1SS400 RKG Equivalent & Substitute Parts

Part Overview

The 1SS400 RKG is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-523F package. This component is classified as Active product status and complies with RoHS3 and REACH regulations. Substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 100 mA
Reverse Recovery Time (trr)	4 ns
Current - Reverse Leakage @ Vr	100 nA @ 80 V
Capacitance @ Vr, F	4 pF @ 500 mV, 1 MHz
Package / Case	SC-79, SOD-523
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Standard
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 1SS400 RKG are qualified based on the following criteria:

Electrical Parameter Matching:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 200 mA
Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 100 mA
Reverse Recovery Time (trr): 4 ns
Current - Reverse Leakage @ Vr: 100 nA @ 80 V
Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Compatibility:

Package / Case: SC-79, SOD-523
Mounting Type: Surface Mount
Supplier Device Package: SOD-523 or SOD-523F

Regulatory Compliance:

RoHS3 Compliant
REACH Unaffected
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain these core parameters. Packaging format variations (Tape & Reel, Cut Tape, Digi-Reel) do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Reverse Leakage @ Vr	Capacitance @ Vr, F	Package	Mounting Type	Temp Range	RoHS Status
1SS400 RKG	Taiwan Semiconductor Corporation	100 V	200 mA	1.2 V @ 100 mA	4 ns	100 nA @ 80 V	4 pF @ 500 mV, 1 MHz	SOD-523F	Surface Mount	-55°C ~ 150°C	RoHS3 Compliant
1SS400 RJG	Taiwan Semiconductor Corporation	100 V	200 mA	1.2 V @ 100 mA	4 ns	100 nA @ 80 V	4 pF @ 500 mV, 1 MHz	SOD-523F	Surface Mount	-55°C ~ 150°C	RoHS3 Compliant
1SS400T1G	onsemi	100 V	200 mA	1.2 V @ 100 mA	4 ns	100 nA @ 80 V	3 pF @ 0 V, 1 MHz	SOD-523	Surface Mount	-55°C ~ 150°C	RoHS3 Compliant
NSV1SS400T1G	onsemi	100 V	200 mA	1.2 V @ 100 mA	4 ns	100 nA @ 80 V	3 pF @ 0 V, 1 MHz	SOD-523	Surface Mount	-55°C ~ 150°C	RoHS3 Compliant
NSV1SS400T5G	onsemi	100 V	200 mA	1.2 V @ 100 mA	4 ns	100 nA @ 80 V	3 pF @ 0 V, 1 MHz	SOD-523	Surface Mount	-55°C ~ 150°C	RoHS3 Compliant

Engineering Selection Recommendations

1SS400 RJG (Taiwan Semiconductor Corporation) This part is a direct equivalent to the 1SS400 RKG from the same manufacturer with identical electrical specifications. The primary difference is packaging format (Tape & Reel versus standard packaging). Selection is appropriate for high-volume production environments where tape and reel format provides handling and assembly advantages. Product status is Active with full RoHS3 compliance.

1SS400T1G (onsemi) This onsemi-manufactured part meets all core electrical requirements with equivalent voltage, current, and switching characteristics. Capacitance specification differs slightly (3 pF versus 4 pF), which remains within acceptable tolerance for general-purpose rectification applications. Available in Cut Tape and Digi-Reel packaging formats. Product status is Active with RoHS3 compliance. Inventory availability is highest among substitute options at 43,370 pieces.

NSV1SS400T1G (onsemi) This automotive-grade variant from onsemi carries AEC-Q101 qualification, indicating suitability for automotive applications requiring enhanced reliability screening. Electrical specifications are identical to 1SS400T1G. Supplied in Tape & Reel format. Product status is Active with RoHS3 compliance. Selection is appropriate when automotive-grade qualification is a system requirement.

NSV1SS400T5G (onsemi) This automotive-grade variant from onsemi carries AEC-Q101 qualification with identical electrical specifications to NSV1SS400T1G. Supplied in Tape & Reel format. Product status is Active with RoHS3 compliance. Selection is appropriate for automotive applications requiring AEC-Q101 qualified components.

Frequently Asked Questions (FAQ)

Q: Can 1SS400T1G be used as a direct replacement for 1SS400 RKG?

A: Yes. Both parts meet identical electrical specifications for voltage rating (100 V), current rating (200 mA), forward voltage (1.2 V @ 100 mA), and reverse recovery time (4 ns). Both are surface mount SOD-523 package variants with matching operating temperature ranges (-55°C ~ 150°C). The minor capacitance difference (3 pF versus 4 pF) does not affect functional compatibility in standard rectification circuits.

Q: What is the difference between 1SS400 RJG and 1SS400 RKG?

A: These parts are electrically and mechanically identical. The primary difference is packaging format: 1SS400 RJG is supplied in Tape & Reel format while 1SS400 RKG uses standard packaging. Both are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications and RoHS3 compliance.

Q: When should NSV1SS400T1G or NSV1SS400T5G be selected?

A: These automotive-grade variants should be selected when system requirements specify AEC-Q101 qualification. Both parts carry automotive-grade designation and AEC-Q101 qualification, making them suitable for automotive applications requiring enhanced reliability screening and traceability. Electrical specifications are identical to standard-grade equivalents.

Q: Are there packaging compatibility considerations when substituting these parts?

A: All substitute parts use SOD-523 or SOD-523F surface mount packages with identical mechanical footprints (SC-79). Packaging format differences (Tape & Reel, Cut Tape, Digi-Reel) affect supply and handling but not circuit board assembly compatibility. Verify that your assembly process supports the selected packaging format.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All listed parts, including the main part 1SS400 RKG and all substitutes, have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The 1SS400 RKG and all identified substitute parts (1SS400 RJG, 1SS400T1G, NSV1SS400T1G, NSV1SS400T5G) are RoHS3 compliant and REACH unaffected, meeting current environmental regulations.

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