SD103BWS-7 Equivalent & Substitute Parts

Part Overview

The SD103BWS-7 is a Schottky rectifier diode rated for 30 V DC reverse voltage and 350 mA average rectified current in a surface mount SOD-323 package. Manufactured by Diodes Incorporated, this component is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	350	mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	mV @ mA
Reverse Recovery Time (trr)	10	ns
Current - Reverse Leakage @ Vr	5	µA @ 20 V
Capacitance @ Vr, F	28	pF @ 0V, 1MHz
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 125	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the SD103BWS-7 is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V minimum
Package / Case: SC-76, SOD-323
Mounting Type: Surface Mount
Technology: Schottky

Current Rating Considerations:

Primary equivalents maintain 350 mA average rectified current
Higher current-rated substitutes (500 mA) are acceptable for applications with lower current demands
Lower current-rated substitutes (200 mA) are acceptable only for applications requiring ≤200 mA

Forward Voltage Characteristics:

Forward voltage drop varies across substitute options and affects power dissipation
Reverse recovery time and leakage current specifications influence switching performance

Compliance & Availability:

Original part is discontinued; active alternatives ensure supply chain continuity
RoHS3 compliance and AEC-Q101/AEC-Q100 qualifications are available in substitute options

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [mV @ mA]	trr [ns]	Ir @ Vr [µA]	Product Status	RoHS Status
SD103BWS-7	Diodes Incorporated	30	350	600 @ 200	10	5 @ 20V	Discontinued	Non-compliant
SD103BWS-7-F	Diodes Incorporated	30	350	600 @ 200	10	5 @ 20V	Active	ROHS3 Compliant
SD103BWSQ-7-F	Diodes Incorporated	30	350	600 @ 200	10	5 @ 20V	Active	ROHS3 Compliant
1PS76SB10,115	Nexperia USA Inc.	30	200	800 @ 100	—	2 @ 25V	Active	ROHS3 Compliant
1PS76SB10,135	Nexperia USA Inc.	30	200	800 @ 100	—	2 @ 25V	Active	ROHS3 Compliant
B0530WS-TP	Micro Commercial Co	30	500	550 @ 500	—	300 @ 30V	Active	ROHS3 Compliant
BAT165E6327HTSA1	Infineon Technologies	40	750	740 @ 750	—	50 @ 40V	Active	ROHS3 Compliant
BAT48JFILM	STMicroelectronics	40	350	750 @ 200	—	25 @ 40V	Active	ROHS3 Compliant
BAT5403WE6327HTSA1	Infineon Technologies	30	200	800 @ 100	5	2 @ 25V	Active	ROHS3 Compliant
NSR0530HT1G	onsemi	30	500	620 @ 500	—	200 @ 30V	Active	ROHS3 Compliant
PMEG3005AEA,115	Nexperia USA Inc.	30	500	430 @ 500	—	150 @ 30V	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred):

SD103BWS-7-F and SD103BWSQ-7-F are direct parametric equivalents from Diodes Incorporated with identical electrical specifications. Both are active products with ROHS3 compliance. SD103BWSQ-7-F includes AEC-Q101 automotive qualification. These parts are recommended as primary replacements for the discontinued SD103BWS-7.

Current-Matched Alternatives (30 V, 350 mA):

BAT48JFILM from STMicroelectronics matches the 30 V reverse voltage and 350 mA current rating. This part operates at a higher maximum junction temperature (150°C) and includes ROHS3 compliance. Forward voltage is higher at 750 mV @ 200 mA compared to the original 600 mV specification.

Higher Current Capacity Substitutes (30 V, 500 mA):

B0530WS-TP, NSR0530HT1G, and PMEG3005AEA,115 all provide 30 V reverse voltage with 500 mA current capacity. These parts are suitable for applications where the original 350 mA rating provides insufficient margin. PMEG3005AEA,115 offers the lowest forward voltage drop at 430 mV @ 500 mA and includes AEC-Q100 automotive qualification.

Lower Current Alternatives (30 V, 200 mA):

1PS76SB10,115, 1PS76SB10,135, and BAT5403WE6327HTSA1 are rated for 200 mA maximum current. These parts are suitable only for applications with current requirements not exceeding 200 mA. All three include ROHS3 compliance and automotive qualifications.

Higher Voltage Alternatives (40 V):

BAT165E6327HTSA1 and BAT48JFILM provide 40 V reverse voltage rating with higher current capacity (750 mA and 350 mA respectively). These parts are suitable for applications requiring higher voltage margin while maintaining or exceeding the original current specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating than the original SD103BWS-7?

A: Yes. Parts rated for 40 V reverse voltage (BAT165E6327HTSA1, BAT48JFILM) are electrically compatible in circuits designed for 30 V operation. Higher voltage ratings provide additional safety margin and do not degrade circuit performance.

Q: What is the difference between SD103BWS-7-F and SD103BWSQ-7-F?

A: Both are parametric equivalents with identical electrical specifications. SD103BWSQ-7-F includes AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging. SD103BWS-7-F is the standard industrial version. Selection depends on application requirements and packaging preferences.

Q: Can I substitute a 200 mA rated diode for the 350 mA original part?

A: Only if your circuit operates at or below 200 mA average rectified current. Parts such as 1PS76SB10,115, 1PS76SB10,135, and BAT5403WE6327HTSA1 are suitable for lower-current applications. Exceeding the rated current causes excessive heat dissipation and component failure.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage drop directly affects power dissipation in the diode. Lower forward voltage (PMEG3005AEA,115 at 430 mV) reduces heat generation compared to higher forward voltage options (1PS76SB10 at 800 mV). Selection depends on thermal design constraints and efficiency requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant. The original SD103BWS-7 is RoHS non-compliant. Compliance is mandatory for new designs and many production environments.

Q: What packaging options are available for substitutes?

A: Substitute parts are supplied in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® packaging. All maintain the SOD-323 surface mount package format compatible with the original design. Packaging selection affects procurement and assembly processes but not electrical performance.

Q: Can I use NSR0530HT1G or PMEG3005AEA,115 as direct replacements for the SD103BWS-7?

A: These 500 mA rated parts are electrically compatible and provide higher current capacity. They are suitable for applications where the original 350 mA rating is insufficient or where additional design margin is required. Forward voltage characteristics differ and should be evaluated for thermal impact.

Q: What is the operating temperature range difference between the original and substitutes?

A: The original SD103BWS-7 operates from -65°C to 125°C. Most substitutes extend the maximum junction temperature to 150°C, providing improved thermal performance. This difference is beneficial for high-temperature applications but does not affect standard industrial operating ranges.

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