BAT42WS-7 Equivalent & Substitute Parts

Part Overview

The BAT42WS-7 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 30 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-323 package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter ranges for the application.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	V
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	500 nA @ 25 V	nA
Capacitance @ Vr, F	10	pF @ 1V, 1MHz
Package / Case	SC-76, SOD-323	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the BAT42WS-7 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

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

Current Rating Considerations:

Primary equivalent: 200 mA average rectified current
Acceptable substitutes: 100 mA to 500 mA (lower ratings require application verification; higher ratings provide margin)

Electrical Performance Parameters:

Reverse Recovery Time (trr): 5 ns (small signal speed classification)
Forward Voltage (Vf): Variations acceptable within application tolerance
Reverse Leakage Current: Variations acceptable within application tolerance
Capacitance: 10 pF nominal

Compliance and Status:

RoHS3 compliance preferred for new designs
Active product status preferred for long-term availability
Automotive qualification (AEC-Q101) available for qualified applications

Substitute parts are grouped by equivalence level: parametric equivalents maintain all key specifications; manufacturer-recommended substitutes provide functional alternatives with acceptable parameter variations.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [V]	trr [ns]	Ir @ Vr [nA/µA]	Package	Status	RoHS
BAT42WS-7	Diodes Inc.	30	200	1 @ 200mA	5	500nA @ 25V	SOD-323	Discontinued	Non-compliant
BAT42WS-7-F	Diodes Inc.	30	200	1 @ 200mA	5	500nA @ 25V	SOD-323	Active	ROHS3
BAT43WS-7-F	Diodes Inc.	30	200	1 @ 200mA	5	500nA @ 25V	SOD-323	Active	ROHS3
BAT54WS-7-F	Diodes Inc.	30	100	1 @ 100mA	5	2µA @ 25V	SOD-323	Active	ROHS3
1PS76SB10,115	Nexperia USA	30	200	0.8 @ 100mA	—	2µA @ 25V	SOD-323	Active	ROHS3
1PS76SB10,135	Nexperia USA	30	200	0.8 @ 100mA	—	2µA @ 25V	SOD-323	Active	ROHS3
BAT54WS-TP	Micro Commercial Co	30	200	1 @ 100mA	5	2µA @ 25V	SOD-323	Active	ROHS3
BAT42WS-TP	Micro Commercial Co	30	100	1 @ 200mA	5	500nA @ 25V	SOD-323	Active	ROHS3
BAT5403WE6327HTSA1	Infineon Tech.	30	200	0.8 @ 100mA	5	2µA @ 25V	SOD-323	Active	ROHS3
B0530WS-TP	Micro Commercial Co	30	500	0.55 @ 500mA	—	300µA @ 30V	SOD-323	Active	ROHS3
BAT54JFILM	STMicroelectronics	40	300	0.9 @ 100mA	5	1µA @ 30V	SOD-323	Active	ROHS3

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

BAT42WS-7-F and BAT43WS-7-F are parametric equivalents to the BAT42WS-7, maintaining identical voltage, current, and switching characteristics. Both are manufactured by Diodes Incorporated with active product status and ROHS3 compliance. BAT42WS-7-F is available in Cut Tape and Digi-Reel packaging with 10,200 units in stock. BAT43WS-7-F is available in Cut Tape and Digi-Reel packaging with 95,100 units in stock. These parts are suitable for direct substitution in existing designs without circuit modification.

Manufacturer-Recommended Substitutes (Functional Alternatives):

1PS76SB10,115 and 1PS76SB10,135 (Nexperia USA Inc.) are manufacturer-recommended substitutes with 30 V reverse voltage and 200 mA current rating. Both carry AEC-Q101 automotive qualification and ROHS3 compliance. Forward voltage is specified at 0.8 V @ 100 mA, compared to 1 V @ 200 mA for the original part. Reverse leakage is 2 µA @ 25 V. These parts are suitable for applications requiring automotive-grade components.

BAT5403WE6327HTSA1 (Infineon Technologies) provides 30 V / 200 mA performance with 0.8 V forward voltage @ 100 mA and 2 µA reverse leakage @ 25 V. Operating temperature maximum is 150°C. This part is active with ROHS3 compliance and 19,016 units in stock.

