SD103BWS-7-F-79 Equivalent & Substitute Parts

Part Overview

The SD103BWS-7-F-79 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 30 V DC reverse voltage and 350 mA average rectified current in a surface mount SOD-123 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within allowable parameter variations.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	350	mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	—
Reverse Recovery Time (trr)	10	ns
Current - Reverse Leakage @ Vr	5 µA @ 20 V	—
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
Operating Temperature - Junction	-55°C ~ 150°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SD103BWS-7-F-79 is determined by equivalence in the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 350 mA
Voltage - Forward (Vf) (Max) @ If: 600 mV @ 200 mA
Reverse Recovery Time (trr): 10 ns
Current - Reverse Leakage @ Vr: 5 µA @ 20 V

Mechanical Equivalence Criteria:

Mounting Type: Surface Mount
Package / Case: SOD-123 (primary) or SOD-323 (with package transition)

Compliance Criteria:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: direct equivalents maintaining identical package specifications, and parametric equivalents with alternative package formats that preserve electrical performance within the specified parameter set.

Parameter Comparison

Parameter	SD103BWS-7-F-79 (Main)	SD103BWS-7-F (Substitute)	SD103BW-G3-08 (Substitute)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Vishay General Semiconductor - Diodes Division
Product Status	Obsolete	Active	Active
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V
Current - Average Rectified (Io)	350 mA	350 mA	350 mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	600 mV @ 200 mA	600 mV @ 200 mA
Reverse Recovery Time (trr)	10 ns	10 ns	10 ns
Current - Reverse Leakage @ Vr	5 µA @ 20 V	5 µA @ 20 V	5 µA @ 20 V
Capacitance @ Vr, F	28 pF @ 0V, 1MHz	28 pF @ 0V, 1MHz	50 pF @ 0V, 1MHz
Package / Case	SOD-123	SOD-323	SOD-123
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 125°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SD103BWS-7-F (Diodes Incorporated): This substitute maintains active product status with identical electrical parameters to the main part. The package transition from SOD-123 to SOD-323 requires PCB layout modification. Operating temperature range is reduced to -65°C ~ 125°C. This part is suitable for applications where the narrower temperature range is acceptable and PCB redesign is feasible. ROHS3 compliance and MSL-1 rating are maintained.

SD103BW-G3-08 (Vishay General Semiconductor - Diodes Division): This substitute is a parametric equivalent manufactured by an alternative supplier, maintaining the original SOD-123 package and operating temperature range (-55°C ~ 150°C). Capacitance specification differs at 50 pF versus 28 pF at 0V, 1MHz. This part is suitable for applications where package compatibility with the original design is required and the capacitance variation is within circuit tolerance. ROHS3 compliance and MSL-1 rating are maintained. Active product status ensures long-term availability.

Both substitutes satisfy the core electrical requirements: 30 V reverse voltage, 350 mA average rectified current, 600 mV forward voltage at 200 mA, 10 ns reverse recovery time, and 5 µA reverse leakage current at 20 V.

Frequently Asked Questions (FAQ)

Q: Can SD103BWS-7-F be used as a direct replacement for SD103BWS-7-F-79?

A: SD103BWS-7-F is electrically equivalent but uses SOD-323 packaging instead of SOD-123. Direct PCB substitution is not possible without layout modification. The operating temperature range is also reduced from -55°C ~ 150°C to -65°C ~ 125°C.

Q: What is the primary difference between SD103BW-G3-08 and the main part?

A: SD103BW-G3-08 maintains the original SOD-123 package and operating temperature range. The capacitance specification is 50 pF at 0V, 1MHz, compared to 28 pF for the main part. All other electrical parameters are identical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both SD103BWS-7-F and SD103BW-G3-08 are ROHS3 compliant with MSL-1 (Unlimited) moisture sensitivity rating, matching the main part specifications.

Q: Which substitute is recommended for direct PCB replacement?

A: SD103BW-G3-08 maintains the original SOD-123 package and requires no PCB layout changes. It is suitable for direct component substitution in existing designs.

Q: What is the impact of the capacitance difference in SD103BW-G3-08?

A: SD103BW-G3-08 has 50 pF capacitance versus 28 pF for the main part at 0V, 1MHz. The circuit design must accommodate this 22 pF increase. Capacitance impact is application-dependent and must be evaluated within the specific circuit context.

Q: Are there temperature range limitations with the substitutes?

A: SD103BWS-7-F operates at -65°C ~ 125°C, which is narrower than the main part (-55°C ~ 150°C). SD103BW-G3-08 maintains the original -55°C ~ 150°C range. Temperature range selection depends on application requirements.

Q: What is the product status of each substitute?

A: Both substitutes are Active products. SD103BWS-7-F-79 is Obsolete. Active status ensures continued manufacturing and availability of substitute parts.

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