DL4730A-TP Equivalent & Substitute Parts

Part Overview

The DL4730A-TP is a Zener diode rated at 3.9 V with 1 W power dissipation capability, manufactured by Micro Commercial Co in a Surface Mount MELF package. This component functions as a voltage regulator and protective device in electronic circuits requiring stable reference voltage or overvoltage protection at the 3.9 V level.

The DL4730A-TP carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

DL4730A-TP

Micro Commercial CoIn Stock: 1242DL4730A-TP Datasheet

Current PartRFQ

CDLL3823A/TR

Microchip TechnologyIn Stock: 897CDLL3823A/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DL4730A-TP are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters:

• Zener voltage nominal rating: 3.9 V
• Tolerance specification: ±5%
• Maximum power dissipation: 1 W
• Maximum impedance: 9 Ohms
• Forward voltage maximum: 1.2 V @ 200 mA
• Operating temperature range: -65°C to 175°C

Mechanical Parameters:

• Mounting type: Surface Mount
• Package designation: DO-213AB or MELF
• Physical form factor compatibility

Compliance Parameters:

• RoHS3 compliance requirement
• REACH unaffected status
• ECCN classification: EAR99

Parts meeting all electrical specifications, mechanical compatibility, and regulatory compliance requirements are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The CDLL3823A/TR manufactured by Microchip Technology is a direct parametric equivalent to the obsolete DL4730A-TP. All critical electrical specifications match exactly: 3.9 V nominal zener voltage, ±5% tolerance, 1 W maximum power, 9 Ohms maximum impedance, and identical forward voltage characteristics.

The substitute part offers improved reverse leakage current performance (25 µA versus 50 µA at 1 V), representing enhanced device quality without compromising any specified parameter.

Both parts maintain identical mechanical compatibility through the DO-213AB/MELF surface mount package and identical operating temperature range of -65°C to 175°C. Compliance certifications are equivalent: both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99.

The CDLL3823A/TR carries Active product status, ensuring long-term availability and supply chain continuity compared to the Obsolete status of the original part. This substitute is suitable for direct replacement in all applications where the DL4730A-TP was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the CDLL3823A/TR replace the DL4730A-TP in existing designs?

A: Yes. The CDLL3823A/TR meets all electrical and mechanical specifications of the DL4730A-TP. Zener voltage, power rating, impedance, forward voltage, and operating temperature range are identical. Package compatibility is confirmed through identical DO-213AB/MELF designation.

Q: What is the difference in reverse leakage current between these parts?

A: The DL4730A-TP specifies 50 µA reverse leakage at 1 V, while the CDLL3823A/TR specifies 25 µA at 1 V. The substitute exhibits lower leakage, which is advantageous for applications requiring minimal standby current or improved voltage regulation stability.

Q: Are there packaging differences between these parts?

A: Both parts use identical Surface Mount packaging: DO-213AB/MELF. No PCB layout modifications or requalification is required for package compatibility.

Q: Why is the DL4730A-TP listed as Obsolete?

A: Obsolete status indicates the part is no longer manufactured by Micro Commercial Co. The CDLL3823A/TR, maintained in Active status by Microchip Technology, provides continued availability for this functional specification.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the DL4730A-TP and CDLL3823A/TR are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory compliance is equivalent.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -65°C to 175°C. No thermal performance differences exist between the main part and substitute.

Q: Is the CDLL3823A/TR available in the same packaging format?

A: Yes. The CDLL3823A/TR is supplied in Tape & Reel (TR) format in the DO-213AB/MELF package, compatible with automated assembly processes used for the original DL4730A-TP.