BAT54WS-TP (Micro Commercial Co) is rated for 30 V / 200 mA with 1 V forward voltage @ 100 mA and 5 ns reverse recovery time. This part is active with ROHS3 compliance and 20,400 units in stock.

Higher Current Alternatives:

B0530WS-TP (Micro Commercial Co) provides 30 V / 500 mA capability with 0.55 V forward voltage @ 500 mA. This part is classified as fast recovery (≤500 ns, >200 mA) and is suitable for applications requiring higher current capacity. ROHS3 compliant with 3,300 units in stock.

BAT54JFILM (STMicroelectronics) is rated for 40 V / 300 mA with 0.9 V forward voltage @ 100 mA. This part provides higher voltage margin and is suitable for applications with elevated voltage requirements. ROHS3 compliant with 505,100 units in stock.

Lower Current Alternative:

BAT54WS-7-F (Diodes Incorporated) is rated for 30 V / 100 mA with 1 V forward voltage @ 100 mA. This part is suitable for applications with reduced current requirements. ROHS3 compliant with 305,300 units in stock.

BAT42WS-TP (Micro Commercial Co) is rated for 30 V / 100 mA with 1 V forward voltage @ 200 mA and 5 ns reverse recovery time. ROHS3 compliant with 3,200 units in stock.

Frequently Asked Questions (FAQ)

Q: Can BAT42WS-7-F be used as a direct replacement for BAT42WS-7?

A: Yes. BAT42WS-7-F is a parametric equivalent with identical voltage (30 V), current (200 mA), forward voltage (1 V @ 200 mA), and reverse recovery time (5 ns) specifications. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modification is required.

Q: What is the difference between BAT42WS-7-F and BAT43WS-7-F?

A: Both parts are parametric equivalents with identical electrical specifications: 30 V reverse voltage, 200 mA current rating, 1 V forward voltage @ 200 mA, and 5 ns reverse recovery time. The difference is in the base product number (BAT42 vs. BAT43), which reflects different manufacturing lines within Diodes Incorporated. Both are suitable for direct substitution.

Q: Can I use BAT54WS-7-F instead of BAT42WS-7?

A: BAT54WS-7-F has a reduced current rating of 100 mA compared to the 200 mA rating of BAT42WS-7. Substitution is acceptable only if the application circuit operates at or below 100 mA average rectified current. Forward voltage and reverse voltage specifications are compatible.

Q: What are the advantages of using 1PS76SB10,115 or 1PS76SB10,135?

A: These Nexperia parts carry AEC-Q101 automotive qualification, making them suitable for automotive applications. Both maintain 30 V / 200 mA specifications with lower forward voltage (0.8 V @ 100 mA) and lower reverse leakage (2 µA @ 25 V) compared to the original BAT42WS-7. ROHS3 compliance is provided.

Q: When should I consider B0530WS-TP?

A: B0530WS-TP is suitable when the application requires higher current capacity (500 mA vs. 200 mA). This part maintains 30 V reverse voltage compatibility and provides lower forward voltage (0.55 V @ 500 mA). Use this part only if the circuit design supports higher current operation.

Q: Is BAT54JFILM compatible with BAT42WS-7?

A: BAT54JFILM has a higher reverse voltage rating (40 V vs. 30 V) and higher current rating (300 mA vs. 200 mA). It is compatible from a functional standpoint and provides additional voltage margin. However, the higher reverse voltage rating is not required for 30 V applications. This part is suitable for applications with elevated voltage requirements or where higher current capacity is beneficial.

Q: Are all substitute parts available in SOD-323 packaging?

A: Yes. All listed substitute parts use SC-76 / SOD-323 surface mount packaging, ensuring mechanical and footprint compatibility with the original BAT42WS-7.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual handling and small-quantity applications. Tape & Reel packaging is supplied on continuous reels suitable for automated assembly equipment. Both formats contain the same component; packaging selection depends on assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry ROHS3 compliance. The original BAT42WS-7 is RoHS non-compliant. ROHS3-compliant alternatives are required for new designs and applications subject to RoHS regulations.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all selected parts meet the application's electrical requirements (voltage, current, switching speed). However, design consistency and supply chain management typically favor selecting a single part number for production.

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