S1M-13 Equivalent & Substitute Parts

Part Overview

The S1M-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This component is classified as discontinued at DiGi Electronics, indicating that direct procurement of the original part number is no longer available through standard distribution channels. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure uninterrupted supply for production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Reverse Recovery Time (trr)	3	µs
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65°C ~ 150°C	—
Technology	Standard	—
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	—

Substitute Part Grouping Explanation

Substitution of the S1M-13 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
Package / Case: DO-214AC, SMA
Technology: Standard

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.1 V @ 1 A (or within acceptable circuit tolerance)
Reverse Recovery Time (trr): ≤ 3 µs (standard recovery classification)
Current - Reverse Leakage @ Vr: ≤ 5 µA @ 1000 V
Operating Temperature - Junction: Must encompass or exceed -65°C ~ 150°C range

Substitute parts are grouped into two categories:

Category A - Direct Parametric Equivalents: Parts meeting all mandatory criteria with identical or superior electrical performance and active product status.

Category B - Functional Equivalents: Parts meeting all mandatory criteria with minor variations in secondary parameters or alternative product status classifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs/ns]	Ir @ Vr [µA]	Temp Range [°C]	Product Status	RoHS Status
S1M-13	Diodes Incorporated	1000	1	1.1 @ 1A	3 µs	5 @ 1000V	-65 ~ 150	Discontinued	Non-compliant
S1M-13-F	Diodes Incorporated	1000	1	1.1 @ 1A	3 µs	5 @ 1000V	-65 ~ 150	Active	ROHS3 Compliant
CGRA4007-G	Comchip Technology	1000	1	1.1 @ 1A	Standard >500ns	5 @ 1000V	-55 ~ 150	Active	ROHS3 Compliant
CURA107-G	Comchip Technology	1000	1	1.7 @ 1A	75 ns	5 @ 1000V	-55 ~ 150	Active	ROHS3 Compliant
GF1M	onsemi	1000	1	1.2 @ 1A	2 µs	5 @ 1000V	-65 ~ 175	Not For New Designs	ROHS3 Compliant
GS1M-LTP	Micro Commercial Co	1000	1	1.0 @ 1A	Standard >500ns	10 @ 1000V	-55 ~ 150	Active	ROHS3 Compliant
MRA4007T3G	onsemi	1000	1	1.1 @ 1A	Standard >500ns	10 @ 1000V	-55 ~ 175	Not For New Designs	ROHS3 Compliant
NRVA4007T3G	onsemi	1000	1	1.1 @ 1A	Standard >500ns	10 @ 1000V	-55 ~ 150	Not For New Designs	ROHS3 Compliant
RGF1M	onsemi	1000	1	1.3 @ 1A	500 ns	5 @ 1000V	-65 ~ 175	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: S1M-13-F

The S1M-13-F from Diodes Incorporated is the direct parametric equivalent of the S1M-13. This part maintains identical electrical specifications across all critical parameters: 1000 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage drop, and 3 µs reverse recovery time. The S1M-13-F is currently in active product status with ROHS3 compliance, addressing the regulatory limitation of the original discontinued part. Inventory availability is substantial at 190,400 pieces. This part is the preferred substitution path for direct replacement without circuit redesign.

Secondary Recommendations: CGRA4007-G and GS1M-LTP

CGRA4007-G (Comchip Technology) and GS1M-LTP (Micro Commercial Co) are functionally equivalent alternatives with active product status and ROHS3 compliance. Both maintain the 1000 V / 1 A rating and standard recovery characteristics. CGRA4007-G exhibits identical forward voltage performance (1.1 V @ 1 A). GS1M-LTP offers superior forward voltage characteristics (1.0 V @ 1 A), which may provide marginal thermal benefits in power-limited applications. Both parts are suitable for new designs and production applications.

