BAT30SFILM Equivalent & Substitute Parts

Part Overview

The BAT30SFILM is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair series connection with a maximum reverse voltage of 30 V and average rectified current of 300 mA per diode. The device is housed in a SOT-23-3 surface mount package and features fast recovery characteristics with a maximum forward voltage of 530 mV at 300 mA. The BAT30SFILM is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility within the specified parameter ranges while accommodating packaging and performance variations.

Key Parameters

Parameter	BAT30SFILM Value	Unit
Diode Configuration	1 Pair Series Connection	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io) (per Diode)	300	mA (DC)
Voltage - Forward (Vf) (Max) @ If	530 mV @ 300 mA	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 30 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BAT30SFILM are classified based on electrical parameter compatibility and packaging considerations. The primary substitution criteria are:

Electrical Compatibility Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 30 V
Current - Average Rectified (Io) (per Diode): Must equal or exceed 300 mA for direct substitution; parts rated at 200 mA represent reduced current capacity
Diode Configuration: Must maintain 1 Pair Series Connection topology
Technology: Schottky diode technology
Forward Voltage (Vf): Operational compatibility within circuit design margins
Speed Classification: Fast Recovery or Small Signal characteristics

Packaging Considerations:

Primary package: SOT-23-3 (TO-236-3, SC-59) for direct mechanical substitution
Alternative packages: SOD-523, SOT-323 for space-constrained applications with modified PCB layout

Compliance & Status:

RoHS3 Compliance: Required for regulatory alignment
Product Status: Active parts preferred over obsolete classifications
MSL Rating: Level 1 (Unlimited) for handling consistency

Substitutes are grouped into two categories: Direct Equivalents (matching 30 V / 300 mA specifications in SOT-23-3 package) and Functional Alternatives (meeting voltage requirements with reduced current ratings or alternative packages).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) [mV]	Package	Product Status	Speed
BAT30SFILM	STMicroelectronics	30	300	530 @ 300 mA	SOT-23-3	Obsolete	Fast Recovery ≤ 500ns
BAT30KFILM	STMicroelectronics	30	300	530 @ 300 mA	SOD-523	Active	Fast Recovery ≤ 500ns
BAT54SFILM	STMicroelectronics	40	300	900 @ 100 mA	SOT-23-3	Active	Fast Recovery ≤ 500ns
1SS374(TE85L,F)	Toshiba Semiconductor and Storage	10	100	500 @ 100 mA	SC-59	Active	Small Signal ≤ 200mA
BAS40-04-7-F	Diodes Incorporated	40	200	1000 @ 40 mA	SOT-23-3	Active	Small Signal ≤ 200mA
BAT54S-7-F	Diodes Incorporated	30	200	800 @ 100 mA	SOT-23-3	Active	Small Signal ≤ 200mA
BAT54SLT1G	onsemi	30	200	800 @ 100 mA	SOT-23-3	Active	Small Signal ≤ 200mA
BAT54STA	Diodes Incorporated	30	200	1000 @ 100 mA	SOT-23-3	Active	Small Signal ≤ 200mA
BAT54SWQ-7-F	Diodes Incorporated	30	200	1000 @ 100 mA	SOT-323	Active	Small Signal ≤ 200mA
BAT754S,215	NXP USA Inc.	30	200	600 @ 100 mA	SOT-23-3	Active	Small Signal ≤ 200mA

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

BAT30KFILM is the primary equivalent, offering identical electrical specifications (30 V / 300 mA) and matching forward voltage characteristics. The device transitions from SOT-23-3 to SOD-523 packaging, requiring PCB layout modification but maintaining electrical performance. Product status is Active, ensuring long-term availability and supply chain stability.

Same Voltage Rating, Reduced Current Capacity (200 mA):

BAT54SLT1G (onsemi), BAT54S-7-F (Diodes Incorporated), BAT54STA (Diodes Incorporated), and BAT754S,215 (NXP USA Inc.) all maintain the 30 V reverse voltage specification with 200 mA average rectified current per diode. These parts are suitable for applications where current requirements do not exceed 200 mA. All are Active products with SOT-23-3 packaging, enabling direct PCB footprint compatibility. Forward voltage characteristics vary between 600 mV and 1000 mV at 100 mA, requiring circuit margin verification.

