BAS70-04LT1 Equivalent & Substitute Parts

Part Overview

The BAS70-04LT1 is a Schottky diode array in a 1 Pair Series Connection configuration, rated for 70 V DC reverse voltage. Manufactured by onsemi, this component is packaged in the SOT-23-3 (TO-236-3, SC-59) surface mount package. The BAS70-04LT1 is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design and procurement requirements. Active alternatives with identical or enhanced electrical characteristics are available from multiple manufacturers.

Substiute Parts

BAS70-04LT1

onsemiIn Stock: 3553BAS70-04LT1 Datasheet

Current PartRFQ

BAS70-04LT1G

onsemiIn Stock: 29481BAS70-04LT1G Datasheet

DirectRFQ

BAS70-04-HE3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 3167BAS70-04-HE3-08 Datasheet

SimilarRFQ

BAS70-04-TP

Micro Commercial CoIn Stock: 5102BAS70-04-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS70-04LT1 is determined by strict equivalence in the following parameters:

Critical Matching Parameters:

• Diode Configuration: 1 Pair Series Connection
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 70 V
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Current - Average Rectified (Io) (per Diode): Substitute parts may have equal or higher current ratings
• Current - Reverse Leakage @ Vr: Substitute parts may have equal or lower leakage current
• Product Status: Active or Last Time Buy substitutes are acceptable for obsolete parts
• RoHS Compliance: ROHS3 Compliant substitutes are preferred over non-compliant originals

All identified substitute parts maintain the identical package footprint, voltage rating, and forward voltage characteristics, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BAS70-04LT1G (onsemi)

The BAS70-04LT1G is the direct equivalent from the original manufacturer. This part maintains identical electrical specifications including the 70 V reverse voltage rating, 1 V forward voltage at 15 mA, and 10 µA reverse leakage current. The BAS70-04LT1G is classified as Active with ROHS3 compliance, providing long-term availability and regulatory alignment. This part is the preferred selection for direct replacement in new designs and production runs.

Secondary Substitute: BAS70-04-TP (Micro Commercial Co)

The BAS70-04-TP is an active product with identical package and voltage specifications. This part is rated for 70 mA average rectified current and features ROHS3 compliance. The BAS70-04-TP is suitable for applications where the current requirement does not exceed 70 mA per diode. Operating temperature range extends from -55°C to 150°C, matching the BAS70-04LT1G specification.

Tertiary Substitute: BAS70-04-HE3-08 (Vishay General Semiconductor - Diodes Division)

The BAS70-04-HE3-08 is classified as Last Time Buy and carries automotive qualification (AEC-Q101). This part is rated for 200 mA average rectified current and features enhanced reverse leakage performance (100 nA @ 50 V). The BAS70-04-HE3-08 is suitable for applications requiring higher current capacity or automotive-grade reliability. ROHS3 compliance is confirmed.

All three substitute parts share identical package footprints and mounting characteristics, enabling direct PCB-level replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the BAS70-04LT1G directly replace the BAS70-04LT1 in existing designs?

A: Yes. The BAS70-04LT1G maintains identical electrical specifications for voltage rating (70 V), forward voltage (1 V @ 15 mA), and reverse leakage current (10 µA @ 70 V). The package footprint is identical (SOT-23-3). Direct substitution is supported without circuit modification.

Q: What is the difference between the three substitute parts?

A: The primary difference is the rated average rectified current per diode. The BAS70-04LT1G is rated for 100 mA, the BAS70-04-TP for 70 mA, and the BAS70-04-HE3-08 for 200 mA. All maintain the same 70 V reverse voltage and 1 V forward voltage specifications. Selection depends on the application's current requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BAS70-04LT1G, BAS70-04-TP, and BAS70-04-HE3-08 are all ROHS3 compliant. The original BAS70-04LT1 is RoHS non-compliant, making the substitutes preferable for new designs and regulatory compliance.

Q: What is the significance of the BAS70-04-HE3-08 being AEC-Q101 qualified?

A: AEC-Q101 qualification indicates automotive-grade reliability and testing. The BAS70-04-HE3-08 is suitable for automotive applications requiring enhanced reliability standards. This qualification is not present in the other substitute parts.

Q: Can I use the BAS70-04-HE3-08 in place of the BAS70-04-TP?

A: Yes. The BAS70-04-HE3-08 has a higher current rating (200 mA versus 70 mA) and lower reverse leakage current (100 nA @ 50 V versus 200 nA @ 50 V). It is electrically compatible and suitable for applications requiring higher current capacity or lower leakage performance.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original BAS70-04LT1 and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there any temperature rating differences between the substitutes?

A: The BAS70-04LT1G and BAS70-04-TP both specify -55°C to 150°C operating temperature range. The BAS70-04-HE3-08 specifies a maximum junction temperature of 125°C. For applications requiring the full -55°C to 150°C range, the BAS70-04LT1G or BAS70-04-TP are preferred.

Q: What packaging options are available for the substitutes?

A: The BAS70-04LT1G is available in Cut Tape (CT) and Digi-Reel packaging. The BAS70-04-TP and BAS70-04-HE3-08 are available in Tape & Reel (TR) packaging. All maintain the SOT-23-3 package specification.