ES1A-13 Equivalent & Substitute Parts

Part Overview

The ES1A-13 is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This component is classified as discontinued at DiGi Electronics, which necessitates identification of equivalent and substitute parts for ongoing production and maintenance applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter tolerances for the 50 V / 1 A rectifier diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	25	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Capacitance @ Vr, F	10	pF @ 4V, 1MHz
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C

Substitute Part Grouping Explanation

Substitution of the ES1A-13 is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Range 920 mV to 1.3 V @ 1 A
Speed: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
Reverse Recovery Time (trr): 25 ns to 150 ns
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 50 V
Capacitance @ Vr, F: 8.5 pF to 15 pF @ 4V, 1MHz
Operating Temperature - Junction: -65°C to 175°C (wider range acceptable)

Parts are grouped as parametric equivalents when all mandatory parameters match exactly. Parts are classified as manufacturer-recommended substitutes when mandatory parameters match but acceptable variation parameters differ within specified ranges.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Speed	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Tj [°C]	Package	Status
ES1A-13	Diodes Incorporated	50	1	920	Fast Recovery ≤ 500ns	25	5 @ 50V	10 @ 4V, 1MHz	-55 to 150	DO-214AC, SMA	Discontinued
ES1A-13-F	Diodes Incorporated	50	1	920	Fast Recovery ≤ 500ns	25	5 @ 50V	10 @ 4V, 1MHz	-55 to 150	DO-214AC, SMA	Active
CGRA4001-G	Comchip Technology	50	1	1100	Standard Recovery > 500ns	—	5 @ 50V	—	-55 to 150	DO-214AC, SMA	Active
EGF1A	Fairchild Semiconductor	50	1	1000	Fast Recovery ≤ 500ns	50	10 @ 50V	15 @ 4V, 1MHz	-65 to 175	DO-214AC, SMA	Active
ES1A-LTP	Micro Commercial Co	50	1	950	Fast Recovery ≤ 500ns	35	5 @ 50V	—	-65 to 175	DO-214AC, SMA	Not For New Designs
GF1A	onsemi	50	1	1000	Standard Recovery > 500ns	2000	5 @ 50V	15 @ 4V, 1MHz	-65 to 175	DO-214AC, SMA	Not For New Designs
GS1A-LTP	Micro Commercial Co	50	1	1000	Standard Recovery > 500ns	—	10 @ 50V	15 @ 4V, 1MHz	-55 to 150	DO-214AC, SMA	Not For New Designs
RGF1A	Fairchild Semiconductor	50	1	1300	Fast Recovery ≤ 500ns	150	5 @ 50V	8.5 @ 4V, 1MHz	-65 to 175	DO-214AC, SMA	Active
RS1A	Taiwan Semiconductor Corporation	50	1	1300	Fast Recovery ≤ 500ns	150	5 @ 50V	10 @ 4V, 1MHz	-55 to 150	DO-214AC, SMA	Active
RS1A-E3/61T	Vishay General Semiconductor - Diodes Division	50	1	1300	Fast Recovery ≤ 500ns	150	5 @ 50V	10 @ 4V, 1MHz	-55 to 150	DO-214AC, SMA	Active
S1A	YAGEO	50	1	—	—	—	—	—	—	DO-214AC, SMA	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

ES1A-13-F is the parametric equivalent to ES1A-13. Both parts are manufactured by Diodes Incorporated and share identical electrical specifications: 50 V reverse voltage, 1 A average rectified current, 920 mV forward voltage drop at 1 A, fast recovery ≤ 500 ns, 25 ns reverse recovery time, and 10 pF capacitance. The primary distinction is product status: ES1A-13-F is active and available in Tape & Reel packaging, while ES1A-13 is discontinued. ES1A-13-F is ROHS3 compliant, whereas ES1A-13 is RoHS non-compliant.

Manufacturer-Recommended Substitutes (Active Status):

For new designs and ongoing production requiring active product status, the following substitutes are recommended based on compliance and availability:

EGF1A (Fairchild Semiconductor): Maintains 50 V / 1 A ratings with fast recovery characteristics. Forward voltage is 1000 mV at 1 A (80 mV higher than ES1A-13). Reverse recovery time is 50 ns (25 ns longer). Operating temperature range extends to -65°C to 175°C. Active product status with 39,900 units in stock.

RS1A-E3/61T (Vishay General Semiconductor - Diodes Division): Maintains 50 V / 1 A ratings with fast recovery characteristics. Forward voltage is 1300 mV at 1 A (380 mV higher than ES1A-13). Reverse recovery time is 150 ns (125 ns longer). Operating temperature range is -55°C to 150°C. Active product status with 5,232 units in stock. Cut Tape & Digi-Reel packaging.

