DL4735A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL4735A-TP is a 6.2 V, 1 W Zener diode manufactured by Micro Commercial Co in a Surface Mount MELF (DO-213AB) package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The part maintains ROHS3 compliance and operates across an extended temperature range of -65°C to 175°C. Substitute parts must maintain electrical equivalence in voltage regulation, power dissipation, and thermal performance while accommodating different package formats where applicable.

Substiute Parts

DL4735A-TP

Micro Commercial CoIn Stock: 690DL4735A-TP Datasheet

Current PartRFQ

SMAJ4735A-TP

Micro Commercial CoIn Stock: 35393SMAJ4735A-TP Datasheet

SimilarRFQ

1N4735AUR/TR

Microchip TechnologyIn Stock: 8061N4735AUR/TR Datasheet

Parametric EquivalentRFQ

CDLL3828A/TR

Microchip TechnologyIn Stock: 825CDLL3828A/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DL4735A-TP are selected based on strict electrical parameter equivalence. All identified substitutes maintain the following critical specifications:

Electrical Equivalence Criteria:

• Zener voltage: 6.2 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 1 W
• Maximum impedance: 2 Ohms
• Operating temperature range: -65°C minimum to 150°C or higher
• Surface mount configuration
• RoHS3 compliance

Package Considerations: Substitutes are grouped by package type. The primary substitute (SMAJ4735A-TP) uses DO-214AC (SMA) packaging, representing a common alternative format. Secondary substitutes (1N4735AUR/TR and CDLL3828A/TR) maintain the original DO-213AB MELF package format, providing direct mechanical compatibility.

Product Status: All identified substitutes carry Active product status, ensuring long-term availability and supply chain continuity compared to the obsolete DL4735A-TP.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Replacement (DO-213AB MELF):

The 1N4735AUR/TR and CDLL3828A/TR both provide mechanical and electrical compatibility with the original DL4735A-TP footprint. Both parts are manufactured by Microchip Technology and carry Active product status. The 1N4735AUR/TR maintains identical forward voltage specifications at 200 mA, matching the original part exactly. The CDLL3828A/TR demonstrates lower reverse leakage current (3 µA @ 1 V versus 10 µA @ 3 V), representing improved performance characteristics while maintaining all critical electrical parameters. Both support the full -65°C to 175°C operating temperature range.

For Alternative Package Format (DO-214AC SMA):

The SMAJ4735A-TP offers electrical equivalence with a different surface mount package (DO-214AC SMA). This part is also manufactured by Micro Commercial Co and carries Active status. The primary electrical difference is forward voltage specification at 100 mA rather than 200 mA. The operating temperature range extends to 150°C, which is 25°C lower than the original specification. This substitute is suitable for applications where the DO-214AC package is preferred or where PCB layout constraints favor the SMA format.

Compliance and Supply Continuity:

All three substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part. Active product status across all substitutes guarantees long-term availability and supply chain stability, eliminating obsolescence risk associated with the DL4735A-TP.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4735A-TP be used as a direct replacement for DL4735A-TP on existing PCBs?

A: No. The SMAJ4735A-TP uses DO-214AC (SMA) packaging while the DL4735A-TP uses DO-213AB (MELF) packaging. These packages have different footprints and cannot be used interchangeably on existing circuit boards without PCB redesign. For direct PCB compatibility, use 1N4735AUR/TR or CDLL3828A/TR.

Q: What is the difference between 1N4735AUR/TR and CDLL3828A/TR?

A: Both parts maintain identical zener voltage (6.2 V), power rating (1 W), and operating temperature range (-65°C to 175°C). The CDLL3828A/TR has lower reverse leakage current (3 µA @ 1 V) compared to 1N4735AUR/TR (10 µA @ 3 V). Both are manufactured by Microchip Technology and use the DO-213AB MELF package. Selection between these parts depends on application requirements for leakage current performance.

Q: Does the lower operating temperature maximum of SMAJ4735A-TP (150°C vs 175°C) affect compatibility?

A: The SMAJ4735A-TP operating temperature range of -65°C to 150°C is suitable for most commercial and industrial applications. If the application requires operation at temperatures between 150°C and 175°C, use 1N4735AUR/TR or CDLL3828A/TR instead. Verify actual operating conditions in your specific application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (SMAJ4735A-TP, 1N4735AUR/TR, and CDLL3828A/TR) are ROHS3 compliant and REACH unaffected, matching the compliance status of the original DL4735A-TP.

Q: What is the significance of the forward voltage specification difference in SMAJ4735A-TP?

A: The SMAJ4735A-TP specifies forward voltage at 100 mA (1.2 V @ 100 mA) while the original DL4735A-TP and other substitutes specify at 200 mA (1.2 V @ 200 mA). This reflects different measurement conditions rather than a functional difference. The maximum forward voltage remains 1.2 V in both cases.

Q: Can these parts be used in new designs?

A: Yes. All three substitute parts carry Active product status and are suitable for new design implementations. The 1N4735AUR/TR and CDLL3828A/TR provide the closest electrical and mechanical match to the original DL4735A-TP. The SMAJ4735A-TP is suitable for new designs where the DO-214AC package format is preferred.