DL4754A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL4754A-TP is a 39 V, 1 W surface mount zener diode manufactured by Micro Commercial Co in MELF (DO-213AB) package configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical performance across voltage regulation, power dissipation, and thermal operating ranges while accommodating alternative package formats where applicable.

Substiute Parts

DL4754A-TP

Micro Commercial CoIn Stock: 804DL4754A-TP Datasheet

Current PartRFQ

SMAJ4754A-TP

Micro Commercial CoIn Stock: 8483SMAJ4754A-TP Datasheet

SimilarRFQ

GLL4754A-E3/96

Vishay General Semiconductor - Diodes DivisionIn Stock: 1174GLL4754A-E3/96 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DL4754A-TP is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Zener voltage: 39 V nominal with ±5% tolerance
• Maximum power dissipation: 1 W
• Maximum impedance: 60 Ohms
• Reverse leakage current: 5 µA @ 29.7 V
• Forward voltage: 1.2 V maximum @ specified forward current

Mechanical & Environmental Compatibility:

• Surface mount mounting type
• Operating temperature range: minimum -65°C to 150°C (substitute parts operate within or exceed this range)
• RoHS3 compliance and MSL Level 1 classification

Package Considerations:

• Primary substitute maintains MELF (DO-213AB) package format for direct PCB layout compatibility
• Secondary substitute utilizes DO-214AC (SMA) package, requiring PCB footprint modification but maintaining electrical specifications

Substitutes are grouped by package type: MELF-packaged alternatives provide direct mechanical interchange, while SMA-packaged alternatives require design layout adjustment but deliver equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

GLL4754A-E3/96 (Vishay) is the primary recommended substitute for DL4754A-TP applications. This part maintains identical MELF (DO-213AB) package geometry, eliminating PCB layout modifications. Both components share equivalent electrical specifications across zener voltage, power rating, impedance, and reverse leakage parameters. GLL4754A-E3/96 carries active product status with full RoHS3 compliance and MSL Level 1 classification, ensuring long-term availability and supply chain stability.

SMAJ4754A-TP (Micro Commercial Co) serves as an alternative substitute when package format flexibility exists. This part delivers identical electrical performance but utilizes DO-214AC (SMA) package configuration, requiring PCB footprint redesign. SMAJ4754A-TP maintains active product status and full compliance certifications. Selection of this substitute is appropriate for new designs or redesign cycles where SMA package integration is feasible.

Both substitutes operate within the -65°C to 150°C temperature range, which encompasses the primary operating window of the obsolete DL4754A-TP. Applications requiring the full -65°C to 175°C range of the original part must confirm substitute performance at upper temperature limits through design validation.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4754A-TP directly replace DL4754A-TP on existing PCBs?

A: No. SMAJ4754A-TP uses DO-214AC (SMA) package while DL4754A-TP uses DO-213AB (MELF) package. These packages have different footprints and cannot be directly substituted without PCB modification. GLL4754A-E3/96 maintains the MELF package and provides direct PCB compatibility.

Q: What are the key electrical parameters that must match for zener diode substitution?

A: Zener voltage (39 V nominal), tolerance (±5%), maximum power dissipation (1 W), maximum impedance (60 Ohms), and reverse leakage current (5 µA @ 29.7 V) must remain constant. All listed substitutes meet these requirements.

Q: Are there temperature range differences between the main part and substitutes?

A: Yes. DL4754A-TP operates from -65°C to 175°C, while both SMAJ4754A-TP and GLL4754A-E3/96 operate from -65°C to 150°C. Applications requiring operation above 150°C must evaluate substitute performance through design testing.

Q: Do all parts carry the same compliance certifications?

A: Yes. DL4754A-TP, SMAJ4754A-TP, and GLL4754A-E3/96 are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity classification. REACH status is unaffected for all parts.

Q: What is the primary advantage of GLL4754A-E3/96 over SMAJ4754A-TP?

A: GLL4754A-E3/96 maintains the MELF package format of the original DL4754A-TP, eliminating PCB redesign requirements. Both parts deliver equivalent electrical performance and compliance certifications.

Q: Can forward voltage differences between substitutes affect circuit performance?

A: Forward voltage specifications differ between parts (DL4754A-TP: 1.2 V @ 200 mA; SMAJ4754A-TP: 1.2 V @ 100 mA; GLL4754A-E3/96: not specified). These parameters apply to forward-biased operation and do not affect zener regulation performance in reverse-biased applications. Circuit designs relying on forward conduction characteristics must confirm compatibility with the selected substitute.