CDST-56-G Equivalent & Substitute Parts

Part Overview

The CDST-56-G is a general-purpose diode array manufactured by Comchip Technology, configured as a 1 Pair Common Anode with 70V reverse voltage rating and 200mA average rectified current per diode. The component is housed in a SOT-23-3 surface mount package (TO-236-3, SC-59).

The CDST-56-G is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array configuration.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Anode
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
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CDST-56-G are qualified based on strict electrical and mechanical parameter matching within the diode rectifier category. The following criteria determine substitution eligibility:

Core Electrical Parameters (Must Match):

Diode Configuration: 1 Pair Common Anode
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:

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

Substitute parts are grouped into two categories: MFR Recommended substitutes (active status, manufacturer-endorsed) and Parametric Equivalents (active status, electrically and mechanically identical).

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Ir @ Vr	Tj (Max)	Package	Packaging Type
CDST-56-G	Comchip Technology	Obsolete	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	—
BAW56-HF	Comchip Technology	Active	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	Tape & Reel (TR)
BAW56LT1G	onsemi	Active	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAW56LT3G	onsemi	Active	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	Tape & Reel (TR)
SBAW56LT1G	onsemi	Active	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	Tape & Reel (TR)
SBAW56LT3G	onsemi	Active	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C	SOT-23-3	Tape & Reel (TR)

Engineering Selection Recommendations

MFR Recommended Substitute:

BAW56-HF (Comchip Technology) is the manufacturer-recommended substitute for the obsolete CDST-56-G. This part maintains active product status and is supplied in Tape & Reel packaging. All electrical and mechanical parameters are identical to the original part. This option provides direct compatibility with existing designs and procurement processes.

Parametric Equivalents:

BAW56LT1G, BAW56LT3G, SBAW56LT1G, and SBAW56LT3G (all onsemi) are parametric equivalents that satisfy all core electrical and mechanical requirements. These parts are active products with ROHS3 compliance and MSL 1 rating.

SBAW56LT1G and SBAW56LT3G carry automotive-grade qualification (AEC-Q101) and are designated for automotive applications. These parts are suitable for designs requiring automotive-grade components.

All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can BAW56-HF be used as a direct replacement for CDST-56-G?

A: Yes. BAW56-HF is the manufacturer-recommended substitute. All electrical parameters (70V reverse voltage, 200mA current rating, 1.25V forward voltage, 6ns recovery time, 2.5µA leakage) and mechanical specifications (SOT-23-3 package, surface mount) are identical. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel).

Q: What is the difference between BAW56LT1G and BAW56LT3G?

A: Both parts are parametric equivalents from onsemi with identical electrical specifications. The difference is packaging format: BAW56LT1G is supplied in Cut Tape (CT) & Digi-Reel®, while BAW56LT3G is supplied in Tape & Reel (TR). Selection depends on procurement and assembly requirements.

Q: Are SBAW56LT1G and SBAW56LT3G suitable for non-automotive applications?

A: Yes. SBAW56LT1G and SBAW56LT3G meet all electrical and mechanical requirements for general-purpose applications. The automotive-grade designation (AEC-Q101) indicates additional qualification testing and reliability assurance, but these parts function identically to non-automotive equivalents in standard applications.

Q: Do all substitute parts have the same moisture sensitivity rating?

A: Yes. All substitute parts carry MSL 1 (Unlimited) rating, identical to the original CDST-56-G. No additional moisture control measures are required during storage or handling.

Q: Are there packaging considerations when switching from CDST-56-G to substitute parts?

A: The original CDST-56-G packaging format is not specified in the provided data. All substitute parts use standard Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Verify that your assembly process accommodates these standard packaging formats.

Q: Do all substitute parts comply with RoHS3 and REACH requirements?

A: Yes. All substitute parts listed are ROHS3 compliant. REACH status is unaffected for all onsemi parts (BAW56LT1G, BAW56LT3G, SBAW56LT1G, SBAW56LT3G). Comchip Technology BAW56-HF REACH status is not specified in the provided data; verify with the supplier if REACH compliance documentation is required.

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