BAS40-04-7 Equivalent & Substitute Parts

Part Overview

The BAS40-04-7 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 40 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount format. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 40 mA
Reverse Recovery Time (trr)	5 ns
Current - Reverse Leakage @ Vr	200 nA @ 30 V
Operating Temperature - Junction	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3

Substitute Part Grouping Explanation

Substitution of the BAS40-04-7 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Series Connection (mandatory)
Technology: Schottky (mandatory)
Voltage - DC Reverse (Vr) (Max): 40 V (mandatory)
Package / Case: TO-236-3, SC-59, SOT-23-3 (mandatory)
Mounting Type: Surface Mount (mandatory)

Secondary Compatibility Parameters:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 200 mA
Voltage - Forward (Vf) (Max) @ If: 1 V @ 40 mA or lower
Operating Temperature - Junction: Must encompass or exceed -55°C ~ 125°C range
Reverse Recovery Time (trr): 5 ns or faster
Current - Reverse Leakage @ Vr: 200 nA @ 30 V or lower

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications and active product status) and Manufacturer Recommended Alternatives (functionally compatible with minor parameter variations and active availability).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Operating)	Package	Product Status
BAS40-04-7	Diodes Incorporated	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Discontinued
BAS40-04-7-F	Diodes Incorporated	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Active
BAS40-04Q-13-F	Diodes Incorporated	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Active
BAS40-04Q-7-F	Diodes Incorporated	40 V	200 mA	1 V @ 40 mA	5 ns	200 nA @ 30 V	-55°C ~ 125°C	SOT-23-3	Active
BAS40-04,215	Nexperia USA Inc.	40 V	120 mA	1 V @ 40 mA	Not specified	10 µA @ 40 V	-55°C ~ 150°C	SOT-23-3	Active
BAS40-04,235	Nexperia USA Inc.	40 V	120 mA	1 V @ 40 mA	Not specified	10 µA @ 40 V	-55°C ~ 150°C	SOT-23-3	Active
BAS40-04LT1G	onsemi	40 V	120 mA	1 V @ 40 mA	Not specified	1 µA @ 25 V	-55°C ~ 150°C	SOT-23-3	Active
BAS4004E6327HTSA1	Infineon Technologies	40 V	120 mA	1 V @ 40 mA	100 ps	1 µA @ 30 V	-55°C ~ 150°C	SOT-23-3	Active
BAS4004E6433HTMA1	Infineon Technologies	40 V	120 mA	1 V @ 40 mA	100 ps	1 µA @ 30 V	-55°C ~ 150°C	SOT-23-3	Active
BAS40S_R1_00001	Panjit International Inc.	40 V	200 mA	1 V @ 40 mA	Not specified	1 µA @ 25 V	-55°C ~ 150°C	SOT-23-3	Active
BAT54SFILM	STMicroelectronics	40 V	300 mA	900 mV @ 100 mA	5 ns	1 µA @ 30 V	-40°C ~ 150°C	SOT-23-3	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

The following parts maintain identical electrical specifications to the BAS40-04-7 and are manufactured by Diodes Incorporated with active product status:

BAS40-04-7-F: Identical specifications with Cut Tape and Digi-Reel packaging. ROHS3 compliant. Highest inventory availability (122,400 pcs).
BAS40-04Q-7-F: Identical specifications with Tape & Reel packaging. ROHS3 compliant. Suitable for high-volume automated assembly (17,100 pcs available).
BAS40-04Q-13-F: Identical specifications with Tape & Reel packaging and AEC-Q101 automotive qualification. ROHS3 compliant. Recommended for automotive applications (1,051 pcs available).

Manufacturer Recommended Alternatives (Secondary Substitutes):

The following parts are functionally compatible with the BAS40-04-7 but operate at reduced current ratings (120 mA vs. 200 mA):

BAS40-04,215 (Nexperia): 120 mA rated current, AEC-Q100 automotive qualified, extended temperature range to 150°C. Cut Tape packaging (149,481 pcs).
BAS40-04,235 (Nexperia): 120 mA rated current, AEC-Q100 automotive qualified, extended temperature range to 150°C. Tape & Reel packaging (18,715 pcs).
BAS40-04LT1G (onsemi): 120 mA rated current, extended temperature range to 150°C. Cut Tape packaging (605,200 pcs).
BAS4004E6327HTSA1 (Infineon): 120 mA rated current, extended temperature range to 150°C, faster reverse recovery (100 ps). Cut Tape packaging (30,235 pcs).
BAS4004E6433HTMA1 (Infineon): 120 mA rated current, extended temperature range to 150°C, faster reverse recovery (100 ps). Tape & Reel packaging (33,288 pcs).

