CDST-70-G Equivalent & Substitute Parts

Part Overview

The CDST-70-G is a general-purpose diode array manufactured by Comchip Technology, configured as a 1 Pair Common Cathode design rated for 70V DC reverse voltage and 200mA average rectified current per diode. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration.

The CDST-70-G carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

CDST-70-G

Comchip TechnologyIn Stock: 6313CDST-70-G Datasheet

Current PartRFQ

BAV70-HF

Comchip TechnologyIn Stock: 1976BAV70-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDST-70-G is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Diode Configuration: 1 Pair Common Cathode
• Voltage - DC Reverse (Vr) (Max): 70 V
• Current - Average Rectified (Io) (per Diode): 200 mA (DC)
• Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 150 mA
• Reverse Recovery Time (trr): 6 ns
• Current - Reverse Leakage @ Vr: 2.5 µA @ 70 V
• Operating Temperature - Junction (Max): 150°C

Mechanical Parameters (Must Match):

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Compliance Parameters (Must Match or Exceed):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The BAV70-HF meets all electrical, mechanical, and compliance requirements for direct substitution with the CDST-70-G.

Parameter Comparison

Engineering Selection Recommendations

The BAV70-HF is a direct electrical and mechanical equivalent to the CDST-70-G. Both components are manufactured by Comchip Technology and share identical electrical ratings, package specifications, and compliance certifications.

The primary distinction is product status: CDST-70-G is Obsolete, while BAV70-HF is Active. The BAV70-HF is available in Tape & Reel (TR) packaging format, supporting automated assembly processes.

Both parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly and storage protocols.

For new designs or production continuity of existing applications, the BAV70-HF is the appropriate selection due to its Active product status and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can BAV70-HF replace CDST-70-G in existing designs?

A: Yes. The BAV70-HF meets all electrical and mechanical specifications of the CDST-70-G. Both components feature identical voltage ratings (70V), current ratings (200mA per diode), forward voltage characteristics (1.25V @ 150mA), and package configuration (SOT-23-3). Direct substitution is supported without circuit modification.

Q: What is the difference between the speed classifications listed for these parts?

A: The CDST-70-G is classified as Small Signal (≤200mA, Any Speed), while the BAV70-HF is classified as Fast Recovery (≤500ns, >200mA). Both parts share identical reverse recovery time (6ns) and operate within the same current range (200mA). The speed classification difference reflects manufacturing process variations but does not affect functional equivalence at the specified operating parameters.

Q: Are there packaging differences between CDST-70-G and BAV70-HF?

A: Both parts use identical package specifications: TO-236-3, SC-59, SOT-23-3 surface mount configuration. The BAV70-HF is supplied in Tape & Reel (TR) format, which is standard for automated assembly. The CDST-70-G packaging format was not specified in the available data. Both packages are mechanically and electrically compatible with standard PCB assembly equipment.

Q: Do both parts meet current compliance requirements?

A: Yes. Both CDST-70-G and BAV70-HF are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Both parts are classified as EAR99 for export control purposes and share identical HTSUS commodity codes (8541.10.0070). Compliance requirements are fully satisfied by either component.

Q: Why is CDST-70-G marked as Obsolete?

A: Product status reflects manufacturer lifecycle decisions. The Obsolete designation for CDST-70-G indicates that the manufacturer has discontinued active production and support. The BAV70-HF, carrying Active status, represents the current production equivalent and is the recommended selection for ongoing applications.