1N5260B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5260B is a through-hole zener diode rated at 43 V nominal voltage 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 and mechanical compatibility while offering active product status and enhanced compliance certifications.

Substiute Parts

1N5260B

SMC Diode SolutionsIn Stock: 8861N5260B Datasheet

Current PartRFQ

1N5260B TR PBFREE

Central Semiconductor CorpIn Stock: 8071N5260B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5260B is based on electrical parameter equivalence and mechanical compatibility. The primary substitute, 1N5260B TR PBFREE (Central Semiconductor Corp), qualifies as a direct equivalent because it maintains all critical electrical specifications: 43 V nominal zener voltage, ±5% tolerance, 500 mW maximum power dissipation, 93 Ohms maximum impedance, 100 nA reverse leakage current, and 1.1 V maximum forward voltage. Both components utilize identical DO-35 axial through-hole packaging, ensuring mechanical interchangeability in existing circuit board layouts and assembly processes.

The substitute part differs in product status (active versus obsolete) and compliance certifications, providing enhanced supply chain continuity and regulatory compliance. The operating temperature range of the substitute extends to −65°C, compared to the original part's specification, offering broader environmental operating capability.

Parameter Comparison

Engineering Selection Recommendations

The 1N5260B TR PBFREE from Central Semiconductor Corp is the direct functional equivalent for applications currently utilizing the obsolete 1N5260B from SMC Diode Solutions. Selection of the substitute part is supported by the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match the original specification, including zener voltage, power rating, impedance, and leakage characteristics. The reverse leakage measurement point differs slightly (33 V versus 31 V), but the specified current value remains identical at 100 nA, confirming functional equivalence.

Mechanical Compatibility: Both components utilize the DO-35 axial through-hole package, enabling direct physical substitution without circuit board redesign or assembly process modification.

Product Status and Supply Chain: The substitute part maintains active product status, ensuring long-term availability and supply chain continuity. The original part's obsolete classification creates procurement risk and potential supply discontinuation.

Regulatory Compliance: The substitute part carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions. Both components maintain REACH Unaffected status and identical moisture sensitivity ratings.

Operating Temperature Range: The substitute part's extended operating temperature range (−65°C to 200°C) provides enhanced environmental capability compared to the original specification, supporting broader application deployment without thermal derating.

Frequently Asked Questions (FAQ)

Q: Can the 1N5260B TR PBFREE be used as a direct replacement for the 1N5260B in existing designs?

A: Yes. The substitute part maintains identical electrical specifications (43 V zener voltage, 500 mW power rating, 93 Ohms impedance, 100 nA reverse leakage, 1.1 V forward voltage) and uses the same DO-35 axial through-hole package. No circuit modifications or board redesign are required.

Q: What is the significance of the "TR PBFREE" designation in the substitute part number?

A: The "TR" designation indicates Tape & Reel packaging format, suitable for automated assembly processes. "PBFREE" indicates lead-free construction, compliant with ROHS3 environmental regulations. The electrical and mechanical specifications remain unchanged from the standard through-hole configuration.

Q: Are there any temperature-related differences between the original and substitute parts?

A: The substitute part specifies an operating temperature range of −65°C to 200°C, compared to the original part's 200°C specification. This represents an extended lower temperature limit, providing enhanced capability for cold-environment applications. The maximum operating temperature remains identical.

Q: Does the substitute part meet current regulatory requirements?

A: Yes. The 1N5260B TR PBFREE carries ROHS3 compliance certification and maintains REACH Unaffected status, meeting current environmental and hazardous substance regulations. The original part's compliance status was not specified.

Q: What is the difference in reverse leakage measurement conditions between the two parts?

A: The original part specifies 100 nA reverse leakage at 31 V, while the substitute specifies 100 nA at 33 V. Both measurements confirm identical leakage current performance within the specified voltage range, confirming functional equivalence.

Q: Is the substitute part suitable for both manual and automated assembly processes?

A: Yes. The substitute part is available in Tape & Reel packaging format, optimized for automated pick-and-place assembly. The DO-35 axial through-hole configuration also supports manual insertion and wave soldering processes.

Q: What inventory status should be considered when selecting between the original and substitute parts?

A: The original 1N5260B (obsolete status) has 823 pieces in stock, while the substitute 1N5260B TR PBFREE (active status) has 785 pieces available. For long-term design support and future procurement, the active substitute part is recommended to ensure continued availability beyond current inventory levels.