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Taiwan Semiconductor Corporation ES1AHR3G
- Part No.:
- ES1AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
ES1AHR3G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,776
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Product details
Overview
ES1AHR3G 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 max forward voltage at 1 A, and 5 µA max reverse leakage at 25°C - used for freewheeling and snubber circuits in DC-DC converters.
For engineers reviewing the ES1AHR3G datasheet, ES1AHR3G pinout, ES1AHR3G application, or ES1AHR3G equivalent, key selection criteria include peak repetitive reverse voltage rating, thermal resistance (RθJL = 35°C/W), junction temperature range (–55°C to +150°C), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
This discrete silicon diode uses a glass-passivated PN junction optimized for high-frequency switching operation. Its super fast recovery (trr ≤ 35 ns) minimizes switching losses in hard-switched topologies, while the single-die DO-214AC configuration supports automated placement and reflow soldering per J-STD-002.
The device operates across –55°C to +150°C junction temperature, with RθJA = 85°C/W and RθJL = 35°C/W enabling thermal management in compact power stages. Moisture sensitivity level is J-STD-020 Level 1, and the cathode band provides unambiguous polarity identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward current (IF) | 1 A continuous - supports medium-power DC-DC output rectification without forced cooling |
| Peak reverse voltage (VRRM) | 50 V - suitable for low-voltage buck, flyback, and synchronous rectifier auxiliary rails |
| Reverse recovery time (trr) | 35 ns max - enables efficient operation up to ~500 kHz switching frequencies |
| Forward voltage (VF) | 0.95 V max at 1 A, 25°C - limits conduction loss to ≤0.95 W per diode in linear operation |
| Junction-to-lead thermal resistance | 35°C/W - allows direct PCB copper pour heat sinking to maintain TJ < 150°C at full IF |
| Reverse leakage (IR) | 5 µA max at 25°C, rated VR - ensures minimal standby power loss in high-impedance bias networks |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band. Matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in boost/flyback secondary) |
| Cathode | Current exit point during forward conduction; marked with band | Connected to higher-potential rail (e.g., output capacitor positive terminal) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling stress in industrial environments |
| Super fast recovery (≤35 ns) | Reduces reverse recovery charge (Qrr) and associated EMI in high-frequency SMPS |
| J-STD-020 Level 1 moisture sensitivity | Enables standard SMT reflow without baking or special handling prior to assembly |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for commercial/industrial end equipment |
Applications
| DC-DC Converter Output Rectification | Snubber Network Clamping |
|---|---|
Use Scenario: Used as secondary-side rectifier in isolated 5–24 V output buck-derived converters. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC. Use Value: Low VF (≤0.95 V) and fast trr minimize conduction and switching losses at 300–500 kHz. | Use Scenario: Placed across MOSFET drain-source in flyback or LLC primary-side snubbers. IC Role / Device Role / Timing Role: Clamp inductive voltage spikes during switch turn-off using fast reverse recovery. Use Value: 35 ns trr ensures rapid transition into conduction before spike amplitude exceeds VRRM. |
| Freewheeling Diode in Buck Regulators | Lighting Driver Flyback Secondary |
Use Scenario: Provides current path for inductor discharge during high-side switch off-time in non-synchronous buck stages. IC Role / Device Role / Timing Role: Freewheeling path enabling continuous inductor current and stable regulation. Use Value: 1 A IF rating and 30 A IFSM support transient load steps without thermal runaway. | Use Scenario: Rectifies isolated flyback output in LED driver modules (e.g., 12 V/350 mA constant-current supplies). IC Role / Device Role / Timing Role: High-efficiency AC-to-DC conversion stage delivering stable DC to LED string. Use Value: Halogen-free, RoHS-compliant construction meets lighting safety and regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-ES1A-M3/5BT | Same DO-214AC package, identical 1 A / 50 V / 35 ns specs; VF = 0.93 V typ vs. 0.95 V max | No functional difference; qualified for automotive AEC-Q101 but not required for industrial use | Select if AEC-Q101 qualification or tighter VF distribution is needed |
| ON Semiconductor MUR105HE3/73 | Higher VRRM (50 V same), but VF = 1.05 V max and trr = 50 ns - slower, less efficient at high frequency | Acceptable in lower-frequency (<200 kHz) or cost-sensitive designs where efficiency margin is relaxed | Choose only when thermal budget allows higher conduction/switching loss |
Compared with VS-ES1A-M3/5BT and MUR105HE3/73, ES1AHR3G delivers optimal balance of low VF, fast trr, and industrial-grade reliability in DO-214AC - making it preferred for space-constrained, high-efficiency 300–500 kHz DC-DC and snubber applications.
Availability
ES1AHR3G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, snubber clamping, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for ES1AHR3G 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 industrial, computing, and consumer markets since 1979.
The ES1AHR3G belongs to TSC's ES1x super fast rectifier family, designed specifically for high-frequency switching power supplies where low forward voltage, fast recovery, and robust thermal performance are critical.
FAQ
What is the maximum junction temperature rating for ES1AHR3G?
The ES1AHR3G has a maximum junction temperature (TJ) rating of +150°C and a minimum of –55°C. This wide operating range allows reliable deployment in industrial ambient conditions up to +85°C with appropriate PCB copper area for heat dissipation. The device's RθJL of 35°C/W supports thermal design using direct lead-to-copper thermal paths.
Does ES1AHR3G have a specified reverse recovery time, and how is it measured?
Yes, ES1AHR3G has a maximum reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is critical for minimizing switching losses and EMI in high-frequency DC-DC converters. The test circuit and waveform are documented in Figure 6 of the official ES1A–ES1J datasheet (Version O2112).
Is ES1AHR3G compliant with RoHS and halogen-free standards?
Yes, ES1AHR3G is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and the matte tin-plated leads meet J-STD-002 solderability requirements. These certifications are confirmed in the "Features" and "Mechanical Data" sections of the Taiwan Semiconductor ES1A–ES1J datasheet.
What is the marking code on the ES1AHR3G device body?
The ES1AHR3G is marked with "ES1A" on the device body, followed by a green compound indicator (G), date code (YW), and factory code (F), as shown in the Marking Diagram on page 5 of the ES1A–ES1J datasheet. This marking confirms its 50 V VRRM rating within the ES1x family.
Can ES1AHR3G be used in place of a standard FR107 rectifier?
No - ES1AHR3G is not a direct replacement for FR107. While both are DO-214AC rectifiers, FR107 has VRRM = 1000 V and trr ≈ 500 ns, whereas ES1AHR3G is rated for only 50 V and recovers in ≤35 ns. Substituting ES1AHR3G in a 1000 V application would cause immediate avalanche failure. Use only where 50 V VRRM and ultrafast recovery are required.
ES1AHR3G 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
ES1AHR3G FAQ
1.How can I place an order for ES1AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for ES1AHR3G 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 ES1AHR3G reliable?
The price and inventory of ES1AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1AHR3G is usually 5 days.
3.What payment methods are accepted for ES1AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ES1AHR3G?
ES1AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ES1AHR3G 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 ES1AHR3G?
For technical support, including ES1AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1AHR3G requirements.
6.How does Aetrix verify that ES1AHR3G is sourced from the original manufacturer or authorized distributors?
All ES1AHR3G 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 ES1AHR3G meets industry standards.
7.What is the process for return or replacement of ES1AHR3G?
All ES1AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with ES1AHR3G, 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 ES1AHR3G part is unused and in its original packaging.
Return procedure for ES1AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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