BZX79-C33,133 Equivalent & Substitute Parts

Part Overview

The BZX79-C33,133 is a Zener diode rated at 33 V nominal voltage with 400 mW maximum power dissipation, manufactured by Nexperia USA Inc. This through-hole component operates across a temperature range of -65°C to 200°C and is housed in a DO-204AH (DO-35) axial package. The device maintains an active product status and carries ROHS3 compliance certification.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. The primary distinction between the main part and its substitute lies in the voltage tolerance specification, which affects precision requirements in voltage regulation applications.

Substiute Parts

BZX79-C33,133

Nexperia USA Inc.In Stock: 5839BZX79-C33,133 Datasheet

Current PartRFQ

BZX79-B33,133

Nexperia USA Inc.In Stock: 11017BZX79-B33,133 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZX79-C33,133 is determined by the following criteria:

Mandatory Matching Parameters:

• Voltage - Zener (Nominal): 33 V
• Power - Maximum: 400 mW
• Impedance (Maximum): 80 Ohms
• Current - Reverse Leakage @ Vr: 50 nA
• Voltage - Forward (Maximum) @ If: 900 mV @ 10 mA
• Operating Temperature Range: -65°C to 200°C
• Mounting Type: Through Hole
• Package / Case: DO-204AH, DO-35, Axial
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameter:

• Tolerance: The main part specifies ±5%, while substitute parts may specify ±2% or tighter tolerances. Tighter tolerances represent improved precision and are electrically compatible with applications designed for the ±5% specification.

The BZX79-B33,133 qualifies as a parametric equivalent because it maintains all mandatory electrical and mechanical specifications while offering enhanced voltage tolerance performance.

Parameter Comparison

Engineering Selection Recommendations

Both the BZX79-C33,133 and BZX79-B33,133 maintain active product status from Nexperia USA Inc. and carry identical ROHS3 compliance and REACH unaffected certifications. Both components are suitable for applications requiring a 33 V Zener diode with 400 mW power rating in a through-hole axial package.

The BZX79-B33,133 offers improved voltage tolerance at ±2% compared to the ±5% specification of the BZX79-C33,133. This tighter tolerance makes the substitute part suitable for precision voltage regulation applications where voltage accuracy is critical. The substitute part is electrically and mechanically interchangeable with the main part in all circuit configurations.

Selection between these parts should be based on application tolerance requirements. Applications requiring standard ±5% tolerance can use either part. Applications requiring tighter voltage accuracy specifications should use the BZX79-B33,133.

Frequently Asked Questions (FAQ)

Q: Can the BZX79-B33,133 be used as a direct replacement for the BZX79-C33,133?

A: Yes. The BZX79-B33,133 is a parametric equivalent with identical electrical ratings and mechanical specifications. The substitute part features tighter voltage tolerance (±2% versus ±5%), which represents improved performance and maintains full compatibility with circuit designs specified for the main part.

Q: What is the primary difference between these two parts?

A: The primary difference is voltage tolerance. The BZX79-C33,133 specifies ±5% tolerance, while the BZX79-B33,133 specifies ±2% tolerance. Both parts maintain the same 33 V nominal voltage, 400 mW power rating, and all other electrical and mechanical parameters.

Q: Are the packages identical?

A: Yes. Both parts use the DO-204AH (DO-35) axial through-hole package. They are mechanically interchangeable and require no circuit board layout modifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the BZX79-C33,133 and BZX79-B33,133 are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited).

Q: Which part should I select for my application?

A: Select based on your voltage tolerance requirements. For applications requiring standard ±5% tolerance, either part is suitable. For applications requiring tighter voltage accuracy at ±2%, select the BZX79-B33,133. Both parts are electrically and mechanically compatible with identical operating temperature ranges (-65°C to 200°C).

Q: Are there any thermal or power dissipation differences?

A: No. Both parts are rated for identical maximum power dissipation of 400 mW and operate across the same temperature range of -65°C to 200°C.