BAS 40-05 B5003 Equivalent & Substitute Parts

Part Overview

The BAS 40-05 B5003 is a Schottky diode array manufactured by Infineon Technologies, configured as 1 pair common cathode with 40 V reverse voltage rating and 120 mA average rectified current per diode. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration with a maximum junction temperature of 150°C.

The BAS 40-05 B5003 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades. Active alternatives with identical or enhanced electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io) (per Diode)	120	mA (DC)
Voltage - Forward (Vf) (Max) @ If	1	V @ 40 mA
Reverse Recovery Time (trr)	100	ps
Current - Reverse Leakage @ Vr	1	µA @ 30 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAS 40-05 B5003 is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io) (per Diode): 120 mA minimum
Voltage - Forward (Vf) (Max) @ If: 1 V @ 40 mA or lower
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3 or SC-70, SOT-323

Substitute Categories:

Category 1: Direct Infineon Equivalents (Same Manufacturer, Active Status) Parts BAS4005E6433HTMA1 and BAS4005E6327HTSA1 are direct Infineon equivalents with identical electrical specifications and packaging. These parts differ only in packaging format (Cut Tape vs. Tape & Reel) and are fully interchangeable.

Category 2: Nexperia Cross-Manufacturer Equivalents (Same Electrical Specs, Different Manufacturer) Parts BAS40-05,215 and BAS40-05,235 from Nexperia USA Inc. maintain identical core electrical parameters. Reverse leakage current specification differs (10 µA @ 40 V vs. 1 µA @ 30 V), representing a minor relaxation acceptable for most applications.

Category 3: Package Variant Equivalents (Different Package, Enhanced Current Rating) Parts BAS40-05-7-F (Diodes Incorporated) and BAS40-05-TP (Micro Commercial Co) provide 200 mA current rating in SOT-23-3 package, exceeding the 120 mA requirement. These are pin-compatible upgrades with improved thermal performance.

Category 4: Smaller Package Equivalents (SOT-323 Package) Parts 1PS70SB45,115 (Nexperia) and BAS40-05W,115 (NXP Semiconductors) maintain 120 mA rating in SC-70, SOT-323 package. These are suitable for space-constrained applications requiring smaller footprint.

Category 5: Enhanced Performance Equivalents (Higher Current Rating, Improved Leakage) Parts BAT54CFILM and BAT54CWFILM (STMicroelectronics) provide 300 mA current rating with superior reverse leakage characteristics (1 µA @ 30 V) and faster recovery time (5 ns). Available in both SOT-23-3 and SOT-323 packages.

Parameter Comparison

Part Number	Manufacturer	Status	Vr (Max) V	Io (per Diode) mA	Vf (Max) V @ If	trr ps	Ir @ Vr µA	Package	Packaging Format
BAS 40-05 B5003	Infineon	Obsolete	40	120	1 @ 40 mA	100	1 @ 30 V	SOT-23-3	—
BAS4005E6433HTMA1	Infineon	Active	40	120	1 @ 40 mA	100	1 @ 30 V	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS4005E6327HTSA1	Infineon	Active	40	120	1 @ 40 mA	100	1 @ 30 V	SOT-23-3	Tape & Reel (TR)
BAS40-05,215	Nexperia	Active	40	120	1 @ 40 mA	—	10 @ 40 V	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS40-05,235	Nexperia	Active	40	120	1 @ 40 mA	—	10 @ 40 V	SOT-23-3	Tape & Reel (TR)
1PS70SB45,115	Nexperia	Active	40	120	1 @ 40 mA	—	10 @ 40 V	SOT-323	Tape & Reel (TR)
BAS40-05-7-F	Diodes Inc.	Active	40	200	1 @ 40 mA	5	0.2 @ 30 V	SOT-23-3	Tape & Reel (TR)
BAS40-05-TP	Micro Commercial	Active	40	200	1 @ 40 mA	5	0.2 @ 30 V	SOT-23-3	Tape & Reel (TR)
BAS40-05W,115	NXP Semi.	Active	40	120	1 @ 40 mA	—	10 @ 40 V	SOT-323	Bulk
BAT54CFILM	STMicro	Active	40	300	0.9 @ 100 mA	5	1 @ 30 V	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAT54CWFILM	STMicro	Active	40	300	0.9 @ 100 mA	5	1 @ 30 V	SOT-323	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition): BAS4005E6433HTMA1 and BAS4005E6327HTSA1 from Infineon Technologies are recommended as primary replacements. Both parts maintain identical electrical specifications and are ROHS3 compliant with active product status. Selection between these two depends on packaging format requirements: Cut Tape & Digi-Reel® for BAS4005E6433HTMA1 or Tape & Reel for BAS4005E6327HTSA1.

