Equivalent & Substitute Parts for RS3K-13

Part Overview

The RS3K-13 is a general-purpose rectifier diode rated for 800 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This part is manufactured by Diodes Incorporated and is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design and procurement requirements. The part features fast recovery characteristics with a reverse recovery time of 500 ns and operates across a junction temperature range of -65°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-65 to 150	°C

Substitute Part Grouping Explanation

Substitution of the RS3K-13 is determined by the following critical parameters:

Voltage Rating (Vr): The maximum DC reverse voltage must equal or exceed 800 V. Parts with higher voltage ratings (1000 V) are acceptable for voltage-constrained applications but represent a design change.

Current Rating (Io): The average rectified current must equal or exceed 3 A. Parts with higher current ratings are acceptable but represent a design change.

Package Type: All substitutes must use the DO-214AB (SMC) surface mount package to maintain mechanical and thermal compatibility.

Recovery Characteristics: The RS3K-13 specifies fast recovery (≤ 500 ns). Substitutes with standard recovery characteristics (> 500 ns) represent a functional change and may affect circuit performance in high-frequency switching applications.

Temperature Range: The operating junction temperature range must accommodate the application requirements. The RS3K-13 operates from -65°C to 150°C.

Substitutes are grouped into two categories:

Category 1 - Direct Electrical Equivalents (800 V, 3 A): Parts that maintain identical voltage and current ratings with the same SMC package. These include RS3K-13-F, S3K, S3K-E3/57T, and S3K-TP.

Category 2 - Higher Voltage or Current Alternatives: Parts that exceed the RS3K-13 specifications in voltage (1000 V) or current (6 A) ratings. These include S3M, S3M-TP, SMLJ60S10-TP, and STTH310S.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status	RoHS Status
RS3K-13	Diodes Incorporated	800	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	500	5 @ 800 V	DO-214AB, SMC	-65 to 150	Discontinued	RoHS Non-Compliant
RS3K-13-F	Diodes Incorporated	800	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	500	5 @ 800 V	DO-214AB, SMC	-65 to 150	Active	ROHS3 Compliant
S3K	Diotec Semiconductor	800	3	1.15 @ 3 A	Standard Recovery > 500ns	1500	5 @ 800 V	DO-214AB, SMC	-50 to 150	Active	ROHS3 Compliant
S3K-E3/57T	Vishay General Semiconductor - Diodes Division	800	3	1.15 @ 2.5 A	Standard Recovery > 500ns	2500	10 @ 800 V	DO-214AB, SMC	-55 to 150	Active	ROHS3 Compliant
S3K-TP	Micro Commercial Co	800	3	1.2 @ 3 A	Standard Recovery > 500ns	—	10 @ 800 V	DO-214AB, SMC	-55 to 150	Active	ROHS3 Compliant
S3M	Diotec Semiconductor	1000	3	1.15 @ 3 A	Standard Recovery > 500ns	1500	5 @ 1000 V	DO-214AB, SMC	-50 to 150	Active	Not Applicable
S3M-TP	Micro Commercial Co	1000	3	1.2 @ 3 A	Standard Recovery > 500ns	—	10 @ 1000 V	DO-214AB, SMC	-55 to 150	Active	ROHS3 Compliant
SMLJ60S10-TP	Micro Commercial Co	1000	6	1 @ 6 A	Standard Recovery > 500ns	—	5 @ 1000 V	DO-214AB, SMC	-55 to 150	Active	ROHS3 Compliant
STTH310S	STMicroelectronics	1000	3	1.7 @ 3 A	Fast Recovery ≤ 500ns	75	10 @ 1000 V	DO-214AB, SMC	-40 to 175	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical and Mechanical Specifications):

RS3K-13-F is the direct equivalent of RS3K-13, manufactured by Diodes Incorporated with identical electrical parameters and SMC package. RS3K-13-F is currently active in production and ROHS3 compliant, addressing the discontinuation status of the original part. This substitution requires no circuit redesign.

800 V, 3 A Alternatives with Modified Recovery Characteristics:

S3K (Diotec Semiconductor), S3K-E3/57T (Vishay), and S3K-TP (Micro Commercial Co) maintain the 800 V voltage rating and 3 A current rating in the DO-214AB package. These parts feature standard recovery characteristics (> 500 ns) rather than fast recovery, resulting in longer reverse recovery times (1500 ns to 2500 ns). All three are ROHS3 compliant and active in production. Selection of these alternatives is appropriate for applications where recovery speed is not a critical performance parameter.

