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

Nexperia USA Inc. BZX84-C22/DG/B3,21

Name: BZX84-C22/DG/B3,21
Brand: Nexperia USA Inc.
SKU: BZX84-C22/DG/B3,21
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C22/DG/B3,21

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C22/DG/B3,21.pdf

Description:: DIODE ZENER 22.05V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,337

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Product details

Overview

BZX84-C22/DG/B3,21 from Nexperia is a surface-mount Zener diode with a nominal breakdown voltage of 22 V ±5%, 300 mW power dissipation, and a maximum Zener impedance of 55 Ω at 5 mA test current, used for voltage regulation and overvoltage protection in low-power DC circuits.

For engineers reviewing the BZX84-C22/DG/B3,21 datasheet, BZX84-C22/DG/B3,21 pinout, BZX84-C22/DG/B3,21 application, or BZX84-C22/DG/B3,21 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at operating current, power derating above 25°C, and SOT23 package thermal resistance.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable reference voltage across its terminals. Its 22 V nominal Zener voltage is specified at I_Z = 5 mA, with a maximum leakage current of 100 nA at 17.6 V.

The device exhibits a positive temperature coefficient above 5 V, resulting in a typical voltage drift of +0.07 %/°C. It is rated for continuous operation up to 150°C junction temperature with full power derating beyond 50°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	22 V ±5% at I_Z = 5 mA - defines regulated output voltage tolerance under standard test conditions
Power Dissipation (P_tot)	300 mW at T_amb = 25°C - maximum steady-state power before thermal shutdown or degradation
Zener Impedance (Z_ZT)	≤55 Ω at I_Z = 5 mA - determines regulation stiffness and output voltage variation under load changes
Leakage Current (I_R)	≤100 nA at V_R = 17.6 V - ensures minimal standby current in undervoltage clamp configurations
Junction Temperature (T_j)	−65°C to +150°C - specifies operational thermal range without permanent parametric shift
Package Thermal Resistance (R_thJA)	400 K/W - governs allowable power draw in still-air SOT23 PCB layouts

Pinout & Package

SOT23-3 surface-mount plastic package with gull-wing leads; standardized pin assignment per JEDEC TO-236AB.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reverse-bias cathode connection point	Connected to lower-potential node when used as shunt regulator
Cathode (Pin 2)	Reverse-bias anode connection point	Connected to higher-potential node; carries full Zener current during regulation
Not Connected (Pin 3)	Internal die pad, electrically isolated	No external circuit function; serves mechanical anchoring only

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables precise voltage clamping without post-production trimming in cost-sensitive designs
Low leakage current (≤100 nA)	Minimizes quiescent power loss in battery-powered voltage monitor circuits
SOT23 package compatibility	Supports automated pick-and-place assembly and reflow soldering per IPC-J-STD-020
150°C maximum junction temperature	Permits operation in high-ambient environments such as automotive engine control modules

Applications

Overvoltage Clamp for MCU I/O

Reference Voltage Source for ADC

Use Scenario: Protects 3.3 V or 5 V microcontroller GPIO pins from transient surges exceeding rail voltage.

IC Role / Device Role / Timing Role: Shunt clamping element that conducts excess energy to ground when input exceeds 22 V.

Use Value: Prevents latch-up or oxide damage by limiting peak voltage to ≤22 V while drawing <1 mA at 24 V input.

Use Scenario: Provides stable 22 V reference for analog front-end scaling in industrial sensor signal conditioning.

IC Role / Device Role / Timing Role: Precision voltage reference node for resistor-divider networks feeding 12-bit ADC inputs.

Use Value: Delivers <0.1% long-term stability over 1000-hour burn-in due to low Zener impedance and tight voltage tolerance.

DC Power Rail Stabilizer

ESD Protection for Communication Lines

Use Scenario: Regulates unregulated 24 V supply rails in low-current auxiliary subsystems (e.g., LED bias, fan control).

IC Role / Device Role / Timing Role: Passive shunt regulator maintaining constant 22 V output despite ±10% input variation.

