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Taiwan Semiconductor Corporation RS1MALH
- Part No.:
- RS1MALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
RS1MALH.pdf
- Description:
- 500NS, 1A, 1000V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
RS1MALH from Taiwan Semiconductor is a 1A, 1000V fast recovery surface-mount rectifier in Thin SMA package, featuring 500ns reverse recovery time, 1.04V forward voltage at 1.0A/25°C, and AEC-Q101 qualification for automotive-grade reliability in DC/DC converters and snubber circuits.
For engineers reviewing the RS1MALH datasheet, RS1MALH pinout, RS1MALH application, or RS1MALH equivalent, key selection criteria include peak reverse voltage (1000V), surge current capability (30A @ 8.3ms), junction temperature range (–55°C to +175°C), thermal resistance (RθJL = 19°C/W), and RoHS/halogen-free compliance.
Technical Context
The RS1MALH is a single-die, glass-passivated fast recovery rectifier optimized for high-efficiency switching applications. Its 1000V VRRM, 500ns trr, and low-profile Thin SMA package enable compact, thermally robust designs in automotive and industrial power supplies.
Designed for freewheeling and snubber use, it delivers stable performance across –55°C to +175°C junction temperature with 19°C/W junction-to-lead thermal resistance when mounted on a 5mm × 5mm copper pad - critical for sustained 1A conduction under transient loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input stages in 800V-class AC/DC or high-voltage DC/DC converters without derating |
| IF | 1 A continuous - rated for steady-state output rectification in auxiliary or bias rails |
| IFSM (8.3ms) | 30 A - withstands inrush and short-circuit surge events in automotive power modules |
| trr | 500 ns - enables operation up to ~200 kHz switching frequency with minimal switching loss |
| VF @ 1A, 25°C | 1.04 V - contributes ≤1.04W conduction loss per device at full rated current |
| RθJL | 19 °C/W - allows direct thermal path to PCB copper, simplifying heatsinking in space-constrained layouts |
| Junction temp | –55°C to +175°C - qualified for under-hood automotive environments and industrial motor drives |
Pinout & Package
Package: Thin SMA (JEDEC DO-221AC variation), low-profile surface-mount package with matte tin-plated leads, moisture sensitivity level 1, and cathode polarity indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter freewheel path) |
| Cathode | Current exit point during forward conduction; marked by band | Connected to higher-potential rail (e.g., output capacitor positive terminal) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports PPAP and functional safety-aware designs |
| Glass passivated junction | Enhances long-term reliability and humidity resistance vs. epoxy-passivated alternatives in harsh environments |
| Low profile Thin SMA | Height ≤1.45 mm - enables ultra-thin power supply modules and stacked PCB assemblies |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21 - required for global OEM shipments |
| J-STD-020 Level 1 MSL | No floor life limitation - eliminates bake requirements before reflow, reducing manufacturing overhead |
Applications
| Automotive DC/DC Converters | Industrial Snubber Circuits |
|---|---|
Use Scenario: High-voltage isolated DC/DC conversion in ADAS domain controllers and battery management systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous flyback or forward topology operating at 100–200 kHz. Use Value: 1000V VRRM and 500ns trr ensure safe operation during MOSFET turn-off transients and minimize switching losses. | Use Scenario: Voltage spike suppression across IGBTs in motor drive inverters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode in RCD snubber networks. Use Value: Low trr and 30A IFSM allow rapid energy dissipation during 1–10 µs overvoltage events without thermal runaway. |
| Freewheeling in Switch-Mode Power Supplies | High-Voltage Auxiliary Power Rails |
Use Scenario: Inductor current recirculation path in non-isolated buck regulators powering FPGA or DSP cores. IC Role / Device Role / Timing Role: Unidirectional freewheeling diode completing the inductor current loop during high-side switch off-time. Use Value: 1.04V VF at 1A limits conduction loss to <1.1W, supporting >92% efficiency at light-to-moderate loads. | Use Scenario: Bias supply rectification in telecom line cards with 48V–72V input ranges requiring 1000V standoff. IC Role / Device Role / Timing Role: Input-stage rectifier handling transient surges and lightning-induced spikes. Use Value: 1000V VRRM and 175°C TJMAX provide margin against EN 61000-4-5 surge testing and ambient temperature rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 1A, 600V VRRM, 150ns trr, TO-277 package | Limited to ≤600V systems; higher switching speed but lower voltage margin | Prefer where 600V rating suffices and faster recovery is prioritized over voltage headroom |
| ES1J-M3/84A | 1A, 600V VRRM, 35ns trr, SMA package | Ultra-fast but half the reverse voltage rating; not suitable for 800–1000V bus applications | Select only when system VR stays below 420V RMS and sub-50ns recovery is mandatory |
Compared with STTH1R06 and ES1J-M3/84A, the RS1MALH trades switching speed for guaranteed 1000V operation and AEC-Q101 qualification - making it the sole choice for automotive 800V platforms and industrial 1000V DC link snubbing where voltage margin and qualification outweigh raw speed.
