1N5250B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5250B is a through-hole zener diode rated at 20 V nominal with 500 mW power dissipation capability, packaged in the DO-35 axial configuration. This component is classified as obsolete by the original manufacturer (SMC Diode Solutions), necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The substitute part maintains identical electrical specifications while offering active product status and improved compliance certifications.

Substiute Parts

1N5250B

SMC Diode SolutionsIn Stock: 14911N5250B Datasheet

Current PartRFQ

1N5250B TR PBFREE

Central Semiconductor CorpIn Stock: 10471N5250B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1N5250B is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Zener voltage: 20 V nominal
• Power rating: 500 mW minimum
• Voltage tolerance: ±5%
• Maximum impedance: 25 Ohms
• Reverse leakage current: 100 nA specification
• Forward voltage: 1.1 V @ 200 mA
• Package type: DO-35 axial through-hole configuration

The identified substitute part (1N5250B TR PBFREE) satisfies all mandatory electrical parameters. The primary distinction is packaging format (Tape & Reel versus bulk) and product status transition from obsolete to active manufacturing. The substitute is manufactured by Central Semiconductor Corp and includes RoHS3 compliance certification, providing enhanced regulatory alignment for new designs.

Parameter Comparison

Engineering Selection Recommendations

The 1N5250B TR PBFREE qualifies as a direct electrical substitute for the obsolete 1N5250B based on complete parameter equivalence across all specified electrical characteristics. Selection of the substitute part is supported by the following factors:

Product Status: The substitute maintains active manufacturing status, ensuring long-term availability and supply chain continuity. The original part's obsolete classification creates procurement risk for ongoing production and field service applications.

Compliance Certifications: The substitute carries RoHS3 compliance certification, meeting current regulatory requirements for electronic components in most jurisdictions. Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications.

Electrical Performance: All critical electrical parameters—zener voltage, power rating, tolerance, impedance, and leakage current—are identical or equivalent. The substitute's extended operating temperature range (-65°C to 200°C versus 200°C maximum) provides additional thermal margin without compromising performance.

Physical Compatibility: Both parts utilize identical DO-35 axial through-hole packaging, ensuring direct mechanical compatibility with existing PCB designs and assembly processes.

Packaging Consideration: The substitute is supplied in Tape & Reel format, which is standard for automated assembly operations. Bulk packaging can be sourced through component distributors if required for manual assembly or prototyping applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5250B TR PBFREE be used as a direct replacement in existing designs?

A: Yes. The substitute part is electrically and mechanically identical to the original 1N5250B. Both components share the same DO-35 axial package, zener voltage (20 V), power rating (500 mW), and all specified electrical characteristics. Direct substitution in PCB designs and assembly processes is supported.

Q: What is the difference between the original 1N5250B and the 1N5250B TR PBFREE?

A: The primary differences are manufacturer (Central Semiconductor Corp versus SMC Diode Solutions), product status (active versus obsolete), and packaging format (Tape & Reel versus bulk). The substitute includes RoHS3 compliance certification and an extended operating temperature range. All electrical specifications are identical.

Q: Does the Tape & Reel packaging affect compatibility?

A: No. Tape & Reel is a standard packaging format for automated assembly operations. The component itself remains identical. For applications requiring bulk packaging, the substitute part can be sourced through component distributors in alternative packaging formats.

Q: Are there any temperature performance differences?

A: The substitute part specifies an operating temperature range of -65°C to 200°C, compared to the original part's 200°C maximum. This extended lower temperature limit provides additional thermal margin. Both parts maintain identical performance at the maximum operating temperature.

Q: What compliance certifications does the substitute carry?

A: The 1N5250B TR PBFREE is RoHS3 compliant and maintains REACH Unaffected status. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications for export and tariff purposes.

Q: Is the reverse leakage current specification identical?

A: The specifications are equivalent. The original part specifies 100 nA @ 14.3 V, while the substitute specifies 100 nA @ 14 V. Both measurements are within the same leakage performance envelope and do not affect circuit functionality.

Q: Why should I use the substitute instead of the original part?

A: The original 1N5250B is classified as obsolete, creating long-term supply and availability risks. The substitute maintains active manufacturing status, ensuring reliable procurement for current and future production. Additionally, the substitute's RoHS3 compliance aligns with current regulatory requirements and industry standards.