BAT43WS-7 Equivalent & Substitute Parts

Part Overview

The BAT43WS-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 and production requirements. 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 BAT43WS-7 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io): 200 mA minimum
Package / Case: SC-76, SOD-323
Mounting Type: Surface Mount
Technology: Schottky

Acceptable Variation Parameters:

Voltage - Forward (Vf): Variations within typical application tolerances
Reverse Recovery Time (trr): 5 ns or faster
Current - Reverse Leakage @ Vr: Variations acceptable within circuit design margins
Operating Temperature - Junction: Extended ranges acceptable for most applications

Substitute parts are grouped into three categories:

Category 1 - Parametric Equivalents (Identical Electrical Specifications): Parts with matching 30 V, 200 mA ratings and identical forward voltage characteristics from Diodes Incorporated in active product status.

Category 2 - Functional Substitutes (Higher Current Rating): Parts rated for 30 V with current ratings exceeding 200 mA, suitable for applications with current margin requirements.

Category 3 - Cross-Manufacturer Equivalents (Different Manufacturers): Parts from alternative manufacturers meeting or exceeding the BAT43WS-7 electrical specifications with active product status and compliance certifications.

Parameter Comparison

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

Engineering Selection Recommendations

Primary Equivalent Selection:

BAT42WS-7-F and BAT43WS-7-F from Diodes Incorporated are direct parametric equivalents to the BAT43WS-7. Both parts maintain identical electrical specifications (30 V, 200 mA, 1 V forward voltage at 200 mA, 5 ns reverse recovery time) and are in active product status with ROHS3 compliance. These parts are recommended as first-choice replacements for discontinued BAT43WS-7 applications.

Cross-Manufacturer Equivalents:

BAT5403WE6327HTSA1 (Infineon Technologies) and 1PS76SB10,115 / 1PS76SB10,135 (Nexperia USA Inc.) provide equivalent 30 V, 200 mA performance with active product status and ROHS3 compliance. The Nexperia parts include AEC-Q101 automotive qualification. These options are suitable when supply chain diversification or automotive-grade components are required.

Higher Current Substitutes:

B0530WS-TP (Micro Commercial Co) and BAT54JFILM (STMicroelectronics) provide increased current ratings (500 mA and 300 mA respectively) while maintaining 30 V reverse voltage ratings. These parts are applicable in designs where current margin enhancement is beneficial. BAT54JFILM additionally provides 40 V reverse voltage rating.

Lower Current Alternatives:

BAT54WS-7-F (Diodes Incorporated), BAT43WS-TP (Micro Commercial Co), and BAT54WS-TP (Micro Commercial Co) are rated for 100 mA average rectified current. These parts are suitable for applications where the 200 mA rating of the original part exceeds circuit requirements.

Compliance and Availability:

All recommended substitute parts are ROHS3 compliant and in active product status. The BAT42WS-7-F and BAT43WS-7-F offer the highest inventory availability (10,200 and 95,100 units respectively) among parametric equivalents.

Frequently Asked Questions (FAQ)

Q: Can BAT42WS-7-F or BAT43WS-7-F be used as direct replacements for BAT43WS-7?

A: Yes. Both parts are parametric equivalents with identical 30 V reverse voltage, 200 mA current rating, 1 V forward voltage at 200 mA, and 5 ns reverse recovery time. Both are in active product status with ROHS3 compliance. The primary difference is product status; the original BAT43WS-7 is discontinued while the -F variants are active.

Q: What is the difference between BAT54WS-7-F and BAT43WS-7?

A: BAT54WS-7-F is rated for 100 mA average rectified current compared to the BAT43WS-7 rating of 200 mA. Both maintain 30 V reverse voltage and SOD-323 packaging. BAT54WS-7-F is suitable only for applications where circuit current requirements do not exceed 100 mA.

Q: Are the Nexperia 1PS76SB10 parts suitable replacements?

A: Yes. The 1PS76SB10,115 and 1PS76SB10,135 variants provide 30 V, 200 mA specifications matching the BAT43WS-7. Both include AEC-Q101 automotive qualification and ROHS3 compliance. The forward voltage is specified at 0.8 V @ 100 mA, which is lower than the BAT43WS-7 specification of 1 V @ 200 mA.

Q: Can BAT54JFILM from STMicroelectronics be used as a substitute?

A: BAT54JFILM can be used in applications where the increased 40 V reverse voltage and 300 mA current rating provide design benefits. However, this part exceeds the BAT43WS-7 specifications and should be selected only when these enhanced ratings are required or beneficial to circuit design margins.

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

A: Cut Tape (CT) and Digi-Reel® packaging is supplied in individual tape segments suitable for manual handling and smaller quantity orders. Tape & Reel (TR) packaging provides continuous reel format optimized for automated assembly equipment. Both formats contain identical components in SOD-323 packages; selection depends on assembly process requirements.

Q: Are there any temperature range differences between substitute parts?

A: Yes. The BAT43WS-7 operates from -55°C to 125°C junction temperature. BAT42WS-7-F and BAT43WS-7-F maintain this range. BAT54WS-7-F extends to -65°C to 150°C. BAT5403WE6327HTSA1 (Infineon) operates to 150°C maximum. Nexperia 1PS76SB10 parts specify 125°C maximum. Select based on application temperature requirements.

Q: Is RoHS compliance important for part selection?

A: The original BAT43WS-7 is RoHS non-compliant. All recommended substitute parts are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, ROHS3 compliant parts are mandatory. All active substitute parts listed meet this requirement.

Q: Can I use a higher current rated part like B0530WS-TP in place of BAT43WS-7?

A: Yes. B0530WS-TP is rated for 500 mA at 30 V, exceeding the BAT43WS-7 200 mA requirement. The part is pin-compatible in SOD-323 packaging and ROHS3 compliant. Higher current rating provides design margin but does not compromise functionality in circuits designed for 200 mA operation.

Q: What are the key parameters that determine substitutability?

A: The critical parameters are: (1) Voltage - DC Reverse (Vr) minimum 30 V, (2) Current - Average Rectified (Io) minimum 200 mA, (3) Package SC-76 SOD-323, (4) Mounting Type Surface Mount, and (5) Technology Schottky. Parts meeting or exceeding these specifications are functionally compatible. Forward voltage, reverse recovery time, and reverse leakage current variations are acceptable within typical circuit design tolerances.

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