Equivalent & Substitute Parts for RS3M-13

Part Overview

The RS3M-13 is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as discontinued at DiGi Electronics, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

The RS3M-13 employs fast recovery technology with a reverse recovery time of 500 ns, making it suitable for applications requiring rapid switching characteristics. The part is RoHS non-compliant and carries an unlimited moisture sensitivity level (MSL 1).

Due to its discontinued status, equivalent substitute parts must be evaluated based on matching electrical specifications and mechanical compatibility to ensure seamless integration into existing designs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
Capacitance @ Vr, F	50	pF @ 4V, 1MHz

Substitute Part Grouping Explanation

Substitution of the RS3M-13 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-214AB, SMC (surface mount)
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Reverse Recovery Time (trr): Fast recovery characteristics (≤ 500 ns) preferred for switching performance
Voltage - Forward (Vf) (Max): Acceptable range 1.15 V to 1.7 V @ rated current
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 1000 V
Operating Temperature - Junction: Minimum -50°C to maximum 150°C

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (Fast Recovery): Parts matching both voltage and current ratings with fast recovery characteristics (trr ≤ 500 ns). These provide identical switching performance to the original RS3M-13.

Category B - Functional Equivalents (Standard Recovery): Parts matching voltage and current ratings but with standard recovery characteristics (trr > 500 ns). These are suitable for applications where switching speed is not critical.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Speed	Package	Product Status	RoHS Status
RS3M-13	Diodes Incorporated	1000	3	1.3 @ 3A	500	Fast Recovery ≤ 500ns	DO-214AB, SMC	Discontinued	Non-compliant
RS3M-13-F	Diodes Incorporated	1000	3	1.3 @ 3A	500	Fast Recovery ≤ 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
STTH310S	STMicroelectronics	1000	3	1.7 @ 3A	75	Fast Recovery ≤ 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
CURC307-G	Comchip Technology	1000	3	1.7 @ 3A	75	Fast Recovery ≤ 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3M-E3/57T	Vishay General Semiconductor - Diodes Division	1000	3	1.15 @ 2.5A	2500	Standard Recovery > 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3M-TP	Micro Commercial Co	1000	3	1.2 @ 3A	Not specified	Standard Recovery > 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
S3M	Diotec Semiconductor	1000	3	1.15 @ 3A	1500	Standard Recovery > 500ns	DO-214AB, SMC	Active	Not applicable
S3K	Diotec Semiconductor	800	3	1.15 @ 3A	1500	Standard Recovery > 500ns	DO-214AB, SMC	Active	ROHS3 Compliant
SMLJ60S10-TP	Micro Commercial Co	1000	6	1.0 @ 6A	Not specified	Standard Recovery > 500ns	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: RS3M-13-F

The RS3M-13-F from Diodes Incorporated is the direct functional equivalent of the discontinued RS3M-13. It maintains identical electrical specifications including 1000 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage drop at 3 A, and 500 ns reverse recovery time. The RS3M-13-F is currently in active production status with ROHS3 compliance, making it the preferred choice for direct replacement in existing designs without circuit modification.

Secondary Recommendations for Fast Recovery Applications: STTH310S and CURC307-G

Both STTH310S (STMicroelectronics) and CURC307-G (Comchip Technology) provide fast recovery characteristics with superior reverse recovery times of 75 ns, compared to the original 500 ns specification. These parts maintain the 1000 V / 3 A rating and DO-214AB package compatibility. The trade-off is a slightly higher forward voltage drop (1.7 V @ 3 A versus 1.3 V). These options are suitable for applications where improved switching performance is beneficial and the increased forward voltage drop is acceptable.

Alternative Options for Standard Recovery Applications: S3M-E3/57T, S3M-TP, and S3M

These parts provide 1000 V / 3 A ratings with standard recovery characteristics (trr > 500 ns). The S3M-E3/57T (Vishay) and S3M-TP (Micro Commercial Co) are ROHS3 compliant and actively produced. The S3M (Diotec Semiconductor) also meets the voltage and current requirements. These options are suitable for applications where switching speed is not a critical design parameter and lower forward voltage drops are preferred (1.15 V to 1.2 V @ 3 A).

