BZX79-B51,113 Equivalent & Substitute Parts

Part Overview

The BZX79-B51,113 is an active zener diode manufactured by Nexperia USA Inc., rated at 51 V nominal zener voltage with 400 mW maximum power dissipation. 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 device maintains ±2% voltage tolerance and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter ranges.

Substiute Parts

BZX79-B51,113

Nexperia USA Inc.In Stock: 10421BZX79-B51,113 Datasheet

Current PartRFQ

BZX79-B51,133

Nexperia USA Inc.In Stock: 9486BZX79-B51,133 Datasheet

Parametric EquivalentRFQ

BZX55C51-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 40368BZX55C51-TAP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX79-B51,113 are classified based on electrical and mechanical parameter alignment:

Parametric Equivalent Classification: Parts that match all critical electrical specifications including nominal zener voltage (51 V), tolerance (±2%), maximum power rating (400 mW), impedance characteristics (180 Ohms maximum), and operating temperature range (-65°C to 200°C). These components are direct functional replacements with identical performance boundaries.

Similar Classification: Parts that maintain the same nominal zener voltage (51 V) and through-hole axial package configuration but differ in one or more secondary parameters such as power rating, tolerance, impedance, or operating temperature range. These components provide functional substitution within modified design constraints.

The following parameters determine substitution eligibility:

• Nominal zener voltage (Vz): 51 V
• Package type: Through-hole axial (DO-204AH / DO-35)
• Mounting compatibility: Axial lead configuration
• Compliance status: ROHS3 compliant

Parameter Comparison

Engineering Selection Recommendations

BZX79-B51,133 Selection: This part is a parametric equivalent to the BZX79-B51,113, manufactured by the same supplier (Nexperia USA Inc.) with identical electrical specifications. Both components share the same nominal zener voltage, tolerance, power rating, impedance, and operating temperature range. Selection of BZX79-B51,133 provides direct functional equivalence with no design modification required. Both parts maintain active product status and ROHS3 compliance.

BZX55C51-TAP Selection: This part is classified as a similar substitute manufactured by Vishay General Semiconductor - Diodes Division. The BZX55C51-TAP maintains the same 51 V nominal zener voltage and through-hole axial package configuration. However, this component differs in the following parameters: tolerance specification (±5% versus ±2%), maximum power rating (500 mW versus 400 mW), impedance (125 Ohms versus 180 Ohms), reverse leakage current (100 nA @ 39 V versus 50 nA @ 35.7 V), and maximum operating temperature (175°C versus 200°C). The BZX55C51-TAP carries AEC-Q101 automotive qualification and is suitable for applications where the relaxed tolerance and higher power capability are acceptable. This component is active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B51,133 be used as a direct replacement for BZX79-B51,113?

A: Yes. The BZX79-B51,133 is a parametric equivalent with identical electrical and mechanical specifications. No circuit modifications are required for substitution.

Q: What are the key differences between BZX79-B51,113 and BZX55C51-TAP?

A: The primary differences are: (1) voltage tolerance is ±5% for BZX55C51-TAP versus ±2% for BZX79-B51,113; (2) maximum power rating is 500 mW versus 400 mW; (3) impedance is 125 Ohms versus 180 Ohms; (4) maximum operating temperature is 175°C versus 200°C; (5) BZX55C51-TAP includes AEC-Q101 automotive qualification. The nominal zener voltage and package type remain identical at 51 V and DO-35 axial configuration.

Q: Is the BZX55C51-TAP suitable for high-temperature applications?

A: The BZX55C51-TAP operates to a maximum temperature of 175°C, which is 25°C lower than the BZX79-B51,113 maximum of 200°C. Applications requiring operation above 175°C require the BZX79-B51,113 or BZX79-B51,133.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The BZX79-B51,113, BZX79-B51,133, and BZX55C51-TAP are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Can the BZX55C51-TAP be used in applications requiring ±2% tolerance?

A: The BZX55C51-TAP carries ±5% tolerance specification. Applications with strict ±2% tolerance requirements must use BZX79-B51,113 or BZX79-B51,133.

Q: What is the package compatibility between these parts?

A: All three parts use the DO-204AH (DO-35) axial through-hole package configuration. Physical lead spacing and mounting footprint are identical, allowing direct board-level substitution without layout modification.

Q: Does the BZX55C51-TAP have automotive qualification?

A: Yes. The BZX55C51-TAP carries AEC-Q101 automotive qualification and is graded for automotive applications. The BZX79-B51,113 and BZX79-B51,133 do not carry automotive qualification designation.