ES1A-TP Equivalent & Substitute Parts

Part Overview

The ES1A-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-214AC (HSMA) surface mount package. This component is classified as Obsolete, which necessitates identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and product status constraints.

Key Parameters

Parameter	ES1A-TP Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	975 mV @ 1 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-50 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ES1A-TP is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Substitute parts may vary within the range of 920 mV to 1.3 V @ 1 A
Speed Classification: Both Fast Recovery (≤ 500ns) and Standard Recovery (> 500ns) are acceptable
Reverse Recovery Time (trr): Range from 25 ns to 2 µs
Operating Temperature - Junction: Substitute parts with extended or equivalent ranges (-65°C to 175°C or -55°C to 150°C) are acceptable
Package / Case: DO-214AC (SMA) and DO-214BA (GF1) are mechanically compatible for surface mount applications

Package Compatibility: The ES1A-TP uses DO-214AC (HSMA) packaging. Substitutes in DO-214AC (SMA) and DO-214BA (GF1) packages are functionally equivalent for surface mount assembly, though mechanical footprint verification is required for DO-214BA variants.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Speed	trr [ns]	Package	Tj Range [°C]	Product Status
ES1A-TP	Micro Commercial Co	50	1	975	Fast Recovery ≤ 500ns	50	DO-214AC (HSMA)	-50 to 150	Obsolete
ES1A-LTP	Micro Commercial Co	50	1	950	Fast Recovery ≤ 500ns	35	DO-214AC (SMA)	-65 to 175	Not For New Designs
CGRA4001-G	Comchip Technology	50	1	1100	Standard Recovery > 500ns	—	DO-214AC (SMA)	-55 to 150	Active
EGF1A	Fairchild Semiconductor	50	1	1000	Fast Recovery ≤ 500ns	50	DO-214AC (SMA)	-65 to 175	Active
EGF1A-E3/5CA	Vishay General Semiconductor - Diodes Division	50	1	1000	Fast Recovery ≤ 500ns	50	DO-214BA (GF1)	-65 to 175	Active
EGF1A-E3/67A	Vishay General Semiconductor - Diodes Division	50	1	1000	Fast Recovery ≤ 500ns	50	DO-214BA (GF1)	-65 to 175	Active
ES1A	YAGEO	50	1	950	—	—	DO-214AC	—	Active
ES1A-13-F	Diodes Incorporated	50	1	920	Fast Recovery ≤ 500ns	25	DO-214AC (SMA)	-55 to 150	Active
GF1A	onsemi	50	1	1000	Standard Recovery > 500ns	2000	DO-214AC (SMA)	-65 to 175	Not For New Designs
GF1A-E3/67A	Vishay General Semiconductor - Diodes Division	50	1	1100	Standard Recovery > 500ns	2000	DO-214BA (GF1)	-65 to 175	Active
RS1A-M3/61T	Vishay General Semiconductor - Diodes Division	50	1	1300	Fast Recovery ≤ 500ns	150	DO-214AC (SMA)	-55 to 150	Active

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

For applications requiring direct replacement of the obsolete ES1A-TP with active product status and identical electrical performance, the following parts are recommended:

ES1A-13-F (Diodes Incorporated): Maintains 50 V / 1 A ratings with fast recovery characteristics and DO-214AC (SMA) packaging. Operating temperature range -55°C to 150°C matches the original specification. Forward voltage of 920 mV @ 1 A is within acceptable variation.
EGF1A (Fairchild Semiconductor): Provides 50 V / 1 A ratings with fast recovery (50 ns trr) and extended operating temperature range (-65°C to 175°C). Forward voltage of 1000 mV @ 1 A is equivalent to the original. Available in bulk packaging.
EGF1A-E3/5CA and EGF1A-E3/67A (Vishay General Semiconductor - Diodes Division): Both deliver 50 V / 1 A with fast recovery characteristics and extended temperature range. Package variant is DO-214BA (GF1) instead of DO-214AC; mechanical footprint compatibility must be verified for the specific application.

