BAS40-04-13-F Equivalent & Substitute Parts

Part Overview

The BAS40-04-13-F is a Schottky diode array in a 1 Pair Series Connection configuration manufactured by Diodes Incorporated. This component is rated for 40 V DC reverse voltage with 200 mA average rectified current per diode and features fast recovery characteristics with a 5 ns reverse recovery time. The device is housed in a SOT-23-3 surface mount package.

The BAS40-04-13-F is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute components must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
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 to 125	°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

Substitution of the BAS40-04-13-F is determined by the following critical parameters:

Mandatory Compatibility Parameters:

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

Current Rating Considerations: Substitute parts are grouped based on average rectified current (Io) per diode. The BAS40-04-13-F operates at 200 mA. Substitutes with equal or higher current ratings maintain full compatibility. Substitutes with lower current ratings are suitable only for applications where the circuit current demand does not exceed the substitute part's rating.

Speed and Recovery Characteristics: The BAS40-04-13-F exhibits fast recovery characteristics (≤500 ns, >200 mA). Substitutes with small signal speed classifications are suitable for applications not requiring fast recovery performance.

Compliance and Status: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status. Active product status indicates current manufacturing availability and ongoing support.

Parameter Comparison

Parameter	BAS40-04-13-F (Main)	BAS40-04LT1G	BAT54SFILMY	CDBT-40S-G	RB706D-40T146
Manufacturer	Diodes Incorporated	onsemi	STMicroelectronics	Comchip Technology	Rohm Semiconductor
Product Status	Obsolete	Active	Active	Active	Active
Diode Configuration	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io) (per Diode)	200 mA	120 mA	300 mA	200 mA	15 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 40 mA	1 V @ 40 mA	900 mV @ 100 mA	1 V @ 40 mA	370 mV @ 1 mA
Reverse Recovery Time (trr)	5 ns	—	5 ns	5 ns	—
Current - Reverse Leakage @ Vr	200 nA @ 30 V	1 µA @ 25 V	1 µA @ 30 V	200 nA @ 30 V	1 µA @ 10 V
Operating Temperature - Junction	-55 to 125°C	-55 to 150°C	-40 to 150°C	Max 125°C	Max 125°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	—	—	AEC-Q101	—	—

Engineering Selection Recommendations

BAS40-04LT1G (onsemi)

This substitute is suitable for applications where the circuit current requirement does not exceed 120 mA per diode. The BAS40-04LT1G maintains the same 40 V reverse voltage rating, SOT-23-3 package, and Schottky technology. The part is active and widely available. The extended operating temperature range (-55 to 150°C) provides additional thermal margin compared to the obsolete BAS40-04-13-F. This substitute is recommended for low-to-moderate current applications.

BAT54SFILMY (STMicroelectronics)

This substitute provides 300 mA current rating, exceeding the BAS40-04-13-F specification. The BAT54SFILMY maintains 40 V reverse voltage, SOT-23-3 package, and Schottky technology with fast recovery characteristics (5 ns trr). The part carries AEC-Q101 automotive qualification and is active in production. This substitute is suitable for applications requiring equal or higher current capacity and is recommended for automotive or high-reliability applications.

CDBT-40S-G (Comchip Technology)

This substitute provides an exact current rating match at 200 mA per diode with identical 40 V reverse voltage and SOT-23-3 package. The CDBT-40S-G maintains Schottky technology and 5 ns reverse recovery time. The part is active and available. This substitute is recommended as a direct functional replacement for the BAS40-04-13-F in applications requiring equivalent electrical performance.

RB706D-40T146 (Rohm Semiconductor)

This substitute is rated for 15 mA per diode, significantly lower than the BAS40-04-13-F. The RB706D-40T146 maintains 40 V reverse voltage, SOT-23-3 package, and Schottky technology. This substitute is suitable only for low-current signal applications and is not recommended for applications requiring the full 200 mA current capacity of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use BAS40-04LT1G as a direct replacement for BAS40-04-13-F?

A: The BAS40-04LT1G is electrically compatible in terms of voltage rating and package, but the current rating is reduced to 120 mA per diode. Use this substitute only if your circuit current requirement does not exceed 120 mA per diode.

Q: What is the difference between the BAT54SFILMY and CDBT-40S-G substitutes?

A: Both parts maintain the 40 V voltage rating and SOT-23-3 package. The BAT54SFILMY provides 300 mA current capacity with automotive AEC-Q101 qualification, while the CDBT-40S-G provides 200 mA current capacity matching the original part. Select BAT54SFILMY for higher current applications or automotive requirements; select CDBT-40S-G for equivalent performance.

Q: Is the RB706D-40T146 suitable for my application?

A: The RB706D-40T146 is rated for only 15 mA per diode. This substitute is suitable only for low-current signal applications. If your circuit requires 200 mA or higher current capacity, this part is not appropriate.

Q: Are all substitute parts in the same package?

A: Yes, all substitute parts use the TO-236-3, SC-59, SOT-23-3 surface mount package. Pin-to-pin compatibility is maintained across all substitutes.

Q: Do all substitutes meet RoHS compliance?

A: Yes, all substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the BAS40-04-13-F.

Q: Which substitute should I choose for a new design?

A: For new designs, select based on your circuit current requirement. For 200 mA applications, CDBT-40S-G provides an exact functional match. For higher current applications, BAT54SFILMY is recommended. For automotive applications, BAT54SFILMY with AEC-Q101 qualification is the appropriate choice.

Q: What is the difference in forward voltage between these parts?

A: The BAS40-04-13-F, BAS40-04LT1G, and CDBT-40S-G all specify 1 V maximum forward voltage at 40 mA. The BAT54SFILMY specifies 900 mV at 100 mA, and the RB706D-40T146 specifies 370 mV at 1 mA. Forward voltage varies with current level; compare specifications at your operating current point.

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