S1K-13 Equivalent & Substitute Parts

Part Overview

The S1K-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This part features standard recovery characteristics with a reverse recovery time of 3 µs and operates across a junction temperature range of -65°C to 150°C.

The S1K-13 is discontinued at DiGi Electronics and carries RoHS non-compliant status. Equivalent and substitute parts are necessary for ongoing production requirements, design updates, and compliance with current regulatory standards. Active alternatives with identical or superior electrical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	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 @ 800 V
Capacitance @ Vr, F	10	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitute parts for the S1K-13 are grouped based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC, SMA (surface mount)
Mounting Type: Surface Mount
Technology: Standard or Fast Recovery

Grouping Logic:

Group 1 — Direct Electrical Equivalents (800 V, 1 A, Standard Recovery): Parts with identical voltage and current ratings, standard recovery characteristics, and matching package specifications. These parts are pin-compatible and electrically interchangeable with the S1K-13.

Group 2 — Enhanced Voltage Rating (1000 V, 1 A): Parts with higher reverse voltage ratings (1000 V) while maintaining 1 A current capacity. These parts provide superior voltage margin and are backward-compatible in 800 V applications.

Group 3 — Fast Recovery Technology (800 V, 1 A): Parts with faster recovery characteristics (≤500 ns) compared to the S1K-13 standard recovery (3 µs). These parts offer improved switching performance while maintaining voltage and current specifications.

Substitution is permitted when the substitute part meets or exceeds the S1K-13 electrical specifications and maintains the same surface mount package format.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
S1K-13	Diodes Incorporated	800	1	1.1 @ 1 A	3	5 @ 800 V	DO-214AC, SMA	Discontinued	Non-compliant
S1K_HF	Diodes Incorporated	800	1	1.1 @ 1 A	3	5 @ 800 V	DO-214AC, SMA	Active	ROHS3 Compliant
S1K-13-F	Diodes Incorporated	800	1	1.1 @ 1 A	3	5 @ 800 V	DO-214AC, SMA	Active	ROHS3 Compliant
GS1M-LTP	Micro Commercial Co	1000	1	1.0 @ 1 A	—	10 @ 1000 V	DO-214AC, SMA	Active	ROHS3 Compliant
MRA4006T3G	onsemi	800	1	1.1 @ 1 A	—	10 @ 800 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
MRA4007T3G	onsemi	1000	1	1.1 @ 1 A	—	10 @ 1000 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
RGF1K	onsemi	800	1	1.3 @ 1 A	0.5	5 @ 800 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
RS1K	Fairchild Semiconductor	800	1	1.3 @ 1 A	0.5	5 @ 800 V	DO-214AC, SMA	Active	—
RS1K-E3/5AT	Vishay General Semiconductor - Diodes Division	800	1	1.3 @ 1 A	0.5	5 @ 800 V	DO-214AC, SMA	Active	ROHS3 Compliant
RS1K-E3/61T	Vishay General Semiconductor - Diodes Division	800	1	1.3 @ 1 A	0.5	5 @ 800 V	DO-214AC, SMA	Active	ROHS3 Compliant
RS1K_R1_00001	Panjit International Inc.	800	1	1.3 @ 1 A	0.5	1 @ 800 V	DO-214AC, SMA	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Current Compliance:

The S1K_HF and S1K-13-F, both manufactured by Diodes Incorporated, are the primary recommended substitutes. These parts maintain identical electrical specifications to the S1K-13 (800 V, 1 A, standard recovery, 3 µs trr) while offering ROHS3 compliance and active product status. S1K-13-F provides the highest inventory availability (215,900 units) and is suitable for new designs.

For Enhanced Voltage Margin Applications:

The GS1M-LTP (Micro Commercial Co) and MRA4007T3G (onsemi) provide 1000 V reverse voltage rating while maintaining 1 A current capacity. These parts are backward-compatible in 800 V circuits and offer superior voltage headroom. GS1M-LTP is recommended for new designs due to active product status and ROHS3 compliance.