Elevated Voltage Rating (40 V), Maintained Current Capacity:

BAT54SFILM (STMicroelectronics) provides 40 V reverse voltage with 300 mA current capacity in SOT-23-3 packaging. This part is suitable for applications requiring higher voltage headroom while maintaining the original current specification. Product status is Active.

Elevated Voltage Rating (40 V), Reduced Current Capacity (200 mA):

BAS40-04-7-F (Diodes Incorporated) offers 40 V reverse voltage with 200 mA current capacity in SOT-23-3 packaging. This configuration is appropriate for lower-current applications requiring enhanced voltage margin.

Alternative Package Consideration:

BAT54SWQ-7-F (Diodes Incorporated) provides 30 V / 200 mA specifications in SOT-323 (SC-70) packaging, suitable for space-constrained designs. This part includes AEC-Q101 automotive qualification and extended operating temperature range (-65°C to 125°C).

Not Recommended for Direct Substitution:

1SS374(TE85L,F) (Toshiba) operates at 10 V maximum reverse voltage and 100 mA current capacity, representing significant electrical derating unsuitable for 30 V / 300 mA applications.

All recommended substitutes maintain RoHS3 compliance and MSL Level 1 rating consistent with the original BAT30SFILM specification.

Frequently Asked Questions (FAQ)

Q: Can BAT30KFILM directly replace BAT30SFILM in existing designs?

A: BAT30KFILM provides identical electrical specifications (30 V / 300 mA, 530 mV forward voltage) and maintains Schottky technology with fast recovery characteristics. The primary difference is packaging: BAT30KFILM uses SOD-523 instead of SOT-23-3. Direct PCB footprint substitution is not possible; layout modification is required. Electrical performance is equivalent.

Q: What is the difference between BAT54SFILM and BAT30SFILM?

A: BAT54SFILM increases the maximum reverse voltage from 30 V to 40 V while maintaining 300 mA current capacity and SOT-23-3 packaging. Forward voltage increases to 900 mV at 100 mA compared to 530 mV for BAT30SFILM. BAT54SFILM is suitable for applications requiring higher voltage margin. Both devices use fast recovery technology.

Q: Can I use a 200 mA rated part (such as BAT54SLT1G) in place of the 300 mA BAT30SFILM?

A: Substitution is permissible only if circuit design ensures average rectified current does not exceed 200 mA per diode. The 200 mA rating represents a reduced current capacity specification. If the original design requires 300 mA operation, 200 mA alternatives will not provide adequate current handling and may result in thermal stress or device failure. Verify circuit current requirements before substitution.

Q: What is the significance of the SOT-323 package option (BAT54SWQ-7-F)?

A: SOT-323 (SC-70) is a smaller surface mount package compared to SOT-23-3 (SC-59), enabling space-constrained PCB layouts. BAT54SWQ-7-F maintains 30 V / 200 mA electrical specifications and includes AEC-Q101 automotive qualification. PCB footprint is not compatible with SOT-23-3 designs; layout redesign is required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, consistent with BAT30SFILM specifications and regulatory requirements.

Q: Which substitute offers the best forward voltage match to BAT30SFILM?

A: BAT30KFILM provides the closest forward voltage specification at 530 mV @ 300 mA, identical to BAT30SFILM. Among 200 mA alternatives, BAT754S,215 (NXP) offers 600 mV @ 100 mA, representing the lowest forward voltage option in that current class.

Q: Can BAT54SFILM be used in applications designed for 30 V operation?

A: Yes. BAT54SFILM operates at 40 V maximum reverse voltage, which exceeds the 30 V requirement. The device is suitable for 30 V applications and provides additional voltage margin. However, forward voltage increases to 900 mV at 100 mA, which may affect circuit performance depending on application requirements. Verify circuit design margins before substitution.

Q: What is the product status significance for long-term procurement?

A: BAT30SFILM is classified as Obsolete, indicating discontinued manufacturing and limited availability. All recommended substitutes are classified as Active, ensuring ongoing production, supply chain availability, and long-term design support. Active status is preferred for new designs and ongoing production requirements.

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