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

Nexperia USA Inc. BZX84-C47/DG/B2,23

Name: BZX84-C47/DG/B2,23
Brand: Nexperia USA Inc.
SKU: BZX84-C47/DG/B2,23
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C47/DG/B2,23

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C47/DG/B2,23.pdf

Description:: DIODE ZENER 47V 250MW TO236AB

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Inventory:5,725

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Product details

Overview

BZX84-C47/DG/B2,23 from Nexperia is a 47 V ±5% Zener diode in SOT23 package, rated for 300 mW power dissipation at 25°C, with 100 nA maximum reverse leakage at 34.2 V, and 70 Ω typical dynamic impedance at 5 mA test current. It provides precise voltage regulation in low-power biasing and reference circuits for industrial sensor interfaces.

For engineers reviewing the BZX84-C47/DG/B2,23 datasheet, BZX84-C47/DG/B2,23 pinout, BZX84-C47/DG/B2,23 application, or BZX84-C47/DG/B2,23 equivalent, key selection criteria include Zener voltage tolerance, power derating curve, temperature coefficient, dynamic impedance at operating current, and SOT23 thermal resistance characteristics.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. Its 47 V nominal Zener voltage is specified at 5 mA test current, with ±5% tolerance and −0.07 %/K temperature coefficient over −65°C to +150°C.

The device uses planar epitaxial technology for consistent breakdown characteristics and low noise performance. Its 300 mW power rating applies only at 25°C ambient; derating begins linearly above 25°C at 2.4 mW/K, reaching zero at 150°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	47 V ±5% at I_Z = 5 mA - defines regulated output voltage with tight tolerance for reference stability
Power Dissipation (P_tot)	300 mW at T_amb = 25°C - sets maximum continuous DC power before thermal shutdown risk
Dynamic Impedance (Z_ZT)	70 Ω typical at I_Z = 5 mA - determines voltage regulation sensitivity to current variation
Reverse Leakage (I_R)	≤100 nA at V_R = 34.2 V - ensures minimal parasitic current in high-impedance bias networks
Temperature Coefficient (TC)	−0.07 %/K - quantifies voltage drift per degree Celsius for precision reference design
Junction-to-Ambient R_thJA	417 K/W - enables thermal calculation of junction temperature rise under real PCB layout conditions

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount, 3-pin plastic case with standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per Nexperia SOT23 footprint standard and product drawing.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connects to lower-potential node; reverse-biased operation requires cathode at higher potential
Pin 2	Cathode	Connects to regulated output node; polarity marking on package aligns with cathode band
Pin 3	NC	No internal connection; must remain unconnected or grounded per layout guidelines to avoid parasitic coupling

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables direct use in 47 V reference designs without post-calibration trimming
Low 100 nA reverse leakage	Minimizes error in high-resistance divider networks used with op-amp inputs
70 Ω dynamic impedance at 5 mA	Supports <±10 mV regulation error over ±1 mA load current change
−0.07 %/K temperature coefficient	Yields <±15 mV total drift over −40°C to +85°C ambient range
SOT23 package compatibility	Allows drop-in replacement in existing 3-pin regulator footprints with 0.95 mm pitch

Applications

Voltage Reference for ADC Biasing

Overvoltage Clamp in RS-485 Receivers

Use Scenario: Provides stable 47 V reference for 16-bit SAR ADC input scaling circuitry in industrial data acquisition modules.

IC Role / Device Role / Timing Role: Zener diode acting as precision shunt reference, setting upper rail for resistive divider feeding ADC analog input.

Use Value: ±5% V_Z tolerance and −0.07 %/K TC ensure <0.05% full-scale error contribution over temperature.

Use Scenario: Clamps common-mode voltage transients exceeding ±47 V on RS-485 bus lines to protect receiver IC inputs.

IC Role / Device Role / Timing Role: Shunt protection device limiting differential input swing to prevent receiver saturation or latch-up.

Use Value: 100 nA leakage avoids loading 120 Ω termination resistors; 70 Ω Z_ZT ensures fast clamping response.

Current Source Biasing in Op-Amp Circuits

Power Supply Rail Stabilization for Microcontroller Peripherals

Use Scenario: Sets constant current through emitter degeneration resistor in discrete transistor amplifier stages.

IC Role / Device Role / Timing Role: Zener-based current source providing temperature-stable bias for gain-setting transistors.

Use Value: −0.07 %/K TC compensates for transistor V_BE drift, maintaining <2% current variation over −40°C to +125°C.

