SA2K-E3/5AT Equivalent & Substitute Parts

Part Overview

The SA2K-E3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 800 V DC reverse voltage with 2 A average rectified current in a DO-214AC (SMA) package. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the same package form factor and mounting technology, or when design requirements permit operation at different voltage or current ratings while maintaining circuit functionality.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 2 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	3	µA @ 800 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SA2K-E3/5AT are classified into two categories based on electrical parameter alignment:

Parametric Equivalent (Full Substitution): Parts that match all critical electrical specifications including voltage rating, current rating, forward voltage, and recovery characteristics. These parts are direct functional replacements.

Functional Equivalent (Conditional Substitution): Parts that operate at different voltage or current ratings but share the same package form factor (DO-214AC/SMA) and mounting technology (surface mount). These parts are suitable when circuit design permits operation at alternative electrical specifications.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): 800 V or higher
Current - Average Rectified (Io): 2 A or higher
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Package	Mounting	Tj (Max) [°C]	RoHS
SA2K-E3/5AT	Vishay General Semiconductor	800	2	1.1 @ 2 A	1.5	3 @ 800 V	DO-214AC	Surface Mount	150	ROHS3
SA2K-E3/61T	Vishay General Semiconductor	800	2	1.1 @ 2 A	1.5	3 @ 800 V	DO-214AC	Surface Mount	150	ROHS3
STTH108A	STMicroelectronics	800	1	1.65 @ 1 A	0.075	5 @ 800 V	DO-214AC	Surface Mount	175	ROHS3
STTH110A	STMicroelectronics	1000	1	1.7 @ 1 A	0.075	10 @ 1000 V	DO-214AC	Surface Mount	175	ROHS3
US1J-13-F	Diodes Incorporated	600	1	1.7 @ 1 A	0.075	5 @ 600 V	DO-214AC	Surface Mount	150	ROHS3
US1B-13-F	Diodes Incorporated	100	1	1.0 @ 1 A	0.050	5 @ 100 V	DO-214AC	Surface Mount	150	ROHS3
S1B-13-F	Diodes Incorporated	100	1	1.1 @ 1 A	3.0	5 @ 100 V	DO-214AC	Surface Mount	150	ROHS3

Engineering Selection Recommendations

SA2K-E3/61T (Parametric Equivalent): This Vishay part is a direct parametric equivalent to the SA2K-E3/5AT. All electrical specifications are identical, including 800 V reverse voltage, 2 A average rectified current, 1.1 V forward voltage at 2 A, and 1.5 µs reverse recovery time. Both parts are ROHS3 compliant with identical operating temperature ranges. This part is suitable for direct substitution without circuit redesign.

STTH108A (Functional Equivalent - Lower Current Rating): This STMicroelectronics part operates at 800 V reverse voltage but with 1 A average rectified current, representing a 50% reduction in current capacity. The part features faster recovery time (75 ns versus 1.5 µs) and higher maximum junction temperature (175°C). This part is suitable only when circuit current requirements do not exceed 1 A.

STTH110A (Functional Equivalent - Higher Voltage Rating): This STMicroelectronics part operates at 1000 V reverse voltage with 1 A average rectified current. The higher voltage rating provides additional design margin for high-voltage applications. The 1 A current rating requires verification against circuit requirements. Fast recovery characteristics (75 ns) and 175°C maximum junction temperature are provided.

US1J-13-F (Functional Equivalent - Lower Voltage Rating): This Diodes Incorporated part operates at 600 V reverse voltage with 1 A average rectified current. The reduced voltage rating is suitable only for applications where 600 V reverse voltage is sufficient. Fast recovery time (75 ns) is provided.

US1B-13-F and S1B-13-F (Functional Equivalent - Significantly Lower Voltage Rating): These Diodes Incorporated parts operate at 100 V reverse voltage with 1 A average rectified current. These parts are suitable only for low-voltage applications and do not provide equivalent performance for 800 V rated circuits.

All substitute parts maintain DO-214AC (SMA) package compatibility and surface mount mounting technology. All parts are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can SA2K-E3/61T be used as a direct replacement for SA2K-E3/5AT?

A: Yes. The SA2K-E3/61T is a parametric equivalent with identical electrical specifications across all critical parameters: 800 V reverse voltage, 2 A average rectified current, 1.1 V forward voltage at 2 A, and 1.5 µs reverse recovery time. Both parts use the same DO-214AC package and surface mount technology. No circuit modifications are required.

Q: What is the primary limitation when substituting STTH108A for SA2K-E3/5AT?

A: The STTH108A has a maximum average rectified current of 1 A, compared to 2 A for the SA2K-E3/5AT. This part is suitable only when circuit current requirements do not exceed 1 A. The 800 V reverse voltage rating is equivalent. Verify circuit current specifications before selection.

Q: Can US1J-13-F be used in an 800 V application?

A: No. The US1J-13-F has a maximum reverse voltage rating of 600 V. Using this part in an 800 V application would exceed its voltage specification and result in device failure. This part is suitable only for applications rated at 600 V or lower.

Q: Are all substitute parts compatible with the SA2K-E3/5AT package footprint?

A: Yes. All listed substitute parts use the DO-214AC (SMA) package form factor and surface mount mounting technology. PCB footprints are compatible. However, verify that circuit electrical requirements (voltage and current ratings) are met by the selected substitute part.

Q: What is the difference between SA2K-E3/5AT and SA2K-E3/61T packaging?

A: The SA2K-E3/5AT is supplied in Tape & Reel (TR) packaging, while SA2K-E3/61T is also supplied in Tape & Reel (TR) packaging. Both parts are electrically identical. The packaging designation reflects the supplier's distribution format. Component specifications and performance are equivalent.

Q: Do all substitute parts meet ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant. All parts carry REACH Unaffected status and EAR99 ECCN classification. All parts have unlimited moisture sensitivity rating (MSL 1).

Q: What recovery speed characteristics should be considered when selecting a substitute?

A: The SA2K-E3/5AT has standard recovery speed (>500 ns). STTH108A and STTH110A feature fast recovery (≤500 ns, 75 ns typical). US1J-13-F features fast recovery (≤500 ns, 75 ns typical). US1B-13-F features fast recovery (≤500 ns, 50 ns typical). S1B-13-F has standard recovery (>500 ns, 3 µs typical). Recovery speed affects switching characteristics and EMI performance. Select based on circuit switching frequency requirements.

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