DL4741A-TP Equivalent & Substitute Parts

Part Overview

The DL4741A-TP is a Zener diode rated at 11 V with 1 W power dissipation, manufactured by Micro Commercial Co in a Surface Mount MELF package. This component is classified as obsolete, indicating that direct procurement may face availability constraints. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring 11 V Zener regulation in surface mount configurations.

Substiute Parts

DL4741A-TP

Micro Commercial CoIn Stock: 1135DL4741A-TP Datasheet

Current PartRFQ

SMAJ4741A-TP

Micro Commercial CoIn Stock: 1499SMAJ4741A-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DL4741A-TP is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 11 V nominal
• Tolerance: ±5%
• Power rating: 1 W maximum
• Impedance (Max): 8 Ohms
• Reverse leakage current: 5 µA @ 8.4 V

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• RoHS3 compliance required
• REACH unaffected status

Substitute parts must maintain identical electrical specifications while accommodating different package geometries. The SMAJ4741A-TP meets all electrical requirements and regulatory compliance standards, with the primary distinction being the package format change from MELF to DO-214AC (SMA).

Parameter Comparison

Engineering Selection Recommendations

The SMAJ4741A-TP serves as a direct electrical substitute for the DL4741A-TP. Both components are manufactured by Micro Commercial Co and maintain identical Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications. Both components carry ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The primary design consideration is the package format transition from MELF (DO-213AB) to SMA (DO-214AC). This change requires PCB layout modification, as the two packages have different footprints and lead configurations. The SMAJ4741A-TP is currently in active production status, ensuring long-term supply availability compared to the obsolete DL4741A-TP.

The operating temperature range of the substitute extends to 150°C maximum, compared to 175°C for the main part. Applications operating above 150°C require evaluation of thermal performance impact.

Frequently Asked Questions (FAQ)

Q: Can the SMAJ4741A-TP directly replace the DL4741A-TP without circuit modification?

A: Electrical substitution is valid. However, PCB layout modification is required due to package format differences. The MELF package (DL4741A-TP) and SMA package (SMAJ4741A-TP) have different footprints and cannot use identical PCB pads.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both components share identical Zener voltage (11 V), tolerance (±5%), power rating (1 W), impedance (8 Ohms maximum), and reverse leakage current (5 µA @ 8.4 V).

Q: What is the impact of the narrower operating temperature range on the substitute?

A: The SMAJ4741A-TP operates from -65°C to 150°C, while the DL4741A-TP operates to 175°C. Applications requiring operation above 150°C must evaluate thermal performance with the substitute part.

Q: Are both parts RoHS compliant?

A: Yes. Both the DL4741A-TP and SMAJ4741A-TP are ROHS3 compliant and REACH unaffected.

Q: Why is the DL4741A-TP marked as obsolete?

A: The DL4741A-TP is classified as obsolete, indicating discontinued production. The SMAJ4741A-TP in active production status provides equivalent electrical performance with assured supply availability.

Q: What packaging format does each part use?

A: The DL4741A-TP uses MELF (DO-213AB) surface mount packaging. The SMAJ4741A-TP uses SMA (DO-214AC) surface mount packaging. Both are surface mount technologies with different physical dimensions.