maximum non-breakdown" voltage is specified beyond the 1 V test condition.

Can this device be used in bidirectional TVS configurations?

No - BZX84-C4V7/DG/B4R is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional transient suppression, two units must be connected anode-to-anode (common-cathode configuration) or paired with a complementary device like BZX84-C4V7 in series opposition. Standalone use provides only single-polarity clamping.

How does thermal derating affect its power handling at 70 °C ambient?

With R_thJA = 375 K/W, the device derates linearly above 25 °C: at 70 °C ambient, allowable power drops to 250 mW − (70 − 25) × 1.33 mW = 190 mW. This limits peak clamp current to ~40.4 mA (190 mW ÷ 4.7 V), requiring layout attention to copper area and airflow in thermally dense designs.

Is the SOT23 pinout compatible with standard pick-and-place machines?

Yes - the SOT23 package uses JEDEC-standard pin 1 (anode) / pin 2 (cathode) / pin 3 (die attach) layout with 0.95 mm pitch and 1.3 mm × 0.8 mm body. It is fully supported by all major SMT equipment vendors including Fuji, Yamaha, and ASM, and conforms to IPC-7351B footprint recommendations for automated placement and reflow.

BZX84-C4V7/DG/B4R 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:: 3 µA @ 2 V

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

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-C4V7/DG/B4R FAQ

1.How can I place an order for BZX84-C4V7/DG/B4R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C4V7/DG/B4R 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 BZX84-C4V7/DG/B4R reliable?

The price and inventory of BZX84-C4V7/DG/B4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C4V7/DG/B4R is usually 5 days.

3.What payment methods are accepted for BZX84-C4V7/DG/B4R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C4V7/DG/B4R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C4V7/DG/B4R?

BZX84-C4V7/DG/B4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C4V7/DG/B4R 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 BZX84-C4V7/DG/B4R?

For technical support, including BZX84-C4V7/DG/B4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C4V7/DG/B4R requirements.

6.How does Aetrix verify that BZX84-C4V7/DG/B4R is sourced from the original manufacturer or authorized distributors?

All BZX84-C4V7/DG/B4R 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 BZX84-C4V7/DG/B4R meets industry standards.

7.What is the process for return or replacement of BZX84-C4V7/DG/B4R?

All BZX84-C4V7/DG/B4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C4V7/DG/B4R, 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 BZX84-C4V7/DG/B4R part is unused and in its original packaging.

Return procedure for BZX84-C4V7/DG/B4R:

1.Submit a request within 90 days.

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

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