1N5241B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5241B is an 11 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-204AH (DO-35) axial through-hole package. This component is classified as obsolete, though inventory remains available. The 1N5241B is qualified to AEC-Q101 automotive standards and complies with ROHS3 regulations. Due to its obsolete status, identifying active equivalent parts ensures continued design support and supply chain reliability for new production and maintenance applications.

Substiute Parts

1N5241B-T

Vishay General Semiconductor - Diodes DivisionIn Stock: 8161N5241B-T Datasheet

Current PartRFQ

1N5241B-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 660721N5241B-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5241B is determined by electrical and mechanical parameter equivalence within the Zener diode category. The critical parameters governing substitution are:

Electrical Parameters:

• Zener voltage (Vz): 11 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Reverse leakage current: 2 µA @ 8.4 V
• Forward voltage: 1.1 V @ 200 mA
• Operating temperature: 175°C maximum

Mechanical Parameters:

• Package type: DO-204AH (DO-35) axial through-hole
• Mounting type: Through-hole

Compliance Parameters:

• Automotive grade qualification: AEC-Q101
• RoHS compliance: ROHS3

The 1N5241B-TR is a direct electrical and mechanical equivalent manufactured by the same supplier. Both parts share identical nominal Zener voltage, tolerance, power rating, reverse leakage characteristics, forward voltage specifications, and operating temperature limits. Both are AEC-Q101 qualified and ROHS3 compliant. The primary distinction is product status and packaging format: the 1N5241B is obsolete with limited inventory, while the 1N5241B-TR is active with significantly higher stock availability.

Parameter Comparison

Engineering Selection Recommendations

The 1N5241B-TR is the direct active equivalent for the obsolete 1N5241B. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications for Zener voltage, power rating, reverse leakage, forward voltage, and operating temperature. Both are AEC-Q101 qualified for automotive applications and ROHS3 compliant.

Selection of the 1N5241B-TR is appropriate for:

• New production designs requiring an 11 V, 500 mW Zener diode in DO-35 package
• Replacement of obsolete 1N5241B inventory in existing designs
• Automotive applications requiring AEC-Q101 qualification
• Applications requiring ROHS3 compliance

The 1N5241B-TR offers superior supply chain availability with 66,049 pieces in stock compared to the 1N5241B's 765 pieces. The 1N5241B-TR is supplied in Cut Tape (CT) packaging format, suitable for automated assembly processes.

Note: The impedance specification differs between the two parts (600 Ohms for 1N5241B versus 22 Ohms for 1N5241B-TR). This parameter variation does not affect substitution eligibility for standard voltage regulation and overvoltage protection applications within the specified electrical operating range.

Frequently Asked Questions (FAQ)

Q: Can the 1N5241B-TR directly replace the 1N5241B in existing designs?

A: Yes. The 1N5241B-TR is electrically and mechanically equivalent to the 1N5241B. Both components have identical Zener voltage (11 V), power rating (500 mW), tolerance (±5%), reverse leakage (2 µA @ 8.4 V), forward voltage (1.1 V @ 200 mA), and operating temperature (175°C). Both are packaged in DO-204AH (DO-35) axial through-hole format and are AEC-Q101 qualified.

Q: What is the difference between the 1N5241B and 1N5241B-TR?

A: The primary differences are product status and packaging format. The 1N5241B is obsolete with limited inventory (765 pieces), while the 1N5241B-TR is active with significantly higher availability (66,049 pieces). The 1N5241B-TR is supplied in Cut Tape (CT) format for automated assembly, whereas the 1N5241B is supplied in bulk packaging. The impedance specification also differs (600 Ohms versus 22 Ohms), though this does not affect functional equivalence for standard applications.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the 1N5241B and 1N5241B-TR are automotive-grade components qualified to AEC-Q101 standards. Both are ROHS3 compliant and suitable for automotive circuit protection and voltage regulation applications.

Q: What is the DO-35 package?

A: The DO-35 package, formally designated DO-204AH, is a standard axial through-hole package for discrete diodes. The component has two leads extending from opposite ends of a cylindrical body, suitable for insertion into through-hole PCB designs. Both the 1N5241B and 1N5241B-TR use this package type.

Q: Why is the 1N5241B obsolete?

A: The 1N5241B is classified as obsolete by the manufacturer. The 1N5241B-TR is the active equivalent part maintained in current production. For new designs and ongoing production, the 1N5241B-TR is the recommended selection.

Q: Can I use the 1N5241B-TR in Cut Tape packaging for manual assembly?

A: Yes. Although the 1N5241B-TR is supplied in Cut Tape (CT) format optimized for automated pick-and-place assembly, the individual components can be used in manual assembly processes. The component itself is identical to bulk-packaged versions.