My Inquiry
My Account
Taiwan Semiconductor Corporation ES1AL
- Part No.:
- ES1AL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
ES1AL.pdf
- Description:
- 35NS, 1A, 50V, SUPER FAST RECOVE
- Quantity:
- Payment:
- Shipping:
Inventory:6,831
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ES1AL from Taiwan Semiconductor is a 1 A, 50 V super fast surface-mount rectifier diode in Sub 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; it serves as a freewheeling or output rectifier in DC-DC converters.
For engineers reviewing the ES1AL datasheet, ES1AL pinout, ES1AL application, or ES1AL equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (RθJL = 35 °C/W), junction temperature range (–55 to +150 °C), and moisture sensitivity level (MSL 1).
Technical Context
This single-die, glass-passivated silicon rectifier uses planar epitaxial construction for stable super-fast switching performance. Its low-profile Sub SMA package supports automated placement and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
The device operates with a maximum junction temperature of 150°C, exhibits 5 µA reverse leakage at 25°C and rated VR, and delivers 10 pF junction capacitance at 1 MHz and 4.0 V reverse bias - enabling high-frequency operation in switching-mode power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 1 A continuous - supports medium-power DC-DC output stages without heatsinking |
| Repetitive Peak Reverse Voltage (VRRM) | 50 V - defines maximum blocking voltage in flyback or buck converter freewheel paths |
| Reverse Recovery Time (trr) | 35 ns - enables efficient operation above 100 kHz switching frequencies |
| Forward Voltage (VF) | 0.95 V @ 1 A, 25°C - limits conduction loss to ≤0.95 W per diode in linear-regulated paths |
| Junction-to-Lead Thermal Resistance (RθJL) | 35 °C/W - allows direct PCB copper pour heat transfer to improve power handling reliability |
| Moisture Sensitivity Level | MSL 1 - permits unlimited floor life and standard reflow without baking preconditioning |
Pinout & Package
Sub SMA package: surface-mount, single-anode/single-cathode configuration with cathode band marking; lead finish is matte tin, solderable per J-STD-002; weight ≈ 0.019 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck topology) |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output rail or inductor return path; polarity critical for rectification |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling stress |
| Low profile Sub SMA package | Enables compact layout in space-constrained DC-DC modules and PoL converters |
| 30 A IFSM rating | Withstands transient inrush currents during startup or fault conditions |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental manufacturing requirements |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Output stage of isolated flyback or non-isolated buck converter delivering 5–12 V at up to 1 A. IC Role / Device Role / Timing Role: Unidirectional current path enabling energy transfer from transformer/inductor to output capacitor. Use Value: 35 ns trr minimizes switching loss and EMI generation at 200–500 kHz operating frequencies. | Use Scenario: Freewheeling path across inductive loads in H-bridge motor inverters or solenoid drivers. IC Role / Device Role / Timing Role: Provides low-loss recirculation path when main switch turns off. Use Value: 0.95 V VF reduces conduction loss versus standard FRDs, improving thermal margin at 1 A load. |
| AC-DC Adapter Secondary Side | Industrial Sensor Power Supply |
Use Scenario: Secondary-side rectification in compact wall adapters powering USB-C PD accessories. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; placed adjacent to output filter capacitor. Use Value: MSL 1 rating eliminates pre-bake requirement, streamlining SMT assembly in high-volume production. | Use Scenario: Local 3.3 V or 5 V supply for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Isolates and rectifies auxiliary winding output in flyback-derived bias rails. Use Value: 150°C max junction temperature ensures stable operation in enclosed industrial enclosures up to 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor ES1B | VRRM = 100 V; VF = 0.95 V @ 1 A; same Sub SMA package and trr = 35 ns | Higher blocking voltage suits 12 V input systems where 50 V margin is insufficient | Select ES1B if system requires >50 V reverse standoff; otherwise ES1AL offers optimal cost/performance for 5 V–12 V outputs |
| Vishay ES1J | VRRM = 600 V; VF = 1.70 V @ 1 A; trr = 35 ns; same package | Designed for high-voltage PFC or offline SMPS primary-side snubbing, not low-VF output rectification | ES1J trades higher VF for extended voltage range; avoid in low-VF-sensitive 50 V-class designs unless voltage rating is primary constraint |
Compared with ES1B and ES1J, the ES1AL provides the lowest forward voltage and tightest voltage rating match for 5–12 V DC-DC output rectification, minimizing conduction loss while maintaining MSL 1 handling and Sub SMA footprint compatibility.
