S2KA-13 Equivalent & Substitute Parts

Part Overview

The S2KA-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800V DC reverse voltage and 1.5A average rectified current in a surface mount SMA package. This component is classified as Active product status and is fully RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). The S2KA-13 is supplied in Cut Tape (CT) and Digi-Reel® packaging formats with 1707 pieces currently in stock.

Equivalent and substitute parts are identified based on matching or exceeding the electrical specifications and mechanical compatibility of the original component. Substitutes are selected when they maintain the same voltage rating, current capacity, package type, and mounting configuration while meeting all applicable compliance standards.

Key Parameters

Parameter	S2KA-13 Specification
Manufacturer	Diodes Incorporated
Voltage - DC Reverse (Vr) (Max)	800 V
Current - Average Rectified (Io)	1.5 A
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the S2KA-13 are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 800V minimum
Current - Average Rectified (Io): 1.5A minimum
Package / Case: DO-214AC (SMA) surface mount
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1
Product Status: Active

Substitution Logic:

Direct Equivalent (Packaging Variant): S2KA-13-F is a direct equivalent manufactured by Diodes Incorporated with identical electrical ratings (800V, 1.5A) and package type. The primary difference is packaging format (Tape & Reel versus Cut Tape/Digi-Reel), making it a direct functional substitute.

Similar Substitutes (Voltage/Current Match): BYG21K-E3/TR and BYG21K-E3/TR3 are manufactured by Vishay General Semiconductor and meet the 800V and 1.5A specifications. These components utilize Avalanche technology and feature fast recovery characteristics (≤500ns). Both are supplied in Tape & Reel packaging.

Partial Substitutes (Voltage Match, Current Reduction): STTH108A and STTH110A are manufactured by STMicroelectronics. STTH108A matches the 800V voltage rating but operates at 1A average rectified current (reduced from 1.5A). STTH110A exceeds the voltage rating at 1000V but also operates at 1A average rectified current. Both feature fast recovery characteristics and are supplied in Cut Tape and Digi-Reel® packaging.

Parameter Comparison

Parameter	S2KA-13	S2KA-13-F	BYG21K-E3/TR	BYG21K-E3/TR3	STTH108A	STTH110A
Manufacturer	Diodes Inc.	Diodes Inc.	Vishay	Vishay	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V	800 V	1000 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A	1.5 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	Not specified	1.15 V @ 1.5 A	1.6 V @ 1.5 A	1.6 V @ 1.5 A	1.65 V @ 1 A	1.7 V @ 1 A
Speed	Not specified	Standard Recovery >500ns, >200mA	Fast Recovery ≤500ns, >200mA	Fast Recovery ≤500ns, >200mA	Fast Recovery ≤500ns, >200mA	Fast Recovery ≤500ns, >200mA
Reverse Recovery Time (trr)	Not specified	Not specified	120 ns	120 ns	75 ns	75 ns
Current - Reverse Leakage @ Vr	Not specified	5 µA @ 800 V	1 µA @ 800 V	1 µA @ 800 V	5 µA @ 800 V	10 µA @ 1000 V
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	Not specified	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	175°C (Max)	175°C (Max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

S2KA-13-F is the preferred direct substitute when packaging format flexibility is acceptable. This part maintains identical electrical specifications (800V, 1.5A) and is manufactured by the same supplier (Diodes Incorporated). Both components are Active status products with ROHS3 compliance and MSL 1 rating. The S2KA-13-F is supplied in Tape & Reel packaging with significantly higher inventory availability (77,100 pieces).

Cross-Manufacturer Substitutes:

BYG21K-E3/TR and BYG21K-E3/TR3 (Vishay) are functionally equivalent alternatives that meet the 800V and 1.5A specifications. Both are Active status products with full ROHS3 compliance and MSL 1 rating. These components feature Avalanche technology and fast recovery characteristics (120 ns reverse recovery time). Selection between BYG21K-E3/TR (17,150 pieces) and BYG21K-E3/TR3 (4,309 pieces) depends on inventory requirements and supply chain considerations.

