Equivalent & Substitute Parts: DA24F4100L

Part Overview

The Panasonic DA24F4100L is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-128 package. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while accommodating the same physical package footprint.

Substiute Parts

DA24F4100L

Panasonic Electronic ComponentsIn Stock: 3410DA24F4100L Datasheet

Current PartRFQ

RF101LAM4STFTR

Rohm SemiconductorIn Stock: 3552RF101LAM4STFTR Datasheet

SimilarRFQ

RF101LAM4STR

Rohm SemiconductorIn Stock: 2420RF101LAM4STR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DA24F4100L are qualified based on the following electrical and mechanical criteria:

Primary Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 400 V
• Current - Average Rectified (Io): 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• Package / Case: SOD-128

Secondary Compatibility Parameters:

• Voltage - Forward (Vf) (Max) @ If: ≤ 1.25 V @ 1 A
• Current - Reverse Leakage @ Vr: ≤ 10 µA @ 400 V
• Operating Temperature - Junction: Maximum ≥ 150°C
• RoHS Compliance Status

The Rohm Semiconductor RF101LAM4STFTR and RF101LAM4STR meet all primary matching parameters and maintain electrical performance within acceptable tolerances for direct substitution. Both parts are classified as active products with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

RF101LAM4STFTR (Rohm Semiconductor) is the primary substitute for DA24F4100L. This part maintains all critical electrical parameters within specification and is classified as an active product with current inventory. The RF101LAM4STFTR carries AEC-Q101 automotive qualification and ROHS3 compliance, providing enhanced supply chain stability and regulatory alignment. Packaging is supplied in Cut Tape (CT) and Digi-Reel® formats.

RF101LAM4STR (Rohm Semiconductor) is an equivalent alternative to RF101LAM4STFTR with identical electrical specifications and SOD-128 package configuration. This part is also active and in stock. The primary distinction is packaging format (Cut Tape and Digi-Reel®) and the absence of automotive-grade qualification documentation in the provided data.

Both Rohm substitutes exhibit improved reverse recovery time (25 ns versus 45 ns), resulting in reduced switching losses and improved efficiency in rectification applications. Forward voltage specifications are marginally higher (1.25 V versus 1.2 V), representing a 4% increase that remains within typical circuit design tolerances for 400 V rectifier applications.

Frequently Asked Questions (FAQ)

Q: Can RF101LAM4STFTR and RF101LAM4STR be used interchangeably with DA24F4100L?

A: Yes. Both Rohm parts meet the electrical specifications of the discontinued Panasonic DA24F4100L across voltage rating, current capacity, speed classification, and package footprint. The SOD-128 surface mount package is identical, enabling direct PCB layout compatibility.

Q: What is the significance of the 20 ns difference in reverse recovery time?

A: The Rohm substitutes (25 ns trr) exhibit faster reverse recovery compared to the original DA24F4100L (45 ns trr). This improvement reduces reverse recovery charge and associated switching losses, typically resulting in lower power dissipation and improved thermal performance in high-frequency rectification circuits.

Q: Are there differences in forward voltage drop between the original and substitute parts?

A: The substitute parts specify a maximum forward voltage of 1.25 V @ 1 A, compared to 1.2 V @ 1 A for the DA24F4100L. This 0.05 V difference represents approximately 4% higher voltage drop. Circuit designs with tight voltage margin requirements should account for this specification variance during thermal and efficiency analysis.

Q: What is the difference between RF101LAM4STFTR and RF101LAM4STR?

A: Both parts are electrically identical with matching voltage, current, and thermal specifications. The RF101LAM4STFTR carries AEC-Q101 automotive qualification, indicating compliance with automotive reliability and quality standards. Selection between these variants depends on application requirements and supply chain preferences.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both RF101LAM4STFTR and RF101LAM4STR are ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions. The original DA24F4100L is RoHS compliant, ensuring regulatory continuity across substitution.

Q: Can these diodes be used in automotive applications?

A: The RF101LAM4STFTR carries AEC-Q101 automotive qualification. The RF101LAM4STR does not include automotive qualification documentation in the provided specifications. Application of either part in automotive systems should be evaluated against specific design and certification requirements.

Q: What packaging formats are available for the substitute parts?

A: Both Rohm substitutes are supplied in Cut Tape (CT) and Digi-Reel® packaging formats, standard for surface mount component distribution and automated assembly processes.