Availability
ES1AL is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and industrial sensor power supplies requiring stable component supply, consistent parametric performance, and full MSL 1 handling compliance.
Supply support for ES1AL 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, MOSFETs, and IGBTs, with global distribution and AEC-Q200 qualified lines.
The ES1AL belongs to TSC's ES1xL super-fast rectifier family, engineered specifically for high-efficiency, high-frequency switching power supplies where low trr and controlled VF are critical to system-level efficiency and thermal design.
FAQ
What is the maximum junction temperature rating for ES1AL?
The ES1AL has a maximum junction temperature (TJ) rating of +150°C, with an operational range from –55°C to +150°C. This rating allows reliable use in enclosed industrial environments and high-ambient applications. Derating curves in the ES1AL datasheet show average forward current must be reduced above 75°C ambient to maintain safe junction temperatures. The ES1AL's RθJL of 35 °C/W supports effective thermal coupling to PCB copper.
Does ES1AL have a specified moisture sensitivity level (MSL)?
Yes, the ES1AL is rated MSL 1 per J-STD-020, meaning it has unlimited floor life and can be subjected to standard reflow profiles without prior baking. This simplifies manufacturing logistics for high-volume SMT lines. The Sub SMA package construction and matte tin plating contribute to this robust moisture resistance. No dry-pack or humidity indicator is required for ES1AL storage or handling.
What is the reverse recovery time (trr) of ES1AL and how is it measured?
The ES1AL has a 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 value is confirmed in the official ES1AL datasheet and applies across the full operating temperature range. The 35 ns trr enables efficient operation in switching power supplies operating up to 500 kHz. It reflects the device's super-fast recovery characteristic, distinguishing it from standard or fast recovery rectifiers.
Is ES1AL RoHS and halogen-free compliant?
Yes, the ES1AL is fully RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor certifies that no brominated flame retardants (BFRs), chlorinated flame retardants (CFRs), or antimony trioxide are used in the molding compound. Lead content is below 1000 ppm, and all six RoHS substances meet EU Directive 2011/65/EU limits. Compliance documentation is available upon request for ES1AL.
What does the marking code "EAL" on ES1AL indicate?
"EAL" is the top-side marking code for the ES1AL, uniquely identifying it within the ES1xL family. Per the datasheet, "x" in ES1xL corresponds directly to voltage grade: "A" = 50 V (ES1AL), "B" = 100 V (ES1BL), etc. The marking appears adjacent to the cathode band on the Sub SMA package body and is laser-etched for permanent identification. This code enables quick visual verification during incoming inspection or field repair of ES1AL.
ES1AL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
ES1AL FAQ
1.How can I place an order for ES1AL through Aetrix?
Please submit a Request for Quotation (RFQ) for ES1AL 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 ES1AL reliable?
The price and inventory of ES1AL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1AL is usually 5 days.
3.What payment methods are accepted for ES1AL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1AL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ES1AL?
ES1AL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ES1AL 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 ES1AL?
For technical support, including ES1AL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1AL requirements.
6.How does Aetrix verify that ES1AL is sourced from the original manufacturer or authorized distributors?
All ES1AL 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 ES1AL meets industry standards.
7.What is the process for return or replacement of ES1AL?
All ES1AL units undergo pre-shipment inspection (PSI). If there is an issue with ES1AL, 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 ES1AL part is unused and in its original packaging.
Return procedure for ES1AL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ES1AL Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