Voltage-Reduced Alternative: S3K

The S3K (Diotec Semiconductor) provides an 800 V reverse voltage rating with 3 A current capacity. This part is suitable only for applications where the circuit design operates at voltages below 800 V. It offers a lower forward voltage drop (1.15 V @ 3 A) and is ROHS3 compliant.

Higher Current Alternative: SMLJ60S10-TP

The SMLJ60S10-TP (Micro Commercial Co) provides 1000 V reverse voltage with 6 A average rectified current capacity. This part is suitable for applications requiring higher current handling than the original 3 A specification. It features a lower forward voltage drop (1.0 V @ 6 A) and is ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can RS3M-13-F be used as a direct replacement for RS3M-13?

A: Yes. The RS3M-13-F is electrically and mechanically identical to the RS3M-13, with matching 1000 V reverse voltage, 3 A current rating, 1.3 V forward voltage drop, and 500 ns reverse recovery time. The primary difference is that RS3M-13-F is in active production with ROHS3 compliance, whereas the original RS3M-13 is discontinued and RoHS non-compliant.

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, enabling rapid switching transitions suitable for high-frequency applications. Standard recovery diodes have reverse recovery times exceeding 500 ns, resulting in slower switching but lower forward voltage drops in many cases. The RS3M-13 employs fast recovery technology with a 500 ns trr specification.

Q: Can STTH310S or CURC307-G replace RS3M-13 in all applications?

A: STTH310S and CURC307-G maintain the 1000 V / 3 A electrical ratings and fast recovery characteristics (75 ns trr). However, they exhibit a higher forward voltage drop of 1.7 V @ 3 A compared to the original 1.3 V specification. Substitution is valid for applications where this increased voltage drop does not compromise circuit performance or thermal management.

Q: Is the S3K suitable as a substitute for RS3M-13?

A: The S3K is suitable only for applications operating at voltages below 800 V. It provides the same 3 A current rating and DO-214AB package compatibility but has a reduced reverse voltage specification (800 V versus 1000 V). It is not suitable for circuits designed to operate at the full 1000 V specification of the original RS3M-13.

Q: Why would SMLJ60S10-TP be considered as an alternative?

A: The SMLJ60S10-TP provides the same 1000 V reverse voltage rating as the RS3M-13 but with double the current capacity (6 A versus 3 A). This part is suitable for applications requiring higher current handling or where design margin for current is desired. The lower forward voltage drop (1.0 V @ 6 A) may also provide thermal benefits in high-current applications.

Q: What packaging options are available for substitute parts?

A: All substitute parts listed maintain the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with the original RS3M-13 footprint. Packaging variations include Tape & Reel (TR), Cut Tape (CT), and Digi-Reel formats, which affect procurement and handling but do not alter electrical performance or PCB mounting compatibility.

Q: Are all substitute parts RoHS compliant?

A: Most active substitute parts listed are ROHS3 compliant, including RS3M-13-F, STTH310S, CURC307-G, S3M-E3/57T, S3M-TP, S3K, and SMLJ60S10-TP. The S3M (Diotec Semiconductor) has RoHS status listed as not applicable. The original RS3M-13 is RoHS non-compliant.

Q: What is the operating temperature range for substitute parts?

A: Operating temperature ranges vary among substitute parts. The RS3M-13 operates from -65°C to 150°C. Substitute parts generally operate within -40°C to 175°C (STTH310S), -50°C to 150°C (S3M, S3K, S3M-TP, S3M-E3/57T, SMLJ60S10-TP), or -55°C to 150°C (S3M-E3/57T, S3M-TP). Verify that the selected substitute meets the thermal requirements of the target application.

Q: How do reverse leakage current specifications compare?

A: The RS3M-13 specifies 5 µA @ 1000 V reverse leakage. Substitute parts specify leakage currents ranging from 5 µA to 10 µA @ 1000 V. The S3K specifies 5 µA @ 800 V. These variations are within acceptable ranges for general-purpose rectifier applications and do not typically impact circuit functionality.

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