BZX84C22 Equivalent & Substitute Parts

Part Overview

The BZX84C22 is a surface mount zener diode manufactured by Taiwan Semiconductor Corporation, rated for 22 V nominal zener voltage with 300 mW maximum power dissipation. The device is packaged in SOT-23 (TO-236-3, SC-59) configuration and operates across the temperature range of -65°C to 150°C. This component is classified as Active product status and maintains full RoHS3 and REACH compliance.

Substitute parts are identified when electrical parameters and mechanical specifications align within the allowed tolerances for zener diodes in this voltage and power class. Equivalent devices enable design flexibility, support supply chain continuity, and accommodate varying packaging or qualification requirements across different manufacturing sources.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Power - Maximum	300	mW
Tolerance	±5.68%	%
Impedance (Maximum)	55	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 15.4 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution eligibility for the BZX84C22 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Zener voltage (Vz): 22 V nominal
Maximum power dissipation: 300 mW
Package type: SOT-23 (TO-236-3, SC-59, SOT-23-3)
Operating temperature range: -65°C to 150°C
Impedance (Zzt): 55 Ohms maximum
Reverse leakage current: 100 nA @ 15.4 V
Forward voltage: 900 mV @ 10 mA

Tolerance Variation: Substitute parts may exhibit tolerance specifications ranging from ±2% to ±5.68%. All listed substitutes maintain the nominal 22 V zener voltage within their respective tolerance bands and are electrically interchangeable at the circuit level.

Packaging Consideration: The main part is supplied in standard packaging, while substitute parts are available in Tape & Reel (TR) format. Both configurations use identical SOT-23 surface mount packages and are mechanically compatible.

Qualification Status: Certain substitute parts carry AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications where enhanced reliability screening is required.

Parameter Comparison

Parameter	BZX84C22	BZX84C22 RFG	BZX84B22Q-7-F	BZX84C22Q-13-F	BZX84C22Q-7-F
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Voltage - Zener (Nom)	22 V	22 V	22 V	22 V	22 V
Tolerance	±5.68%	±5%	±2%	±5.68%	±5.68%
Power - Max	300 mW	300 mW	300 mW	300 mW	300 mW
Impedance (Max)	55 Ohms	55 Ohms	55 Ohms	55 Ohms	55 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 15.4 V	100 nA @ 15.4 V	100 nA @ 15.4 V	100 nA @ 15.4 V	100 nA @ 15.4 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active
Grade	—	—	Automotive	Automotive	Automotive
Qualification	—	—	AEC-Q101	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

BZX84C22 RFG (Taiwan Semiconductor Corporation)

This substitute maintains identical electrical specifications to the main part with a tighter tolerance of ±5% versus ±5.68%. The device is supplied in Tape & Reel packaging and carries Active product status with full RoHS3 and REACH compliance. Selection of this part is appropriate for applications requiring standard industrial-grade zener diode performance without automotive qualification requirements.

BZX84B22Q-7-F (Diodes Incorporated)

This substitute offers the tightest tolerance specification at ±2%, providing enhanced voltage regulation accuracy. The device carries AEC-Q101 automotive qualification and Automotive grade designation, indicating compliance with automotive reliability and screening standards. This part is suitable for automotive applications, safety-critical circuits, or designs requiring superior voltage stability. Supplied in Tape & Reel format with Active product status.

BZX84C22Q-13-F (Diodes Incorporated)

This substitute maintains the same tolerance as the main part (±5.68%) and carries AEC-Q101 automotive qualification with Automotive grade designation. The device is supplied in Tape & Reel format with Active product status. Selection is appropriate for automotive applications requiring qualified components while maintaining the original tolerance specification.

BZX84C22Q-7-F (Diodes Incorporated)

All substitute parts are electrically and mechanically interchangeable with the BZX84C22 within the specified parameter ranges. Selection between substitutes depends on packaging format requirements, tolerance precision needs, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: What makes a part a valid substitute for the BZX84C22?

A: A substitute part must maintain the 22 V nominal zener voltage, 300 mW maximum power rating, SOT-23 package configuration, and identical operating temperature range of -65°C to 150°C. All electrical parameters including impedance, reverse leakage current, and forward voltage must match the specifications. Tolerance variations between ±2% and ±5.68% are acceptable as they represent different precision grades of the same nominal voltage.

Q: Can I use BZX84B22Q-7-F in place of BZX84C22 in my circuit?

A: Yes. The BZX84B22Q-7-F is electrically and mechanically compatible with the BZX84C22. Both devices share identical zener voltage (22 V), power rating (300 mW), package type (SOT-23), and operating temperature range. The BZX84B22Q-7-F offers tighter tolerance (±2%) and carries AEC-Q101 automotive qualification, making it suitable for applications requiring enhanced precision or automotive-grade reliability.

Q: What is the difference between the main part and BZX84C22 RFG?

A: The primary difference is packaging format and tolerance specification. The BZX84C22 RFG is supplied in Tape & Reel (TR) format, while the main part uses standard packaging. The BZX84C22 RFG also features a tighter tolerance of ±5% compared to the main part's ±5.68%. Both are manufactured by Taiwan Semiconductor Corporation and are electrically identical in circuit operation.

Q: Are the Diodes Incorporated substitutes (BZX84C22Q-7-F, BZX84C22Q-13-F, BZX84B22Q-7-F) suitable for automotive applications?

A: Yes. All three Diodes Incorporated substitutes carry AEC-Q101 automotive qualification and Automotive grade designation. These parts meet automotive reliability and screening standards and are suitable for automotive circuit applications. The BZX84B22Q-7-F offers the tightest tolerance at ±2%, while BZX84C22Q-7-F and BZX84C22Q-13-F maintain ±5.68% tolerance matching the original specification.

Q: Can I mix different substitute parts in the same production run?

A: All listed substitutes are electrically and mechanically interchangeable. However, mixing parts from different manufacturers or with different tolerance specifications may introduce minor variations in voltage regulation characteristics. For applications requiring consistent performance across multiple units, selection of a single substitute part is recommended.

Q: What does SOT-23 packaging mean?

A: SOT-23 is a surface mount package designation also known as TO-236-3 or SC-59. It is a three-terminal package commonly used for small signal diodes and transistors. All listed parts use this identical package configuration, ensuring mechanical compatibility and identical PCB footprint requirements.

Q: Is the BZX84C22 RoHS3 compliant?

A: Yes. The BZX84C22 and all listed substitute parts are RoHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic components in most jurisdictions.

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