SK320A R3G Equivalent & Substitute Parts

Part Overview

The SK320A R3G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-214AC (SMA) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The SK320A R3G operates across a junction temperature range of -55°C to 150°C with a forward voltage of 950 mV at 3 A and exhibits fast recovery characteristics (≤500 ns). RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) qualify this component for industrial and commercial applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 200 V
Technology	Schottky
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SK320A R3G is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Current - Average Rectified (Io): 3 A minimum
Technology: Schottky
Package / Case: DO-214AC (SMA) or compatible surface mount package
Mounting Type: Surface Mount
Speed: Fast Recovery ≤500 ns, >200 mA (Io)
RoHS Status: ROHS3 Compliant

Parametric Equivalents are parts that match all critical parameters identically, including voltage rating, current rating, package type, and performance characteristics. These parts are direct replacements with no design modifications required.

Similar Parts are components that share the same voltage rating and package but differ in current rating, forward voltage characteristics, or reverse leakage specifications. These parts require circuit evaluation to confirm suitability based on application-specific current demands and thermal considerations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Product Status	Temp Range [°C]
SK320A R3G	Taiwan Semiconductor Corporation	200	3	950 @ 3 A	100 @ 200 V	DO-214AC (SMA)	Discontinued	-55 to 150
SK320A	Taiwan Semiconductor Corporation	200	3	950 @ 3 A	100 @ 200 V	DO-214AC (SMA)	Active	-55 to 150
SK320AH	Taiwan Semiconductor Corporation	200	3	950 @ 3 A	100 @ 200 V	DO-214AC (SMA)	Active	-55 to 150
CDBA3200-HF	Comchip Technology	200	3	900 @ 3 A	500 @ 200 V	DO-214AC (SMA)	Active	-50 to 175
CDBA2200-HF	Comchip Technology	200	2	900 @ 2 A	500 @ 200 V	DO-214AC (SMA)	Active	-55 to 150
CDBA5200-HF	Comchip Technology	200	5	900 @ 5 A	500 @ 200 V	DO-214AC (SMA)	Active	-50 to 175
SS1200-LTP	Micro Commercial Co	200	1	920 @ 1 A	50 @ 200 V	DO-214AC (SMA)	Active	-50 to 150
SS320F-HF	Comchip Technology	200	3	950 @ 3 A	300 @ 200 V	DO-214AC (SMA) / SMAF	Active	-55 to 150

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

The SK320A and SK320AH from Taiwan Semiconductor Corporation are parametric equivalents to the SK320A R3G. Both parts maintain identical electrical specifications: 200 V reverse voltage, 3 A average rectified current, 950 mV forward voltage at 3 A, and 100 µA reverse leakage at 200 V. Both are active products with RoHS3 compliance and MSL 1 rating. The SK320AH includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability.

Comchip Technology CDBA3200-HF:

The CDBA3200-HF is a parametric equivalent in terms of voltage and current ratings (200 V, 3 A) and package type (DO-214AC SMA). This part exhibits lower forward voltage (900 mV vs. 950 mV at 3 A) and higher reverse leakage (500 µA vs. 100 µA at 200 V). The extended operating temperature range (-50°C to 175°C) provides thermal margin beyond the original specification. This part is suitable for applications where lower forward voltage drop is beneficial and reverse leakage characteristics are acceptable.

Comchip Technology SS320F-HF:

The SS320F-HF maintains identical voltage rating, current rating, and forward voltage specification (200 V, 3 A, 950 mV @ 3 A) with matching operating temperature range (-55°C to 150°C). The package designation includes SMAF variant, which is mechanically compatible with DO-214AC (SMA) footprints. Reverse leakage is 300 µA at 200 V, intermediate between the original part and other alternatives. This part is suitable for direct substitution where package compatibility is confirmed.

Current-Rated Alternatives:

The CDBA2200-HF (2 A) and CDBA5200-HF (5 A) are available for applications where current requirements differ from the 3 A specification. The CDBA5200-HF provides current margin for designs requiring higher current capacity. The CDBA2200-HF is suitable only for applications with maximum current requirements not exceeding 2 A.

Lower Current Alternative:

The SS1200-LTP (1 A) is suitable only for applications with maximum current requirements not exceeding 1 A. This part exhibits the lowest reverse leakage (50 µA at 200 V) among all alternatives.

Frequently Asked Questions (FAQ)

Q: Can SK320A R3G be directly replaced with SK320A?

A: Yes. The SK320A is a parametric equivalent with identical electrical specifications (200 V, 3 A, 950 mV forward voltage, 100 µA reverse leakage) and package type (DO-214AC SMA). The primary difference is product status: SK320A is active while SK320A R3G is discontinued. No circuit modifications are required.

Q: What is the difference between SK320A and SK320AH?

A: Both parts are parametric equivalents with identical electrical specifications and package type. The SK320AH includes AEC-Q101 automotive qualification and is designated for automotive-grade applications. Selection between these parts depends on application requirements for automotive compliance.

Q: Can CDBA3200-HF replace SK320A R3G?

A: CDBA3200-HF is a parametric equivalent in voltage (200 V) and current (3 A) ratings with the same package type (DO-214AC SMA). However, it exhibits lower forward voltage (900 mV vs. 950 mV at 3 A) and higher reverse leakage (500 µA vs. 100 µA at 200 V). Circuit evaluation is required to confirm these characteristic differences are acceptable for the specific application.

Q: What is the difference between DO-214AC (SMA) and SMAF packages?

A: Both are surface mount packages for Schottky diodes. DO-214AC (SMA) and SMAF are mechanically compatible footprints. The SS320F-HF is available in SMAF variant and is suitable for applications using either footprint designation.

Q: Can I use CDBA5200-HF (5 A) in place of SK320A R3G (3 A)?

A: CDBA5200-HF is rated for 5 A average rectified current, exceeding the 3 A requirement of SK320A R3G. This part is suitable for applications where current capacity margin is desired. The 200 V voltage rating and DO-214AC (SMA) package are identical. Forward voltage is 900 mV at 5 A, and reverse leakage is 500 µA at 200 V. Circuit evaluation is required to confirm these characteristics are acceptable.

Q: Can I use SS1200-LTP (1 A) in place of SK320A R3G (3 A)?

A: No. SS1200-LTP is rated for maximum 1 A average rectified current, which is insufficient for applications requiring 3 A. This part is suitable only for applications with maximum current requirements not exceeding 1 A.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity level rating, matching the environmental compliance profile of SK320A R3G.

Q: What is the operating temperature range difference between SK320A R3G and CDBA3200-HF?

A: SK320A R3G operates from -55°C to 150°C junction temperature. CDBA3200-HF operates from -50°C to 175°C, providing extended upper temperature margin of 25°C. Selection depends on application thermal requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message