DL5237B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL5237B-TP is a surface mount zener diode rated at 8.2 V nominal with 500 mW power dissipation, manufactured by Micro Commercial Co in Mini MELF packaging. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design support and procurement continuity. The part maintains ROHS3 compliance and operates across the temperature range of -65°C to 175°C, making it suitable for industrial and commercial applications requiring voltage regulation and transient protection.

Substiute Parts

DL5237B-TP

Micro Commercial CoIn Stock: 1033DL5237B-TP Datasheet

Current PartRFQ

DL5237B-TP

Micro Commercial CoIn Stock: 1033DL5237B-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DL5237B-TP is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Zener voltage: 8.2 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Maximum impedance: 8 Ohms
• Reverse leakage current: 3 µA @ 6.5 V
• Forward voltage: 1.1 V @ 200 mA

Physical & Environmental Specifications:

• Mounting type: Surface Mount
• Package designation: DO-213AC, MINI-MELF, SOD-80
• Operating temperature range: -65°C to 175°C
• Moisture sensitivity: MSL 1 (Unlimited)

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status

Substitute parts must match all electrical parameters within stated tolerances and maintain identical or superior environmental ratings. Package compatibility is mandatory for direct board-level substitution.

Parameter Comparison

Engineering Selection Recommendations

The DL5237B-TP is classified as obsolete. Direct substitution with equivalent parts requires confirmation of identical electrical and mechanical specifications as detailed in the parameter comparison table above.

Compliance Verification: All substitute components must maintain ROHS3 compliance and REACH unaffected status to ensure regulatory alignment with current manufacturing and distribution requirements.

Packaging Considerations: The Mini MELF package (DO-213AC, SOD-80) is a standard surface mount form factor. Substitutes must utilize identical packaging to ensure compatibility with existing printed circuit board layouts and automated assembly processes.

Electrical Performance: The 8.2 V zener voltage with ±5% tolerance, 500 mW power rating, and specified impedance characteristics define the functional performance envelope. Substitute parts must operate within these parameters to maintain circuit protection and voltage regulation functions.

Temperature Operating Range: The -65°C to 175°C operating range establishes the environmental limits for component selection. Substitute parts must support this full temperature span for applications requiring extended thermal performance.

Frequently Asked Questions (FAQ)

Q: What makes a part a valid substitute for the DL5237B-TP?

A: A valid substitute must match all electrical parameters: 8.2 V nominal zener voltage with ±5% tolerance, 500 mW maximum power dissipation, 8 Ohms maximum impedance, 3 µA reverse leakage current at 6.5 V, and 1.1 V forward voltage at 200 mA. The part must also be surface mount in DO-213AC/Mini MELF/SOD-80 packaging, operate across -65°C to 175°C, and maintain ROHS3 compliance.

Q: Can I use a different zener voltage rating as a substitute?

A: No. The zener voltage is a critical functional parameter. The 8.2 V nominal rating with ±5% tolerance is specific to this application. Substitutes with different voltage ratings will not provide equivalent circuit protection or voltage regulation performance.

Q: Is the Mini MELF package interchangeable with other surface mount packages?

A: The Mini MELF package (DO-213AC, SOD-80) is a specific form factor. While electrically equivalent parts may exist in different packages, they are not direct substitutes for board-level compatibility. Package selection must match the existing PCB footprint and assembly process.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance defines the acceptable variation in zener voltage from the 8.2 V nominal value. Substitute parts must maintain this same tolerance specification to ensure predictable circuit behavior and compliance with design specifications.

Q: Does the obsolete status affect the availability of substitutes?

A: The obsolete status indicates that the DL5237B-TP is no longer in active production. Equivalent substitutes with identical specifications may be available from the same or alternative manufacturers. Verification of current availability and compliance certifications is necessary for procurement planning.

Q: What role does the 500 mW power rating play in substitution?

A: The 500 mW power rating establishes the maximum thermal dissipation capability of the component. Substitutes must support this same power level to ensure safe operation under the circuit's maximum current and voltage conditions. Lower power ratings are not acceptable substitutes.

Q: Are there any compliance considerations for substitute selection?

A: Yes. All substitutes must maintain ROHS3 compliance and REACH unaffected status. These certifications ensure compliance with current environmental and regulatory requirements for manufacturing and distribution in regulated markets.