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Taiwan Semiconductor Corporation ESH2CAH
- Part No.:
- ESH2CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
ESH2CAH.pdf
- Description:
- 25NS, 1A, 150V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
ESH2CAH from Taiwan Semiconductor is a 1 A, 150 V ultra-fast recovery surface-mount rectifier diode in DO-214AC (SMA) package, featuring 25 ns reverse recovery time, 0.9 V max forward voltage at 1 A, and 50 A peak surge current - used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the ESH2CAH datasheet, ESH2CAH pinout, ESH2CAH application, or ESH2CAH equivalent, key selection criteria include repetitive peak reverse voltage (150 V), junction temperature range (–55°C to +175°C), AEC-Q101 qualification, and ultra-fast switching performance for high-efficiency power conversion.
Technical Context
The ESH2CAH is a single-die, silicon planar junction ultra-fast rectifier optimized for high-frequency switching applications. Its 25 ns trr and low 0.9 V VF at 1 A enable reduced conduction and switching losses in compact power supplies.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports operation up to 175°C junction temperature with J-STD-020 Level 1 moisture sensitivity - enabling reflow-compatible automated assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or freewheeling configurations |
| IF | 1 A continuous - average forward current rating at TA = 75°C; determines thermal derating in enclosed designs |
| trr | 25 ns - ultra-fast reverse recovery time; minimizes switching loss and EMI in >100 kHz DC-DC topologies |
| VF (max) | 0.9 V at IF = 1 A, TJ = 25°C - low conduction loss improves efficiency in low-voltage output stages |
| IFSM | 50 A - non-repetitive surge current capability; withstands inrush and fault transients in automotive lighting drivers |
| TJ max | +175°C - extended junction temperature rating enables under-hood deployment without derating penalties |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.070 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); polarity must match PCB silkscreen |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail (e.g., output capacitor positive); critical for snubber placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - enables use in ASIL-B systems without additional qualification |
| Ultra-fast trr = 25 ns | Reduces turn-off energy loss and ringing in high-frequency (>200 kHz) switching regulators and LED drivers |
| Junction-to-lead RθJL = 20°C/W | Enables direct heat transfer to PCB copper; supports 1 A operation on 1 oz. Cu with minimal thermal pad area |
| Moisture sensitivity level 1 | Eliminates pre-bake requirement before reflow soldering - reduces manufacturing cycle time and cost |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 5–24 V for ADAS camera modules and infotainment ECUs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology. Use Value: 25 ns trr and 150 V VRRM ensure stable regulation during load transients and cold-crank conditions. | Use Scenario: Constant-current LED driver for adaptive front lighting systems with PWM dimming. IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to suppress voltage spikes during turn-off. Use Value: Low VF and fast recovery minimize power dissipation and improve thermal margin in sealed headlamp housings. |
| Industrial Power Supplies | Snubber Circuits in Motor Drives |
Use Scenario: Auxiliary bias supply in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback converter delivering 12 V/0.5 A. Use Value: 175°C TJ max allows reliable operation in high-ambient industrial enclosures without forced air cooling. | Use Scenario: RC snubber network across IGBTs in HVAC inverter drives. IC Role / Device Role / Timing Role: Clamp diode that conducts transient energy during switching transitions. Use Value: 50 A IFSM and 20 mJ ERSM handle repetitive inductive kickback without degradation over 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U | Same 1 A / 600 V rating but slower trr (≈50 ns); higher VF (1.15 V typ) | Better suited for general-purpose 600 V PFC stages, not optimal for 150 V high-frequency DC-DC | Select ESH2CAH when trr < 30 ns and VF < 0.95 V are required at 150 V blocking |
| MBR1150 | Schottky construction; zero recovery time but limited to 150 V max; higher IR leakage above 100°C | Ideal for low-noise, low-VF applications below 125°C ambient; unsuitable for under-hood automotive | Choose ESH2CAH over MBR1150 where TJ > 125°C or reverse leakage < 10 µA at 100°C is mandatory |
Compared with STTH1R06U and MBR1150, the ESH2CAH uniquely balances 150 V rating, 25 ns trr, AEC-Q101 qualification, and 175°C operation - making it the only option meeting all four criteria for next-gen automotive DC-DC converters.
Availability
ESH2CAH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converters, and snubber circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ESH2CAH 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 automotive, industrial, and consumer markets since 1979.
The ESH2CAH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-reliability, high-frequency power conversion in automotive and industrial environments.
FAQ
What is the marking code printed on the ESH2CAH device?
The ESH2CAH is marked "ESH2CA" on the device body, consistent with Taiwan Semiconductor's standard coding scheme where "CA" denotes the 150 V variant. This marking appears adjacent to the cathode band and is laser-etched for readability after reflow soldering. The full part number ESH2CAH is used for ordering and traceability, while ESH2CA serves as the visible identification on the DO-214AC (SMA) package.
Is the ESH2CAH suitable for use in automotive under-hood applications?
Yes, the ESH2CAH is explicitly qualified to AEC-Q101 and rated for junction temperatures up to +175°C, making it suitable for under-hood automotive applications such as engine control units and headlamp drivers. Its J-STD-020 Level 1 moisture sensitivity and matte tin-plated leads further support robust reflow assembly in automotive production lines without pre-baking.
What is the thermal resistance from junction to ambient (RθJA) for the ESH2CAH?
The ESH2CAH has a junction-to-ambient thermal resistance (RθJA) of 75°C/W when mounted on a standard FR-4 PCB with minimum copper area. This value assumes natural convection and no thermal vias or heatsinking. For sustained 1 A operation, thermal design should verify board layout meets this condition - or leverage its lower RθJL (20°C/W) by connecting the cathode pad directly to internal ground planes.
How does the reverse recovery time (trr) of the ESH2CAH compare to standard fast recovery diodes?
The ESH2CAH achieves a trr of 25 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions - significantly faster than standard fast recovery diodes (typically 50–100 ns). This ultra-fast recovery reduces switching losses and EMI generation in high-frequency DC-DC converters, distinguishing the ESH2CAH from general-purpose alternatives like the 1N4937 or UF4007.
Can the ESH2CAH replace the ESH2BAH or ESH2DAH in an existing design?
No - the ESH2CAH is not a drop-in replacement for ESH2BAH (100 V) or ESH2DAH (200 V), as each variant has distinct VRRM and VR(RMS) ratings. Substituting ESH2CAH for ESH2DAH risks insufficient reverse blocking in 200 V applications, while using it in place of ESH2BAH may over-specify voltage margin unnecessarily. Always validate voltage stress margins and derating curves before interchanging within the ESH2xAH family.
ESH2CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 150 V
- Capacitance @ Vr, F:
- 25pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
ESH2CAH FAQ
1.How can I place an order for ESH2CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for ESH2CAH 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 ESH2CAH reliable?
The price and inventory of ESH2CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESH2CAH is usually 5 days.
3.What payment methods are accepted for ESH2CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESH2CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESH2CAH?
ESH2CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESH2CAH 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 ESH2CAH?
For technical support, including ESH2CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESH2CAH requirements.
6.How does Aetrix verify that ESH2CAH is sourced from the original manufacturer or authorized distributors?
All ESH2CAH 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 ESH2CAH meets industry standards.
7.What is the process for return or replacement of ESH2CAH?
All ESH2CAH units undergo pre-shipment inspection (PSI). If there is an issue with ESH2CAH, 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 ESH2CAH part is unused and in its original packaging.
Return procedure for ESH2CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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