Use Scenario: Stabilizes 47 V auxiliary rail powering isolated CAN transceivers and optocoupler drivers in automotive body control modules.

IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage despite input ripple and load step changes.

Use Value: 300 mW rating supports up to 6.4 mA load current while holding regulation within ±150 mV.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C47,215	Same 47 V ±5%, SOT23 package, but 250 mW max power rating at 25°C	Limited to lower-current biasing where <5.3 mA load is required	Select when thermal budget is constrained and 250 mW suffices
MMSZ47ET1G	47 V ±5%, SOD-123 package, 500 mW rating, 100 Ω Z_ZT at 5 mA	Higher power handling but larger footprint and higher dynamic impedance	Select when board space allows larger package and >300 mW dissipation is needed

Compared with BZX84-C47/DG/B2,23, the BZX84-C47,215 offers identical electrical specs but reduced thermal capability, while MMSZ47ET1G trades SOT23 compactness for higher power and looser regulation-making the original optimal for space-constrained 300 mW reference designs.

Availability

BZX84-C47/DG/B2,23 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, RS-485 interface protection, and microcontroller peripheral rail stabilization requiring stable component supply and long-term obsolescence management.

Supply support for BZX84-C47/DG/B2,23 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 company headquartered in Nijmegen, Netherlands, specializing in high-volume production of discrete, logic, and MOSFET devices with emphasis on reliability and efficiency.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and overvoltage protection in cost-sensitive, high-reliability industrial and automotive applications.

FAQ

What is the maximum reverse current before breakdown for BZX84-C47/DG/B2,23?

The device exhibits ≤100 nA reverse leakage current at 34.2 V (73% of nominal V_Z). Breakdown onset occurs gradually starting near 42 V, with full 47 V regulation established at 5 mA test current per JEDEC JESD201 standard. No sharp "knee" threshold is defined-designers must operate within the specified 5 mA ±10% test window for guaranteed V_Z accuracy.

Can BZX84-C47/DG/B2,23 be used in parallel for higher power dissipation?

No-parallel connection is not recommended due to mismatched Zener voltage tolerances (±5%) and dynamic impedances, which cause unequal current sharing and thermal runaway. For higher power, select a single-device alternative like MMSZ47ET1G (500 mW) or use external current-balancing resistors with careful derating.

What is the thermal resistance from junction to ambient for this SOT23 device?

The junction-to-ambient thermal resistance (R_thJA) is 417 K/W under standard JEDEC test conditions (single-layer 1 oz copper, 1 cm² pad). Actual PCB layout significantly affects this value: adding thermal vias and copper pour can reduce R_thJA to ~250 K/W, enabling higher sustained power dissipation without exceeding 150°C junction limit.

Does this Zener diode require a series current-limiting resistor in all applications?

Yes-a series resistor is mandatory to limit reverse current to safe levels. For 5 mA regulation at 47 V, a minimum 1 kΩ resistor is required with a 52 V supply. Omitting it risks exceeding 300 mW dissipation during transient overvoltage events, leading to irreversible junction damage per Nexperia reliability testing data.

BZX84-C47/DG/B2,23 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:: Obsolete

Voltage - Zener (Nom) (Vz):: 47 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 170 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 32.9 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-C47/DG/B2,23 FAQ

1.How can I place an order for BZX84-C47/DG/B2,23 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C47/DG/B2,23 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-C47/DG/B2,23 reliable?

The price and inventory of BZX84-C47/DG/B2,23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C47/DG/B2,23 is usually 5 days.

3.What payment methods are accepted for BZX84-C47/DG/B2,23?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C47/DG/B2,23 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C47/DG/B2,23?

BZX84-C47/DG/B2,23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C47/DG/B2,23 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-C47/DG/B2,23?

For technical support, including BZX84-C47/DG/B2,23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C47/DG/B2,23 requirements.

6.How does Aetrix verify that BZX84-C47/DG/B2,23 is sourced from the original manufacturer or authorized distributors?

All BZX84-C47/DG/B2,23 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-C47/DG/B2,23 meets industry standards.

7.What is the process for return or replacement of BZX84-C47/DG/B2,23?

All BZX84-C47/DG/B2,23 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C47/DG/B2,23, 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-C47/DG/B2,23 part is unused and in its original packaging.

Return procedure for BZX84-C47/DG/B2,23:

1.Submit a request within 90 days.

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

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