1N4119-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4119-TP is a 28 V, 500 mW Zener diode manufactured by Micro Commercial Co in a DO-35 axial through-hole package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The 1N4119-TP maintains ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial applications requiring stable voltage regulation at 28 V nominal.

Substiute Parts

1N4119-TP

Micro Commercial CoIn Stock: 12391N4119-TP Datasheet

Current PartRFQ

1N5255B TR PBFREE

Central Semiconductor CorpIn Stock: 219251N5255B TR PBFREE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N4119-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Zener voltage nominal: 28 V
• Maximum power dissipation: 500 mW
• Zener voltage tolerance: ±5%
• Package type: DO-35 axial through-hole
• Forward voltage: 1.1 V maximum at 200 mA

Compliance Requirements:

• ROHS3 compliance status
• Moisture sensitivity level: 1 (Unlimited)

The 1N5255B TR PBFREE from Central Semiconductor Corp meets all critical electrical specifications and mechanical package requirements. This part is classified as active, ensuring long-term availability and supply chain continuity. Both parts share identical nominal zener voltage, power rating, tolerance, and forward voltage characteristics, establishing direct functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 1N5255B TR PBFREE is a direct functional equivalent to the 1N4119-TP for applications requiring a 28 V, 500 mW Zener diode in DO-35 axial through-hole configuration. Selection of the 1N5255B TR PBFREE is supported by the following factors:

Product Status: The 1N5255B TR PBFREE maintains active product status with 21,833 units in stock, ensuring reliable procurement and supply chain continuity. The 1N4119-TP is obsolete, making the substitute part the appropriate choice for new designs and ongoing production requirements.

Compliance Alignment: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), satisfying regulatory and environmental requirements for industrial and commercial applications.

Electrical Equivalence: Nominal zener voltage, power dissipation, tolerance, and forward voltage specifications are identical between the main part and substitute. The substitute part exhibits lower impedance (44 Ohms versus 200 Ohms), which provides improved voltage regulation stability. The main part exhibits lower reverse leakage current (10 nA versus 100 nA), a secondary parameter that does not affect primary circuit function in standard voltage regulation applications.

Temperature Operating Range: The 1N5255B TR PBFREE provides an extended operating temperature range (-65°C to 200°C) compared to the 1N4119-TP (175°C maximum junction temperature), offering greater flexibility for applications across diverse environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the 1N5255B TR PBFREE be used as a direct replacement for the 1N4119-TP in existing designs?

A: Yes. Both parts share identical nominal zener voltage (28 V), maximum power dissipation (500 mW), voltage tolerance (±5%), forward voltage (1.1 V @ 200 mA), and DO-35 axial through-hole package configuration. No circuit modifications are required for substitution.

Q: What is the significance of the impedance difference between the two parts?

A: The 1N5255B TR PBFREE exhibits lower impedance (44 Ohms) compared to the 1N4119-TP (200 Ohms). Lower impedance improves voltage regulation performance by reducing output impedance variation across the operating current range. This is a beneficial characteristic for voltage regulation applications.

Q: Does the higher reverse leakage current of the 1N5255B TR PBFREE affect circuit performance?

A: The reverse leakage current difference (100 nA versus 10 nA) is a secondary parameter that does not impact standard voltage regulation circuit function. Reverse leakage current becomes significant only in applications requiring extremely low standby current or high-impedance bias networks, which are not typical for 28 V Zener regulation circuits.

Q: Are both parts available in the same packaging format?

A: Yes. Both the 1N4119-TP and 1N5255B TR PBFREE are supplied in DO-35 axial through-hole packages with identical mechanical dimensions and lead configurations, enabling direct board-level substitution without layout modifications.

Q: What is the difference between the packaging designations "DO-35" and "DO-204AH"?

A: DO-35 and DO-204AH refer to the same physical package standard for axial through-hole diodes. DO-204AH is the formal JEDEC designation, while DO-35 is the legacy industry designation. Both terms describe identical mechanical and electrical package specifications.

Q: Why is the 1N4119-TP classified as obsolete?

A: Product obsolescence typically results from manufacturer discontinuation decisions based on market demand, manufacturing efficiency, or product line consolidation. The 1N5255B TR PBFREE provides equivalent electrical and mechanical functionality with active manufacturing status, making it the appropriate selection for ongoing applications.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The 1N5255B TR PBFREE includes REACH Unaffected status, confirming compliance with European chemical substance regulations. Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.