BAS70W-7 Equivalent & Substitute Parts

Part Overview

The BAS70W-7 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 70 V DC reverse voltage and 70 mA average rectified current in a surface mount SOT-323 package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with variations in packaging, manufacturer, or performance characteristics.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io)	70	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA	—
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	100 nA @ 50 V	—
Capacitance @ Vr, F	2 pF @ 0V, 1MHz	—
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BAS70W-7 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 70 V
Current - Average Rectified (Io): 70 mA
Technology: Schottky
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 125°C minimum

Secondary Compatibility Factors:

Package / Case: SOT-323 (SC-70) preferred for direct mechanical compatibility
Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA
Reverse Recovery Time (trr): 5 ns
Current - Reverse Leakage @ Vr: 100 nA @ 50 V
Capacitance @ Vr, F: 2 pF @ 0V, 1MHz

Substitute parts are classified into the following categories:

Direct Manufacturer Substitutes: Identical electrical specifications and SOT-323 packaging from the original manufacturer (Diodes Incorporated), differing only in packaging format or compliance status.

Parametric Equivalents: Parts from alternative manufacturers meeting all core electrical parameters and SOT-323 packaging, with identical performance characteristics.

Upgrade Alternatives: Parts with identical core electrical ratings but different package types (SOT-523) or from alternative manufacturers, suitable for designs with package flexibility.

Manufacturer Recommended Alternatives: Parts from established manufacturers with equivalent or superior electrical performance, including options with different package types or enhanced specifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [nA]	Package	Product Status	RoHS Status
BAS70W-7	Diodes Incorporated	70	70	1 @ 15 mA	5	100 @ 50 V	SOT-323	Discontinued	Non-compliant
BAS70W-7-F	Diodes Incorporated	70	70	1 @ 15 mA	5	100 @ 50 V	SOT-323	Active	ROHS3 Compliant
BAS70WQ-7-F	Diodes Incorporated	70	70	1 @ 15 mA	5	100 @ 50 V	SOT-323	Active	ROHS3 Compliant
BAS70T-TP	Micro Commercial Co	70	70	1 @ 15 mA	5	100 @ 50 V	SOT-523	Active	ROHS3 Compliant
BAS70W,115	Nexperia USA Inc.	70	70	1 @ 15 mA	—	10 @ 70 V	SOT-323	Active	ROHS3 Compliant
MMBD770T1G	onsemi	70	200	—	—	—	SOT-323	Active	ROHS3 Compliant
BAS70E6327HTSA1	Infineon Technologies	70	70	1 @ 15 mA	100 ps	100 @ 50 V	SOT-23	Active	ROHS3 Compliant
BAS70E6433HTMA1	Infineon Technologies	70	70	1 @ 15 mA	100 ps	100 @ 50 V	SOT-23	Active	ROHS3 Compliant
BAS70WT-TP	Micro Commercial Co	70	70	1 @ 15 mA	5	100 @ 50 V	SOT-323	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Specifications and Packaging):

BAS70W-7-F (Diodes Incorporated) is the primary direct replacement. This part maintains identical electrical specifications, SOT-323 packaging, and mechanical compatibility with the original BAS70W-7. The primary distinction is product status (Active vs. Discontinued) and RoHS compliance (ROHS3 Compliant vs. Non-compliant). This part is recommended for applications requiring seamless integration into existing designs without layout modifications.

BAS70WT-TP (Micro Commercial Co) provides parametric equivalence with identical electrical performance and SOT-323 packaging. This part is suitable for designs where manufacturer flexibility is acceptable and RoHS3 compliance is required.

Automotive-Grade Alternative:

BAS70WQ-7-F (Diodes Incorporated) is qualified to AEC-Q101 automotive standards and maintains identical electrical specifications and SOT-323 packaging. This part is appropriate for automotive and high-reliability applications requiring formal qualification documentation.

Alternative Packaging Options:

BAS70T-TP (Micro Commercial Co) provides identical electrical specifications in SOT-523 packaging. This part is suitable for designs with package flexibility or where SOT-523 footprints are preferred.

