RS1A-13 General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The RS1A-13 is a general purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This part is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and repair applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and compliance requirements.

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 Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 150	°C

Substitute Part Grouping Explanation

Substitution eligibility for the RS1A-13 is determined by the following critical parameters:

Mandatory Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Must be Surface Mount
Package / Case: Must be DO-214AC (SMA) or mechanically compatible alternative

Secondary Electrical Considerations:

Voltage - Forward (Vf) (Max) @ If: Substitute values up to 1.3 V @ 1 A are acceptable
Current - Reverse Leakage @ Vr: Substitute values up to 10 µA @ 50 V are acceptable
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns) are both acceptable
Reverse Recovery Time (trr): Substitute values up to 150 ns are acceptable

Thermal Compatibility:

Operating Temperature - Junction: Substitute minimum of -65°C and maximum of 150°C or higher

Compliance & Availability:

RoHS Status: ROHS3 Compliant preferred for new designs
Product Status: Active status preferred; Not For New Designs acceptable for legacy applications
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Bulk formats all acceptable

Substitute parts meeting these criteria are grouped by manufacturer and packaging configuration to facilitate procurement decisions based on inventory availability and supply chain requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Speed	trr [ns]	Ir @ 50V [µA]	Package	Tj (°C)	Product Status	RoHS
RS1A-13	Diodes Incorporated	50	1	1.3	Fast Recovery ≤ 500ns	150	5	DO-214AC (SMA)	-65 to 150	Discontinued	Non-compliant
RS1A-13-F	Diodes Incorporated	50	1	1.3	Fast Recovery ≤ 500ns	150	5	DO-214AC (SMA)	-65 to 150	Active	ROHS3 Compliant
RGF1A-E3/67A	Vishay General Semiconductor	50	1	1.3	Fast Recovery ≤ 500ns	150	5	DO-214BA (GF1)	-65 to 175	Active	ROHS3 Compliant
RGF1A	Fairchild Semiconductor	50	1	1.3	Fast Recovery ≤ 500ns	150	5	DO-214AC (SMA)	-65 to 175	Active	Not specified
CGRA4001-G	Comchip Technology	50	1	1.1	Standard Recovery > 500ns	Not specified	5	DO-214AC (SMA)	-55 to 150	Active	ROHS3 Compliant
EGF1A	Fairchild Semiconductor	50	1	1.0	Fast Recovery ≤ 500ns	50	10	DO-214AC (SMA)	-65 to 175	Active	Not specified
ES1A	YAGEO	Not specified	Not specified	0.95	Not specified	Not specified	Not specified	DO-214AC	Not specified	Active	ROHS3 Compliant
ES1A-E3/5AT	Vishay General Semiconductor	50	1	0.92	Fast Recovery ≤ 500ns	25	5	DO-214AC (SMA)	-55 to 155	Active	ROHS3 Compliant
ES1A-E3/61T	Vishay General Semiconductor	50	1	0.92	Fast Recovery ≤ 500ns	25	5	DO-214AC (SMA)	-55 to 150	Active	ROHS3 Compliant
ES1A-LTP	Micro Commercial Co	50	1	0.95	Fast Recovery ≤ 500ns	35	5	DO-214AC (SMA)	-65 to 175	Not For New Designs	ROHS3 Compliant
GF1A	onsemi	50	1	1.0	Standard Recovery > 500ns	2000	5	DO-214AC (SMA)	-65 to 175	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute (Direct Replacement):

RS1A-13-F (Diodes Incorporated) is the direct functional equivalent with identical electrical specifications and the same DO-214AC (SMA) package. This part is Active status with ROHS3 compliance, making it the preferred selection for new designs and production continuity. The primary distinction is packaging format (Tape & Reel vs. bulk), which does not affect electrical performance.

Secondary Substitutes (Electrical Equivalents with Package Compatibility):

ES1A-E3/5AT and ES1A-E3/61T (Vishay General Semiconductor) meet all mandatory electrical and mechanical requirements with improved forward voltage characteristics (0.92 V vs. 1.3 V @ 1 A) and faster reverse recovery time (25 ns vs. 150 ns). Both are Active status with ROHS3 compliance. Operating temperature range is -55°C to 155°C or -55°C to 150°C, which is acceptable for most applications requiring the original -65°C to 150°C range, with the exception of extreme low-temperature operation below -55°C.

RGF1A (Fairchild Semiconductor) provides identical electrical specifications with extended operating temperature range (-65°C to 175°C) in the DO-214AC (SMA) package. Active status supports new designs.

