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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation ES1AHM2G

Name: ES1AHM2G
Brand: Taiwan Semiconductor Corporation
SKU: ES1AHM2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ES1AHM2G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: ES1AHM2G.pdf

Description:: DIODE GEN PURP 50V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,548

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Product details

Overview

ES1AHM2G from Taiwan Semiconductor is a 1 A, 50 V super fast recovery surface-mount rectifier in DO-214AC (SMA) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 1 A and 25°C, and 30 A peak surge current capability; used in DC-DC converters and snubber circuits for high-efficiency power conversion.

For engineers reviewing the ES1AHM2G datasheet, ES1AHM2G pinout, ES1AHM2G application, or ES1AHM2G equivalent, key selection criteria include V_RRM = 50 V, I_F = 1 A, t_rr = 35 ns, V_F = 0.95 V, and DO-214AC thermal performance (R_θJA = 85°C/W).

Technical Context

This single-die, glass-passivated super fast rectifier delivers low conduction loss and minimal switching loss due to its 35 ns reverse recovery time and low junction capacitance (16 pF at 1 MHz, 4 V). It operates across -55°C to +150°C junction temperature range with moisture sensitivity level 1 per J-STD-020.

The device uses a unidirectional single-anode/single-cathode configuration in DO-214AC (SMA) package, with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is marked by cathode band.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in 50 V-rated DC-DC output stages
I_F	1 A continuous - rated average forward current; defines steady-state power handling in freewheeling paths
t_rr	35 ns - ultra-fast recovery enables high-frequency switching (>100 kHz) with reduced switching loss and EMI
V_F	0.95 V @ 1 A, 25°C - low forward drop improves efficiency in low-voltage, high-current rectification
R_θJA	85°C/W - thermal resistance from junction to ambient; determines required PCB copper area for 1 A operation at T_J ≤ 150°C
I_FSM	30 A - non-repetitive surge rating supports inrush and transient overload in SMPS startup
C_J	16 pF @ 1 MHz, 4 V - low junction capacitance minimizes capacitive coupling noise in high-dV/dt snubber applications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-phase, unidirectional rectifier with cathode band marking. Weight: 0.060 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); polarity must match layout silkscreen
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to higher-potential node (e.g., output rail); cathode band orientation confirms correct placement during automated assembly

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability under humid conditions and prevents leakage increase over time
Moisture sensitivity level 1	Eliminates need for dry-packaging or baking prior to reflow, reducing manufacturing overhead
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained industrial and consumer products
UL 94V-0 molding compound	Provides flame-retardant encapsulation required for safety-certified power supplies and lighting systems
J-STD-002 solderable leads	Ensures consistent wetting and joint integrity during lead-free reflow (260°C peak) without post-process cleaning

Applications

DC–DC Converters	Snubber Circuits
Use Scenario: Output rectification in 5–12 V isolated flyback or forward converters powering IoT edge nodes. IC Role / Device Role / Timing Role: Primary unidirectional current path delivering regulated DC output; handles 1 A continuous load with minimal V_F loss. Use Value: 0.95 V forward drop at 1 A reduces conduction loss by ~15% vs. standard fast rectifiers, improving full-load efficiency.	Use Scenario: RCD snubber network across MOSFETs in 65–100 kHz SMPS inverters for LED drivers. IC Role / Device Role / Timing Role: Fast clamping diode absorbing turn-off energy; 35 ns t_rr ensures clean voltage ring suppression. Use Value: Low C_J (16 pF) and fast recovery minimize snubber losses and prevent false triggering of gate drivers.
Freewheeling Diodes	Lighting Applications
Use Scenario: Inductor freewheel path in automotive LED driver buck regulators operating at 250 kHz. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time; withstands 50 V reverse stress. Use Value: 30 A I_FSM rating accommodates inductor current overshoot during cold-start, preventing catastrophic failure.	Use Scenario: Secondary-side rectification in constant-current LED ballasts for commercial downlights. IC Role / Device Role / Timing Role: Converts high-frequency AC from transformer secondary into DC for LED string biasing. Use Value: UL 94V-0 package and halogen-free construction meet IEC 62368-1 safety and environmental requirements for indoor lighting.

DC–DC Converters

Snubber Circuits

Use Scenario: Output rectification in 5–12 V isolated flyback or forward converters powering IoT edge nodes.

IC Role / Device Role / Timing Role: Primary unidirectional current path delivering regulated DC output; handles 1 A continuous load with minimal V_F loss.

Use Value: 0.95 V forward drop at 1 A reduces conduction loss by ~15% vs. standard fast rectifiers, improving full-load efficiency.

Use Scenario: RCD snubber network across MOSFETs in 65–100 kHz SMPS inverters for LED drivers.

IC Role / Device Role / Timing Role: Fast clamping diode absorbing turn-off energy; 35 ns t_rr ensures clean voltage ring suppression.

Use Value: Low C_J (16 pF) and fast recovery minimize snubber losses and prevent false triggering of gate drivers.

