S2M-13 General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The S2M-13 is a general purpose rectifier diode manufactured by Diodes Incorporated, rated for 1000 V DC reverse voltage and 1.5 A average rectified current in a surface mount SMB (DO-214AA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Surface Mount
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the S2M-13 rectifier diode is determined by the following critical parameters: maximum reverse voltage (Vr), average rectified current (Io), forward voltage drop (Vf), reverse leakage current, package type, and operating temperature range. A substitute part must meet or exceed the electrical ratings of the original component to ensure circuit functionality and reliability.

The substitute parts are grouped into the following categories:

Parametric Equivalent (Direct Replacement): Parts with identical electrical specifications and package type, differing only in packaging format or compliance status.

Direct Manufacturer Equivalent: Parts with enhanced current ratings or improved recovery characteristics while maintaining voltage compatibility and package compatibility.

Manufacturer Recommended Alternatives: Parts with modified package types or voltage ratings that provide functional equivalence with design considerations.

Parameter Comparison

Parameter	S2M-13 (Main)	S2M-13-F	S2M-LTP	S2M (MDD)	STTH208U
Manufacturer	Diodes Incorporated	Diodes Incorporated	Micro Commercial Co	MDD	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	800 V
Current - Average Rectified (Io)	1.5 A	1.5 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 1.5 A	1.15 V @ 2 A	1.15 V @ 2 A	1.65 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V	Not specified	5 µA @ 800 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	25 pF @ 4V, 1MHz	Not specified
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	SOD-214AC, SMA	DO-214AA, SMB
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

S2M-13-F (Diodes Incorporated): This part is the direct parametric equivalent of the S2M-13, offering identical electrical specifications and the same SMB package. The primary advantage is active product status and ROHS3 compliance, making it the preferred replacement for new designs and ongoing production. Packaging is available in Cut Tape and Digi-Reel formats.

S2M-LTP (Micro Commercial Co): This substitute provides enhanced current rating (2 A versus 1.5 A) while maintaining 1000 V reverse voltage and SMB package compatibility. The part features fast recovery characteristics and is ROHS3 compliant. The lower operating temperature minimum (-55°C versus -65°C) should be verified against application requirements.

S2M (MDD): This manufacturer-recommended alternative maintains 1000 V reverse voltage and 2 A current rating but uses the SMA package (SOD-214AC) instead of SMB. Physical package dimensions differ, requiring PCB layout verification. This option provides the highest inventory availability.

STTH208U (STMicroelectronics): This substitute has reduced reverse voltage rating (800 V versus 1000 V) and higher forward voltage drop (1.65 V @ 2 A versus 1.15 V @ 1.5 A). Selection of this part is appropriate only when circuit design permits the lower voltage rating and increased power dissipation. ROHS3 compliance and extended temperature range to 175°C are available.

Frequently Asked Questions (FAQ)

Q: Can S2M-13-F be used as a direct replacement for S2M-13?

A: Yes. The S2M-13-F is a parametric equivalent with identical voltage, current, and package specifications. The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.

Q: What are the implications of using S2M-LTP instead of S2M-13?

A: The S2M-LTP provides higher current capacity (2 A versus 1.5 A) and faster recovery time, making it suitable for the same application. The lower minimum operating temperature (-55°C versus -65°C) must be verified against system requirements. SMB package compatibility ensures direct PCB substitution.

Q: Why does STTH208U have a lower reverse voltage rating?

A: The STTH208U is rated for 800 V maximum reverse voltage compared to the S2M-13's 1000 V rating. This part is suitable only for applications where the circuit design operates below 800 V. The higher forward voltage drop (1.65 V) also increases power dissipation.

Q: What is the difference between SMB and SMA packages?

A: SMB (DO-214AA) and SMA (SOD-214AC) are different surface mount package types with different physical dimensions and footprints. While both are surface mount diode packages, PCB layout and component placement differ. Verify footprint compatibility before substituting S2M (MDD) in SMA package for SMB-packaged parts.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The original S2M-13 is RoHS non-compliant. Compliance verification may be required for specific procurement or regulatory requirements.

Q: What is the minimum operating temperature consideration for S2M-LTP?

A: The S2M-LTP has a minimum operating temperature of -55°C compared to the S2M-13's -65°C. Applications requiring operation below -55°C must use S2M-13-F or verify that the reduced temperature range is acceptable for the specific design.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: S2M-13-F and S2M-LTP are directly interchangeable in SMB package applications. S2M (MDD) requires PCB layout verification due to package type change. STTH208U is suitable only when the 800 V rating and higher forward voltage are acceptable for the circuit design.

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