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Taiwan Semiconductor Corporation RS1MH
- Part No.:
- RS1MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
RS1MH.pdf
- Description:
- DIODE GEN PURP 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:14,779
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Product details
Overview
RS1MH from Taiwan Semiconductor is a 1A, 1000V fast recovery surface-mount rectifier in DO-214AC (SMA) package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 1 A, and AEC-Q101 qualification for automotive use. It serves as primary-side high-voltage rectification in DC/DC converters and snubber circuits.
For engineers reviewing the RS1MH datasheet, RS1MH pinout, RS1MH application, or RS1MH equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (RθJL = 30°C/W), junction temperature range (–55°C to +175°C), and AEC-Q101 compliance for under-hood automotive deployment.
Technical Context
The RS1MH is a single-die, glass-passivated silicon PN junction rectifier optimized for fast switching in high-voltage, moderate-current applications. Its 1000 V VRRM, 30 A IFSM, and 500 ns trr enable efficient operation in flyback and snubber topologies where rapid turn-off minimizes switching losses.
Thermally, it delivers RθJA = 105°C/W (free-air) and RθJL = 30°C/W (lead-mounted), supporting reliable power dissipation in compact automotive and industrial PCB layouts. Moisture sensitivity level is J-STD-020 Level 1, enabling standard reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in 800 V AC-input or high-voltage DC bus systems |
| IF | 1 A continuous - suitable for low-to-moderate power DC/DC stages up to ~15 W with proper heatsinking |
| trr | 500 ns - enables operation at switching frequencies up to ~200 kHz with controlled reverse recovery loss |
| VF (max) | 1.3 V @ 1 A, 25°C - limits conduction loss to ≤1.3 W at full rated current |
| RθJL | 30°C/W - allows direct lead-to-PCB thermal path for improved power handling over free-air ratings |
| TJ max | +175°C - enables operation in under-hood automotive environments without derating below 150°C ambient |
| IR (max) | 50 µA @ 125°C - ensures low leakage in high-temperature snubber and hold-up capacitor discharge paths |
Pinout & Package
DO-214AC (SMA) surface-mount package with molded plastic body (UL 94V-0), matte tin-plated leads, and cathode band polarity marking. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return) |
| Cathode | Current exit terminal during forward conduction; marked by band | Connected to output rail or filter capacitor positive; defines direction of unidirectional current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test conditions |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Fast recovery (500 ns) | Reduces reverse recovery charge (Qrr) and associated switching loss vs. general-purpose rectifiers |
| J-STD-020 Level 1 MSL | Permits unlimited floor life and standard reflow profile without preconditioning or baking |
| Halogen-free & RoHS compliant | Meets automotive OEM environmental requirements and facilitates end-of-life recycling |
Applications
| DC/DC Converter Primary Rectification | Automotive LED Headlamp Driver |
|---|---|
Use Scenario: High-voltage flyback converter converting 400 V DC bus to 12 V for auxiliary systems. IC Role / Device Role / Timing Role: Primary-side unidirectional current valve rectifying transformer secondary output. Use Value: 1000 V VRRM withstands reflected voltage spikes; 500 ns trr minimizes switching loss at 100–200 kHz operation. | Use Scenario: Constant-current LED driver in vehicle headlamps with 24 V input and transient surge protection. IC Role / Device Role / Timing Role: Input rectifier and snubber clamp diode absorbing inductive kickback from buck controller MOSFET. Use Value: AEC-Q101 qualification ensures reliability across –40°C to +125°C ambient; 30 A IFSM handles load dump transients. |
| Snubber Network Clamp | Industrial Power Supply Input Stage |
Use Scenario: RCD snubber across MOSFET drain-source in offline SMPS to suppress voltage overshoot. IC Role / Device Role / Timing Role: Fast-recovery clamp diode conducting snubber capacitor discharge pulse. Use Value: 500 ns trr ensures clean energy transfer to RC network; low CJ (10 pF) avoids capacitive loading of snubber timing. | Use Scenario: Input bridge rectifier replacement in 24 V/48 V industrial PSU with wide-input-range PFC front-end. IC Role / Device Role / Timing Role: Discrete high-voltage rectifier in discrete or hybrid rectification stage. Use Value: DO-214AC footprint enables drop-in replacement for legacy SMA devices; 175°C TJ max supports sealed enclosure thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 1 A, 600 V VRRM, 150 ns trr, TO-277 package | Limited to ≤600 V systems; faster recovery but lower voltage rating | Select when system VRRM margin < 600 V and trr-driven efficiency is critical |
| ES1J | 1 A, 600 V VRRM, 35 ns trr, DO-214AC package | Same footprint but only 600 V rating; not AEC-Q101 qualified | Choose for cost-sensitive non-automotive designs requiring ultra-fast recovery |
Compared with STTH1R06 and ES1J, the RS1MH uniquely combines 1000 V rating, AEC-Q101 qualification, and DO-214AC compatibility-making it the only option among the three validated for 800–1000 V automotive primary rectification with production-grade reliability.
