Equivalent & Substitute Parts for RS1A-E3/5AT

Part Overview

The RS1A-E3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 50 V DC reverse voltage with 1 A average rectified current in a DO-214AC (SMA) package. The part is classified as Active and fully compliant with RoHS3 and REACH regulations.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design specifications permit operation with components having different electrical characteristics within acceptable parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Capacitance @ Vr, F	10	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RS1A-E3/5AT is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC (SMA) surface mount
Mounting Type: Surface Mount
Technology: Standard rectifier diode

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Up to 1.3 V @ 1 A
Reverse Recovery Time (trr): Up to 150 ns
Current - Reverse Leakage @ Vr: Up to 5 µA @ rated voltage
Capacitance @ Vr, F: Variation acceptable within application requirements
Operating Temperature Range: -55°C to 150°C minimum

Upgrade Capability Parameters:

Higher voltage ratings (60 V, 100 V) are acceptable as upgrades
Lower forward voltage drop is acceptable
Faster recovery time is acceptable
Lower reverse leakage is acceptable
Extended temperature range is acceptable

Substitute parts must maintain identical or superior electrical performance within the specified package and mounting configuration.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Technology	Temp Range [°C]	Status
RS1A-E3/5AT	Vishay	50	1	1.3	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AC	Standard	-55 to 150	Active
RS1A-E3/61T	Vishay	50	1	1.3	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AC	Standard	-55 to 150	Active
STPS160A	STMicroelectronics	60	1	0.67	Fast Recovery ≤ 500ns	—	4 @ 60V	DO-214AC	Schottky	-55 to 150	Active
RGF1A	Fairchild Semiconductor	50	1	1.3	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AC	Standard	-65 to 175	Active
RGF1B	Fairchild Semiconductor	100	1	1.3	Fast Recovery ≤ 500ns	150	5 @ 100V	DO-214AC	Standard	-65 to 175	Active
RS1A-13-F	Diodes Incorporated	50	1	1.3	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AC	Standard	-65 to 150	Active
CGRA4001-G	Comchip Technology	50	1	1.1	Standard Recovery >500ns	—	5 @ 50V	DO-214AC	Standard	-55 to 150	Active
EGF1A	Fairchild Semiconductor	50	1	1.0	Fast Recovery ≤ 500ns	50	10 @ 50V	DO-214AC	Standard	-65 to 175	Active
ES1A-LTP	Micro Commercial Co	50	1	0.95	Fast Recovery ≤ 500ns	35	5 @ 50V	DO-214AC	Standard	-65 to 175	Not For New Designs
GF1A	onsemi	50	1	1.0	Standard Recovery >500ns	2000	5 @ 50V	DO-214AC	Standard	-65 to 175	Not For New Designs
GS1A-LTP	Micro Commercial Co	50	1	1.0	Standard Recovery >500ns	—	10 @ 50V	DO-214AC	Standard	-55 to 150	Not For New Designs

Engineering Selection Recommendations

Primary Equivalent (Direct Substitution):

RS1A-E3/61T from Vishay General Semiconductor - Diodes Division is the direct parametric equivalent. This part maintains identical electrical specifications and packaging to the RS1A-E3/5AT, with the only difference being the tape format (61T versus 5AT). Both parts are Active status and fully RoHS3 compliant with MSL 1 rating.

Active Status Alternatives (Recommended for New Designs):

RGF1A (Fairchild Semiconductor) and RS1A-13-F (Diodes Incorporated) are suitable alternatives with identical core electrical parameters. Both maintain 50 V / 1 A ratings in DO-214AC packaging. RGF1A offers extended temperature range (-65°C to 175°C) and is Active status. RS1A-13-F is also Active status with RoHS3 compliance and MSL 1 rating.

RGF1B (Fairchild Semiconductor) is an upgrade option providing 100 V reverse voltage rating while maintaining 1 A current capacity and identical forward voltage characteristics. This part is suitable when higher voltage margin is required.

Schottky Technology Alternative:

STPS160A (STMicroelectronics) is a Schottky diode offering 60 V / 1 A rating with significantly lower forward voltage (0.67 V versus 1.3 V). This part is Active status and suitable for applications where reduced forward voltage drop and power dissipation are beneficial. Schottky technology differs from standard rectifier technology and must be evaluated for application compatibility.

Obsolescence Consideration:

ES1A-LTP, GF1A, and GS1A-LTP are marked as "Not For New Designs" and should not be selected for new circuit development. These parts remain available but are in end-of-life status.

Compliance Status:

All Active status parts (RS1A-E3/61T, RGF1A, RGF1B, RS1A-13-F, CGRA4001-G, EGF1A) maintain RoHS3 compliance and REACH unaffected status. MSL 1 rating indicates unlimited shelf life under controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can RS1A-E3/61T be used as a direct replacement for RS1A-E3/5AT?

A: Yes. RS1A-E3/61T is a parametric equivalent with identical electrical specifications (50 V, 1 A, 1.3 V forward voltage, 150 ns recovery time). The difference is packaging format: 5AT denotes Cut Tape format while 61T denotes Tape & Reel format. Both are manufactured by Vishay and are Active status.

Q: What is the difference between the RS1A-E3/5AT and STPS160A?

A: STPS160A is a Schottky diode technology versus the standard rectifier technology of RS1A-E3/5AT. Key differences: STPS160A has 60 V rating (versus 50 V), significantly lower forward voltage of 0.67 V (versus 1.3 V), and different reverse recovery characteristics. Schottky diodes exhibit higher reverse leakage current. Selection depends on application requirements for forward voltage drop and switching speed.

Q: Are all substitute parts available in the same DO-214AC package?

A: Yes. All listed substitute parts use DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with the original RS1A-E3/5AT footprint.

Q: What does "Not For New Designs" status mean?

A: Parts marked "Not For New Designs" (ES1A-LTP, GF1A, GS1A-LTP) are in end-of-life phase. While currently available in inventory, these parts should not be selected for new circuit development. Use Active status alternatives instead.

Q: Can RGF1B (100 V rating) replace RS1A-E3/5AT (50 V rating)?

A: Yes, as an upgrade. RGF1B maintains identical 1 A current rating and forward voltage characteristics while providing higher voltage margin (100 V versus 50 V). This is suitable when circuit design permits higher voltage rating. No electrical performance degradation occurs; only improved voltage headroom is gained.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life under controlled storage conditions. No baking or moisture precautions are required before soldering, simplifying inventory management and assembly processes.

Q: How do recovery time specifications affect substitution?

A: Recovery time (trr) determines switching speed. RS1A-E3/5AT specifies 150 ns fast recovery. Substitutes with equal or faster recovery (lower trr values) are acceptable. Parts with slower recovery (higher trr or standard recovery >500ns) may introduce switching delays in high-frequency applications but are electrically compatible for standard rectification.

Q: Is CGRA4001-G suitable for high-speed switching applications?

A: CGRA4001-G has standard recovery characteristics (>500ns) versus the fast recovery (≤500ns) of RS1A-E3/5AT. For applications requiring fast switching response, fast recovery alternatives (RGF1A, RS1A-13-F, EGF1A) are preferred. CGRA4001-G is suitable for standard rectification where switching speed is not critical.

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