1N5235 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5235 is a through-hole zener diode rated at 6.8 V nominal with 500 mW power dissipation in a DO-35 axial package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The 1N5235 was manufactured by SMC Diode Solutions and remains available in limited inventory. Active substitute parts maintain identical electrical specifications and package configuration, enabling direct replacement in existing circuit designs.

Substiute Parts

1N5235

SMC Diode SolutionsIn Stock: 22871N5235 Datasheet

Current PartRFQ

1N5235B TR PBFREE

Central Semiconductor CorpIn Stock: 91441N5235B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5235 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Zener voltage: 6.8 V nominal
• Power rating: 500 mW maximum
• Impedance: 5 Ohms maximum
• Reverse leakage current: 3 µA @ 5 V
• Forward voltage: 1.1 V maximum @ 200 mA
• Package type: DO-35 axial through-hole configuration

The 1N5235B TR PBFREE, manufactured by Central Semiconductor Corp, satisfies all electrical and mechanical requirements for direct substitution. This part is classified as active product status with RoHS3 compliance and expanded operating temperature range (-65°C to 200°C), providing enhanced availability and regulatory alignment compared to the obsolete 1N5235.

Parameter Comparison

Engineering Selection Recommendations

The 1N5235B TR PBFREE is the primary substitute for the obsolete 1N5235. This selection is based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match the original specification, including zener voltage (6.8 V), power dissipation (500 mW), impedance (5 Ohms maximum), and leakage characteristics. The ±5% tolerance specification on the substitute provides defined voltage accuracy.

Package Compatibility: Both parts utilize the DO-35 axial through-hole package, ensuring mechanical and electrical compatibility with existing PCB layouts and circuit designs without modification.

Product Status and Compliance: The 1N5235B TR PBFREE is classified as active product, ensuring long-term availability and supply chain continuity. RoHS3 compliance and REACH unaffected status satisfy current regulatory requirements for electronic component procurement.

Temperature Range: The substitute part specifies an expanded operating temperature range (-65°C to 200°C) compared to the original part, providing enhanced performance margin across industrial and commercial temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the 1N5235B TR PBFREE be used as a direct replacement for the 1N5235?

A: Yes. The 1N5235B TR PBFREE is electrically and mechanically equivalent to the 1N5235. All critical parameters—zener voltage, power rating, impedance, and leakage current—are identical. The DO-35 axial package configuration is unchanged, permitting direct substitution without circuit modification.

Q: What is the significance of the ±5% tolerance specification on the 1N5235B TR PBFREE?

A: The ±5% tolerance defines the acceptable range of zener voltage variation around the 6.8 V nominal value. This specification ensures the substitute part operates within defined voltage limits (6.46 V to 7.14 V). The original 1N5235 does not specify tolerance, making the substitute's defined tolerance a beneficial characteristic for circuit design precision.

Q: Are there differences in operating temperature between the two parts?

A: The 1N5235B TR PBFREE specifies an operating temperature range of -65°C to 200°C, while the original 1N5235 specifies a maximum of 200°C without a defined minimum. The substitute part's expanded lower temperature limit provides enhanced performance capability in cold environment applications.

Q: Does the RoHS3 compliance of the 1N5235B TR PBFREE affect circuit performance?

A: No. RoHS3 compliance indicates the substitute part is manufactured without restricted hazardous substances. This regulatory compliance does not alter electrical performance or circuit behavior. The compliance status ensures the part meets current environmental and procurement standards.

Q: Is the DO-35 package configuration identical between the original and substitute parts?

A: Yes. Both the 1N5235 and 1N5235B TR PBFREE use the DO-35 axial through-hole package (also designated DO-204AH). Package dimensions, lead configuration, and mounting method are identical, enabling direct PCB installation without layout modification.

Q: What is the inventory status difference between the original and substitute parts?

A: The original 1N5235 has 2200 pieces in stock but is classified as obsolete. The 1N5235B TR PBFREE has 9133 pieces in stock and is classified as active product. The substitute part provides superior long-term availability and supply chain reliability.