BZX79-C33,143 Equivalent & Substitute Parts

Part Overview

The BZX79-C33,143 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 packaged in the DO-204AH (DO-35) axial configuration. The part is Active in product status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging format preferences, or tolerance specifications.

Substiute Parts

BZX79-C33,143

Nexperia USA Inc.In Stock: 1220BZX79-C33,143 Datasheet

Current PartRFQ

BZX79-B33,133

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

Parametric EquivalentRFQ

BZX79-C33,133

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX79-C33,143 is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage (Nom): 33 V
• Maximum power dissipation: 400 mW
• Impedance (Max): 80 Ohms
• Forward voltage and reverse leakage characteristics

Mechanical Compatibility Criteria:

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

Compliance & Status Criteria:

• Product Status: Active
• RoHS Status: ROHS3 Compliant
• Operating temperature range: -65°C to 200°C

Substitute parts maintain identical electrical performance within the specified parameters while differing in packaging format (Tape & Box versus Cut Tape) and tolerance specification (±5% versus ±2%).

Parameter Comparison

Engineering Selection Recommendations

BZX79-B33,133 Selection Criteria: The BZX79-B33,133 is a direct electrical substitute with tighter tolerance specification (±2% versus ±5%). This part is suitable for applications requiring improved voltage accuracy. Both parts maintain identical maximum power dissipation, impedance, and operating temperature range. The primary difference is packaging format (Cut Tape versus Tape & Box) and tolerance grade. Selection of this part is appropriate when tighter voltage tolerance is a design requirement and Cut Tape packaging is acceptable for assembly processes.

BZX79-C33,133 Selection Criteria: The BZX79-C33,133 is a direct electrical and parametric equivalent to the BZX79-C33,143, differing only in packaging format (Cut Tape versus Tape & Box). This part maintains identical tolerance (±5%), voltage rating, power dissipation, and all electrical characteristics. Selection of this part is appropriate when Cut Tape packaging is preferred for automated assembly or when Tape & Box inventory is unavailable.

All substitute parts are Active in product status, ROHS3 compliant, and maintain the same compliance certifications as the main part number.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B33,133 be used as a direct replacement for BZX79-C33,143?

A: Yes. Both parts share identical zener voltage (33 V), maximum power dissipation (400 mW), impedance (80 Ohms), forward voltage, and operating temperature range (-65°C to 200°C). The BZX79-B33,133 features tighter tolerance (±2% versus ±5%), making it suitable for applications requiring improved voltage accuracy. Packaging format differs (Cut Tape versus Tape & Box), which may affect assembly process compatibility.

Q: Can BZX79-C33,133 be used as a direct replacement for BZX79-C33,143?

A: Yes. The BZX79-C33,133 is a parametric equivalent with identical electrical specifications, including zener voltage (33 V), tolerance (±5%), maximum power dissipation (400 mW), impedance (80 Ohms), and operating temperature range. The only difference is packaging format (Cut Tape versus Tape & Box). This part is suitable for direct substitution when Cut Tape packaging is compatible with assembly requirements.

Q: What is the difference between Tape & Box and Cut Tape packaging?

A: Tape & Box (TB) packaging provides components on continuous tape wound on a reel and packaged in a box, suitable for high-volume automated assembly. Cut Tape (CT) packaging provides components on tape segments cut to specific lengths, suitable for lower-volume applications or manual assembly. Both formats contain the same component in the same package (DO-204AH, DO-35, Axial).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part BZX79-C33,143 and all substitute parts (BZX79-B33,133 and BZX79-C33,133) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: What is the significance of the tolerance difference between ±5% and ±2%?

A: Tolerance specifies the allowable deviation from the nominal zener voltage of 33 V. The ±5% tolerance (BZX79-C33,143 and BZX79-C33,133) allows zener voltage between 31.35 V and 34.65 V. The ±2% tolerance (BZX79-B33,133) allows zener voltage between 32.34 V and 33.66 V. Tighter tolerance (±2%) is required for applications with strict voltage regulation specifications.

Q: Can these parts be used interchangeably in all circuit applications?

A: Interchangeability depends on application requirements. All three parts are electrically equivalent for basic zener diode function at 33 V, 400 mW. Applications requiring strict voltage tolerance specifications should use BZX79-B33,133 (±2%). Applications with ±5% tolerance requirements can use either BZX79-C33,143 or BZX79-C33,133. Packaging format selection depends on assembly process compatibility.