BAS70E6327HTSA1 and BAS70E6433HTMA1 (Infineon Technologies) maintain identical electrical specifications in SOT-23 packaging. These parts are suitable for applications where SOT-23 footprints are available and package size reduction is beneficial.

Higher Current Rating Alternative:

MMBD770T1G (onsemi) provides 70 V reverse voltage rating with 200 mA maximum current capability in SOT-323 packaging. This part is suitable for applications requiring higher current capacity while maintaining the same voltage rating and package footprint.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and REACH unaffected, addressing regulatory requirements for new designs. The original BAS70W-7 is RoHS non-compliant and should be replaced in applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can BAS70W-7-F be used as a direct replacement for BAS70W-7?

A: Yes. BAS70W-7-F maintains identical electrical specifications (70 V, 70 mA, 1 V forward voltage, 5 ns recovery time) and SOT-323 packaging. The primary differences are product status (Active vs. Discontinued) and RoHS compliance (ROHS3 Compliant). No circuit modifications or layout changes are required.

Q: What is the difference between BAS70W-7-F and BAS70WQ-7-F?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications and SOT-323 packaging. BAS70WQ-7-F includes AEC-Q101 automotive qualification, making it suitable for automotive applications requiring formal qualification documentation. Electrical performance is equivalent.

Q: Can I use BAS70E6327HTSA1 or BAS70E6433HTMA1 as replacements?

A: These Infineon parts maintain identical electrical specifications (70 V, 70 mA, 1 V forward voltage) but use SOT-23 packaging instead of SOT-323. They are suitable only if your PCB layout accommodates SOT-23 footprints. The parts are not pin-compatible with SOT-323 packages.

Q: What is the advantage of MMBD770T1G?

A: MMBD770T1G provides the same 70 V reverse voltage rating and SOT-323 packaging as the original part but with a higher maximum current rating of 200 mA compared to 70 mA. This part is suitable for applications requiring higher current capacity. It is manufactured by onsemi and is ROHS3 compliant.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original BAS70W-7 is RoHS non-compliant. For applications subject to RoHS directives, any of the listed substitutes are appropriate.

Q: Can BAS70T-TP be used in place of BAS70W-7?

A: BAS70T-TP maintains identical electrical specifications but uses SOT-523 packaging instead of SOT-323. It is suitable only if your PCB layout accommodates SOT-523 footprints. The parts are not pin-compatible.

Q: What is the difference between BAS70E6327HTSA1 and BAS70E6433HTMA1?

A: Both parts are manufactured by Infineon Technologies with identical electrical specifications (70 V, 70 mA, 1 V forward voltage, 100 ps recovery time) and SOT-23 packaging. The difference lies in manufacturing date codes and internal qualification batches. Electrical performance is equivalent.

Q: Is BAS70WT-TP a suitable alternative?

A: Yes. BAS70WT-TP is manufactured by Micro Commercial Co and maintains identical electrical specifications and SOT-323 packaging. It is ROHS3 compliant and suitable for direct replacement in applications where manufacturer flexibility is acceptable.

Q: What parameters must remain constant for substitution?

A: The following parameters must remain constant: Voltage - DC Reverse (Vr) of 70 V, Current - Average Rectified (Io) of 70 mA, Technology (Schottky), Mounting Type (Surface Mount), and Operating Temperature Range (-55°C to 125°C minimum). Package type (SOT-323 vs. SOT-23 vs. SOT-523) may vary depending on PCB layout compatibility.

Q: Are there any performance differences between the substitute parts?

A: Minor differences exist in reverse leakage current and recovery time specifications. BAS70W,115 (Nexperia) specifies 10 µA reverse leakage at 70 V compared to 100 nA at 50 V for other parts. Infineon parts specify 100 ps recovery time compared to 5 ns for Diodes and Micro Commercial parts. These differences are within acceptable ranges for most applications but should be evaluated for noise-sensitive or high-frequency circuits.

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