DL4753A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL4753A-TP is a 36 V, 1 W Zener diode manufactured by Micro Commercial Co in MELF (DO-213AB) surface mount packaging. This component is classified as obsolete, indicating discontinued production and limited availability for new designs. The part maintains full RoHS3 compliance and REACH unaffected status. Due to its obsolete product status, identification of functionally equivalent substitute components is necessary for ongoing procurement, design continuity, and system maintenance applications.

Substiute Parts

DL4753A-TP

Micro Commercial CoIn Stock: 1081DL4753A-TP Datasheet

Current PartRFQ

SMAJ4753A-TP

Micro Commercial CoIn Stock: 6326SMAJ4753A-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DL4753A-TP is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 36 V nominal with ±5% tolerance
• Maximum power dissipation: 1 W
• Impedance (maximum): 50 Ohms
• Reverse leakage current: 5 µA @ 27.4 V
• Forward voltage: 1.2 V maximum

Mechanical and Compliance Criteria:

• Surface mount technology
• RoHS3 compliance
• Moisture sensitivity level 1 (unlimited)
• REACH unaffected status

The SMAJ4753A-TP qualifies as a direct electrical substitute, maintaining identical zener voltage, power rating, tolerance, impedance, and reverse leakage specifications. The primary distinction is packaging format: SMAJ4753A-TP uses DO-214AC (SMA) surface mount package instead of MELF (DO-213AB). Both packages are surface mount technologies suitable for automated assembly. The SMAJ4753A-TP is currently in active production status, providing superior availability compared to the obsolete DL4753A-TP.

Parameter Comparison

Engineering Selection Recommendations

SMAJ4753A-TP Selection Basis:

The SMAJ4753A-TP is the qualified substitute for DL4753A-TP applications based on the following engineering factors:

1. Electrical Equivalence: All critical electrical parameters match the original specification: 36 V zener voltage, 1 W power rating, ±5% tolerance, 50 Ohms maximum impedance, and 5 µA reverse leakage current. Forward voltage characteristics remain compatible within the specified operating conditions.

2. Thermal Compatibility: The SMAJ4753A-TP operating temperature range (-65°C to 150°C) encompasses the majority of industrial and commercial applications. The DL4753A-TP extended upper limit (175°C) applies only to specialized high-temperature designs; standard applications operate within the SMAJ4753A-TP range.

3. Compliance Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards.

4. Product Availability: SMAJ4753A-TP is in active production with 6,245 units in stock, compared to the obsolete DL4753A-TP with limited remaining inventory (1,032 units). Active production status ensures long-term procurement viability.

5. Package Consideration: The transition from MELF (DO-213AB) to SMA (DO-214AC) packaging requires PCB layout modification. Both are industry-standard surface mount packages with equivalent electrical performance and automated assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4753A-TP directly replace DL4753A-TP without circuit modification?

A: Electrical substitution is direct; all zener voltage, power, tolerance, impedance, and leakage specifications are identical. PCB layout modification is required due to different package geometries (MELF vs. SMA). Footprint redesign is necessary for physical mounting.

Q: What is the difference between MELF and SMA packaging?

A: MELF (DO-213AB) and SMA (DO-214AC) are both surface mount diode packages with different physical dimensions and land patterns. MELF packages are cylindrical with axial leads, while SMA packages are rectangular with end terminations. Both support automated assembly; PCB design must accommodate the specific package footprint.

Q: Are there temperature limitations when substituting SMAJ4753A-TP for DL4753A-TP?

A: The SMAJ4753A-TP maximum operating temperature is 150°C, compared to 175°C for DL4753A-TP. Applications requiring sustained operation above 150°C require the original DL4753A-TP or alternative high-temperature qualified components. Standard industrial applications operate within the SMAJ4753A-TP temperature range.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both DL4753A-TP and SMAJ4753A-TP are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and use.

Q: What is the forward voltage difference between the two parts?

A: DL4753A-TP specifies 1.2 V maximum @ 200 mA, while SMAJ4753A-TP specifies 1.2 V maximum @ 100 mA. Both maintain the same maximum forward voltage; the measurement current differs. This distinction does not affect zener diode operation in typical voltage regulation applications.

Q: Is SMAJ4753A-TP available in the same packaging format as DL4753A-TP?

A: No. SMAJ4753A-TP uses DO-214AC (SMA) packaging, while DL4753A-TP uses DO-213AB (MELF) packaging. Both are surface mount technologies; physical footprints differ and require separate PCB designs.

Q: Why is DL4753A-TP classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. SMAJ4753A-TP, with identical electrical specifications and active production status, provides continuity for new designs and ongoing procurement requirements.