1N4099-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4099-TP is a through-hole zener diode rated at 6.8 V nominal with 500 mW maximum power dissipation in a DO-35 axial package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts with matching electrical and mechanical specifications is necessary for design continuity and procurement planning.

Substiute Parts

1N4099-TP

Micro Commercial CoIn Stock: 10691N4099-TP Datasheet

Current PartRFQ

1N4099 TR PBFREE

Central Semiconductor CorpIn Stock: 8991N4099 TR PBFREE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N4099-TP are identified based on the following critical parameters that determine functional equivalence:

Matching Criteria:

• Zener voltage: 6.8 V nominal with ±5% tolerance
• Package type: DO-35 axial through-hole configuration
• Impedance: 200 Ohms maximum
• Reverse leakage current: 10 µA at specified reverse voltage
• Forward voltage: 1.1 V maximum at 200 mA
• RoHS3 compliance

Substitution Constraint: The 1N4099 TR PBFREE variant differs in maximum power rating (250 mW versus 500 mW) and operating temperature range. This difference must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

1N4099 TR PBFREE Substitution Assessment:

The 1N4099 TR PBFREE is an active product from Central Semiconductor Corp with identical zener voltage (6.8 V), tolerance (±5%), impedance (200 Ohms), and forward voltage characteristics. Both components are ROHS3 compliant and housed in DO-35 axial packages suitable for through-hole mounting.

The primary distinction is the maximum power rating: the substitute is rated at 250 mW compared to the original 500 mW specification. Applications requiring the full 500 mW dissipation capacity cannot use this substitute without thermal design modification. The substitute offers an extended operating temperature range (-65°C to 200°C) compared to the original (up to 175°C), providing broader environmental compatibility.

The 1N4099 TR PBFREE is available in active inventory (832 pieces) and represents a viable substitute for applications within its 250 mW power envelope.

Frequently Asked Questions (FAQ)

Q: Can the 1N4099 TR PBFREE directly replace the 1N4099-TP in all applications?

A: Direct replacement is possible only when the application power dissipation does not exceed 250 mW. The substitute has half the power rating of the original. Circuit analysis must confirm that the zener diode operates within this reduced power envelope.

Q: Are the zener voltage specifications identical between the main part and substitute?

A: Yes. Both components specify 6.8 V nominal zener voltage with ±5% tolerance. The reverse leakage current is 10 µA at comparable reverse voltages (5.17 V versus 5.2 V), representing negligible difference.

Q: What is the significance of the different operating temperature ranges?

A: The main part operates to 175°C junction temperature, while the substitute operates from -65°C to 200°C. The substitute provides a wider temperature window, particularly at the lower extreme. Applications operating at elevated temperatures near 175°C should confirm the substitute's performance at the upper limit of 200°C.

Q: Does the packaging differ between these parts?

A: No. Both components use DO-35 axial through-hole packages. Physical dimensions and PCB mounting characteristics are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1N4099-TP and 1N4099 TR PBFREE are ROHS3 compliant, meeting lead-free and hazardous substance restrictions.

Q: Why is the main part listed as obsolete?

A: The 1N4099-TP is classified as obsolete by the manufacturer. The 1N4099 TR PBFREE, produced by Central Semiconductor Corp, represents an active alternative with equivalent electrical characteristics within the specified power rating.