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Taiwan Semiconductor Corporation RS2KALH
- Part No.:
- RS2KALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
RS2KALH.pdf
- Description:
- 500NS, 2A, 800V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
RS2KALH from Taiwan Semiconductor is a 2 A, 800 V fast recovery surface-mount rectifier in Thin SMA package, featuring 500 ns reverse recovery time, 1.06 V forward voltage at 2 A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or snubber diode in DC/DC converters where high efficiency and thermal robustness are required.
For engineers reviewing the RS2KALH datasheet, RS2KALH pinout, RS2KALH application, or RS2KALH equivalent, key selection criteria include its 800 V VRRM rating, 175 °C maximum junction temperature, glass-passivated junction, and J-STD-020 Level 1 moisture sensitivity - all critical for under-hood automotive power designs.
Technical Context
The RS2KALH is a single-die, unidirectional fast recovery rectifier optimized for switching power supplies. Its 500 ns trr and low 10 pF junction capacitance at 1 MHz/4 V enable efficient operation in high-frequency DC/DC topologies up to several hundred kHz.
Thermal performance is defined by RθJL = 16 °C/W and RθJA = 73 °C/W on a 5 mm × 5 mm Cu pad PCB, supporting continuous 2 A conduction with minimal derating up to 125 °C ambient when properly mounted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input stages in 48 V–400 V DC bus systems with 2× safety margin |
| IF | 2 A continuous - delivers full rated current without forced air or heatsink in typical PCB layouts |
| trr | 500 ns - enables use in 200–500 kHz switching converters with low switching loss |
| VF @ 2A/25°C | 1.06 V - contributes to <1.1 W conduction loss per device at full load |
| TJ max | 175 °C - allows operation in under-hood automotive environments (e.g., engine control modules) |
| CJ @ 1 MHz | 10 pF - minimizes capacitive coupling noise in high dv/dt gate-drive or snubber circuits |
Pinout & Package
Package: Thin SMA (JEDEC DO-221AC variation), low-profile surface-mount package with matte tin-plated leads, cathode indicated by band, weight ≈ 0.029 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter freewheel path) |
| Cathode | Current exit terminal during forward conduction | Marked by band; ties to higher-potential rail (e.g., output capacitor positive in boost topology) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Glass passivated junction | Enhances long-term reliability and humidity resistance in harsh environments without hermetic sealing |
| Low profile Thin SMA | 0.75 mm max height enables compact layout in space-constrained modules (e.g., ECU power stages) |
| J-STD-020 Level 1 moisture sensitivity | Zero bake requirement before reflow - simplifies SMT assembly and reduces process cost |
Applications
| Automotive Engine Control Unit (ECU) Power Stage | Industrial DC/DC Isolated Converter |
|---|---|
Use Scenario: Freewheeling path in synchronous buck regulator supplying microcontroller core voltage in engine control module. IC Role / Device Role / Timing Role: Fast-recovery rectifier handling 2 A peak inductive current during high-side FET off-time. Use Value: 500 ns trr and 1.06 V VF minimize switching loss and thermal rise in confined under-hood space. | Use Scenario: Output rectification in 24 V input, 5 V/3 A isolated flyback converter for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side unidirectional current path with low forward drop and minimal reverse recovery ringing. Use Value: 10 pF CJ and 800 V VRRM support clean regulation and withstand reflected transients across transformer isolation barrier. |
| Snubber Network in Motor Drive Inverter | Freewheeling Diode in Telecom DC Brick |
Use Scenario: RC snubber clamp across IGBT collector-emitter in 48 V BLDC inverter stage. IC Role / Device Role / Timing Role: Transient energy dissipation path during IGBT turn-off, requiring fast recovery and low leakage. Use Value: 40 µA IR at 125 °C ensures minimal standby power loss while 500 ns trr limits snubber ring amplitude. | Use Scenario: Input-stage freewheeling diode in 48 V telecom DC brick with active OR-ing control. IC Role / Device Role / Timing Role: Back-to-back protection and transient clamping in redundant power feed architecture. Use Value: AEC-Q101 qualification and 175 °C TJ max ensure field reliability in continuously powered telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R08 | Same 2 A / 800 V rating; trr = 150 ns (faster), VF = 1.15 V @ 2 A (higher), SMA package | Better for >1 MHz switching but higher conduction loss; not AEC-Q101 qualified | Prefer RS2KALH for automotive; STTH2R08 suits high-frequency industrial SMPS where qualification isn't required |
| ES2J | Same 2 A / 600 V rating; trr = 35 ns; VF = 0.95 V @ 2 A; SMA package; no AEC-Q101 | Limited to ≤600 V systems; unsuitable for 48 V+ bus with surge margin | Select RS2KALH when 800 V VRRM and automotive qualification are mandatory; ES2J fits cost-sensitive 24 V industrial apps |
Compared with STTH2R08 and ES2J, the RS2KALH uniquely combines AEC-Q101 qualification, 800 V rating, and 500 ns trr - making it the only option among the three validated for automotive under-hood DC/DC conversion with 2 A continuous current.
