My Inquiry
My Account
Taiwan Semiconductor Corporation RS1KALH
- Part No.:
- RS1KALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
RS1KALH.pdf
- Description:
- 500NS, 1A, 800V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:27,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RS1KALH from Taiwan Semiconductor is a 1A, 800V fast recovery surface-mount rectifier in Thin SMA package, featuring 500 ns reverse recovery time, 1.04 V forward voltage at 1.0 A/25°C, and AEC-Q101 qualification for automotive use in snubber and DC/DC converter circuits.
For engineers reviewing the RS1KALH datasheet, RS1KALH pinout, RS1KALH application, or RS1KALH equivalent, key selection criteria include peak reverse voltage (800 V), thermal resistance (RθJL = 19 °C/W), junction temperature range (–55 to +175 °C), and moisture sensitivity level (J-STD-020 Level 1).
Technical Context
This device is a single-die, glass-passivated silicon junction rectifier optimized for fast switching and low conduction loss. Its 500 ns trr and 1.04 V VF at rated current support high-frequency operation in power conversion stages where efficiency and thermal management are critical.
The Thin SMA package enables automated placement and delivers low profile mounting with RθJA = 81 °C/W on a 5 mm × 5 mm Cu pad. Polarity is marked by cathode band, and terminals meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse voltage before breakdown; defines usable DC bus or snubber voltage headroom |
| IF | 1 A - Continuous forward current rating; determines steady-state power dissipation and heatsink sizing |
| trr | 500 ns - Reverse recovery time; limits minimum switching frequency and reduces switching loss in hard-switched topologies |
| VF @ 1A, 25°C | 1.04 V - Forward voltage drop; directly impacts conduction loss (Pcond ≈ IF × VF) and thermal design |
| RθJL | 19 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pad thermal path without external heatsink |
| Junction Temp Range | –55 to +175 °C - Operating temperature envelope; supports under-hood automotive and industrial ambient conditions |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; allows indefinite storage and standard reflow without baking |
Pinout & Package
Thin SMA package: surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band. Dimensions per JEDEC DO-221AC (4.40 × 2.70 × 1.20 mm), matte tin-plated leads, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to lower-potential side of load or switch node; must handle full IF and IFSM surge |
| Cathode | Output terminal for forward conduction | Marked by visible band; connects to higher-potential rail or output filter; carries return current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for under-hood ECUs |
| Glass passivated junction | Enhances long-term stability and humidity resistance; prevents surface leakage degradation in harsh environments |
| Low profile Thin SMA | 1.20 mm max height enables compact board stacking and compatibility with low-clearance enclosures |
| Fast recovery (500 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses in 100–500 kHz converters |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and JEDEC JS709E; meets automotive OEM material declarations |
Applications
| Freewheeling Diode | Snubber Network |
|---|---|
Use Scenario: Placed across inductive loads (e.g., solenoids, relays, motor windings) in automotive body control modules. IC Role / Device Role / Timing Role: Freewheeling diode providing safe path for inductive kickback during switch-off. Use Value: Prevents voltage spikes >800 V from damaging driving MOSFETs; leverages 30 A IFSM surge rating for transient energy absorption. | Use Scenario: Used in RCD snubbers across flyback transformer primary or IGBT collectors in EV onboard chargers. IC Role / Device Role / Timing Role: Fast-recovery clamp diode limiting dV/dt-induced ringing and EMI. Use Value: 500 ns trr ensures clean turn-off with minimal tail current; 800 V VRRM accommodates reflected voltage peaks in 400 V systems. |
| DC/DC Converter Output | Automotive Power Supply |
Use Scenario: Secondary-side rectifier in isolated 12 V → 3.3 V/5 V buck-derived DC/DC supplies for ADAS sensors. IC Role / Device Role / Timing Role: Synchronous rectification alternative where gate drive complexity is prohibitive. Use Value: 1.04 V VF minimizes conduction loss at 1 A load; RθJL = 19 °C/W enables direct PCB copper thermal coupling. | Use Scenario: Input rectifier in 12 V/24 V automotive power distribution units handling cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary AC/DC or DC polarity protection rectifier in front-end power stage. Use Value: AEC-Q101 qualification and –55 to +175 °C operation ensure functional safety compliance; MSL Level 1 simplifies manufacturing flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | Same 1 A / 800 V rating; trr = 500 ns; TO-220AC package (not surface-mount); RθJA = 65 °C/W | Requires through-hole mounting and larger PCB area; unsuitable for high-density automotive modules | Choose STTH1R08 only if leaded package and higher thermal mass are acceptable in non-automotive industrial designs. |
| SB180 | 1 A / 800 V Schottky; VF = 0.85 V @ 1 A; no reverse recovery (trr = N/A); TJ max = 125 °C | Lacks AEC-Q101 qualification; limited to <125 °C ambient; higher IR leakage at elevated temperature | Use SB180 only in cost-sensitive, non-automotive, low-temperature consumer applications where ultra-low VF outweighs reliability requirements. |
Compared with STTH1R08 and SB180, RS1KALH uniquely combines AEC-Q101 qualification, surface-mount Thin SMA packaging, 175 °C junction rating, and 500 ns trr-making it the only option qualified for space-constrained, high-temperature automotive power stages requiring fast recovery and robust thermal performance.