Current-Reduced Substitutes:

STTH108A and STTH110A are suitable only for applications where the average rectified current requirement does not exceed 1A. STTH108A maintains the 800V voltage rating with 1A current capacity, while STTH110A provides 1000V voltage rating with 1A current capacity. Both are Active status products with ROHS3 compliance and MSL 1 rating. These components feature fast recovery characteristics (75 ns reverse recovery time) and are supplied in Cut Tape and Digi-Reel® packaging. STTH108A has higher inventory availability (80,200 pieces) compared to STTH110A (60,100 pieces).

Compliance Verification:

All substitute parts maintain Active product status, ROHS3 compliance, MSL 1 rating, REACH Unaffected status, and EAR99 ECCN classification, ensuring regulatory and supply chain compatibility with the original S2KA-13 component.

Frequently Asked Questions (FAQ)

Q: Can S2KA-13-F be used as a direct replacement for S2KA-13?

A: Yes. S2KA-13-F is a direct electrical equivalent manufactured by Diodes Incorporated with identical 800V and 1.5A specifications. The primary difference is packaging format (Tape & Reel versus Cut Tape/Digi-Reel). Both components are Active status and ROHS3 compliant.

Q: What is the difference between S2KA-13 and BYG21K-E3/TR?

A: Both components meet the 800V and 1.5A specifications and use the same DO-214AC (SMA) package. The primary differences are manufacturer (Diodes Incorporated versus Vishay), technology type (Standard versus Avalanche), and recovery characteristics. BYG21K-E3/TR features Avalanche technology with 120 ns reverse recovery time, while S2KA-13 uses Standard technology.

Q: Can STTH108A replace S2KA-13 in all applications?

A: STTH108A is suitable only for applications where the average rectified current requirement does not exceed 1A. The S2KA-13 is rated for 1.5A, so STTH108A cannot be used in circuits requiring the full 1.5A current capacity. Both components share the 800V voltage rating and DO-214AC (SMA) package.

Q: Why does STTH110A have a higher voltage rating than S2KA-13?

A: STTH110A is rated for 1000V DC reverse voltage compared to S2KA-13's 800V rating. This higher voltage rating does not prevent substitution in 800V applications, as the component can operate safely at lower voltages. However, STTH110A is limited to 1A average rectified current, making it unsuitable for applications requiring the full 1.5A capacity of S2KA-13.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (S2KA-13-F, BYG21K-E3/TR, BYG21K-E3/TR3, STTH108A, and STTH110A) are ROHS3 compliant with MSL 1 rating and REACH Unaffected status, matching the compliance profile of the original S2KA-13.

Q: What is the difference between BYG21K-E3/TR and BYG21K-E3/TR3?

A: Both components are manufactured by Vishay with identical electrical specifications (800V, 1.5A, Avalanche technology, 120 ns reverse recovery time) and package type (DO-214AC/SMA). The primary difference is inventory availability, with BYG21K-E3/TR having 17,150 pieces and BYG21K-E3/TR3 having 4,309 pieces in stock.

Q: Can I use STTH110A instead of STTH108A?

A: Both components are suitable for applications requiring 1A or less average rectified current. STTH110A provides a higher voltage rating (1000V versus 800V), which offers additional margin in high-voltage applications. Both are Active status, ROHS3 compliant, and use the same DO-214AC (SMA) package.

Q: What packaging formats are available for S2KA-13 substitutes?

A: S2KA-13 is supplied in Cut Tape (CT) and Digi-Reel® packaging. S2KA-13-F, BYG21K-E3/TR, and BYG21K-E3/TR3 are supplied in Tape & Reel (TR) packaging. STTH108A and STTH110A are supplied in Cut Tape (CT) and Digi-Reel® packaging, matching the original S2KA-13 format.

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