CDST-2004S-G Equivalent & Substitute Parts

Part Overview

The CDST-2004S-G is a general-purpose diode array manufactured by Comchip Technology, configured as a 1 pair series connection with a maximum reverse voltage rating of 240 V and average rectified current of 225 mA per diode. The device is housed in a SOT-23-3 surface mount package and features fast recovery characteristics with a reverse recovery time of 50 ns.

The CDST-2004S-G is classified as obsolete. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and ongoing system support.

Substiute Parts

CDST-2004S-G

Comchip TechnologyIn Stock: 1080CDST-2004S-G Datasheet

Current PartRFQ

CDST-2004S-HF

Comchip TechnologyIn Stock: 824CDST-2004S-HF Datasheet

DirectRFQ

GSD2004S-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 2801GSD2004S-E3-08 Datasheet

Parametric EquivalentRFQ

MMBD2004S-7-F

Diodes IncorporatedIn Stock: 24128MMBD2004S-7-F Datasheet

Parametric EquivalentRFQ

MMBD2004SQ-7-F

Diodes IncorporatedIn Stock: 1113MMBD2004SQ-7-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDST-2004S-G is determined by strict equivalence across the following critical parameters:

• Diode Configuration: 1 Pair Series Connection (identical topology required)
• Voltage - DC Reverse (Vr) (Max): 240 V (minimum threshold for voltage rating)
• Current - Average Rectified (Io) (per Diode): 225 mA (DC) (current handling capacity)
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 100 mA (forward conduction characteristics)
• Speed Classification: Fast Recovery ≤ 500 ns, > 200 mA (Io) (switching performance)
• Reverse Recovery Time (trr): 50 ns (transient response)
• Current - Reverse Leakage @ Vr: 100 nA @ 240 V (leakage characteristics)
• Package / Case: TO-236-3, SC-59, SOT-23-3 (physical and electrical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

All substitute parts listed below meet these parameters without exception.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CDST-2004S-HF

The CDST-2004S-HF is the direct manufacturer equivalent from Comchip Technology. This part maintains identical electrical specifications and packaging to the obsolete CDST-2004S-G while offering active product status. The CDST-2004S-HF is ROHS3 compliant and carries EAR99 export classification. This part is the preferred choice for direct replacement in existing designs.

Secondary Substitutes: MMBD2004S-7-F and GSD2004S-E3-08

Both MMBD2004S-7-F (Diodes Incorporated) and GSD2004S-E3-08 (Vishay General Semiconductor) are parametric equivalents meeting all electrical and mechanical specifications. Both parts are active products with ROHS3 compliance and EAR99 export classification. These parts are suitable for new designs and production applications where multi-source qualification is required.

Automotive-Grade Alternative: MMBD2004SQ-7-F

The MMBD2004SQ-7-F is an automotive-grade variant from Diodes Incorporated, qualified to AEC-Q101 standard. This part meets all parametric requirements and is suitable for applications requiring automotive-grade component certification. The MMBD2004SQ-7-F is ROHS3 compliant and REACH unaffected.

All substitute parts are available in active production status, ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can CDST-2004S-HF be used as a direct replacement for CDST-2004S-G?

A: Yes. The CDST-2004S-HF is the direct manufacturer equivalent from Comchip Technology. All electrical parameters, package specifications, and compliance certifications are identical. The primary difference is product status: CDST-2004S-HF is active while CDST-2004S-G is obsolete.

Q: What is the difference between MMBD2004S-7-F and MMBD2004SQ-7-F?

A: Both parts are manufactured by Diodes Incorporated and meet identical electrical specifications. The MMBD2004SQ-7-F carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. The MMBD2004S-7-F is the standard industrial-grade variant. Selection depends on application requirements.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use the SOT-23-3 surface mount package. The CDST-2004S-G, CDST-2004S-HF, GSD2004S-E3-08, MMBD2004S-7-F, and MMBD2004SQ-7-F are all compatible with identical PCB footprints and assembly processes. GSD2004S-E3-08, MMBD2004S-7-F, and MMBD2004SQ-7-F are supplied in Tape & Reel (TR) packaging.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant. The MMBD2004S-7-F and MMBD2004SQ-7-F are additionally REACH unaffected.

Q: What is the operating temperature range for each substitute part?

A: CDST-2004S-G, CDST-2004S-HF, MMBD2004S-7-F, and MMBD2004SQ-7-F all operate across -65°C to 150°C junction temperature. The GSD2004S-E3-08 specifies a maximum junction temperature of 150°C without a minimum specification in the provided data.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts share identical electrical specifications, reverse voltage ratings (240 V), average rectified current (225 mA per diode), forward voltage characteristics (1 V @ 100 mA), and SOT-23-3 package geometry. Direct substitution on existing PCBs is supported without design modification.

Q: Which substitute part offers the highest inventory availability?

A: MMBD2004S-7-F from Diodes Incorporated currently has the highest inventory level at 24,080 pieces in stock, followed by GSD2004S-E3-08 at 2,780 pieces, CDST-2004S-HF at 799 pieces, and MMBD2004SQ-7-F at 1,066 pieces.