Higher Current Rated Alternative:

BAS40S_R1_00001 (Panjit): 200 mA rated current (matches original), extended temperature range to 150°C. Tape & Reel packaging (25,646 pcs).
BAT54SFILM (STMicroelectronics): 300 mA rated current (exceeds original), extended temperature range to 150°C. Cut Tape packaging (91,070 pcs). Forward voltage specified at 900 mV @ 100 mA.

Selection Criteria by Application:

For applications requiring exact electrical performance match: Select BAS40-04-7-F, BAS40-04Q-7-F, or BAS40-04Q-13-F.

For automotive applications: Select BAS40-04Q-13-F (AEC-Q101), BAS40-04,215, BAS40-04,235, or BAS4004E6327HTSA1/BAS4004E6433HTMA1 (AEC-Q100 qualified).

For applications with reduced current requirements (≤120 mA): Select from Nexperia, onsemi, or Infineon alternatives.

For applications requiring higher current margin (>200 mA): Select BAT54SFILM or BAS40S_R1_00001.

Frequently Asked Questions (FAQ)

Q: Can BAS40-04-7-F be used as a direct replacement for BAS40-04-7?

A: Yes. BAS40-04-7-F is a parametric equivalent with identical electrical specifications (40 V, 200 mA, 1 V forward voltage, 5 ns recovery time) and the same SOT-23-3 package. The primary difference is product status (active vs. discontinued) and packaging format (Cut Tape & Digi-Reel vs. standard packaging).

Q: What is the difference between BAS40-04Q-7-F and BAS40-04Q-13-F?

A: Both parts are parametrically identical with 40 V, 200 mA specifications and SOT-23-3 packaging. BAS40-04Q-13-F includes AEC-Q101 automotive qualification, making it suitable for automotive applications. Both use Tape & Reel packaging.

Q: Can I use BAS40-04,215 (120 mA) in place of BAS40-04-7 (200 mA)?

A: BAS40-04,215 is functionally compatible but rated for 120 mA average rectified current versus the original 200 mA. This part is suitable only for applications where the actual circuit current does not exceed 120 mA. The 40 V reverse voltage rating, forward voltage, and SOT-23-3 package are identical. Nexperia specifies AEC-Q100 automotive qualification.

Q: What are the packaging differences among the substitute parts?

A: Substitute parts are available in two packaging formats: Cut Tape (CT) & Digi-Reel and Tape & Reel (TR). Cut Tape packaging is suitable for manual assembly and small-quantity applications. Tape & Reel packaging is optimized for automated pick-and-place assembly in high-volume production. All parts use the same SOT-23-3 component footprint.

Q: Is BAT54SFILM a suitable substitute for BAS40-04-7?

A: BAT54SFILM is mechanically and electrically compatible with the BAS40-04-7 in the same SOT-23-3 package and 40 V rating. However, it is rated for 300 mA (exceeding the original 200 mA) and specifies forward voltage at 900 mV @ 100 mA rather than 1 V @ 40 mA. The operating temperature range extends to 150°C. This part is suitable for applications requiring higher current capacity or extended temperature operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed are RoHS3 compliant. The original BAS40-04-7 is RoHS non-compliant, making the active substitutes preferable for new designs and applications subject to RoHS requirements.

Q: What is the difference between Diodes Incorporated BAS40-04Q-7-F and Panjit BAS40S_R1_00001?

A: Both parts are rated for 40 V and 200 mA with SOT-23-3 packaging. Diodes Incorporated BAS40-04Q-7-F specifies 5 ns reverse recovery time and 200 nA leakage @ 30 V with operating temperature -55°C ~ 125°C. Panjit BAS40S_R1_00001 specifies 1 µA leakage @ 25 V with extended operating temperature -55°C ~ 150°C. Both are active products with RoHS3 compliance.

Q: Which substitute offers the best inventory availability?

A: onsemi BAS40-04LT1G offers the highest inventory (605,200 pcs), followed by Nexperia BAS40-04,215 (149,481 pcs) and STMicroelectronics BAT54SFILM (91,070 pcs). For exact parametric matches at 200 mA, Diodes Incorporated BAS40-04-7-F provides 122,400 pcs.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All substitute parts meet the same electrical specifications for the primary application parameters (40 V reverse voltage, SOT-23-3 package, Schottky technology, 1 Pair Series Connection). However, minor variations in leakage current, forward voltage measurement conditions, and temperature ranges exist. For critical applications, maintain consistency with a single manufacturer's part number throughout the design.

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