For Fast Recovery Performance:

The RS1K-E3/61T (Vishay General Semiconductor - Diodes Division) and RS1K-E3/5AT offer fast recovery characteristics (0.5 µs trr) compared to the S1K-13 standard recovery (3 µs). These parts are suitable for applications requiring improved switching speed while maintaining 800 V, 1 A specifications. Both are ROHS3 compliant and active products.

Compliance Considerations:

All recommended substitutes carry ROHS3 compliance status, addressing the non-compliant status of the discontinued S1K-13. Parts designated "Not For New Designs" (MRA4006T3G, MRA4007T3G, RGF1K) are available for legacy system support but should not be selected for new product development.

Frequently Asked Questions (FAQ)

Q: Can the S1K_HF directly replace the S1K-13 without circuit modification?

A: Yes. The S1K_HF maintains identical electrical specifications (800 V, 1 A, 1.1 V forward voltage, 3 µs recovery time) and the same DO-214AC surface mount package. No circuit changes are required.

Q: What is the primary advantage of selecting S1K-13-F over S1K_HF?

A: S1K-13-F offers significantly higher inventory availability (215,900 units versus 669 units) and is the parametric equivalent with identical specifications. Both are ROHS3 compliant and active products.

Q: Are fast recovery diodes (RS1K-E3/61T, RS1K-E3/5AT) suitable replacements for the S1K-13?

A: Fast recovery diodes are electrically compatible substitutes for 800 V, 1 A applications. The reduced recovery time (0.5 µs versus 3 µs) improves switching performance and reduces switching losses. They are suitable for applications where faster recovery is beneficial or neutral. Verify circuit design does not depend on the slower recovery characteristics of the S1K-13.

Q: Can I use a 1000 V rated diode (GS1M-LTP, MRA4007T3G) in place of the 800 V S1K-13?

A: Yes. Higher voltage-rated diodes are backward-compatible in lower voltage applications. The 1000 V parts provide additional voltage margin and are suitable for 800 V circuits. This substitution is recommended when enhanced reliability margin is desired.

Q: What is the difference between the S1K_HF and S1K-13-F?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications. S1K_HF is packaged in Tape & Reel format, while S1K-13-F is also Tape & Reel packaged. S1K-13-F has significantly higher inventory availability and is designated as the parametric equivalent.

Q: Are there any temperature range differences between substitute parts?

A: The S1K-13 operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C or -55°C to 175°C. Verify the application's minimum operating temperature requirement. If operation below -55°C is required, the S1K_HF or S1K-13-F maintain the -65°C lower limit.

Q: What does "Not For New Designs" status mean for MRA4006T3G, MRA4007T3G, and RGF1K?

A: Parts with "Not For New Designs" status are available for existing product support and legacy system maintenance but should not be selected for new product development. These parts may have limited future availability or manufacturer support. Prioritize active status parts for new designs.

Q: Is RoHS compliance mandatory for my application?

A: RoHS3 compliance is required for products sold in the European Union and many other markets. The S1K-13 is RoHS non-compliant. All recommended active substitutes (S1K_HF, S1K-13-F, GS1M-LTP, RS1K-E3/61T, RS1K-E3/5AT, RS1K_R1_00001) are ROHS3 compliant. Verify regulatory requirements for your target market.

Q: Can I mix different substitute parts in the same production batch?

A: All recommended substitutes are pin-compatible and electrically equivalent within the specified parameters. However, manufacturing consistency and traceability practices typically recommend standardizing on a single part number per design. Consult your quality and procurement procedures.

Q: What is the significance of the reverse leakage current (Ir) differences between parts?

A: The S1K-13 specifies 5 µA @ 800 V reverse leakage. Most substitutes specify 5-10 µA @ 800 V. The RS1K_R1_00001 specifies only 1 µA @ 800 V, indicating superior leakage performance. Lower reverse leakage reduces standby power consumption and improves high-temperature stability. Select based on application requirements.

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