BAS40-06 Equivalent & Substitute Parts

Part Overview

The BAS40-06 is a Schottky diode array manufactured by Diotec Semiconductor, configured as 1 pair common anode with a maximum reverse voltage of 40 V and average rectified current of 200 mA per diode. The device is housed in a SOT-23-3 surface mount package and is classified as Active product status. Substitute parts are necessary to address supply chain availability, manufacturing lead times, or specific application requirements such as automotive qualification or extended temperature range operation.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Anode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io) (per Diode)	200	mA
Voltage - Forward (Vf) (Max) @ If	1	V @ 40 mA
Reverse Recovery Time (trr)	5	ns
Operating Temperature - Junction	-50°C ~ 150°C	—
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BAS40-06 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Diode Configuration: 1 Pair Common Anode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io) (per Diode): 200 mA
Reverse Recovery Time (trr): 5 ns
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Specified at different test currents (40 mA or 200 mA) with maximum value of 1 V
Current - Reverse Leakage @ Vr: Measured at different voltages (25 V, 30 V, or 40 V) with values ranging from 10 µA to 500 nA
Operating Temperature - Junction: Extended ranges acceptable if minimum meets or exceeds -50°C and maximum meets or exceeds 150°C

All identified substitute parts maintain the core electrical and mechanical specifications required for direct functional replacement in applications designed for the BAS40-06.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) [V]	trr [ns]	Tj (Operating) [°C]	Package	Product Status	RoHS Status
BAS40-06	Diotec Semiconductor	40	200	1 @ 40 mA	5	-50 ~ 150	SOT-23-3	Active	Not applicable
BAS40-06 RFG	Taiwan Semiconductor Corporation	40	200	1 @ 40 mA	5	-65 ~ 125	SOT-23-3	Active	ROHS3 Compliant
BAS40-06-E3-08	Vishay General Semiconductor - Diodes Division	40	200	1 @ 40 mA	5	-40 ~ 125	SOT-23-3	Active	ROHS3 Compliant
BAS40-06-E3-18	Vishay General Semiconductor - Diodes Division	40	200	1 @ 40 mA	5	-40 ~ 125	SOT-23-3	Active	ROHS3 Compliant
BAS40-06-HE3-08	Vishay General Semiconductor - Diodes Division	40	200	1 @ 40 mA	5	-40 ~ 125	SOT-23-3	Last Time Buy	ROHS3 Compliant
BAS40-06HE3-TP	Micro Commercial Co	40	200	1 @ 40 mA	5	-55 ~ 125	SOT-23-3	Active	ROHS3 Compliant
CMPSH-3AE TR PBFREE	Central Semiconductor Corp	40	200	1 @ 200 mA	5	-65 ~ 150	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance):

BAS40-06 RFG (Taiwan Semiconductor Corporation) and BAS40-06HE3-TP (Micro Commercial Co) are recommended as primary substitutes. Both maintain Active product status and provide ROHS3 compliance. BAS40-06 RFG offers extended low-temperature operation to -65°C. BAS40-06HE3-TP includes AEC-Q101 automotive qualification and operates from -55°C to 125°C.

Secondary Substitutes (Active Status, Standard Industrial):

BAS40-06-E3-08 and BAS40-06-E3-18 (Vishay General Semiconductor - Diodes Division) are Active products with ROHS3 compliance suitable for standard industrial applications. Both operate within -40°C to 125°C temperature range.

Alternative Substitute (Extended Temperature Range):

CMPSH-3AE TR PBFREE (Central Semiconductor Corp) is an Active product offering the widest operating temperature range (-65°C to 150°C), matching the original BAS40-06 upper temperature limit. This part is suitable for applications requiring extended thermal performance.

Transitional Substitute (Last Time Buy Status):

BAS40-06-HE3-08 (Vishay General Semiconductor - Diodes Division) carries Last Time Buy status and includes AEC-Q101 automotive qualification. This part remains available but should not be selected for new designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can BAS40-06 substitutes be used interchangeably in existing designs?

A: Yes, all listed substitute parts maintain identical core electrical specifications (40 V reverse voltage, 200 mA average rectified current, 5 ns reverse recovery time) and the same SOT-23-3 package. Direct pin-for-pin replacement is supported without circuit modification.

Q: What is the difference between BAS40-06 and BAS40-06 RFG?

A: Both parts are Schottky diode arrays with identical electrical ratings and packaging. The primary difference is manufacturer (Diotec Semiconductor versus Taiwan Semiconductor Corporation) and operating temperature range (BAS40-06: -50°C to 150°C; BAS40-06 RFG: -65°C to 125°C). BAS40-06 RFG includes ROHS3 compliance.

Q: Are automotive-qualified versions available?

A: Yes. BAS40-06HE3-TP (Micro Commercial Co) and BAS40-06-HE3-08 (Vishay General Semiconductor - Diodes Division) both carry AEC-Q101 automotive qualification. These parts are suitable for automotive and high-reliability applications.

Q: What is the significance of the forward voltage specification difference in CMPSH-3AE TR PBFREE?

A: CMPSH-3AE TR PBFREE specifies forward voltage at 200 mA test current, whereas other parts specify at 40 mA. Both maintain the 1 V maximum specification, ensuring functional compatibility. The different test current reflects manufacturer characterization methodology and does not affect circuit performance.

Q: Which substitute offers the best long-term availability?

A: BAS40-06 RFG, BAS40-06-E3-08, BAS40-06-E3-18, BAS40-06HE3-TP, and CMPSH-3AE TR PBFREE all carry Active product status, indicating ongoing production and availability. BAS40-06-HE3-08 carries Last Time Buy status and should not be selected for new designs.

Q: Can I use a substitute with a lower maximum operating temperature?

A: Substitutes with lower maximum operating temperatures (125°C versus 150°C) are acceptable if the application does not require operation at temperatures above 125°C. Verify application thermal requirements before selection.

Q: Are all substitutes RoHS compliant?

A: All listed substitutes except the original BAS40-06 carry ROHS3 compliance. The original BAS40-06 lists RoHS status as Not applicable. All substitutes are lead-free and suitable for RoHS-regulated applications.

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