1N5241 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5241 is an 11 V, 500 mW Zener diode in DO-35 axial through-hole packaging manufactured by SMC Diode Solutions. This component is classified as obsolete, indicating discontinued production and limited availability from original sources. The 1N5241B TR PBFREE serves as a direct functional equivalent, offering identical electrical specifications with active product status and lead-free compliance, making it suitable for applications requiring continued supply and modern manufacturing standards.

Substiute Parts

1N5241

SMC Diode SolutionsIn Stock: 38781N5241 Datasheet

Current PartRFQ

1N5241B TR PBFREE

Central Semiconductor CorpIn Stock: 77261N5241B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5241 with the 1N5241B TR PBFREE is based on strict electrical and mechanical parameter equivalence. The substitute part maintains identical specifications across all critical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 11 V (nominal)
• Maximum power dissipation: 500 mW
• Maximum impedance: 22 Ohms
• Reverse leakage current: 2 µA @ 8.4 V
• Forward voltage: 1.1 V @ 200 mA

Mechanical Equivalence Criteria:

• Package type: DO-35 axial through-hole
• Mounting method: Through-hole PCB assembly
• Physical form factor: Identical

Compliance and Status Differences:

• 1N5241B TR PBFREE carries active product status with RoHS3 compliance and lead-free manufacturing
• Original 1N5241 is obsolete with no specified RoHS status

The 1N5241B TR PBFREE is supplied in Cut Tape (CT) packaging, suitable for automated assembly processes, whereas the original part packaging is unspecified.

Parameter Comparison

Engineering Selection Recommendations

The 1N5241B TR PBFREE is a direct electrical and mechanical substitute for the 1N5241. Selection of the substitute part is supported by the following factors:

Product Availability: The original 1N5241 is obsolete with no ongoing production. The 1N5241B TR PBFREE maintains active product status with 7,707 units in stock, ensuring supply continuity for new designs and production runs.

Compliance and Manufacturing Standards: The 1N5241B TR PBFREE is RoHS3 compliant and manufactured with lead-free processes, meeting current environmental and manufacturing regulations. The original part carries no specified RoHS status, indicating it may not meet modern procurement requirements.

Electrical Performance: All critical electrical parameters are identical between the two parts. The substitute specifies a ±5% tolerance on zener voltage, providing explicit tolerance information not available for the original part.

Mechanical Compatibility: Both parts use identical DO-35 axial through-hole packaging, ensuring direct PCB layout compatibility without redesign.

Regulatory Alignment: Both parts maintain identical REACH and ECCN classifications, supporting regulatory compliance in international markets.

Frequently Asked Questions (FAQ)

Q: Can the 1N5241B TR PBFREE be used as a direct replacement for the 1N5241 in existing designs?

A: Yes. The 1N5241B TR PBFREE is electrically and mechanically equivalent to the 1N5241. All critical parameters including zener voltage (11 V), power rating (500 mW), impedance (22 Ohms), and package type (DO-35 axial) are identical. No circuit modifications are required.

Q: What is the difference between the original 1N5241 and the 1N5241B TR PBFREE?

A: The primary differences are product status and manufacturing compliance. The 1N5241 is obsolete, while the 1N5241B TR PBFREE is an active product with RoHS3 compliance and lead-free manufacturing. The substitute also specifies a ±5% zener voltage tolerance and a complete operating temperature range (-65°C to 200°C) versus the original's maximum temperature specification only.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use DO-35 axial through-hole packaging with identical physical dimensions and lead configuration. The 1N5241B TR PBFREE is supplied in Cut Tape (CT) packaging for automated assembly, while the original part's packaging format is unspecified.

Q: What does the "TR PBFREE" designation indicate?

A: "TR" indicates tape reel packaging suitable for automated pick-and-place assembly. "PBFREE" indicates lead-free (Pb-free) manufacturing, compliant with RoHS3 regulations.

Q: Is the 1N5241B TR PBFREE suitable for high-temperature applications?

A: Yes. The substitute part is rated for operation up to 200°C, matching the original part's maximum temperature specification. The substitute additionally specifies a minimum operating temperature of -65°C, providing a complete operating range.

Q: What is the significance of the ±5% tolerance specification on the 1N5241B TR PBFREE?

A: The ±5% tolerance specifies the accuracy of the zener voltage at the nominal 11 V rating. This means the actual zener voltage will fall between 10.45 V and 11.55 V. This tolerance specification is not provided for the original 1N5241, but the substitute's tolerance is standard for this component class.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts are through-hole components with identical DO-35 axial packaging. They can be installed in the same PCB footprint without modification. The 1N5241B TR PBFREE's tape reel packaging is compatible with standard automated assembly equipment.