Higher Voltage Alternatives (1000 V Rating):

S3M (Diotec Semiconductor) and S3M-TP (Micro Commercial Co) provide 1000 V voltage rating with 3 A current rating. These parts are suitable for applications requiring higher voltage margin. Both maintain the DO-214AB package and are ROHS3 compliant. S3M-TP offers the advantage of tape and reel packaging and higher inventory availability.

Higher Current Alternative (1000 V, 6 A):

SMLJ60S10-TP (Micro Commercial Co) provides both elevated voltage (1000 V) and current (6 A) ratings. This part is appropriate for applications requiring increased current capacity and voltage margin. It is ROHS3 compliant and available in tape and reel packaging.

Fast Recovery Alternative with Higher Voltage:

STTH310S (STMicroelectronics) maintains fast recovery characteristics (75 ns) while providing 1000 V voltage rating and 3 A current rating. This part is suitable for high-frequency switching applications requiring both elevated voltage and fast recovery performance. STTH310S offers an extended operating temperature range (-40°C to 175°C) and is ROHS3 compliant.

Compliance Considerations:

The original RS3K-13 is RoHS non-compliant. All recommended substitutes except S3M are ROHS3 compliant, supporting compliance requirements in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can RS3K-13-F be used as a direct replacement for RS3K-13?

A: Yes. RS3K-13-F is manufactured by Diodes Incorporated with identical electrical specifications (800 V, 3 A, fast recovery, 500 ns reverse recovery time) and the same DO-214AB SMC package. The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have reverse recovery times of 500 ns or less, while standard recovery diodes exceed 500 ns. The RS3K-13 specifies fast recovery (500 ns). Substitutes with standard recovery characteristics (S3K, S3K-E3/57T, S3K-TP, S3M, S3M-TP, SMLJ60S10-TP) have longer reverse recovery times. In high-frequency switching circuits, this difference may affect switching losses and electromagnetic interference characteristics. In low-frequency or linear applications, the difference is typically not significant.

Q: Can I use a 1000 V rated diode in place of an 800 V rated diode?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. Parts such as S3M, S3M-TP, SMLJ60S10-TP, and STTH310S are rated for 1000 V and can be used in 800 V applications. This substitution does not require circuit modification but represents a design change that may affect cost and performance characteristics.

Q: Can I use a 6 A rated diode in place of a 3 A rated diode?

A: Yes. A higher current rating provides additional capacity and is electrically compatible. SMLJ60S10-TP is rated for 6 A and can be used in 3 A applications. This substitution does not require circuit modification but represents a design change that may affect cost and thermal characteristics.

Q: What is the significance of packaging type (Tape & Reel versus Bulk)?

A: Packaging type affects procurement and assembly processes. Tape & Reel (TR) packaging is suitable for automated pick-and-place assembly and is typically ordered in larger quantities. Bulk packaging is suitable for manual assembly or smaller production runs. The electrical and mechanical specifications remain identical regardless of packaging type. RS3K-13-F, S3K-TP, S3M-TP, SMLJ60S10-TP, and STTH310S are available in Tape & Reel packaging.

Q: Does the operating temperature range affect substitution compatibility?

A: The operating temperature range must accommodate the application requirements. The RS3K-13 operates from -65°C to 150°C. Most substitutes operate from -50°C to 150°C or -55°C to 150°C, which is acceptable for most applications. STTH310S offers an extended range (-40°C to 175°C). If the application requires operation below -50°C, only RS3K-13 or RS3K-13-F are suitable.

Q: What does RoHS compliance mean for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance indicates that the component does not contain restricted substances such as lead, cadmium, or mercury. ROHS3 compliant parts are required for many regulated applications and markets. The original RS3K-13 is RoHS non-compliant. All recommended substitutes except S3M are ROHS3 compliant, supporting compliance requirements in regulated applications.

Q: How do I determine which substitute is most appropriate for my application?

A: Selection depends on three primary factors: (1) voltage requirement (800 V minimum for RS3K-13 applications; higher ratings provide margin), (2) current requirement (3 A minimum; higher ratings provide margin), and (3) recovery speed requirement (fast recovery for high-frequency switching; standard recovery acceptable for linear or low-frequency applications). RS3K-13-F is the direct replacement. For applications where recovery speed is not critical, S3K, S3K-E3/57T, or S3K-TP offer cost-effective alternatives. For applications requiring higher voltage or current margin, S3M, S3M-TP, SMLJ60S10-TP, or STTH310S are appropriate.

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