Equivalent & Substitute Parts for S1M/1 General Purpose Rectifier Diode

Part Overview

The S1M/1 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new procurement and design continuity. Equivalent parts must maintain electrical performance within the specified operating parameters while meeting current manufacturing and compliance standards.

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
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	1.8	µs
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the S1M/1 is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: 1.1 V or lower @ 1 A
Mounting Type: Surface Mount
Package / Case: DO-214AC or SMA

Secondary Compatibility Factors:

Operating Temperature Range: -55°C to 150°C minimum
Reverse Recovery Time (trr): ≤2 µs preferred
Current - Reverse Leakage @ Vr: ≤10 µA @ rated voltage
RoHS Compliance: ROHS3 Compliant preferred for new designs

Parts are grouped into three categories:

Category 1 - Full Electrical Equivalents (1000 V, 1 A): Parts meeting all primary criteria with identical voltage and current ratings.

Category 2 - Reduced Voltage Alternatives (800 V or 600 V): Parts with lower reverse voltage ratings suitable only for applications not requiring full 1000 V rating.

Category 3 - Legacy/Automotive Grade: Parts with extended temperature ranges or automotive qualification (AEC-Q101) for specialized applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Tj (°C)	Product Status	RoHS Status
S1M/1	Vishay General Semiconductor	1000	1	1.1 @ 1 A	1.8	5 @ 1000 V	-55 to 150	Obsolete	Non-compliant
CGRA4007-G	Comchip Technology	1000	1	1.1 @ 1 A	—	5 @ 1000 V	-55 to 150	Active	ROHS3 Compliant
S1M	EVVO Semi	1000	1	1.1 @ 1 A	—	5 @ 1 kV	-55 to 150	Active	ROHS3 Compliant
GF1M	onsemi	1000	1	1.2 @ 1 A	2	5 @ 1000 V	-65 to 175	Not For New Designs	ROHS3 Compliant
GS1M-LTP	Micro Commercial Co	1000	1	1.0 @ 1 A	—	10 @ 1000 V	-55 to 150	Active	ROHS3 Compliant
MRA4006T3G	onsemi	800	1	1.1 @ 1 A	—	10 @ 800 V	-55 to 175	Not For New Designs	ROHS3 Compliant
MRA4007T3G	onsemi	1000	1	1.1 @ 1 A	—	10 @ 1000 V	-55 to 175	Not For New Designs	ROHS3 Compliant
NRVA4007T3G	onsemi	1000	1	1.1 @ 1 A	—	10 @ 1000 V	-55 to 150	Not For New Designs	ROHS3 Compliant
S1J-13-F	Diodes Incorporated	600	1	1.1 @ 1 A	3	5 @ 600 V	-65 to 150	Active	ROHS3 Compliant
S1K	YAGEO	800	1	1.1	—	—	—	Active	ROHS3 Compliant
S1K-13-F	Diodes Incorporated	800	1	1.1 @ 1 A	3	5 @ 800 V	-65 to 150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes (Full 1000 V Equivalents):

CGRA4007-G (Comchip Technology) — Active product status with identical electrical specifications to S1M/1. ROHS3 compliant. Tape & Reel packaging provides high-volume procurement compatibility. Recommended for direct replacement in new designs.
S1M (EVVO Semi) — Active product status with matching 1000 V / 1 A ratings and forward voltage specification. ROHS3 compliant. Available in Cut Tape and Digi-Reel packaging. Suitable for immediate substitution.
GS1M-LTP (Micro Commercial Co) — Active product status with superior forward voltage performance (1.0 V @ 1 A vs. 1.1 V). ROHS3 compliant. Recommended for applications requiring lower forward voltage drop and reduced power dissipation.

Secondary Substitutes (Extended Temperature or Legacy Status):

MRA4007T3G (onsemi) — Matches 1000 V / 1 A electrical requirements with extended operating temperature range (-55°C to 175°C). Product status is "Not For New Designs," limiting use to legacy system maintenance or replacement applications only.
NRVA4007T3G (onsemi) — Automotive-grade 1000 V / 1 A diode with AEC-Q101 qualification. Suitable for automotive and high-reliability applications. Product status is "Not For New Designs" for general commercial use.

Reduced Voltage Alternatives (800 V or 600 V):

S1K-13-F (Diodes Incorporated) — 800 V rated alternative with 1 A current rating and active product status. Suitable only for applications where 800 V reverse voltage rating is sufficient.
S1J-13-F (Diodes Incorporated) — 600 V rated alternative with 1 A current rating and active product status. Suitable only for applications where 600 V reverse voltage rating is sufficient.

Selection Priority for New Designs:

First choice: CGRA4007-G or S1M (full electrical equivalence, active status, ROHS3 compliant)
Second choice: GS1M-LTP (active status, superior forward voltage performance)
Reduced voltage alternatives only when application voltage requirements permit

Frequently Asked Questions (FAQ)

Q: Can I use an 800 V rated diode (S1K-13-F or MRA4006T3G) as a direct replacement for the S1M/1 (1000 V rated)?

A: No. The S1M/1 is rated for 1000 V reverse voltage. Using an 800 V rated diode creates risk of diode failure if reverse voltage exceeds 800 V. Substitution to lower voltage ratings is only acceptable when the application circuit design guarantees that reverse voltage will not exceed the substitute part's rating.

Q: What is the difference between "Active" and "Not For New Designs" product status?

A: "Active" status indicates the manufacturer continues production and supports the part for new designs. "Not For New Designs" indicates the manufacturer has discontinued active support but may still supply existing inventory. For new product development, select only parts with "Active" status to ensure long-term supply chain reliability.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original S1M/1 is RoHS non-compliant. Substitution to any ROHS3-compliant equivalent part satisfies modern environmental and regulatory requirements.

Q: Does the forward voltage difference between GS1M-LTP (1.0 V) and S1M/1 (1.1 V) affect circuit performance?

A: Forward voltage differences of 0.1 V are within typical circuit design margins for rectifier applications. The GS1M-LTP offers lower power dissipation due to reduced forward voltage drop. Verify that your circuit design does not depend on specific forward voltage characteristics before substitution.

Q: Can I substitute the S1M/1 with NRVA4007T3G for non-automotive applications?

A: NRVA4007T3G is automotive-grade with AEC-Q101 qualification. While electrically equivalent to S1M/1, it is designated "Not For New Designs" for general commercial use. Use CGRA4007-G, S1M, or GS1M-LTP for non-automotive applications.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel. All maintain the same DO-214AC (SMA) component package. Verify packaging compatibility with your assembly equipment before procurement.

Q: Is reverse recovery time (trr) critical for substitution?

A: Reverse recovery time affects switching performance in high-frequency applications. The S1M/1 specifies 1.8 µs trr. Substitute parts with higher trr values (2–3 µs) are acceptable for standard rectification applications but may introduce additional switching losses in high-frequency circuits. Verify trr specifications for your specific application frequency.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: Yes, provided all selected parts meet the minimum electrical requirements (1000 V, 1 A, ≤1.1 V forward voltage). However, for production consistency and supply chain management, select a single primary substitute and identify one secondary option for contingency.

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