Freewheeling Diodes

Lighting Applications

Use Scenario: Inductor freewheel path in automotive LED driver buck regulators operating at 250 kHz.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time; withstands 50 V reverse stress.

Use Value: 30 A I_FSM rating accommodates inductor current overshoot during cold-start, preventing catastrophic failure.

Use Scenario: Secondary-side rectification in constant-current LED ballasts for commercial downlights.

IC Role / Device Role / Timing Role: Converts high-frequency AC from transformer secondary into DC for LED string biasing.

Use Value: UL 94V-0 package and halogen-free construction meet IEC 62368-1 safety and environmental requirements for indoor lighting.

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR105	V_RRM = 50 V, t_rr = 50 ns, V_F = 1.05 V @ 1 A - slower recovery and higher forward drop	Acceptable in <100 kHz designs where EMI margin allows longer t_rr; less efficient at high frequency	Select when legacy qualification or dual-sourcing requires ON Semi footprint compatibility
Vishay VS-1EWH05	V_RRM = 50 V, t_rr = 30 ns, V_F = 0.92 V - slightly faster and lower V_F, but DO-214AA (SMB) package	Requires PCB pad revision due to larger SMB footprint; better thermal performance (R_θJA = 70°C/W)	Choose for higher efficiency or thermal headroom where board space permits SMB layout change

Compared with MUR105 and VS-1EWH05, ES1AHM2G offers optimal balance of speed (35 ns), forward loss (0.95 V), and DO-214AC footprint compatibility-making it ideal for space-constrained, high-frequency 50 V rectification without layout redesign.

Availability

ES1AHM2G is available at Aetrix Electronics and suitable for DC–DC converters, snubber networks, and lighting applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for ES1AHM2G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power management and industrial markets since 1979.

The ES1A–ES1J series was designed specifically for high-efficiency, high-frequency switching power supplies-including compact AC/DC adapters, LED drivers, and telecom DC–DC modules-where fast recovery, low V_F, and robust thermal reliability are critical.

FAQ

What is the maximum junction temperature rating for ES1AHM2G?

The ES1AHM2G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range supports use in thermally demanding environments such as enclosed LED drivers or automotive under-hood power modules. Derating curves in the ES1A–ES1J datasheet confirm 1 A continuous current is sustainable up to 110°C ambient with adequate PCB copper area.

Is ES1AHM2G compatible with lead-free reflow soldering processes?

Yes, ES1AHM2G features matte tin-plated leads qualified to J-STD-002 for solderability and is rated for peak reflow temperatures up to 260°C. Its DO-214AC (SMA) package meets JEDEC standards for lead-free assembly, and the device has moisture sensitivity level 1-no baking required prior to reflow.

Does ES1AHM2G have a specified reverse recovery charge (Q_rr) value?

No Q_rr value is published in the official ES1A–ES1J datasheet. Only reverse recovery time (t_rr = 35 ns, measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A) is specified. Designers requiring Q_rr should consult test reports from Taiwan Semiconductor or characterize the ES1AHM2G under actual circuit conditions using standardized double-pulse methods.

What does the 'HM2G' suffix in ES1AHM2G indicate?

The 'HM2G' suffix denotes tape-and-reel packaging: 'H' = halogen-free, 'M2' = DO-214AC (SMA) package, 'G' = green compound (RoHS-compliant molding material). This matches Taiwan Semiconductor's ordering code convention in the ES1A–ES1J datasheet, where 'ES1xHM2G' specifies 7,500 units per reel.

Can ES1AHM2G be used as a direct replacement for ES1A in existing designs?

Yes, ES1AHM2G is the halogen-free, green-compound variant of ES1A with identical electrical specifications (V_RRM = 50 V, t_rr = 35 ns, V_F = 0.95 V), thermal ratings, and DO-214AC mechanical dimensions. No layout or schematic changes are needed when upgrading from legacy ES1A to ES1AHM2G for RoHS compliance.

ES1AHM2G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 16pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 150°C

ES1AHM2G FAQ

1.How can I place an order for ES1AHM2G through Aetrix?

Please submit a Request for Quotation (RFQ) for ES1AHM2G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ES1AHM2G reliable?

The price and inventory of ES1AHM2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1AHM2G is usually 5 days.

3.What payment methods are accepted for ES1AHM2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1AHM2G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ES1AHM2G?

ES1AHM2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ES1AHM2G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ES1AHM2G?

For technical support, including ES1AHM2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1AHM2G requirements.

6.How does Aetrix verify that ES1AHM2G is sourced from the original manufacturer or authorized distributors?

All ES1AHM2G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ES1AHM2G meets industry standards.

7.What is the process for return or replacement of ES1AHM2G?

All ES1AHM2G units undergo pre-shipment inspection (PSI). If there is an issue with ES1AHM2G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ES1AHM2G part is unused and in its original packaging.

Return procedure for ES1AHM2G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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