RS1A (Taiwan Semiconductor Corporation): Maintains 50 V / 1 A ratings with fast recovery characteristics. Forward voltage is 1300 mV at 1 A (380 mV higher than ES1A-13). Reverse recovery time is 150 ns (125 ns longer). Operating temperature range is -55°C to 150°C. Active product status with 22,800 units in stock. ROHS3 compliant.

RGF1A (Fairchild Semiconductor): Maintains 50 V / 1 A ratings with fast recovery characteristics. Forward voltage is 1300 mV at 1 A (380 mV higher than ES1A-13). Reverse recovery time is 150 ns (125 ns longer). Operating temperature range extends to -65°C to 175°C. Active product status with 8,440 units in stock.

CGRA4001-G (Comchip Technology): Maintains 50 V / 1 A ratings with standard recovery characteristics (> 500 ns). Forward voltage is 1100 mV at 1 A (180 mV higher than ES1A-13). Operating temperature range is -55°C to 150°C. Active product status with 10,226 units in stock. ROHS3 compliant.

Legacy Substitutes (Not For New Designs):

ES1A-LTP, GF1A, and GS1A-LTP are classified as "Not For New Designs" and should not be selected for new product development. These parts are retained in this reference for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can ES1A-13-F be used as a direct replacement for ES1A-13?

A: Yes. ES1A-13-F is a parametric equivalent with identical electrical specifications. Both parts are rated for 50 V reverse voltage, 1 A average rectified current, 920 mV forward voltage drop at 1 A, fast recovery ≤ 500 ns, and 25 ns reverse recovery time. The primary difference is product status: ES1A-13-F is active and available, while ES1A-13 is discontinued. ES1A-13-F is ROHS3 compliant.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Recovery speed refers to the reverse recovery time (trr), which is the time required for a diode to switch from forward conduction to reverse blocking. Fast recovery diodes have trr ≤ 500 ns, while standard recovery diodes have trr > 500 ns. ES1A-13 specifies fast recovery with 25 ns trr. Substitutes with standard recovery (such as CGRA4001-G at > 500 ns or GF1A at 2000 ns) have longer switching times and may not be suitable for high-frequency switching applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are available in DO-214AC (SMA) surface mount package, which is mechanically and electrically compatible with ES1A-13. Packaging format (Tape & Reel, Cut Tape, or Bulk) varies by manufacturer and supplier, but the physical package remains DO-214AC.

Q: What is the significance of forward voltage (Vf) differences among substitutes?

A: Forward voltage drop affects power dissipation and circuit performance. ES1A-13 specifies 920 mV at 1 A. Substitutes range from 950 mV (ES1A-LTP) to 1300 mV (RGF1A, RS1A, RS1A-E3/61T). Higher forward voltage results in greater power loss as heat. For applications sensitive to voltage drop or thermal performance, lower Vf options (EGF1A at 1000 mV, CGRA4001-G at 1100 mV) are preferable to higher Vf options.

Q: Which substitute is recommended for new designs?

A: For new designs, select from parts with Active product status: ES1A-13-F, EGF1A, RS1A, RS1A-E3/61T, RGF1A, CGRA4001-G, or S1A. ES1A-13-F is the preferred choice as the parametric equivalent. If ES1A-13-F is unavailable, EGF1A or RS1A provide good availability and active status. Avoid parts marked "Not For New Designs" (ES1A-LTP, GF1A, GS1A-LTP) for new product development.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 2011/65/EU, which restricts the use of specific hazardous materials in electrical and electronic equipment. ES1A-13 is RoHS non-compliant, while ES1A-13-F and most active substitutes are ROHS3 compliant. For applications subject to RoHS requirements, select ROHS3-compliant parts.

Q: Can I use a diode with a higher reverse voltage rating as a substitute?

A: The substitute parts listed all maintain the 50 V reverse voltage rating of ES1A-13. Using a diode with a higher voltage rating (e.g., 100 V or 200 V) is not necessary and introduces unnecessary cost and size. Substitution must maintain the 50 V specification.

Q: What is the operating temperature range significance?

A: ES1A-13 operates from -55°C to 150°C junction temperature. Some substitutes extend this range to -65°C to 175°C (EGF1A, RGF1A). Extended temperature range is beneficial for applications in extreme environments but is not required for standard industrial applications. Verify application requirements before selecting a substitute based on temperature range alone.

Q: Are there any compliance or certification differences I should consider?

A: All parts listed are REACH Unaffected and carry ECCN EAR99 classification. ROHS status varies: ES1A-13 is non-compliant, while ES1A-13-F and most active substitutes are ROHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for most parts, indicating no special moisture handling requirements. Verify compliance requirements for your specific application and regulatory jurisdiction.

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