Secondary Substitutes (Extended Temperature Range):

ES1A-LTP (Micro Commercial Co): Direct manufacturer variant with identical electrical specifications but extended operating temperature (-65°C to 175°C) and improved reverse recovery time (35 ns). Product status is Not For New Designs; use only when extended temperature performance is required and no active alternative is suitable.

Conditional Substitutes (Performance Trade-offs):

CGRA4001-G (Comchip Technology): Meets 50 V / 1 A requirements with active product status. Forward voltage is 1100 mV @ 1 A (higher than original). Speed classification is Standard Recovery (> 500ns) rather than Fast Recovery. Suitable for applications where switching speed is not performance-critical.
GF1A (onsemi): Provides 50 V / 1 A with extended temperature range but classified as Not For New Designs. Reverse recovery time is 2 µs (significantly longer than original 50 ns). Use only when extended temperature performance is required and no active alternative is available.
RS1A-M3/61T (Vishay General Semiconductor - Diodes Division): Meets 50 V / 1 A requirements with active status. Forward voltage is 1300 mV @ 1 A (elevated compared to original). Reverse recovery time is 150 ns (longer than original). Suitable for applications with relaxed switching speed requirements.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes.

Frequently Asked Questions (FAQ)

Q: Can ES1A-13-F directly replace ES1A-TP without circuit modification?

A: ES1A-13-F is electrically equivalent across all critical parameters (50 V, 1 A, fast recovery). Both use DO-214AC (SMA) surface mount packaging. No circuit modification is required. Forward voltage difference (920 mV vs. 975 mV) is within normal component tolerance and does not affect circuit operation.

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

A: Both are surface mount packages for 1 A rectifier diodes. DO-214AC (SMA) and DO-214BA (GF1) have different mechanical footprints. Substitution between these packages requires verification that the PCB layout accommodates the alternative package dimensions. Electrical performance is equivalent.

Q: Why is ES1A-LTP listed as "Not For New Designs" when it is electrically superior?

A: Product status reflects manufacturer recommendations for new circuit designs. ES1A-LTP remains functionally equivalent and suitable for replacement in existing applications. The designation indicates that Micro Commercial Co recommends using alternative active products for new designs, not that the part is defective or unsuitable for substitution.

Q: What does "Fast Recovery ≤ 500ns" mean, and why does it matter?

A: Reverse recovery time (trr) is the interval required for a diode to transition from conducting to blocking state. Fast recovery (≤ 500ns) enables higher switching frequencies with reduced switching losses. Standard recovery (> 500ns) is acceptable for lower-frequency applications. Substituting a standard recovery diode into a fast recovery application may cause increased power dissipation and heat generation.

Q: Can CGRA4001-G replace ES1A-TP in a high-frequency switching circuit?

A: CGRA4001-G meets voltage and current requirements but uses Standard Recovery (> 500ns) classification versus the original Fast Recovery (≤ 500ns). In high-frequency switching applications, this substitution may result in increased reverse recovery losses. Suitability depends on the specific circuit switching frequency and thermal design margins.

Q: Are there inventory or lead-time considerations for these substitutes?

A: Inventory levels vary significantly among substitutes. EGF1A (Fairchild Semiconductor) has 39,900 pcs in stock, while RS1A-M3/61T (Vishay) has only 865 pcs. For production planning, verify current inventory status with the component supplier before committing to a specific substitute part number.

Q: What is the impact of forward voltage variation (920 mV to 1300 mV) on circuit performance?

A: Forward voltage variation affects voltage drop across the diode during conduction. In rectifier applications, this influences output voltage regulation and power dissipation. For precision analog circuits, higher forward voltage (RS1A-M3/61T at 1300 mV) may require circuit re-evaluation. For standard power supply applications, variation within this range is typically acceptable.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance. This ensures compatibility with modern manufacturing processes and regulatory requirements. Moisture sensitivity level (MSL 1 - Unlimited) is also consistent across all substitutes, allowing use of standard storage and handling procedures.

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