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. BZX84-C22/DG/B4R

Name: BZX84-C22/DG/B4R
Brand: Nexperia USA Inc.
SKU: BZX84-C22/DG/B4R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX84-C22/DG/B4R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C22/DG/B4R.pdf

Description:: DIODE ZENER 22.05V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,895

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

Product details

Overview

BZX84-C22/DG/B4R from Nexperia is a surface-mount Zener diode with a nominal breakdown voltage of 22 V ±5%, 350 mW power dissipation, and 100 nA maximum reverse leakage at 17 V, used for voltage regulation and overvoltage protection in low-power analog circuits and microcontroller I/O clamping.

For engineers reviewing the BZX84-C22/DG/B4R datasheet, BZX84-C22/DG/B4R pinout, BZX84-C22/DG/B4R application, or BZX84-C22/DG/B4R equivalent, key selection criteria include Zener tolerance, thermal resistance (570 K/W), dynamic impedance (55 Ω at 5 mA), and SOT-23 package compatibility with automated PCB assembly.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 22 V nominal Zener voltage is specified at test current of 5 mA, with dynamic impedance of 55 Ω ensuring minimal output variation across operating current range.

The device features a maximum junction-to-ambient thermal resistance of 570 K/W in standard SOT-23 mounting, limiting continuous power handling to 350 mW at 25 °C ambient, and exhibits 100 nA reverse leakage at 17 V to minimize standby current draw in battery-powered systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	22 V ±5% at 5 mA - provides precise voltage reference for analog sensing and supply rail clamping
Power Dissipation (P_tot)	350 mW - limits usable current to ~15.9 mA at 22 V without heatsinking
Dynamic Impedance (Z_ZT)	55 Ω at 5 mA - determines output voltage stability under load transients
Reverse Leakage (I_R)	100 nA max at 17 V - ensures negligible quiescent current in low-power sleep modes
Junction-to-Ambient R_thJA	570 K/W - defines thermal derating slope: 1.23 mW/°C above 25 °C ambient
Package	SOT-23 - enables high-density placement and reflow-compatible assembly on compact PCBs

Pinout & Package

SOT-23 plastic surface-mount package with cathode-marked lead identification; standardized three-terminal configuration for unidirectional voltage regulation.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward conduction terminal	Connected to lower potential node during Zener operation; carries reverse current when cathode is biased positive
Cathode (Pin 2)	Zener breakdown terminal	Connected to regulated voltage node; marked by band on package body
NC / Not Connected (Pin 3)	Unused internal connection	No electrical function; isolated die pad for mechanical anchoring only

Key Features

Feature	Design Value
Tight Zener voltage tolerance	±5% at 5 mA - reduces calibration overhead in precision reference designs
Low dynamic impedance	55 Ω - maintains <±0.1 V output shift across 1–10 mA load range
Ultra-low reverse leakage	100 nA at 17 V - preserves battery life in always-on sensor nodes
SOT-23 footprint compatibility	Standard JEDEC MO-215 - supports pick-and-place automation and IPC-7351B land patterns

Applications

Microcontroller I/O Protection

ADC Reference Stabilization

Use Scenario: Clamping 3.3 V or 5 V MCU GPIO pins against ESD and transient overvoltage.

IC Role / Device Role / Timing Role: Zener diode acting as bidirectional shunt clamp between I/O line and ground.

Use Value: Limits pin voltage to ≤22 V while drawing <1 µA leakage, preventing latch-up and damage.

Use Scenario: Providing stable bias voltage for analog front-end signal conditioning before ADC sampling.

IC Role / Device Role / Timing Role: Passive voltage reference source for op-amp biasing or sensor excitation.

Use Value: Delivers 22 V reference with <0.5% drift over 0–70 °C, enabling 12-bit measurement accuracy.

Low-Power Sensor Supply Rail

Industrial Signal Conditioning

Use Scenario: Regulating auxiliary 22 V supply for piezoelectric transducers or MEMS oscillators.

IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage under variable load current up to 10 mA.

Use Value: Achieves ±0.3 V regulation error across 2–8 mA load, supporting ultra-low-quiescent-current sensors.

Use Scenario: Protecting 4–20 mA loop receivers from induced surges in factory floor wiring.

IC Role / Device Role / Timing Role: Transient voltage suppressor placed across input terminals of current-to-voltage converter.

Use Value: Clamps spikes >22 V within 10 ns, limiting receiver IC stress to <100 V peak.

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%, 300 mW, 100 nA leakage, SOT-23 - lower power rating	Not suitable for sustained >13.6 mA loads due to reduced P_tot	Select when thermal budget is constrained and peak current remains <12 mA
BZX84-C22-7-F	22 V ±5%, 350 mW, 100 nA leakage, identical SOT-23 - no marking variant	Same electrical performance; differs only in top-side laser marking format	Choose for legacy BOM continuity where DG/B4R marking is not required

Compared with BZX84-C22/DG/B4R, MMBZ5248BS-7-F trades 50 mW power headroom for marginally better traceability, while BZX84-C22-7-F offers full functional equivalence with simplified marking-both require identical layout and thermal design.

Availability

BZX84-C22/DG/B4R is available at Aetrix Electronics and suitable for microcontroller protection, ADC reference stabilization, and low-power sensor supply rails requiring stable component supply and long-term manufacturing continuity.

Supply support for BZX84-C22/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 the BZX84 series of general-purpose Zener diodes, engineered for cost-sensitive, space-constrained voltage regulation and protection in consumer, industrial, and automotive electronics.

FAQ

What is the maximum reverse current at which BZX84-C22/DG/B4R maintains its rated Zener voltage?

The device is tested and specified at 5 mA reverse current, where V_Z = 22 V ±5%. At 1 mA, voltage drops to ~21.5 V; at 20 mA, it rises to ~22.8 V due to dynamic impedance. Operation beyond 15.9 mA continuously exceeds 350 mW dissipation at 22 V and requires thermal derating.

Can BZX84-C22/DG/B4R be used in series for higher voltage regulation?

No-Zener diodes in series exhibit mismatched temperature coefficients and dynamic impedances, causing uneven voltage division and thermal runaway risk. For >22 V regulation, use a single higher-voltage Zener or active regulation with feedback control.

Is the SOT-23 package lead-free and RoHS compliant?

Yes-BZX84-C22/DG/B4R meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound, certified per Nexperia's Q101 qualification and J-STD-020 moisture sensitivity level 1.

How does the 100 nA reverse leakage affect battery-powered applications?

At 100 nA, the diode draws just 0.086 C per year from a 3.7 V Li-ion cell-less than 0.001% annual capacity loss. This makes it suitable for decade-long deployments in IoT sensors where self-discharge dominates standby loss.

BZX84-C22/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):: 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/B4R FAQ

1.How can I place an order for BZX84-C22/DG/B4R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C22/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-C22/DG/B4R reliable?

The price and inventory of BZX84-C22/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-C22/DG/B4R is usually 5 days.

3.What payment methods are accepted for BZX84-C22/DG/B4R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C22/DG/B4R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C22/DG/B4R?

BZX84-C22/DG/B4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C22/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-C22/DG/B4R?

For technical support, including BZX84-C22/DG/B4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C22/DG/B4R requirements.

6.How does Aetrix verify that BZX84-C22/DG/B4R is sourced from the original manufacturer or authorized distributors?

All BZX84-C22/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-C22/DG/B4R meets industry standards.

7.What is the process for return or replacement of BZX84-C22/DG/B4R?

All BZX84-C22/DG/B4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C22/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-C22/DG/B4R part is unused and in its original packaging.

Return procedure for BZX84-C22/DG/B4R:

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…