Availability
RS1MALH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and high-voltage auxiliary power rails requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for RS1MALH 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 automotive, industrial, and consumer markets since 1979.
The RS1MALH belongs to TSC's RS1xALH fast recovery rectifier family, engineered specifically for high-reliability, high-voltage switching power applications where AEC-Q101 qualification, thermal robustness, and consistent surge handling are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the RS1MALH?
The RS1MALH has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2304). This rating applies across the full operating junction temperature range and defines the highest reverse voltage the device can block continuously without breakdown. The RS1MALH is the highest-voltage variant in the RS1xALH series, with RS1DALH at 200V and incremental steps up to RS1MALH.
Is the RS1MALH qualified for automotive applications?
Yes, the RS1MALH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - confirming suitability for under-hood and powertrain-related automotive electronics. The RS1MALH datasheet states "AEC-Q101 qualified" as a primary feature, and its thermal and surge ratings align with automotive design requirements.
What is the forward voltage (VF) of the RS1MALH at 1.0A and 25°C?
The forward voltage (VF) of the RS1MALH is 1.04 V at 1.0A and 25°C, as specified in the Electrical Specifications table. At 125°C and 1.0A, VF drops to 0.90 V (max), reflecting the negative temperature coefficient of silicon PN junctions. These values are measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects, ensuring accuracy for switching power supply design calculations.
What package type does the RS1MALH use, and what are its key mechanical attributes?
The RS1MALH uses the Thin SMA package (JEDEC DO-221AC variation), with dimensions of 4.40 × 2.70 × 1.45 mm (L × W × H), cathode band marking, matte tin-plated leads, and moisture sensitivity level 1 per J-STD-020. Its low profile and 0.029g weight support automated placement and high-density PCB layouts, while the UL 94V-0 molding compound ensures flame resistance in safety-critical applications.
What is the reverse recovery time (trr) of the RS1MALH, and how does it compare to lower-voltage variants in the same family?
The RS1MALH has a reverse recovery time (trr) of 500 ns, measured at IF = 0.5A, IR = 1.0A, and Irr = 0.25A. This is longer than RS1DALH–RS1JALH (150–250 ns) due to the trade-off between higher voltage rating and carrier lifetime control. The 500 ns value remains suitable for switching frequencies up to ~200 kHz in practical power converter designs using this device.
RS1MALH 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):
- 1000 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 @ 1000 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
RS1MALH FAQ
1.How can I place an order for RS1MALH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MALH 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 RS1MALH reliable?
The price and inventory of RS1MALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MALH is usually 5 days.
3.What payment methods are accepted for RS1MALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MALH?
RS1MALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MALH 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 RS1MALH?
For technical support, including RS1MALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MALH requirements.
6.How does Aetrix verify that RS1MALH is sourced from the original manufacturer or authorized distributors?
All RS1MALH 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 RS1MALH meets industry standards.
7.What is the process for return or replacement of RS1MALH?
All RS1MALH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MALH, 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 RS1MALH part is unused and in its original packaging.
Return procedure for RS1MALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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