Availability
RS1MH is available at Aetrix Electronics and suitable for automotive lighting, DC/DC converter primary-side rectification, and industrial snubber networks requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for RS1MH 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 RS1MH belongs to TSC's RS1xH fast recovery rectifier family, engineered specifically for high-reliability, high-voltage rectification in automotive power systems and industrial switching supplies where AEC-Q101 compliance and thermal robustness are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS1MH?
The RS1MH has a VRRM of 1000 V, verified per Taiwan Semiconductor's B2304 datasheet. This rating allows the RS1MH to safely block reverse voltages up to 1000 V in continuous operation, making it suitable for high-voltage DC/DC converters and automotive 48 V–800 V system interfaces. Derating is recommended above 150°C junction temperature.
Is RS1MH qualified for automotive applications?
Yes, RS1MH is AEC-Q101 qualified, confirming its suitability for automotive under-hood and chassis applications. The qualification covers temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock testing. This makes RS1MH appropriate for use in car lighting, engine control modules, and ADAS power supplies where reliability across –40°C to +125°C ambient is required.
What is the reverse recovery time (trr) of RS1MH and how does it impact switching performance?
The RS1MH has a reverse recovery time of 500 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value directly affects switching loss in high-frequency converters: shorter trr reduces reverse recovery charge (Qrr) and associated diode dissipation. At 200 kHz, RS1MH enables higher efficiency than general-purpose rectifiers with trr > 2 µs.
Does RS1MH have the same package and footprint as RS1AH through RS1KH?
Yes, all variants from RS1AH to RS1MH-including RS1MH-use the DO-214AC (SMA) package with identical mechanical dimensions, pad layout, and polarity marking (cathode band). This enables consistent PCB design across the family, allowing voltage-rating scalability without layout changes. The marking code "RS1M" on the device body identifies the 1000 V version.
What is the thermal resistance from junction to lead (RθJL) for RS1MH, and why does it matter?
The RS1MH has an RθJL of 30°C/W, meaning each watt of power dissipated raises the junction temperature 30°C above the lead temperature. This parameter is critical for thermal design: when leads are soldered to large copper planes or heatsinked pads, RθJL dominates over RθJA, enabling higher continuous current capability than free-air ratings suggest. It supports robust thermal management in space-constrained automotive modules.
RS1MH 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):
- 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:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1MH FAQ
1.How can I place an order for RS1MH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MH 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 RS1MH reliable?
The price and inventory of RS1MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MH is usually 5 days.
3.What payment methods are accepted for RS1MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MH?
RS1MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MH 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 RS1MH?
For technical support, including RS1MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MH requirements.
6.How does Aetrix verify that RS1MH is sourced from the original manufacturer or authorized distributors?
All RS1MH 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 RS1MH meets industry standards.
7.What is the process for return or replacement of RS1MH?
All RS1MH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MH, 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 RS1MH part is unused and in its original packaging.
Return procedure for RS1MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RS1MH Tags
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