SA2D-E3/5AT Equivalent & Substitute Parts

Part Overview

The SA2D-E3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 200 V DC reverse voltage with a 2 A average rectified current rating. The device is housed in a DO-214AC (SMA) package and is classified as Active product status. Equivalent and substitute parts are identified to address inventory availability, supply chain continuity, and application-specific performance requirements while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	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 @ 200 V
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

Substitute parts for the SA2D-E3/5AT are classified into the following categories based on electrical parameter compatibility:

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

Direct Manufacturer Equivalent (Performance Upgrade): Parts that exceed or match the primary electrical specifications but may feature improved performance characteristics such as faster recovery time or lower forward voltage drop. These parts are electrically compatible and suitable for direct substitution.

Current-Reduced Alternatives: Parts with lower average rectified current ratings (1 A or 1.5 A versus 2 A). These parts are suitable only for applications where the circuit current demand does not exceed the substitute part's rating.

Key substitution criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 200 V
Package / Case must be DO-214AC or SMA (equivalent form factor)
Mounting Type must be Surface Mount
RoHS3 Compliance and MSL 1 rating required
Operating temperature range must accommodate application requirements

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Inventory [Pcs]
SA2D-E3/5AT	Vishay	200	2	1.1 @ 2A	1.5 µs	3 @ 200V	DO-214AC	-55 to 150	2,340
SA2D-E3/61T	Vishay	200	2	1.1 @ 2A	1.5 µs	3 @ 200V	DO-214AC	-55 to 150	30,300
STTH2R02A	STMicroelectronics	200	2	1.0 @ 2A	30 ns	3 @ 200V	DO-214AC	-55 to 175	116,664
ES2DA-13-F	Diodes Incorporated	200	2	0.92 @ 2A	25 ns	5 @ 200V	DO-214AC	-55 to 150	56,754
RS1D	Taiwan Semiconductor	200	1	1.3 @ 1A	150 ns	5 @ 200V	DO-214AC	-55 to 150	20,200
STTH102A	STMicroelectronics	200	1	0.97 @ 1A	20 ns	1 @ 200V	DO-214AC	-55 to 175	10,300
STTH102AY	STMicroelectronics	200	1	0.97 @ 1A	20 ns	1 @ 200V	DO-214AC	-40 to 175	31,190
STTH1R02A	STMicroelectronics	200	1.5	1.0 @ 1.5A	30 ns	3 @ 200V	DO-214AC	-55 to 175	1,634
US1D-TP	Micro Commercial Co	200	1	1.0 @ 1A	50 ns	10 @ 200V	DO-214AC	-65 to 175	3,400

Engineering Selection Recommendations

Full Parametric Equivalent: SA2D-E3/61T is a direct parametric equivalent to SA2D-E3/5AT, manufactured by the same supplier (Vishay) with identical electrical specifications. This part is suitable for direct substitution with no circuit modifications required. Higher inventory availability (30,300 pcs) supports supply chain continuity.

Performance-Enhanced 2 A Alternatives: STTH2R02A (STMicroelectronics) and ES2DA-13-F (Diodes Incorporated) both maintain the 200 V / 2 A electrical envelope while offering improved performance characteristics. STTH2R02A features faster recovery time (30 ns versus 1.5 µs) and lower forward voltage (1.0 V versus 1.1 V). ES2DA-13-F provides the lowest forward voltage (0.92 V) with fast recovery (25 ns). Both parts are ROHS3 compliant and MSL 1 rated. Selection between these alternatives depends on application sensitivity to switching losses and thermal performance requirements.

Current-Reduced Alternatives (1 A Rating): STTH102A, STTH102AY, RS1D, and US1D-TP are suitable only for applications where circuit current demand does not exceed 1 A. STTH102AY includes automotive-grade qualification (-40°C to 175°C operating range) and is appropriate for automotive applications. STTH102A and STTH102AY feature superior reverse leakage characteristics (1 µA versus 3 µA) and fast recovery times (20 ns).

Intermediate Current Alternative (1.5 A Rating): STTH1R02A provides an intermediate current rating (1.5 A) suitable for applications requiring higher current capacity than 1 A alternatives but lower than the original 2 A specification. This part features fast recovery (30 ns) and is appropriate for circuits with moderate current demands.

All substitute parts maintain DO-214AC (SMA) package compatibility, surface mount mounting type, ROHS3 compliance, and MSL 1 moisture sensitivity rating. Operating temperature ranges vary; applications requiring the full -55°C to 150°C range of the original part should verify substitute part temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can SA2D-E3/61T be used as a direct replacement for SA2D-E3/5AT? A: Yes. SA2D-E3/61T is a parametric equivalent manufactured by Vishay with identical electrical specifications (200 V, 2 A, 1.1 V forward voltage, 1.5 µs recovery time) and package configuration (DO-214AC). No circuit modifications are required.

Q: What is the difference between STTH2R02A and the original SA2D-E3/5AT? A: Both parts maintain 200 V / 2 A ratings and DO-214AC packaging. STTH2R02A features faster reverse recovery time (30 ns versus 1.5 µs) and lower forward voltage (1.0 V versus 1.1 V), resulting in reduced switching losses and improved thermal performance. Maximum operating temperature is 175°C versus 150°C for the original part.

Q: Can 1 A rated parts (STTH102A, RS1D, US1D-TP) replace the 2 A SA2D-E3/5AT? A: Only if the application circuit current does not exceed 1 A. These parts are not suitable for circuits designed to operate at 2 A. Using an undersized current rating creates risk of component thermal stress and failure.

Q: What is the advantage of ES2DA-13-F over SA2D-E3/5AT? A: ES2DA-13-F maintains the 200 V / 2 A electrical envelope while offering lower forward voltage (0.92 V versus 1.1 V) and faster recovery time (25 ns versus 1.5 µs). These characteristics reduce power dissipation and switching losses in rectification circuits.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the original SA2D-E3/5AT.

Q: What is the difference between STTH102A and STTH102AY? A: Both parts are electrically identical (200 V, 1 A, 0.97 V forward voltage, 20 ns recovery). STTH102AY includes automotive-grade qualification with operating temperature range -40°C to 175°C and Series Q designation. STTH102A operates -55°C to 175°C. STTH102AY is appropriate for automotive applications; STTH102A is suitable for industrial and commercial applications.

Q: Is the DO-214AC package equivalent to SMA? A: Yes. DO-214AC and SMA designations refer to the same surface mount package form factor. Parts specified with either designation are mechanically and electrically compatible for PCB mounting.

Q: What does reverse recovery time (trr) indicate? A: Reverse recovery time is the interval required for a diode to transition from forward conduction to reverse blocking state. Faster recovery times (measured in nanoseconds) reduce switching losses and electromagnetic interference. Standard recovery diodes exhibit trr in the microsecond range; fast recovery diodes exhibit trr in the nanosecond range.

Q: Can STTH1R02A (1.5 A) be used in place of SA2D-E3/5AT (2 A)? A: STTH1R02A is suitable only for applications where circuit current does not exceed 1.5 A. For circuits designed to operate at 2 A, this part is undersized and creates thermal stress risk.

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