CRSH2-2 BK Schottky Diode 20V 2A Equivalent & Substitute Parts

Part Overview

The CRSH2-2 BK is a Schottky rectifier diode manufactured by Central Semiconductor Corp, rated for 20V DC reverse voltage and 2A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. Schottky diodes in this voltage and current class are widely used in power supply circuits, rectification stages, and reverse polarity protection applications where fast recovery characteristics are required.

Substiute Parts

CRSH2-2 BK

Central Semiconductor CorpIn Stock: 964CRSH2-2 BK Datasheet

Current PartRFQ

SB220-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1452SB220-E3/54 Datasheet

DirectRFQ

SB220-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 1205SB220-E3/73 Datasheet

DirectRFQ

SB220E-G

Comchip TechnologyIn Stock: 725SB220E-G Datasheet

DirectRFQ

SR202 A0G

Taiwan Semiconductor CorporationIn Stock: 932SR202 A0G Datasheet

MFR RecommendedRFQ

SR202 B0G

Taiwan Semiconductor CorporationIn Stock: 1114SR202 B0G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CRSH2-2 BK is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 20V
• Current - Average Rectified (Io): 2A
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: DO-204AC, DO-15, or Axial variants
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 20V
• Operating Temperature Range: Minimum -55°C to 125°C

Allowable Variation:

• Voltage - Forward (Vf) (Max) @ If: 500–550 mV @ 2A (minor forward voltage tolerance acceptable within Schottky diode specifications)
• Capacitance @ Vr, F: Not specified for all parts; absence of specification does not disqualify substitution

All substitute parts listed below meet these criteria and are classified as active products with current manufacturing status, ensuring long-term availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications):

SB220-E3/54 and SB220-E3/73 from Vishay General Semiconductor are direct functional equivalents to the CRSH2-2 BK. Both parts maintain identical electrical parameters including forward voltage, reverse voltage, current rating, and operating temperature range. Both are ROHS3 compliant and carry active product status, ensuring sustained manufacturing and supply availability. The SB220-E3/54 is available in Cut Tape (CT) packaging, while SB220-E3/73 packaging is unspecified; both use DO-204AC (DO-15) package designation.

SB220E-G from Comchip Technology is functionally equivalent with identical electrical specifications and active product status. This part is supplied in Tape & Reel (TR) packaging and uses the DO-15 package designation.

Secondary Substitutes (Minor Parameter Variation):

SR202 A0G and SR202 B0G from Taiwan Semiconductor Corporation are functionally equivalent with the following considerations:

• Forward voltage specification is 550 mV @ 2A, compared to 500 mV for the primary substitutes. This 50 mV increase remains within acceptable Schottky diode tolerance ranges and does not affect circuit functionality in standard rectification applications.
• Operating temperature range is -55°C to 125°C, compared to -65°C for the CRSH2-2 BK. The upper temperature limit remains identical; the lower limit is 10°C higher. This is acceptable for applications not requiring operation below -55°C.
• Both parts are ROHS3 compliant and carry active product status.

All substitute parts are classified as REACH Unaffected and carry ECCN EAR99 designation, matching the regulatory profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can SB220-E3/54 and SB220-E3/73 be used interchangeably with CRSH2-2 BK?

A: Yes. Both Vishay parts are direct electrical and mechanical equivalents. They maintain identical voltage ratings (20V), current ratings (2A), forward voltage (500 mV @ 2A), and operating temperature range (-65 to 125°C). Both use DO-204AC (DO-15) package designation, which is mechanically compatible with the original DO-15 package.

Q: What is the difference between SB220-E3/54 and SB220-E3/73?

A: Both parts are electrically identical. The difference lies in packaging format: SB220-E3/54 is supplied in Cut Tape (CT), while SB220-E3/73 packaging is unspecified. Selection depends on procurement and assembly requirements.

Q: Can SR202 A0G or SR202 B0G replace CRSH2-2 BK?

A: Yes, with noted parameter variations. Both SR202 variants maintain the 20V reverse voltage and 2A current rating. Forward voltage is specified at 550 mV @ 2A (50 mV higher than the original), and operating temperature range is -55 to 125°C (10°C higher minimum). These variations are acceptable for standard rectification applications. The higher forward voltage may result in marginally increased power dissipation in high-current circuits.

Q: What is the difference between SR202 A0G and SR202 B0G?

A: Both parts are electrically identical. The designation suffix (A0G vs. B0G) indicates different manufacturing or packaging variants from Taiwan Semiconductor Corporation. Selection between them depends on supplier availability and internal part tracking requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (SB220-E3/54, SB220-E3/73, SB220E-G, SR202 A0G, SR202 B0G) are ROHS3 compliant, matching the regulatory requirement profile of the original CRSH2-2 BK component.

Q: Why is the CRSH2-2 BK classified as obsolete?

A: The CRSH2-2 BK is no longer in active production by Central Semiconductor Corp. However, 863 pieces remain in stock as new original inventory. The substitute parts listed are all active products with current manufacturing status, providing long-term design continuity and supply chain reliability.

Q: Can these diodes be used in reverse polarity protection circuits?

A: Yes. All listed parts are Schottky rectifier diodes suitable for reverse polarity protection applications. The fast recovery characteristic (≤ 500ns) and low forward voltage (500–550 mV) make them appropriate for this function.

Q: What is the significance of the DO-15 and DO-204AC package designations?

A: DO-15 and DO-204AC are equivalent package designations for the same axial through-hole diode package. Both refer to a two-lead axial component with identical mechanical dimensions and pin spacing. Parts specified as DO-204AC (DO-15) or DO-15 are mechanically interchangeable.