RS2K-13 Equivalent & Substitute Parts

Part Overview

The RS2K-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMB (DO-214AA) package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified performance characteristics within acceptable application parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C

Substitute Part Grouping Explanation

Substitution of the RS2K-13 rectifier diode is determined by the following critical parameters: reverse voltage rating (800 V), package type (DO-214AA SMB), mounting configuration (surface mount), and thermal operating range. Equivalent parts must match all electrical specifications including forward voltage, reverse recovery time, and reverse leakage current. Substitute parts may vary in average rectified current capacity, forward voltage characteristics, and recovery time classification, provided the reverse voltage rating and package remain constant.

The RS2K-13 has been grouped into two substitution categories:

Parametric Equivalent: RS2K-13-F maintains identical electrical performance and specifications while offering improved product status (active versus discontinued).

Manufacturer Recommended Substitutes: STTH208U and S3KB provide functional alternatives with modified current ratings and recovery characteristics suitable for applications where the original specifications can accommodate parameter variations.

Parameter Comparison

Parameter	RS2K-13	RS2K-13-F	STTH208U	S3KB
Manufacturer	Diodes Incorporated	Diodes Incorporated	STMicroelectronics	Taiwan Semiconductor Corporation
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	1.5 A	1.5 A	2 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	1.3 V @ 1.5 A	1.65 V @ 2 A	1.15 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery >500ns
Reverse Recovery Time (trr)	500 ns	500 ns	75 ns	1.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	10 µA @ 800 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	Max 175°C	-55°C ~ 150°C
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

RS2K-13-F (Diodes Incorporated): This part is the direct parametric equivalent to the RS2K-13, offering identical electrical specifications and package configuration. The RS2K-13-F is currently in active production status with ROHS3 compliance certification, making it the primary replacement for discontinued RS2K-13 applications. This selection eliminates design modification requirements while ensuring regulatory compliance.

STTH208U (STMicroelectronics): This substitute provides a 2 A average rectified current rating with fast recovery characteristics (75 ns trr). The STTH208U maintains the 800 V reverse voltage rating and SMB package format. This option is suitable for applications where current capacity can be increased beyond the original 1.5 A specification. ROHS3 compliance and active product status support long-term availability.

S3KB (Taiwan Semiconductor Corporation): This substitute offers a 3 A average rectified current rating with standard recovery classification (1.5 µs trr). The S3KB maintains 800 V reverse voltage and SMB package compatibility. This option provides the highest current capacity among available substitutes and is suitable for applications tolerating slower recovery time. ROHS3 compliance and high inventory availability support production continuity.

All substitute options maintain the 800 V reverse voltage specification and DO-214AA SMB package format, ensuring mechanical and electrical compatibility within the specified voltage class.

Frequently Asked Questions (FAQ)

Q: Can RS2K-13-F be used as a direct replacement for RS2K-13?

A: Yes. The RS2K-13-F is a parametric equivalent with identical voltage rating (800 V), current rating (1.5 A), forward voltage (1.3 V @ 1.5 A), recovery time (500 ns), and package configuration (DO-214AA SMB). The primary difference is product status (active versus discontinued) and RoHS compliance certification.

Q: What is the difference between STTH208U and S3KB as substitutes?

A: Both parts maintain the 800 V reverse voltage and SMB package. STTH208U provides 2 A current capacity with fast recovery (75 ns), while S3KB provides 3 A current capacity with standard recovery (1.5 µs). STTH208U is suitable for applications requiring faster switching performance; S3KB is suitable for applications tolerating slower recovery with higher current capacity.

Q: Are all substitute parts compatible with the original RS2K-13 PCB layout?

A: Yes. All substitute parts use the DO-214AA (SMB) package format with identical mechanical dimensions and pin configuration, ensuring direct PCB footprint compatibility without layout modification.

Q: What is the impact of using S3KB with its higher current rating in a 1.5 A application?

A: The S3KB is rated for 3 A average rectified current, making it suitable for applications originally designed for 1.5 A operation. The higher current rating provides design margin without affecting circuit performance. However, the standard recovery time (1.5 µs) is slower than the original RS2K-13 (500 ns), which may impact switching frequency applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. RS2K-13-F, STTH208U, and S3KB all carry ROHS3 compliance certification. The original RS2K-13 is RoHS non-compliant, making the substitutes necessary for applications requiring regulatory compliance.

Q: What is the operating temperature range difference between substitutes?

A: RS2K-13 and RS2K-13-F operate from -65°C to 150°C. STTH208U has a maximum junction temperature of 175°C (no minimum specified). S3KB operates from -55°C to 150°C. Applications requiring the full -65°C minimum temperature should use RS2K-13-F.

Q: Can STTH208U be used in high-frequency switching applications?

A: Yes. STTH208U features fast recovery classification with 75 ns reverse recovery time, making it suitable for high-frequency switching applications. This is faster than the original RS2K-13 (500 ns), providing improved switching performance.

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