For Cross-Manufacturer Equivalents: BAS40-05,215 and BAS40-05,235 from Nexperia USA Inc. are functionally equivalent with ROHS3 compliance and active status. These parts are suitable for applications where manufacturer diversity is required. Reverse leakage current specification (10 µA @ 40 V) is higher than the original part but remains within acceptable limits for standard rectification applications.

For Enhanced Current Capacity: BAS40-05-7-F (Diodes Incorporated) and BAS40-05-TP (Micro Commercial Co) provide 200 mA current rating in the same SOT-23-3 package. These parts are suitable for designs requiring higher current handling or thermal margin improvement. Both are ROHS3 compliant and active.

For Space-Constrained Designs: 1PS70SB45,115 (Nexperia) and BAS40-05W,115 (NXP Semiconductors) offer SOT-323 package in 120 mA rating. The 1PS70SB45,115 includes AEC-Q100 automotive qualification. BAS40-05W,115 is available in bulk packaging with highest inventory availability (295,160 pcs).

For Maximum Performance Upgrade: BAT54CFILM and BAT54CWFILM from STMicroelectronics provide 300 mA current rating with superior reverse leakage (1 µA @ 30 V) and faster recovery time (5 ns). BAT54CFILM maintains SOT-23-3 package compatibility; BAT54CWFILM provides SOT-323 variant. Both are ROHS3 compliant and active.

Frequently Asked Questions (FAQ)

Q: Can BAS4005E6433HTMA1 directly replace BAS 40-05 B5003 without circuit modification?

A: Yes. BAS4005E6433HTMA1 is a direct Infineon equivalent with identical electrical specifications, diode configuration, voltage rating, current rating, forward voltage, and reverse recovery time. The part is pin-compatible in SOT-23-3 package. No circuit modification is required.

Q: What is the difference between BAS4005E6433HTMA1 and BAS4005E6327HTSA1?

A: Both parts are electrically identical Infineon equivalents. The difference is packaging format: BAS4005E6433HTMA1 is supplied in Cut Tape & Digi-Reel® format, while BAS4005E6327HTSA1 is supplied in Tape & Reel format. Selection depends on assembly line equipment compatibility and inventory management requirements.

Q: Why do Nexperia parts (BAS40-05,215 and BAS40-05,235) show higher reverse leakage current (10 µA @ 40 V)?

A: The reverse leakage specification difference (10 µA @ 40 V for Nexperia vs. 1 µA @ 30 V for Infineon) reflects different measurement conditions and manufacturer process tolerances. Both values are within acceptable limits for Schottky diode rectification applications. The Nexperia parts remain functionally equivalent for standard circuit operation.

Q: Are BAS40-05-7-F and BAS40-05-TP suitable replacements if my circuit only requires 120 mA?

A: Yes. BAS40-05-7-F and BAS40-05-TP provide 200 mA current rating in the same SOT-23-3 package, exceeding the 120 mA requirement. These parts are pin-compatible and electrically superior, offering improved thermal margin and faster recovery time (5 ns vs. 100 ps). No circuit modification is required.

Q: What is the advantage of using BAT54CFILM or BAT54CWFILM over the original BAS 40-05 B5003?

A: BAT54CFILM and BAT54CWFILM provide 300 mA current rating (2.5× the original 120 mA), superior reverse leakage characteristics (1 µA @ 30 V), and faster recovery time (5 ns). These parts are suitable for applications requiring higher current capacity, improved thermal performance, or enhanced switching speed. Both are ROHS3 compliant and active.

Q: Can I use BAS40-05W,115 (SOT-323) in a circuit designed for SOT-23-3 package?

A: No. SOT-323 and SOT-23-3 packages have different physical dimensions and pin layouts. BAS40-05W,115 requires PCB redesign with new footprint. However, BAS40-05W,115 maintains identical electrical specifications (40 V, 120 mA, 1 V forward voltage) and is suitable for new designs or redesigned boards requiring smaller package footprint.

Q: Which substitute part has the highest inventory availability?

A: BAS40-05W,115 from NXP Semiconductors has the highest inventory availability at 295,160 pcs in stock. This part is suitable for high-volume production requiring immediate availability and bulk packaging format.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original BAS 40-05 B5003 (obsolete) does not specify RoHS status. All recommended replacements meet current environmental compliance requirements.

Q: What is the difference between automotive-qualified (1PS70SB45,115) and standard industrial parts?

A: 1PS70SB45,115 includes AEC-Q100 automotive qualification, indicating compliance with automotive reliability and environmental stress testing standards. This part is suitable for automotive applications requiring qualification documentation. Standard industrial parts (BAS40-05W,115, BAS4005E6433HTMA1) are suitable for consumer and industrial applications without automotive qualification requirements.

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