Availability
RS1KALH is available at Aetrix Electronics and suitable for automotive power distribution, DC/DC converter output rectification, and snubber networks requiring stable component supply, AEC-Q101 compliance, and high-temperature operational reliability.
Supply support for RS1KALH 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 RS1xALH series is part of TSC's AEC-Q101-qualified fast recovery rectifier product line, designed specifically for high-efficiency, high-reliability power conversion in automotive engine control, lighting, and charging systems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS1KALH?
The RS1KALH has a maximum repetitive peak 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 highest reverse-biased voltage the device can block continuously without breakdown, making RS1KALH suitable for 400 V DC bus applications with 2× safety margin. It is distinct from RS1JALH (600 V) and RS1MALH (1000 V) in the same family.
Is RS1KALH qualified for automotive applications?
Yes, RS1KALH is AEC-Q101 qualified, as explicitly stated in the FEATURES section of the Taiwan Semiconductor documentation. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), confirming suitability for automotive power modules, body control units, and infotainment power supplies operating within –55 to +175 °C junction temperature range.
What is the forward voltage (VF) of RS1KALH at 1.0 A and 25°C?
The forward voltage (VF) of RS1KALH is 1.04 V at 1.0 A and 25°C, per the Electrical Specifications table. At 125°C, VF drops to 0.90 V (max), reflecting the negative temperature coefficient of silicon PN junctions. This value directly determines conduction loss in power stages and is measured under pulse conditions (PW = 0.3 ms) to avoid self-heating effects.
What is the reverse recovery time (trr) of RS1KALH?
The reverse recovery time (trr) of RS1KALH is 500 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table. This parameter is critical for minimizing switching losses in high-frequency DC/DC converters and snubber circuits. RS1KALH shares this trr value with RS1MALH but differs from RS1JALH (250 ns) and RS1DALH (150 ns) in the same series.
What package type does RS1KALH use, and what are its key mechanical features?
RS1KALH uses the Thin SMA package per JEDEC DO-221AC (Variation AC, Issue B), with dimensions 4.40 × 2.70 × 1.20 mm. Key mechanical features include glass passivation, matte tin-plated leads compliant with J-STD-002, JESD 201 Class 2 whisker resistance, UL 94V-0 flammability rating, and cathode polarity indicated by molded band. Its MSL Level 1 rating eliminates bake requirements prior to reflow.
RS1KALH 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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 7pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1KALH FAQ
1.How can I place an order for RS1KALH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1KALH 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 RS1KALH reliable?
The price and inventory of RS1KALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1KALH is usually 5 days.
3.What payment methods are accepted for RS1KALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1KALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1KALH?
RS1KALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1KALH 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 RS1KALH?
For technical support, including RS1KALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1KALH requirements.
6.How does Aetrix verify that RS1KALH is sourced from the original manufacturer or authorized distributors?
All RS1KALH 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 RS1KALH meets industry standards.
7.What is the process for return or replacement of RS1KALH?
All RS1KALH units undergo pre-shipment inspection (PSI). If there is an issue with RS1KALH, 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 RS1KALH part is unused and in its original packaging.
Return procedure for RS1KALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RS1KALH 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…
