DB2S30800L Equivalent & Substitute Parts

Part Overview

The DB2S30800L is a Schottky diode manufactured by Panasonic Electronic Components, rated for 30 V DC reverse voltage and 100 mA average rectified current in a surface mount SSMini2-F5-B package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. Equivalent parts must maintain compatibility with the original electrical specifications and mechanical package constraints while considering current product availability and manufacturing status.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	100	mA
Voltage - Forward (Vf) (Max) @ If	420 mV @ 100 mA	—
Reverse Recovery Time (trr)	1.3	ns
Current - Reverse Leakage @ Vr	120 µA @ 30 V	—
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
Operating Temperature - Junction (Max)	125	°C
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DB2S30800L is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 30 V minimum
Mounting Type: Surface Mount
Package / Case: SC-79 or SOD-523
Technology: Schottky or Super Barrier (functionally equivalent rectification characteristics)
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Current Rating Considerations: Substitute parts are grouped into two categories based on average rectified current (Io):

Direct Current Rating Match (100 mA): Parts with Io = 100 mA provide identical current handling capacity and are preferred for direct replacement in existing designs.
Higher Current Rating (200 mA): Parts with Io = 200 mA exceed the original specification and are suitable for applications where the circuit can accommodate higher current capacity without adverse effects. These parts maintain all other critical parameters.
Lower Current Rating (30 mA): Parts with Io = 30 mA fall below the original specification and are not suitable substitutes for the DB2S30800L.

All substitute parts listed operate at a maximum junction temperature of 125°C or higher, matching or exceeding the original specification. Package compatibility is maintained across all recommended substitutes.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Product Status
DB2S30800L	Panasonic	30	100	420 @ 100 mA	1.3	120 @ 30 V	SOD-523	Discontinued
1PS79SB10,115	Nexperia USA Inc.	30	200	800 @ 100 mA	—	2 @ 25 V	SOD-523	Active
RB511SM-30FHT2R	Rohm Semiconductor	30	100	370 @ 10 mA	—	7 @ 10 V	SOD-523	Not For New Designs
RB511SM-30T2R	Rohm Semiconductor	30	100	370 @ 10 mA	—	7 @ 10 V	SOD-523	Active
RB520S30T1G	onsemi	30	200	600 @ 200 mA	—	1 @ 10 V	SOD-523	Active
RB751S40T5G	onsemi	30	30	370 @ 1 mA	—	0.5 @ 30 V	SOD-523	Active
SBAT54XV2T1G	onsemi	30	200	800 @ 100 mA	5	2 @ 25 V	SOD-523	Active
SBR0230T5-7	Diodes Incorporated	30	200	610 @ 200 mA	5	2 @ 30 V	SOD-523	Active

Engineering Selection Recommendations

Preferred Substitutes (100 mA Current Rating):

The RB511SM-30T2R (Rohm Semiconductor) is the primary recommended substitute. This part maintains the exact current rating of 100 mA, operates at 30 V maximum reverse voltage, and is in Active product status. The part is RoHS3 compliant and AEC-Q101 qualified, suitable for automotive applications. The lower forward voltage (370 mV @ 10 mA) compared to the original specification provides improved efficiency characteristics.

Alternative Substitutes (200 mA Current Rating):

For applications where higher current capacity is acceptable, three parts are available:

RB520S30T1G (onsemi): Active status, RoHS3 compliant, extended operating temperature range (-55°C to 150°C), lowest reverse leakage current (1 µA @ 10 V), and highest inventory availability (185,400 pcs).
1PS79SB10,115 (Nexperia USA Inc.): Active status, RoHS3 compliant, AEC-Q100 automotive qualified, with 46,834 pcs in stock.
SBAT54XV2T1G (onsemi): Active status, RoHS3 compliant, with specified reverse recovery time (5 ns) and 18,100 pcs in stock.
SBR0230T5-7 (Diodes Incorporated): Active status, RoHS3 compliant, Super Barrier technology, extended operating temperature range (-65°C to 150°C), with 1,517 pcs in stock.

Not Recommended:

RB751S40T5G (30 mA rating) does not meet the minimum current requirement of 100 mA and is unsuitable for direct substitution.

RB511SM-30FHT2R (Rohm Semiconductor) carries a "Not For New Designs" status and should not be selected for new applications despite matching the 100 mA current rating.

All recommended substitutes maintain SOD-523 package compatibility, RoHS compliance, and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the RB511SM-30T2R directly replace the DB2S30800L?

A: Yes. The RB511SM-30T2R matches the critical parameters: 30 V reverse voltage, 100 mA current rating, SOD-523 package, and 125°C maximum junction temperature. The part is in Active product status and RoHS3 compliant.

Q: What is the difference between 100 mA and 200 mA rated substitutes?

A: The 100 mA substitutes (RB511SM-30T2R) provide identical current handling capacity to the original part. The 200 mA substitutes (RB520S30T1G, 1PS79SB10,115, SBAT54XV2T1G, SBR0230T5-7) have higher current capacity and are suitable only if the circuit design can accommodate this increased rating without causing thermal or operational issues.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance.

Q: What is the significance of "Not For New Designs" status?

A: Parts marked "Not For New Designs" (such as RB511SM-30FHT2R) are in mature or declining production phases. While functionally equivalent, these parts should not be selected for new product designs due to potential future availability constraints. Active status parts are preferred for new applications.

Q: How do forward voltage specifications differ among substitutes?

A: Forward voltage varies based on measurement conditions. The original DB2S30800L specifies 420 mV @ 100 mA. Substitutes specify forward voltage at different current levels (e.g., 370 mV @ 10 mA for Rohm parts, 600 mV @ 200 mA for RB520S30T1G). These differences reflect different measurement conditions and do not indicate incompatibility; circuit performance depends on the specific operating current of the application.

Q: Is package compatibility guaranteed across all substitutes?

A: Yes. All recommended substitutes use the SOD-523 package (SC-79 case designation), which is mechanically and electrically compatible with the original SSMini2-F5-B package footprint.

Q: What is the difference between Schottky and Super Barrier technology?

A: Both are rectifier technologies suitable for this application. The SBR0230T5-7 uses Super Barrier technology, which provides similar rectification characteristics to Schottky diodes. Both technologies are functionally equivalent for the purposes of this substitution.

Q: Which substitute has the lowest reverse leakage current?

A: The RB520S30T1G has the lowest specified reverse leakage current at 1 µA @ 10 V, compared to the original part's 120 µA @ 30 V. Lower reverse leakage reduces standby power consumption in certain circuit topologies.

Q: Are automotive-qualified parts available?

A: Yes. The 1PS79SB10,115 (AEC-Q100 qualified) and RB511SM-30FHT2R (AEC-Q101 qualified) are automotive-grade substitutes. The RB520S30T1G, SBAT54XV2T1G, and SBR0230T5-7 are also suitable for automotive applications based on their RoHS3 compliance and active status, though specific automotive qualification is not listed in the provided data.

Q: What inventory levels are available for each substitute?

A: RB520S30T1G has the highest availability at 185,400 pcs. RB511SM-30FHT2R has 52,976 pcs, 1PS79SB10,115 has 46,834 pcs, SBAT54XV2T1G has 18,100 pcs, RB511SM-30T2R has 16,300 pcs, and SBR0230T5-7 has 1,517 pcs. Inventory levels should be verified with suppliers for current availability.

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