BAS70W-04-7 Equivalent & Substitute Parts

Part Overview

The BAS70W-04-7 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 70 V DC reverse voltage and 70 mA average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in SC-70, SOT-323 surface mount form factor. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Series Connection	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io) (per Diode)	70	mA (DC)
Voltage - Forward (Vf) (Max) @ If	1	V @ 15 mA
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	100	nA @ 50 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAS70W-04-7 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Series Connection
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 70 V minimum
Current - Average Rectified (Io) (per Diode): 70 mA minimum
Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA or lower
Operating Temperature - Junction (Max): 150°C minimum
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Compatibility: Parts are grouped into two categories based on package form factor:

SC-70, SOT-323 Package (direct mechanical replacement)
TO-236-3, SC-59, SOT-23-3 Package (alternative package with different PCB footprint)

Secondary Considerations:

RoHS3 Compliance status
Reverse Recovery Time (trr) performance
Current - Reverse Leakage characteristics
Product Status (Active vs. Discontinued)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [nA/µA]	Package / Case	Product Status	RoHS Status
BAS70W-04-7	Diodes Incorporated	70	70	1 @ 15 mA	5	100 nA @ 50 V	SC-70, SOT-323	Discontinued	RoHS non-compliant
BAS70W-04-7-F	Diodes Incorporated	70	70	1 @ 15 mA	5	100 nA @ 50 V	SC-70, SOT-323	Active	ROHS3 Compliant
BAS70-04WFILM	STMicroelectronics	70	70	1 @ 15 mA	—	10 µA @ 70 V	SC-70, SOT-323	Active	ROHS3 Compliant
BAS7004WH6327XTSA1	Infineon Technologies	70	70	1 @ 15 mA	0.1	100 nA @ 50 V	SC-70, SOT-323	Active	ROHS3 Compliant
BAS70-04W,115	Nexperia USA Inc.	70	70	0.41 @ 1 mA	—	10 µA @ 70 V	SC-70, SOT-323	Active	ROHS3 Compliant
BAS7004E6327HTSA1	Infineon Technologies	70	70	1 @ 15 mA	0.1	100 nA @ 50 V	TO-236-3, SC-59, SOT-23-3	Active	ROHS3 Compliant
BAS7004E6433HTMA1	Infineon Technologies	70	70	1 @ 15 mA	0.1	100 nA @ 50 V	TO-236-3, SC-59, SOT-23-3	Active	ROHS3 Compliant
BAT54SWFILM	STMicroelectronics	40	300	0.9 @ 100 mA	5	1 µA @ 30 V	SC-70, SOT-323	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (SC-70, SOT-323 Package):

The BAS70W-04-7-F (Diodes Incorporated) is the primary equivalent, offering identical electrical specifications with active product status and ROHS3 compliance. This part provides a direct replacement with no design modifications required.

The BAS7004WH6327XTSA1 (Infineon Technologies) and BAS70-04W,115 (Nexperia USA Inc.) are functionally equivalent alternatives in the same package. The BAS70-04W,115 carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. All three alternatives are ROHS3 compliant and actively manufactured.

Alternative Package Options (TO-236-3, SC-59, SOT-23-3 Package):

The BAS7004E6327HTSA1 and BAS7004E6433HTMA1 (both Infineon Technologies) provide equivalent electrical performance in a different surface mount package. These parts require PCB layout modification due to different pin configuration and footprint. Both are ROHS3 compliant and actively produced.

Non-Equivalent Substitute:

The BAT54SWFILM (STMicroelectronics) does not meet substitution criteria. While packaged in SC-70, SOT-323, it specifies 40 V maximum reverse voltage and 300 mA average rectified current, exceeding the current rating but falling short of the voltage requirement. This part is suitable only for applications with different electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can BAS70W-04-7-F directly replace BAS70W-04-7 without design changes?

A: Yes. The BAS70W-04-7-F is a parametric equivalent with identical electrical specifications and the same SC-70, SOT-323 package. No PCB layout or schematic modifications are required. The primary difference is product status (Active vs. Discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between BAS70W-04-7-F and BAS70-04W,115?

A: Both parts meet the electrical specifications for the BAS70W-04-7. The BAS70-04W,115 (Nexperia) includes AEC-Q101 automotive qualification and specifies forward voltage at 1 mA (410 mV) rather than 15 mA. Selection depends on application requirements and automotive certification needs.

Q: Can I use BAS7004E6327HTSA1 or BAS7004E6433HTMA1 as replacements?

A: These parts are electrically equivalent but packaged in TO-236-3, SC-59, SOT-23-3 instead of SC-70, SOT-323. PCB footprint and pin layout differ, requiring design modification. Use only if PCB redesign is feasible or if the alternative package is already specified in the design.

Q: Why is BAT54SWFILM listed as a substitute if it does not meet specifications?

A: BAT54SWFILM is included because it was referenced in the original part's substitute list. However, it does not meet the BAS70W-04-7 electrical requirements. The 40 V reverse voltage rating is insufficient for 70 V applications. This part is suitable only for different circuit requirements.

Q: What does RoHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. The original BAS70W-04-7 is non-compliant. All recommended equivalents (BAS70W-04-7-F, BAS70-04WFILM, BAS7004WH6327XTSA1, BAS70-04W,115, and the BAS7004 variants) are ROHS3 compliant, suitable for applications requiring environmental compliance.

Q: What is the significance of reverse recovery time (trr) differences?

A: The original BAS70W-04-7 specifies 5 ns trr. Infineon alternatives (BAS7004WH6327XTSA1, BAS7004E6327HTSA1, BAS7004E6433HTMA1) specify 0.1 ns (100 ps), indicating faster switching performance. This improvement does not degrade compatibility; faster recovery time is beneficial in high-frequency switching applications.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Inventory levels vary significantly. BAS70-04W,115 (Nexperia) shows 98,471 pieces in stock, while BAS70W-04-7-F (Diodes) shows 9,200 pieces. Availability may influence selection for high-volume production requirements.

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