BZX79-B39,133 Equivalent & Substitute Parts

Part Overview

The BZX79-B39,133 is a Zener diode manufactured by Nexperia USA Inc., rated at 39 V nominal with 400 mW maximum power dissipation. This component is designed for voltage regulation and protection applications in electronic circuits. The part is currently Active in product status with 1131 pieces available in new original inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

BZX79-B39,133

Nexperia USA Inc.In Stock: 1209BZX79-B39,133 Datasheet

Current PartRFQ

BZX79-B39,143

Nexperia USA Inc.In Stock: 10337BZX79-B39,143 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX79-B39,133 are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - Zener (Nom) (Vz): 39 V
• Tolerance: ±2%
• Power - Max: 400 mW
• Impedance (Max) (Zzt): 130 Ohms
• Current - Reverse Leakage @ Vr: 50 nA @ 27.3 V
• Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
• Operating Temperature Range: -65°C ~ 200°C

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AH, DO-35, Axial
• Supplier Device Package: ALF2

Parts meeting all specified electrical and mechanical parameters are classified as parametric equivalents and direct substitutes. No derating or circuit modification is required for substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the BZX79-B39,133 and BZX79-B39,143 are Active products manufactured by Nexperia USA Inc. and are fully compliant with ROHS3 and REACH regulations. The parts are electrically and mechanically identical across all specified parameters, including zener voltage, power rating, impedance, leakage current, forward voltage, operating temperature range, and package configuration.

Selection between these parts is based on availability and supply chain requirements. The BZX79-B39,143 offers higher inventory availability (10300 pieces) compared to the BZX79-B39,133 (1131 pieces). Both parts are suitable for direct substitution in applications requiring a 39 V, 400 mW Zener diode in DO-35 axial through-hole packaging.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B39,143 be used as a direct replacement for BZX79-B39,133?

A: Yes. Both parts are manufactured by Nexperia USA Inc. and share identical electrical specifications (39 V nominal zener voltage, ±2% tolerance, 400 mW power rating, 130 Ohms maximum impedance) and mechanical specifications (DO-35 axial through-hole package, ALF2 supplier device package). Direct substitution requires no circuit modifications.

Q: Are there differences in the package or mounting between these parts?

A: No. Both parts use identical through-hole mounting with DO-204AH, DO-35, Axial package configuration and ALF2 supplier device package designation.

Q: What is the difference between the part numbers BZX79-B39,133 and BZX79-B39,143?

A: The part numbers differ only in the suffix designation (133 versus 143). This distinction does not reflect electrical or mechanical differences. Both parts meet identical specifications and are interchangeable.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both BZX79-B39,133 and BZX79-B39,143 are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the operating temperature range for these Zener diodes?

A: Both parts operate across the temperature range of -65°C to 200°C, providing performance stability across industrial and high-temperature applications.

Q: Is there a moisture sensitivity concern with these components?

A: No. Both parts have Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.