S15KCHR7G Equivalent & Substitute Parts

Part Overview

The S15KCHR7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 800 V DC reverse voltage and 15 A average rectified current in a DO-214AB (SMC) surface mount package. This component is qualified to AEC-Q101 automotive standards and features standard recovery characteristics with a maximum forward voltage of 1.1 V at 15 A.

The S15KCHR7G is discontinued at DiGi Electronics. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options and product status considerations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	15	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 15 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	1	µA @ 800 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Grade	Automotive	-
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

The S15KCHR7G operates at 15 A average rectified current with 800 V reverse voltage rating. Direct substitutes at the same current rating are not available in the provided substitute list. All listed substitute parts operate at reduced current ratings (3 A to 5 A), making them suitable only for applications where the circuit design permits lower current handling.

Substitution logic is based on the following parameters:

Voltage - DC Reverse (Vr) (Max): All substitutes maintain 800 V rating, matching the main part
Current - Average Rectified (Io): Substitutes range from 3 A to 5 A, below the 15 A specification
Package / Case: All substitutes use DO-214AB (SMC) or DO-214AA (SMB) surface mount packages
Operating Temperature Range: All substitutes support -55°C to 175°C junction temperature range
Recovery Speed: Substitutes include both standard recovery (>500ns) and fast recovery (≤500ns) options
Automotive Grade & AEC-Q101: Available in select substitutes (RS3KHE3_A/H, RS3KHE3_A/I)
RoHS3 Compliance: All substitutes are ROHS3 compliant

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Ir @ Vr [µA]	Package	Temp Range [°C]	AEC-Q101	Product Status
S15KCHR7G	Taiwan Semiconductor	800	15	1.1 @ 15A	Standard >500ns	1 @ 800V	DO-214AB	-55 to 150	Yes	Discontinued
CGRC506-G	Comchip Technology	800	5	1.15 @ 5A	Standard >500ns	10 @ 800V	DO-214AB	-55 to 150	No	Active
CURC306-G	Comchip Technology	800	3	1.7 @ 3A	Fast ≤500ns	5 @ 800V	DO-214AB	-55 to 150	No	Active
ER3K-TP	Micro Commercial Co	800	3	1.7 @ 3A	Fast ≤500ns	5 @ 800V	DO-214AB	-55 to 175	No	Active
RS3K-13-F	Diodes Incorporated	800	3	1.3 @ 3A	Fast ≤500ns	5 @ 800V	DO-214AB	-65 to 150	No	Active
RS3KB-13-F	Diodes Incorporated	800	3	1.3 @ 3A	Fast ≤500ns	5 @ 800V	DO-214AA	-65 to 150	No	Active
RS3KHE3_A/H	Vishay General Semiconductor	800	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 800V	DO-214AB	-55 to 150	Yes	Active
RS3KHE3_A/I	Vishay General Semiconductor	800	3	1.3 @ 2.5A	Fast ≤500ns	10 @ 800V	DO-214AB	-55 to 150	Yes	Active
S3K	Diotec Semiconductor	800	3	1.15 @ 3A	Standard >500ns	5 @ 800V	DO-214AB	-50 to 150	No	Active
S3K-13-F	Diodes Incorporated	800	3	1.15 @ 3A	Standard >500ns	10 @ 800V	DO-214AB	-65 to 150	No	Active
S3K-TP	Micro Commercial Co	800	3	1.2 @ 3A	Standard >500ns	10 @ 800V	DO-214AB	-55 to 150	No	Active

Engineering Selection Recommendations

Current Rating Limitation: The S15KCHR7G is rated for 15 A average rectified current. All available substitutes operate at 3 A to 5 A ratings. Selection of any substitute part requires circuit redesign or application confirmation that the lower current rating is acceptable.

Automotive Grade Substitutes: For applications requiring AEC-Q101 automotive qualification equivalent to the original part, only RS3KHE3_A/H and RS3KHE3_A/I meet this requirement. Both are manufactured by Vishay General Semiconductor and maintain the 800 V reverse voltage rating with 3 A current capacity.

Standard Recovery Options: For applications requiring standard recovery characteristics (>500ns) matching the original part, select from:

CGRC506-G (Comchip Technology, 5 A)
S3K (Diotec Semiconductor, 3 A)
S3K-13-F (Diodes Incorporated, 3 A)
S3K-TP (Micro Commercial Co, 3 A)

Fast Recovery Options: For applications where fast recovery (≤500ns) is acceptable or preferred, select from:

CURC306-G (Comchip Technology, 3 A)
ER3K-TP (Micro Commercial Co, 3 A)
RS3K-13-F (Diodes Incorporated, 3 A)
RS3KB-13-F (Diodes Incorporated, 3 A, SMB package)
RS3KHE3_A/H (Vishay, 3 A, AEC-Q101)
RS3KHE3_A/I (Vishay, 3 A, AEC-Q101)

Package Considerations: RS3KB-13-F uses DO-214AA (SMB) package, differing from the original DO-214AB (SMC) package. All other substitutes maintain DO-214AB (SMC) compatibility.

Product Status: All listed substitutes are active products with current manufacturing status, ensuring long-term availability compared to the discontinued S15KCHR7G.

Frequently Asked Questions (FAQ)

Q: Can the S15KCHR7G be directly replaced with a 3 A or 5 A rated substitute?

A: Direct replacement is not possible without circuit redesign. The S15KCHR7G handles 15 A average rectified current. Substitutes rated at 3 A or 5 A will not safely conduct the same current levels. Application redesign or current limiting is required.

Q: What is the primary difference between standard recovery and fast recovery diodes in this product line?

A: Standard recovery diodes (>500ns) have longer reverse recovery times, typically 1.5 µs or greater. Fast recovery diodes (≤500ns) have reverse recovery times of 75 ns to 500 ns. Fast recovery diodes reduce switching losses and are suitable for higher frequency applications. Standard recovery diodes are appropriate for lower frequency rectification circuits.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the environmental compliance of the original S15KCHR7G.

Q: Which substitutes maintain automotive qualification?

A: RS3KHE3_A/H and RS3KHE3_A/I are both AEC-Q101 qualified, matching the automotive grade of the original part. These are manufactured by Vishay General Semiconductor.

Q: What is the difference between RS3KB-13-F and other RS3K variants?

A: RS3KB-13-F uses a DO-214AA (SMB) surface mount package, while other RS3K variants use DO-214AB (SMC) package. The SMB package is physically larger than SMC. Electrical specifications remain equivalent at 3 A, 800 V rating.

Q: Can I use a substitute with a lower operating temperature range?

A: The S15KCHR7G operates from -55°C to 150°C. Most substitutes support this range or wider ranges. S3K operates from -50°C to 150°C, which is slightly narrower at the low end. Verify that the substitute's temperature range meets your application requirements.

Q: What inventory levels are available for active substitutes?

A: Inventory varies by part. RS3KHE3_A/H has the highest inventory at 95,200 pieces. S3K-13-F has 87,200 pieces. CGRC506-G has 1,137 pieces. Verify current inventory with your supplier for production requirements.

Q: Are all substitutes available in Tape & Reel packaging?

A: Most substitutes are available in Tape & Reel (TR) packaging. S3K and S15KCHR7G do not specify packaging format in the provided data. Confirm packaging availability with your supplier.

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