BZX79-C22,133 Equivalent & Substitute Parts

Part Overview

The BZX79-C22,133 is a 22 V, 400 mW Zener diode manufactured by Nexperia USA Inc. in a through-hole DO-204AH (DO-35) axial package. This component is classified as an active product with full RoHS3 compliance and REACH unaffected status. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts may be required due to packaging availability, inventory constraints, or specific tolerance requirements in circuit design.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Tolerance	±5%	—
Power - Maximum	400	mW
Impedance (Maximum)	55	Ohms
Current - Reverse Leakage @ Vr	50	nA
Voltage - Forward (Maximum) @ If	900 mV @ 10 mA	—
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
Supplier Device Package	ALF2	—

Substitute Part Grouping Explanation

Substitution of the BZX79-C22,133 is determined by the following critical parameters:

Electrical Parameters:

Zener voltage: 22 V (nominal)
Power dissipation: 400 mW (maximum)
Impedance: 55 Ohms (maximum)
Reverse leakage current: 50 nA
Forward voltage: 900 mV @ 10 mA
Operating temperature range: -65°C to 200°C

Mechanical Parameters:

Mounting type: Through Hole
Package: DO-204AH, DO-35, Axial
Supplier device package: ALF2

Tolerance Consideration: The BZX79-C22,133 specifies ±5% tolerance. Substitute parts with tighter tolerance (±2%) are electrically compatible and provide enhanced precision. Substitute parts with identical ±5% tolerance are direct functional equivalents.

Packaging Consideration: The main part is supplied in Cut Tape (CT) packaging. Substitute parts supplied in Bulk packaging are electrically and mechanically identical but differ only in delivery format.

Parameter Comparison

Parameter	BZX79-C22,133 (Main)	BZX79-C22,113	BZX79-C22,143	BZX79-B22,143
Manufacturer	Nexperia USA Inc.	NXP Semiconductors	NXP Semiconductors	NXP USA Inc.
Voltage - Zener (Nom)	22 V	22 V	22 V	22 V
Tolerance	±5%	±5%	±5%	±2%
Power - Max	400 mW	400 mW	400 mW	400 mW
Impedance (Max)	55 Ohms	55 Ohms	55 Ohms	55 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 15.4 V	50 nA @ 700 mV	50 nA @ 700 mV	50 nA @ 15.4 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 200°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Supplier Device Package	ALF2	ALF2	ALF2	ALF2
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	—	—	—
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	—

Engineering Selection Recommendations

All substitute parts listed are active products with confirmed inventory availability. Selection criteria are based on the following factors:

Direct Functional Equivalents (±5% Tolerance):

BZX79-C22,113 and BZX79-C22,143 are direct functional equivalents to the BZX79-C22,133, maintaining identical electrical specifications and ±5% tolerance. These parts are suitable for applications where the original specification tolerance is acceptable.

Enhanced Precision Alternative (±2% Tolerance):

BZX79-B22,143 provides tighter tolerance at ±2%, offering improved voltage regulation accuracy compared to the ±5% specification of the main part. This part is suitable for applications requiring enhanced precision in voltage reference or regulation circuits.

Compliance Considerations:

BZX79-C22,133 and BZX79-B22,143 carry explicit ECCN and HTSUS classifications, confirming regulatory compliance documentation.
All substitute parts maintain active product status and are manufactured by NXP Semiconductors or NXP USA Inc., ensuring supply chain continuity.

Packaging Format:

The main part is supplied in Cut Tape (CT) format. Substitute parts are supplied in Bulk format, which is suitable for high-volume assembly operations or when tape packaging is not required.

Frequently Asked Questions (FAQ)

Q: Can BZX79-C22,113 be used as a direct replacement for BZX79-C22,133?

A: Yes. Both parts share identical electrical specifications: 22 V nominal Zener voltage, 400 mW maximum power, 55 Ohms maximum impedance, and ±5% tolerance. The difference is packaging format (Bulk versus Cut Tape) and manufacturer designation. Electrical performance in the circuit is equivalent.

Q: What is the difference between BZX79-C22,143 and BZX79-B22,143?

A: Both parts are 22 V, 400 mW Zener diodes in DO-35 axial packages. The primary difference is tolerance: BZX79-C22,143 specifies ±5% tolerance, while BZX79-B22,143 specifies ±2% tolerance. The tighter tolerance of BZX79-B22,143 provides improved voltage regulation accuracy. Both are electrically compatible with the BZX79-C22,133.

Q: Does the reverse leakage current specification difference affect substitution?

A: The reverse leakage current is specified at different measurement points (15.4 V versus 700 mV) across the substitute parts, but all maintain the same 50 nA maximum value. This difference reflects measurement methodology and does not affect functional compatibility in circuit applications.

Q: Are all substitute parts RoHS3 compliant?

A: The BZX79-C22,133 and BZX79-B22,143 carry explicit RoHS3 compliance certification. BZX79-C22,113 and BZX79-C22,143 do not list RoHS status in the provided specifications. Verify RoHS compliance requirements with the manufacturer if this certification is mandatory for your application.

Q: Can I use Bulk-packaged parts in place of Cut Tape parts?

A: Yes. Bulk and Cut Tape packaging formats contain identical components. The packaging difference affects handling and assembly process compatibility, not electrical or mechanical performance. Confirm that your assembly equipment can accommodate Bulk packaging if switching from Cut Tape format.

Q: Which substitute part should I select for improved voltage regulation accuracy?

A: BZX79-B22,143 with ±2% tolerance provides tighter voltage regulation compared to the ±5% tolerance of the main part and other substitutes. Select this part for applications requiring enhanced precision in voltage reference or regulation circuits.

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