1N5262C-TR Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5262C-TR is a 51 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-35 package format. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. The device operates across a temperature range of -65°C to 175°C with ±2% voltage tolerance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter ranges for this diode category.

Substiute Parts

1N5262C-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 10481N5262C-TR Datasheet

Current PartRFQ

BZX55B51-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 21075BZX55B51-TAP Datasheet

Parametric EquivalentRFQ

BZX79-B51,113

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

MFR RecommendedRFQ

BZX79-B51,133

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5262C-TR is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 51 V nominal
• Voltage tolerance: ±2%
• Package type: DO-35 (DO-204AH) through-hole axial configuration
• Mounting type: Through hole
• Operating temperature range: Minimum -65°C to 175°C
• Compliance: ROHS3, AEC-Q101 automotive qualification

Secondary Compatibility Parameters:

• Power dissipation rating: 500 mW or greater
• Impedance (maximum): 125 Ohms or lower
• Reverse leakage current: 100 nA @ 39 V or lower
• Forward voltage: 1.1 V @ 200 mA or lower

Substitute parts are grouped based on whether they maintain the primary matching criteria. Parts that differ in power rating, impedance, or forward voltage characteristics while maintaining the core electrical specifications are classified as parametric equivalents. Parts with reduced power ratings or modified package formats are classified as manufacturer-recommended alternatives with noted deviations.

Parameter Comparison

Engineering Selection Recommendations

BZX55B51-TAP (Parametric Equivalent)

The BZX55B51-TAP is a direct parametric equivalent to the 1N5262C-TR. Both devices share identical zener voltage (51 V), tolerance (±2%), power rating (500 mW), impedance (125 Ohms), and operating temperature range (-65°C to 175°C). Both components carry AEC-Q101 automotive qualification and ROHS3 compliance. The primary difference is packaging format: BZX55B51-TAP is supplied in cut tape format versus tape & reel for the 1N5262C-TR. Forward voltage specification differs slightly (1.5 V @ 200 mA versus 1.1 V @ 200 mA), remaining within acceptable circuit tolerance margins for 51 V zener applications. This substitute is suitable for direct replacement in automotive-grade applications.

BZX79-B51,113 and BZX79-B51,133 (Manufacturer-Recommended Alternatives)

The BZX79-B51,113 and BZX79-B51,133 are manufacturer-recommended alternatives from Nexperia USA Inc. Both maintain the 51 V zener voltage and ±2% tolerance. However, these parts operate at reduced maximum power dissipation (400 mW versus 500 mW) and exhibit higher impedance (180 Ohms versus 125 Ohms). These devices extend the upper operating temperature limit to 200°C. Reverse leakage current is lower (50 nA @ 35.7 V versus 100 nA @ 39 V). Forward voltage is specified at different test conditions (900 mV @ 10 mA). These alternatives are suitable for applications where the 400 mW power rating is sufficient and the extended temperature range provides operational advantage. Neither part carries explicit automotive grade or AEC-Q101 qualification in the provided specifications.

Frequently Asked Questions (FAQ)

Q: Can BZX55B51-TAP replace 1N5262C-TR in automotive applications?

A: Yes. The BZX55B51-TAP maintains identical electrical specifications (51 V, ±2%, 500 mW, 125 Ohms impedance) and carries AEC-Q101 automotive qualification. The only difference is packaging format (cut tape versus tape & reel). Forward voltage specification differs slightly but remains within acceptable tolerance for 51 V zener circuits.

Q: What is the difference between tape & reel and cut tape packaging?

A: Tape & reel (TR) format supplies components on continuous carrier tape wound on a reel for automated assembly equipment. Cut tape (CT) format provides the same components on shorter tape segments. Both formats use identical DO-35 package geometry and are mechanically compatible for through-hole mounting.

Q: Are BZX79-B51,113 and BZX79-B51,133 suitable replacements for the 1N5262C-TR?

A: These parts maintain the 51 V zener voltage and ±2% tolerance but operate at 400 mW maximum power versus 500 mW for the 1N5262C-TR. Selection depends on circuit power dissipation requirements. If the application requires the full 500 mW rating, these alternatives are not suitable. If circuit power dissipation is below 400 mW, these parts are compatible. Neither part carries explicit AEC-Q101 qualification in the provided specifications.

Q: What parameters must remain constant for zener diode substitution?

A: Zener voltage (51 V), voltage tolerance (±2%), and package type (DO-35 through-hole) must remain constant. Operating temperature range must meet or exceed the original specification (-65°C to 175°C minimum). Power rating and impedance may vary if the application requirements permit.

Q: Can I use a lower power-rated zener diode as a substitute?

A: No. A lower power-rated device (400 mW versus 500 mW) cannot replace a 500 mW component in applications requiring the full power dissipation capability. Circuit analysis must confirm that actual power dissipation remains below the substitute part's rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (BZX55B51-TAP, BZX79-B51,113, BZX79-B51,133) are ROHS3 compliant, matching the compliance status of the 1N5262C-TR.

Q: What is the significance of impedance differences between parts?

A: Impedance affects zener voltage regulation under varying load conditions. The 1N5262C-TR and BZX55B51-TAP both specify 125 Ohms maximum impedance. The BZX79 series specifies 180 Ohms maximum impedance, resulting in slightly reduced regulation performance. Circuit design must account for this difference if tight voltage regulation is required.