DB3J407K0L Equivalent & Substitute Parts

Part Overview

The DB3J407K0L is a Schottky diode manufactured by Panasonic Electronic Components, rated for 40 V DC reverse voltage and 500 mA average rectified current in a surface mount SMini3-F2-B package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production needs. The part is RoHS compliant with unlimited moisture sensitivity level (MSL 1) and features fast recovery characteristics with a 5 ns reverse recovery time.

Substiute Parts

DB3J407K0L

Panasonic Electronic ComponentsIn Stock: 44364DB3J407K0L Datasheet

Current PartRFQ

RB451UMTL

Rohm SemiconductorIn Stock: 952RB451UMTL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DB3J407K0L is determined by the following critical parameters:

Mandatory Matching Criteria:

• Technology: Schottky diode
• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Mounting Type: Surface Mount
• Package / Case: SC-85 compatible footprint
• Operating Temperature - Junction: 125°C maximum

Functional Compatibility Criteria:

• Current - Average Rectified (Io): Equal to or greater than 500 mA
• Voltage - Forward (Vf) (Max): Equal to or less than 550 mV at rated current
• Reverse Recovery Time (trr): Fast recovery characteristics
• Current - Reverse Leakage @ Vr: Controlled leakage performance

The RB451UMTL is identified as a substitute part based on matching voltage rating (40 V), Schottky technology, surface mount configuration, and SC-85 package compatibility. However, the RB451UMTL is rated for 100 mA average rectified current, which is below the 500 mA specification of the DB3J407K0L. This represents a current derating and requires circuit-level evaluation for suitability.

Parameter Comparison

Engineering Selection Recommendations

DB3J407K0L (Main Part): The DB3J407K0L is discontinued at DiGi Electronics. RoHS compliance and unlimited MSL rating support use in standard manufacturing environments. The 500 mA current rating and 5 ns reverse recovery time define the performance baseline for this application.

RB451UMTL (Substitute Part): The RB451UMTL is an active product from Rohm Semiconductor with ROHS3 compliance and equivalent MSL rating. The part maintains the 40 V voltage rating and SC-85 package footprint. The RB451UMTL is rated for 100 mA average rectified current, representing a 5:1 current derating relative to the DB3J407K0L. Forward voltage at rated current (450 mV @ 100 mA) is lower than the main part specification. Reverse leakage is comparable (90 µA @ 40 V versus 100 µA @ 35 V). Capacitance is reduced to 6 pF at 10 V, 1 MHz.

Substitution of RB451UMTL for DB3J407K0L is valid only in applications where the circuit current requirement does not exceed 100 mA. Applications requiring the full 500 mA rating require alternative sourcing or design modification.

Frequently Asked Questions (FAQ)

Q: Can the RB451UMTL directly replace the DB3J407K0L in all applications?

A: No. The RB451UMTL is rated for 100 mA average rectified current, while the DB3J407K0L is rated for 500 mA. Direct substitution is valid only in circuits where the actual operating current does not exceed 100 mA. Applications requiring 500 mA operation require alternative components or circuit redesign.

Q: Are the package footprints identical between DB3J407K0L and RB451UMTL?

A: Both parts use the SC-85 package case. The supplier device packages differ (SMini3-F2-B versus UMD3F), but both are SC-85 compatible surface mount packages. PCB layout compatibility should be verified against the specific package drawings.

Q: What is the difference in forward voltage between these parts?

A: The DB3J407K0L specifies 550 mV maximum forward voltage at 500 mA. The RB451UMTL specifies 450 mV maximum forward voltage at 100 mA. Forward voltage varies with current; direct comparison at different current levels is not applicable.

Q: Are both parts RoHS compliant?

A: Yes. The DB3J407K0L is RoHS compliant. The RB451UMTL is ROHS3 compliant. Both meet RoHS requirements.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

Q: Why is the reverse recovery time not specified for the RB451UMTL?

A: The reverse recovery time (trr) is not provided in the available specifications for the RB451UMTL. This parameter should be obtained from the Rohm Semiconductor datasheet if fast recovery characteristics are critical to circuit performance.

Q: Can I use the RB451UMTL in a high-frequency switching application?

A: The RB451UMTL is classified as small signal with speed ≤ 200 mA (Io), any speed. The DB3J407K0L is classified as fast recovery with ≤ 500 ns, > 200 mA (Io). These classifications indicate different switching speed characteristics. Application suitability depends on the specific frequency and switching requirements of the circuit.