BZX79-B6V2,133 Equivalent & Substitute Parts

Part Overview

The BZX79-B6V2,133 is a Zener diode manufactured by Nexperia USA Inc., rated at 6.2 V nominal with 400 mW maximum power dissipation. This through-hole component operates across a temperature range of -65°C to 200°C and is classified as Active product status. The device is ROHS3 compliant and carries Moisture Sensitivity Level 1 (Unlimited).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. Alternative sources and packaging variants may be required due to inventory availability, supply chain considerations, or specific application requirements.

Substiute Parts

BZX79-B6V2,133

Nexperia USA Inc.In Stock: 10451BZX79-B6V2,133 Datasheet

Current PartRFQ

BZX79-B6V2,143

Nexperia USA Inc.In Stock: 4388BZX79-B6V2,143 Datasheet

Parametric EquivalentRFQ

1N4691

Microchip TechnologyIn Stock: 21721N4691 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX79-B6V2,133 are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Electrical Parameters:

• Zener voltage (Vz) of 6.2 V nominal
• Maximum power dissipation capability
• Tolerance specification
• Reverse leakage current characteristics
• Forward voltage characteristics
• Operating temperature range

Mechanical Parameters:

• Through-hole mounting configuration
• DO-35 or DO-204AH axial package compatibility

Parts are grouped into two categories: Parametric Equivalents (identical electrical and mechanical specifications from the same manufacturer) and Similar Alternatives (equivalent zener voltage with acceptable variations in power rating, tolerance, or temperature range from alternative manufacturers).

Parameter Comparison

Engineering Selection Recommendations

BZX79-B6V2,143 (Nexperia USA Inc.)

This part is a parametric equivalent to the BZX79-B6V2,133. All electrical specifications, mechanical configuration, and compliance certifications are identical. The BZX79-B6V2,143 differs only in supplier device package designation (143 versus 133), which represents internal Nexperia packaging variants. Both parts maintain ROHS3 compliance and identical performance characteristics. Selection between these two Nexperia variants is based on inventory availability and supply chain logistics.

1N4691 (Microchip Technology)

The 1N4691 provides a similar alternative with the same 6.2 V zener voltage and through-hole DO-35 package configuration. This part offers higher maximum power dissipation (500 mW versus 400 mW), providing additional thermal margin in applications. However, the 1N4691 exhibits the following differences:

• Tolerance specification of ±5% (versus ±2% for BZX79-B6V2,133)
• Higher reverse leakage current (10 µA @ 5 V versus 3 µA @ 4 V)
• Higher forward voltage (1.1 V @ 200 mA versus 900 mV @ 10 mA)
• Maximum operating temperature limited to 175°C (versus 200°C)
• RoHS non-compliant status

Selection of the 1N4691 is appropriate for applications where RoHS compliance is not required, higher power dissipation capability is beneficial, and the relaxed tolerance and leakage specifications are acceptable.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B6V2,143 be used as a direct replacement for BZX79-B6V2,133?

A: Yes. The BZX79-B6V2,143 is a parametric equivalent with identical electrical specifications, tolerance, power rating, impedance, leakage current, forward voltage, operating temperature range, and compliance certifications. The difference in part number suffix (143 versus 133) reflects internal Nexperia packaging variants only.

Q: What are the key differences between BZX79-B6V2,133 and 1N4691?

A: Both devices share a 6.2 V nominal zener voltage and through-hole DO-35 package. The 1N4691 provides higher power dissipation (500 mW versus 400 mW) but has a wider tolerance (±5% versus ±2%), higher reverse leakage current, higher forward voltage, a lower maximum operating temperature (175°C versus 200°C), and is RoHS non-compliant.

Q: Is the 1N4691 suitable for applications requiring ROHS3 compliance?

A: No. The 1N4691 is RoHS non-compliant. Applications requiring ROHS3 compliance must use either BZX79-B6V2,133 or BZX79-B6V2,143.

Q: Can the 1N4691 be used in high-temperature applications?

A: The 1N4691 operates to a maximum of 175°C, which is 25°C lower than the BZX79-B6V2,133 maximum of 200°C. Applications requiring operation above 175°C must use the Nexperia variants.

Q: What is the significance of the ±2% tolerance on BZX79-B6V2,133 compared to the ±5% tolerance on 1N4691?

A: The ±2% tolerance on BZX79-B6V2,133 provides tighter zener voltage control, resulting in more precise voltage regulation. Applications requiring strict voltage accuracy should use the BZX79-B6V2,133 or BZX79-B6V2,143 rather than the 1N4691.

Q: Are all substitute parts available in the same packaging?

A: Yes. All three parts (BZX79-B6V2,133, BZX79-B6V2,143, and 1N4691) are available in DO-204AH, DO-35, and axial package configurations suitable for through-hole mounting.

Q: What is the difference between reverse leakage current specifications?

A: BZX79-B6V2,133 specifies 3 µA @ 4 V, while 1N4691 specifies 10 µA @ 5 V. Lower leakage current indicates better diode quality and reduced power loss in standby conditions. The BZX79-B6V2,133 exhibits superior leakage characteristics.