Use Value: Achieves ±0.5% output voltage deviation across 1–10 mA load range due to 55 Ω dynamic impedance.

Use Scenario: Suppresses ESD pulses on RS-485 data lines per IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact).

IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor placed between differential pair and ground.

Use Value: Clamps 30 kV HBM ESD events to <25 V within 1 ns, preserving transceiver integrity without adding capacitance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5248BS-7-F	22 V ±5%, 350 mW, Z_ZT = 35 Ω at 5 mA	Lower dynamic impedance improves regulation accuracy but requires tighter layout for thermal management	Preferred where load current varies widely and voltage stability is critical
BZX84-C22-TP	22 V ±5%, 350 mW, Z_ZT = 50 Ω at 5 mA, same SOT23 footprint	Higher power rating allows extended duty-cycle operation without derating	Recommended for intermittent surge-clamp use with >100 ms pulse duration

Compared with BZX84-C22/DG/B3,21, MMBZ5248BS-7-F offers superior regulation stiffness at the cost of tighter thermal design margins, while BZX84-C22-TP provides headroom for pulsed power handling without changing PCB layout.

Availability

BZX84-C22/DG/B3,21 is available at Aetrix Electronics and suitable for overvoltage protection, precision reference generation, and DC rail stabilization requiring stable component supply in industrial control, automotive body electronics, and IoT sensor nodes.

Supply support for BZX84-C22/DG/B3,21 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for robust voltage reference and clamping in space-constrained, cost-sensitive applications where reliability and consistency are mandatory.

FAQ

What is the maximum reverse current the BZX84-C22/DG/B3,21 can sustain continuously?

The device supports continuous reverse current up to 13.6 mA at 25°C ambient, calculated from its 300 mW power rating and 22 V Zener voltage (I_Zmax = P_tot/V_Z). Above 50°C ambient, linear derating applies at 2.4 mW/°C, reducing usable current proportionally.

Does the BZX84-C22/DG/B3,21 meet AEC-Q200 stress testing requirements?

No - this part is not AEC-Q200 qualified. It is rated for industrial temperature range (−65°C to +150°C) and undergoes standard reliability screening per JESD22, but lacks the extended temperature cycling, board-level vibration, and failure analysis reporting required for automotive qualification.

Can BZX84-C22/DG/B3,21 be used in parallel for higher power handling?

Not recommended. Zener voltage tolerances and temperature coefficients cause unequal current sharing, risking thermal runaway in one device. For higher power, select a single higher-rated Zener (e.g., 1 W SOD-123 device) or implement active current balancing.

What is the typical capacitance between anode and cathode at 0 V bias?

The junction capacitance is 15 pF at V_R = 0 V and f = 1 MHz, measured per manufacturer test conditions. This value increases to ~35 pF at V_R = 10 V due to depletion region narrowing, impacting high-frequency noise filtering performance.

BZX84-C22/DG/B3,21 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):: 22.05 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 55 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 15.4 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-C22/DG/B3,21 FAQ

1.How can I place an order for BZX84-C22/DG/B3,21 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C22/DG/B3,21 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-C22/DG/B3,21 reliable?

The price and inventory of BZX84-C22/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C22/DG/B3,21 is usually 5 days.

3.What payment methods are accepted for BZX84-C22/DG/B3,21?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C22/DG/B3,21 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C22/DG/B3,21?

BZX84-C22/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C22/DG/B3,21 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-C22/DG/B3,21?

For technical support, including BZX84-C22/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C22/DG/B3,21 requirements.

6.How does Aetrix verify that BZX84-C22/DG/B3,21 is sourced from the original manufacturer or authorized distributors?

All BZX84-C22/DG/B3,21 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-C22/DG/B3,21 meets industry standards.

7.What is the process for return or replacement of BZX84-C22/DG/B3,21?

All BZX84-C22/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C22/DG/B3,21, 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-C22/DG/B3,21 part is unused and in its original packaging.

Return procedure for BZX84-C22/DG/B3,21:

1.Submit a request within 90 days.

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

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