Alternative Consideration: MRA4007T3G

MRA4007T3G (onsemi) meets all mandatory electrical equivalence criteria with 1000 V reverse voltage and 1 A current rating. However, this part carries a "Not For New Designs" product status designation. This part is appropriate for legacy system maintenance and repair applications where supply continuity is prioritized over design modernization. Inventory availability is high at 425,100 pieces.

Not Recommended: CURA107-G and RGF1M

CURA107-G exhibits elevated forward voltage (1.7 V @ 1 A) and fast recovery characteristics (75 ns), which represent a departure from the standard recovery profile of the S1M-13. RGF1M similarly deviates with fast recovery (500 ns) and elevated forward voltage (1.3 V @ 1 A). These parts introduce circuit behavior changes and are suitable only for applications where fast recovery performance is specifically required.

Not Recommended: GF1M and NRVA4007T3G

GF1M and NRVA4007T3G carry "Not For New Designs" status. While electrically compatible, these parts are designated for legacy support only and should not be selected for new production applications.

Frequently Asked Questions (FAQ)

Q: Can S1M-13-F be used as a direct drop-in replacement for S1M-13?

A: Yes. S1M-13-F is a direct parametric equivalent with identical voltage rating (1000 V), current rating (1 A), forward voltage (1.1 V @ 1 A), and reverse recovery time (3 µs). The parts are pin-compatible in the DO-214AC SMA package. No circuit modifications are required.

Q: What is the difference between S1M-13 and S1M-13-F?

A: The primary difference is product status and regulatory compliance. S1M-13 is discontinued and RoHS non-compliant. S1M-13-F is active and ROHS3 compliant. Electrical performance is identical.

Q: Why is CURA107-G not recommended as a substitute?

A: CURA107-G is classified as an ultrafast diode with 75 ns reverse recovery time and 1.7 V forward voltage drop. These parameters differ significantly from the S1M-13 standard recovery profile (3 µs, 1.1 V). Substitution would alter circuit switching behavior and thermal characteristics, requiring circuit validation.

Q: Are all substitute parts available in the same SMA package?

A: Yes. All listed substitute parts are housed in the DO-214AC SMA surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: What is the significance of "Not For New Designs" product status?

A: Parts designated "Not For New Designs" are in mature or end-of-life phases. These parts remain available for legacy system support and repair but should not be selected for new product development. For new designs, select parts with "Active" status such as S1M-13-F, CGRA4007-G, or GS1M-LTP.

Q: Can I use MRA4007T3G in a new production application?

A: MRA4007T3G is electrically equivalent but carries "Not For New Designs" status. While technically suitable for new applications, this designation indicates the manufacturer does not recommend it for new designs. S1M-13-F, CGRA4007-G, or GS1M-LTP are preferred alternatives for new production.

Q: What is the operating temperature range difference between S1M-13 and substitute parts?

A: S1M-13 operates from -65°C to 150°C. Most substitute parts operate from -55°C to 150°C or -55°C to 175°C. For applications requiring the full -65°C lower limit, select GF1M, RGF1M, or S1M-13-F, which maintain the -65°C minimum junction temperature.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are ROHS3 compliant. The original S1M-13 is RoHS non-compliant. If RoHS compliance is a design requirement, any of the substitute parts satisfy this criterion.

Q: What is the difference in reverse leakage current between substitute parts?

A: S1M-13 specifies 5 µA @ 1000 V. GS1M-LTP and MRA4007T3G specify 10 µA @ 1000 V. This difference is negligible for most applications. For applications with strict leakage requirements, select S1M-13-F, CGRA4007-G, RGF1M, or NRVA4007T3G, which maintain 5 µA leakage specification.

Q: Can I substitute a lower voltage rated diode such as MRA4006T3G (800 V)?

A: No. MRA4006T3G is rated for 800 V maximum reverse voltage, which is below the 1000 V requirement of the S1M-13. Substitution with a lower voltage part creates risk of diode failure under reverse bias conditions and is not permitted.

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