EGF1A (Fairchild Semiconductor) meets electrical requirements with improved forward voltage (1.0 V) and faster recovery time (50 ns). Extended temperature range (-65°C to 175°C) and Active status support production applications.

Alternative Substitutes (Acceptable with Operational Considerations):

CGRA4001-G (Comchip Technology) is Active status with ROHS3 compliance but operates at Standard Recovery speed (> 500ns) versus the original Fast Recovery specification. Operating temperature range is limited to -55°C to 150°C. This part is suitable for applications where recovery speed is not performance-critical.

GF1A (onsemi) is Not For New Designs status with significantly slower recovery time (2 µs). This part is acceptable only for legacy applications where supply continuity is required and performance degradation is acceptable.

ES1A-LTP (Micro Commercial Co) is Not For New Designs status and should be used only for repair of existing equipment where original part sourcing is not feasible.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant except RGF1A and EGF1A, for which RoHS status is not specified. Verification of RoHS compliance with manufacturers is required for applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can RS1A-13-F be used as a direct replacement for RS1A-13?

A: Yes. RS1A-13-F is manufactured by the same company (Diodes Incorporated) with identical electrical specifications, voltage rating, current rating, and package type (DO-214AC, SMA). The only difference is packaging format (Tape & Reel vs. bulk). RS1A-13-F is Active status with ROHS3 compliance, making it the preferred direct replacement.

Q: What is the difference between DO-214AC and DO-214BA packages?

A: DO-214AC (SMA) and DO-214BA (GF1) are both surface mount diode packages with different physical dimensions. RGF1A-E3/67A uses DO-214BA package, which has different footprint dimensions than the original DO-214AC. PCB layout modification is required if substituting with DO-214BA packages. Verify footprint compatibility before selection.

Q: Why do some substitute parts have lower forward voltage (Vf)?

A: Forward voltage variation is a normal characteristic of different diode manufacturing processes and materials. ES1A-E3/5AT and ES1A-E3/61T have Vf of 0.92 V compared to the original 1.3 V. Lower forward voltage reduces power dissipation and heat generation, which is beneficial in most applications. Verify that circuit design does not depend on specific forward voltage characteristics before substitution.

Q: Are there temperature range limitations with substitute parts?

A: Yes. The original RS1A-13 operates from -65°C to 150°C. ES1A-E3/5AT and ES1A-E3/61T are limited to -55°C to 155°C or -55°C to 150°C. If your application requires operation below -55°C, select RGF1A, EGF1A, ES1A-LTP, or GF1A, which all support -65°C minimum. Verify your application's actual temperature requirements before selection.

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

A: Parts marked "Not For New Designs" are still in production and available for purchase but are not recommended for new circuit designs. These parts are suitable for repair and maintenance of existing equipment. For new production designs, select parts with Active status such as RS1A-13-F, ES1A-E3/5AT, ES1A-E3/61T, RGF1A, EGF1A, or CGRA4001-G.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the interval required for a diode to stop conducting in the reverse direction after the applied voltage reverses. Faster recovery time (lower trr value) reduces switching losses and electromagnetic interference in high-frequency applications. The original RS1A-13 has trr of 150 ns. ES1A-E3/5AT and ES1A-E3/61T have trr of 25 ns, providing superior performance in switching applications. GF1A has trr of 2 µs, which is significantly slower and suitable only for low-frequency rectification.

Q: Is ROHS3 compliance required for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other jurisdictions. If your application is subject to RoHS regulations, select only parts explicitly marked as ROHS3 Compliant: RS1A-13-F, RGF1A-E3/67A, CGRA4001-G, ES1A, ES1A-E3/5AT, ES1A-E3/61T, ES1A-LTP, or GF1A. Verify regulatory requirements for your specific market before final part selection.

Q: Can I use CGRA4001-G as a substitute if recovery speed is not critical?

A: Yes. CGRA4001-G meets all mandatory electrical and mechanical requirements with Active status and ROHS3 compliance. The primary difference is Standard Recovery speed (> 500ns) versus the original Fast Recovery specification (≤ 500ns). If your circuit operates at low switching frequencies or does not require fast recovery characteristics, CGRA4001-G is a suitable and readily available alternative with high inventory levels (10,226 pcs).

Q: What inventory levels are available for each substitute?

A: Inventory availability varies significantly. ES1A-E3/61T has the highest inventory (75,150 pcs), followed by EGF1A (39,900 pcs) and GF1A (35,200 pcs). RS1A-13-F has 10,400 pcs, CGRA4001-G has 10,226 pcs, and ES1A-E3/5AT has 20,100 pcs. For time-sensitive applications, verify current inventory with your supplier before final procurement decisions.

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