Availability
RS2KALH is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC/DC converters, and telecom power bricks requiring stable component supply and long-term lifecycle assurance.
Supply support for RS2KALH 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, and MOSFETs, with global distribution and automotive qualification capabilities.
The RS2KALH belongs to TSC's RS2xALH fast recovery rectifier family, designed specifically for high-reliability automotive and industrial power conversion where AEC-Q101 compliance, thermal robustness, and consistent fast recovery performance are essential.
FAQ
What is the peak repetitive reverse voltage (VRRM) of the RS2KALH?
The RS2KALH has a peak repetitive reverse voltage (VRRM) of 800 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2304). This rating defines the maximum reverse voltage the RS2KALH can block repeatedly without breakdown under normal operating conditions and is critical for selecting appropriate safety margins in 48 V or 60 V automotive and industrial power systems.
Is the RS2KALH qualified for automotive applications?
Yes, the RS2KALH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - confirming its suitability for under-hood automotive applications such as engine control units and body control modules where reliability under thermal and mechanical stress is mandatory.
What is the forward voltage drop of the RS2KALH at 2 A and 25°C?
The forward voltage drop (VF) of the RS2KALH is 1.06 V at 2 A and 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction losses - for example, resulting in approximately 2.12 W of power dissipation at full 2 A load, which must be considered in thermal design.
Does the RS2KALH have a defined reverse recovery time (trr)?
Yes, the RS2KALH has a maximum reverse recovery time (trr) of 500 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is documented in the Electrical Specifications section and confirms the device's suitability for high-frequency switching applications such as DC/DC converters operating up to 500 kHz, where slower recovery would increase switching losses and EMI.
What package type does the RS2KALH use, and what are its key mechanical features?
The RS2KALH uses the Thin SMA package (JEDEC DO-221AC variation), measuring 4.40 mm × 2.70 mm × 0.75 mm max height. Key mechanical features include matte tin-plated leads compliant with J-STD-002, cathode polarity marked by a band, moisture sensitivity level 1 (no bake required), and UL 94V-0 molding compound - all supporting automated SMT assembly and high-reliability deployment.
RS2KALH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS2KALH FAQ
1.How can I place an order for RS2KALH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS2KALH 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 RS2KALH reliable?
The price and inventory of RS2KALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS2KALH is usually 5 days.
3.What payment methods are accepted for RS2KALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS2KALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS2KALH?
RS2KALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS2KALH 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 RS2KALH?
For technical support, including RS2KALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS2KALH requirements.
6.How does Aetrix verify that RS2KALH is sourced from the original manufacturer or authorized distributors?
All RS2KALH 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 RS2KALH meets industry standards.
7.What is the process for return or replacement of RS2KALH?
All RS2KALH units undergo pre-shipment inspection (PSI). If there is an issue with RS2KALH, 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 RS2KALH part is unused and in its original packaging.
Return procedure for RS2KALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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