1N5246B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5246B-TP is a 16 V, 500 mW Zener diode manufactured by Micro Commercial Co in a DO-35 through-hole package. This component is classified as obsolete, indicating discontinued production and limited availability from original sources. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure project completion when original stock becomes depleted.

Substiute Parts

1N5246B-TP

Micro Commercial CoIn Stock: 8301N5246B-TP Datasheet

Current PartRFQ

1N5246B

Microchip TechnologyIn Stock: 33901N5246B Datasheet

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1N5246B

Microchip TechnologyIn Stock: 33901N5246B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5246B-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Zener voltage: 16 V nominal
• Power dissipation rating: 500 mW
• Voltage tolerance: ±5%
• Impedance (Max): 17 Ohms
• Reverse leakage current: 100 nA @ 12 V
• Package type: DO-35 (DO-204AH) through-hole axial configuration
• Mounting type: Through Hole

Substitute parts must maintain identical electrical specifications within the defined tolerances and use the same physical package to ensure direct board-level compatibility without circuit modification or mechanical rework.

Parameter Comparison

Engineering Selection Recommendations

The 1N5246B manufactured by Microchip Technology is electrically and mechanically equivalent to the 1N5246B-TP and serves as a direct substitute. Both parts share identical zener voltage, power rating, impedance, and reverse leakage specifications. The Microchip variant features an extended operating temperature range (-65°C to 175°C versus -55°C to 150°C) and remains in active production status, ensuring continued availability.

Compliance Considerations:

The original 1N5246B-TP is ROHS3 compliant, while the Microchip 1N5246B substitute is RoHS non-compliant. Applications subject to RoHS requirements must evaluate regulatory implications before substitution. Both parts are REACH unaffected and carry EAR99 export classification.

Forward Voltage Difference:

The substitute part exhibits a maximum forward voltage of 1.5 V @ 200 mA compared to 1.1 V @ 200 mA for the original part. This 0.4 V difference falls within acceptable circuit design margins for most applications but must be verified in forward-biased operating scenarios where forward voltage drop directly affects circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the Microchip 1N5246B directly replace the Micro Commercial Co 1N5246B-TP without circuit modification?

A: Yes. Both parts maintain identical zener voltage (16 V), power rating (500 mW), impedance (17 Ohms), and reverse leakage specifications. The DO-35 through-hole package is identical, enabling direct board-level substitution. The extended operating temperature range of the Microchip variant provides additional thermal margin in most applications.

Q: What is the significance of the 0.4 V forward voltage difference between the two parts?

A: The forward voltage difference (1.1 V versus 1.5 V @ 200 mA) affects performance only when the diode operates in forward-biased mode. In typical zener regulation applications, the diode operates in reverse-biased mode where forward voltage is not a factor. Forward-biased applications must evaluate whether the higher voltage drop introduces unacceptable circuit performance degradation.

Q: Does the RoHS non-compliance of the Microchip substitute affect substitution eligibility?

A: RoHS compliance status depends on application regulatory requirements. Products destined for European markets or applications subject to RoHS directives must maintain compliance. Applications without RoHS requirements can use the Microchip substitute without regulatory constraint. Compliance verification is necessary before final part selection.

Q: Are there any mechanical differences between the DO-35 packages of these two parts?

A: No. Both parts use identical DO-204AH (DO-35) axial through-hole packages. Physical dimensions, lead spacing, and mounting characteristics are equivalent, ensuring direct PCB compatibility without mechanical rework.

Q: Why is the original 1N5246B-TP classified as obsolete?

A: Obsolete status indicates the manufacturer (Micro Commercial Co) has discontinued production. The Microchip 1N5246B remains in active production, providing a viable long-term supply source for equivalent functionality.