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Taiwan Semiconductor Corporation RABS20M
- Part No.:
- RABS20M
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
RABS20M.pdf
- Description:
- BRIDGE RECT 1PHASE 1KV 2A ABS
- Quantity:
- Payment:
- Shipping:
Inventory:27,004
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Product details
Overview
RABS20M from Taiwan Semiconductor is a 2 A, 1000 V fast recovery quad bridge rectifier in ABS package, featuring 300 ns max reverse recovery time, 1.16 V forward voltage at 2 A/25°C, and 50 A surge capability - used in AC-DC front-end stages of compact SMPS and LED drivers.
For engineers reviewing the RABS20M datasheet, RABS20M pinout, RABS20M application, or RABS20M equivalent, key selection factors include its UL-recognized ABS molding, J-STD-020 Level 1 moisture sensitivity, 150°C junction rating, and compatibility with automated SMT placement on 20 mm × 20 mm Cu pads.
Technical Context
The RABS20M integrates four fast recovery diodes in a single-phase bridge configuration with glass-passivated junctions, enabling high-efficiency rectification in high-frequency switching topologies. Its 300 ns trr and low 15 pF junction capacitance per diode support operation up to several hundred kHz without excessive switching loss.
Thermal design is supported by RθJL = 15°C/W and RθJC = 6°C/W, verified on standard 20 mm × 20 mm PCB copper pads. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 1 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 2 A continuous - supports sustained output power up to ~40 W in 100–240 VAC input SMPS |
| Peak Reverse Voltage (VRRM) | 1000 V - enables use in universal-input offline converters with high line transients |
| Reverse Recovery Time (trr) | ≤300 ns - reduces switching losses and EMI in 65–130 kHz flyback and PFC stages |
| Surge Current (IFSM) | 50 A (8.3 ms) - withstands cold-start inrush into bulk capacitors without failure |
| Junction Temp Range (TJ) | –55°C to +150°C - suitable for enclosed, thermally constrained lighting and adapter environments |
| Thermal Resistance (RθJL) | 15°C/W - allows direct thermal coupling to PCB copper for passive cooling in space-limited designs |
Pinout & Package
Package: ABS - molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity marked on top surface, weight 0.096 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Bridge AC input terminal | Accepts one leg of AC line; must be routed with clearance ≥2.5 mm for 1000 V isolation |
| AC2 | Bridge AC input terminal | Accepts second leg of AC line; paired with AC1 to form full-wave input node |
| + (Anode Output) | Positive DC output | Connects to bulk capacitor positive rail; carries full load current with 1.16 V drop at 2 A |
| – (Cathode Output) | Negative DC output / circuit ground reference | Serves as return path; requires low-inductance layout to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage performance (<5 µA @ 25°C, <90 µA @ 125°C) and long-term reliability under humidity stress |
| UL Recognition (E-326854) | Validates flammability, creepage, and construction compliance for end-product safety certification (e.g., UL 62368-1) |
| J-STD-020 Level 1 MSL | Permits unlimited floor life and reflow without baking - simplifies SMT line logistics |
| RoHS & halogen-free | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21 for environmentally compliant manufacturing |
| Quad bridge integration | Reduces component count vs. discrete diode solutions - saves ~12 mm² PCB area and eliminates 3 solder joints |
Applications
| LED Driver Power Supply | USB-C Wall Adapter |
|---|---|
Use Scenario: Rectifying 90–264 VAC input before PFC or buck converter in constant-current LED drivers. IC Role / Device Role / Timing Role: Primary-side AC-DC bridge rectifier providing isolated DC bus for downstream regulation. Use Value: 1000 V VRRM ensures margin against 1.5× peak line surges; 300 ns trr minimizes switching loss in 100 kHz+ dimmable drivers. | Use Scenario: Input rectification stage in compact 30–65 W USB-C PD adapters with tight thermal envelopes. IC Role / Device Role / Timing Role: Fast-recovery bridge delivering low-loss DC input to active clamp flyback controller. Use Value: 15°C/W RθJL enables thermal transfer to PCB ground plane, avoiding heatsink need in <20 mm height designs. |
| Industrial Control Power Module | Smart Home Lighting Ballast |
Use Scenario: AC input rectification for 24 VDC auxiliary supplies in PLC I/O modules operating in 0–70°C ambient. IC Role / Device Role / Timing Role: High-surge-capable bridge handling repeated motor startup transients on shared AC lines. Use Value: 50 A IFSM (8.3 ms) sustains operation during adjacent load switching events without degradation. | Use Scenario: Integrated rectifier in DALI- or Zigbee-enabled smart bulbs with integrated AC-DC conversion. IC Role / Device Role / Timing Role: Space-constrained bridge enabling full-wave rectification within 12 mm diameter bulb base. Use Value: ABS package with 0.096 g mass and UL 94V-0 rating satisfies mechanical and flame-retardant requirements for enclosed lamp housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU2K (ON Semiconductor) | Same 2 A / 1000 V rating, but GBU package (larger footprint, higher RθJA = 65°C/W) | Requires larger PCB area and may need heatsinking above 1.2 A continuous | Choose when legacy GBU footprint compatibility is required over thermal efficiency |
| DF02MA (Vishay) | ABS package, but slower trr (500 ns typ), higher VF (1.25 V @ 2 A), and no UL recognition | Lacks safety certification for end-products requiring UL/EN 62368-1 compliance | Consider only for cost-sensitive, non-certified internal power rails |
Compared with GBU2K and DF02MA, the RABS20M delivers superior thermal performance (RθJL = 15°C/W), certified safety (UL E-326854), and faster switching (trr ≤300 ns), making it optimal for compact, certified, high-frequency SMPS where board space and regulatory approval are critical.
