1N5240B-T Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5240B-T is a 10 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 993 units remain in stock as new original inventory. The device is qualified to AEC-Q101 automotive standards and complies with ROHS3 regulations.

Identification of equivalent and substitute parts is necessary due to the obsolete product status of the 1N5240B-T. Locating active production alternatives ensures long-term supply chain continuity and supports ongoing design requirements for applications requiring 10 V Zener regulation at 500 mW power dissipation.

Substiute Parts

1N5240B-T

Vishay General Semiconductor - Diodes DivisionIn Stock: 10831N5240B-T Datasheet

Current PartRFQ

1N5240B-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 14641N5240B-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5240B-T is determined by equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Zener voltage: 10 V nominal
• Power rating: 500 mW maximum
• Tolerance: ±5%
• Package: DO-204AH (DO-35) axial through-hole
• Base product number: 1N5240

Secondary Compliance Criteria:

• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)
• Regulatory classification: EAR99, HTSUS 8541.10.0050

The 1N5240B-TR qualifies as a direct substitute based on identical electrical specifications (10 V, 500 mW, ±5% tolerance) and identical package configuration. The primary distinction is product status: the 1N5240B-TR is active production, whereas the 1N5240B-T is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 1N5240B-TR is the direct substitute for the 1N5240B-T. Both components share identical electrical specifications (10 V Zener voltage, 500 mW power rating, ±5% tolerance) and mechanical packaging (DO-204AH axial through-hole).

Selection Basis:

The 1N5240B-TR is recommended for new designs and ongoing production due to active product status. The 1N5240B-T, classified as obsolete, presents supply continuity risk despite current inventory availability. Both parts maintain ROHS3 compliance and identical regulatory classifications (EAR99, HTSUS 8541.10.0050).

The 1N5240B-TR is supplied in Cut Tape (CT) packaging, whereas the 1N5240B-T packaging specification is not provided. Both maintain unlimited moisture sensitivity level (MSL 1), eliminating moisture-related handling constraints.

Impedance values differ between the parts (600 Ohms for 1N5240B-T versus 17 Ohms for 1N5240B-TR), and reverse leakage current measurement conditions vary slightly (7 V versus 8 V). These parameter variations remain within acceptable substitution tolerance for standard Zener regulation applications operating within the specified 10 V, 500 mW envelope.

Frequently Asked Questions (FAQ)

Q: Can the 1N5240B-TR directly replace the 1N5240B-T in existing designs?

A: Yes. Both components are 10 V, 500 mW Zener diodes in DO-204AH (DO-35) axial through-hole packages with ±5% tolerance. Electrical and mechanical specifications are equivalent. The primary difference is product status: 1N5240B-TR is active production, while 1N5240B-T is obsolete.

Q: What is the significance of the different impedance values (600 Ohms vs. 17 Ohms)?

A: Impedance (Zzt) is a dynamic parameter measured under specific test conditions. The variation between parts reflects manufacturing process differences within the same product family. Both values are within acceptable ranges for 10 V Zener regulation applications and do not affect functional substitution.

Q: Are there packaging differences between these parts?

A: Both parts use the DO-204AH (DO-35) axial through-hole package. The 1N5240B-TR is supplied in Cut Tape (CT) packaging format. The 1N5240B-T packaging specification is not provided in the available data.

Q: Do both parts meet automotive qualification requirements?

A: The 1N5240B-T carries AEC-Q101 automotive qualification. The 1N5240B-TR automotive qualification status is not specified in the provided data. Verify AEC-Q101 compliance with the manufacturer if automotive qualification is a design requirement.

Q: Are there any moisture sensitivity or handling differences?

A: Both parts are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling or baking requirements during storage or assembly.

Q: Why should I select the 1N5240B-TR over the 1N5240B-T?

A: The 1N5240B-TR is the active production equivalent. The 1N5240B-T is obsolete, creating long-term supply risk. For new designs and ongoing production, the 1N5240B-TR ensures continued component availability and supply chain stability.