Availability
RABS20M is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C wall adapters requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for RABS20M 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 power and protection markets since 1979.
The RABS20M belongs to TSC's ABS-packaged fast recovery bridge rectifier family, engineered for high-density, high-reliability AC-DC conversion in consumer and industrial power supplies where safety certification, thermal efficiency, and SMT manufacturability are essential.
FAQ
What is the maximum junction temperature rating for the RABS20M?
The RABS20M has a maximum junction temperature (TJ) rating of +150°C, validated across its full operating range from –55°C to +150°C. This rating is specified in the Absolute Maximum Ratings table and confirmed by thermal characterization using standard 20 mm × 20 mm PCB copper pads. Designers must ensure that steady-state power dissipation and transient surges do not exceed this limit to maintain long-term reliability of the RABS20M.
Does the RABS20M meet RoHS and halogen-free requirements?
Yes, the RABS20M is RoHS compliant and halogen-free, as explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version C2304). These environmental qualifications are verified per EU Directive 2011/65/EU and IEC 61249-2-21, and apply to all units shipped under the RABS20M order code. No exemptions or exceptions are declared for the RABS20M.
What is the marking code printed on the RABS20M device body?
The RABS20M is marked "RA20M" on its top surface, as confirmed in the ABSOLUTE MAXIMUM RATINGS table of the datasheet (Version C2304). This marking code is used for visual identification and traceability during assembly and field service. The full part number RABS20M appears only in ordering documentation and packaging labels - not on the device itself.
Is the RABS20M suitable for automated SMT placement?
Yes, the RABS20M is explicitly designed for automated placement, as noted in its FEATURES list. Its ABS package features matte tin-plated leads compliant with J-STD-002 for solderability, and its J-STD-020 Level 1 moisture sensitivity rating permits direct placement without pre-baking. The device's standardized lead geometry and polarity marking further support reliable vision-based pick-and-place alignment in high-volume manufacturing of the RABS20M.
What is the reverse recovery time (trr) specification for the RABS20M?
The RABS20M has a maximum reverse recovery time (trr) of 300 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the ELECTRICAL SPECIFICATIONS table. This value is guaranteed across temperature and represents worst-case performance for design margining. The fast trr contributes directly to reduced switching loss and lower EMI generation in high-frequency SMPS using the RABS20M.
RABS20M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 1 kV
- Current - Average Rectified (Io):
- 2 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ABS
RABS20M FAQ
1.How can I place an order for RABS20M through Aetrix?
Please submit a Request for Quotation (RFQ) for RABS20M 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 RABS20M reliable?
The price and inventory of RABS20M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RABS20M is usually 5 days.
3.What payment methods are accepted for RABS20M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RABS20M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RABS20M?
RABS20M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RABS20M 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 RABS20M?
For technical support, including RABS20M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RABS20M requirements.
6.How does Aetrix verify that RABS20M is sourced from the original manufacturer or authorized distributors?
All RABS20M 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 RABS20M meets industry standards.
7.What is the process for return or replacement of RABS20M?
All RABS20M units undergo pre-shipment inspection (PSI). If there is an issue with RABS20M, 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 RABS20M part is unused and in its original packaging.
Return procedure for RABS20M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RABS20M Tags
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