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Taiwan Semiconductor Corporation US1J
- Part No.:
- US1J
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1J.pdf
- Description:
- DIODE GEN PURP 600V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:13,755
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Product details
Overview
US1J from Taiwan Semiconductor is a 600 V, 1 A ultrafast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 1.7 V max forward voltage at 1 A and 75 ns reverse recovery time; used in snubber networks and DC-DC converter freewheeling paths.
For engineers reviewing the US1J datasheet, US1J pinout, US1J application, or US1J equivalent, key selection criteria include repetitive peak reverse voltage (600 V), junction-to-lead thermal resistance (27 °C/W), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for high-reliability industrial power designs.
Technical Context
The US1J is a single-die, glass-passivated silicon PN junction rectifier optimized for high-frequency switching applications. Its ultrafast recovery (75 ns typ.) and low junction capacitance (10 pF at 1 MHz, 4 V) minimize switching losses in SMPS topologies.
Designed for automated placement and reflow soldering, it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. Cathode polarity is marked by a visible band on the DO-214AC molded case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports input rectification up to 420 V RMS in offline AC-DC converters |
| IF | 1 A continuous - suitable for low-to-medium power DC-DC stages with average current ≤1 A |
| trr | 75 ns max - enables operation at ≥100 kHz switching frequencies with reduced turn-off loss |
| VF | 1.7 V max at 1 A, 25°C - limits conduction loss to ≤1.7 W per device under full load |
| RθJL | 27 °C/W - allows 1.1 W power dissipation before reaching 150°C junction limit at 25°C lead temp |
| IR | 5 µA max at 600 V, 25°C - ensures minimal leakage in high-impedance hold-up or sensing circuits |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, matte tin-plated leads, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential side of circuit; accepts 1 A continuous forward current |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; withstands 600 V reverse bias; connects to higher-potential node in freewheeling path |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term reliability under thermal cycling and humidity exposure per J-STD-020 Level 1 |
| Ultrafast recovery (75 ns) | Reduces reverse recovery charge (Qrr) to support high-frequency flyback and resonant converter designs |
| Low VF (1.7 V max) | Lowers conduction loss vs. standard fast rectifiers, improving efficiency in 12–48 V output DC-DC stages |
| DO-214AC (SMA) footprint | Standardized 2-pin SMD outline compatible with automated pick-and-place and reflow profiles (J-STD-020) |
Applications
| DC-DC Converter Freewheeling | Snubber Network Clamping |
|---|---|
Use Scenario: Freewheeling path in synchronous buck or flyback converters delivering 5–24 V at ≤1 A output. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current recirculation during high-side switch off-time. Use Value: 75 ns trr and 1.7 V VF minimize energy loss and heat generation during each switching cycle. | Use Scenario: RCD snubber across MOSFET drain-source in offline SMPS operating at 65–130 kHz. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback energy during MOSFET turn-off. Use Value: 600 V VRRM rating safely handles reflected transients; 10 pF CJ minimizes capacitive loading on snubber RC timing. |
| Switching Inverter Output Stage | LED Driver Flyback Secondary |
Use Scenario: Output rectification in 100–300 W isolated DC-AC inverters with 200–400 V DC bus. IC Role / Device Role / Timing Role: High-voltage output rectifier converting transformer secondary AC to regulated DC bus. Use Value: 600 V rating accommodates peak inverse voltage under worst-case load and line transients. | Use Scenario: Secondary-side rectification in constant-current LED drivers powering 12–24 V strings. IC Role / Device Role / Timing Role: Isolated output rectifier delivering low-noise DC to LED load with minimal EMI. Use Value: Low IR (5 µA @ 25°C) prevents dark-current leakage that could cause LED flicker or standby power exceedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 600 V, 1 A, 75 ns trr, but VF = 1.8 V max; TO-220AC package | Requires through-hole mounting and heatsinking; not suitable for space-constrained SMD layouts | Select when board-level thermal management allows TO-220 footprint and higher VF is acceptable |
| MBR160 | 60 V VRRM only; Schottky structure; VF = 0.75 V typ.; no reverse recovery | Not rated for 600 V systems; limited to low-voltage DC-DC outputs ≤48 V | Choose only for <60 V applications where ultra-low VF outweighs voltage limitation |
Compared with STTH1R06 and MBR160, the US1J uniquely balances 600 V capability, SMD DO-214AC packaging, and 75 ns trr-making it the only viable option for compact, high-voltage, high-frequency freewheeling in modern SMT power supplies.
Availability
US1J is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, and lighting applications requiring stable component supply and J-STD-020 Level 1 moisture handling.
Supply support for US1J 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 industrial and consumer power markets.
The US1J belongs to TSC's US1x ultrafast rectifier family, engineered specifically for high-efficiency, high-frequency switching power supplies where low trr, controlled VF, and robust SMD packaging are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for US1J?
The US1J has a VRRM rating of 600 V, verified per Taiwan Semiconductor's N2102 datasheet revision. This value defines the highest instantaneous reverse voltage the US1J can block repeatedly without breakdown. It is critical for selecting appropriate derating margins in offline AC-DC and high-bus DC-DC designs where transient overvoltages may occur.
Does US1J have a specified junction-to-ambient thermal resistance (RθJA)?
Yes, the US1J has a typical RθJA of 75 °C/W, measured under standard JEDEC test conditions (single device on 1-inch² FR-4 board with 2 oz copper). This parameter helps estimate temperature rise in natural-convection environments; however, for reliable thermal design, RθJL (27 °C/W) should be used with PCB copper pour and thermal vias.
Is US1J RoHS and halogen-free compliant?
Yes, the US1J is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor documentation. The molding compound contains no brominated flame retardants or chlorine-based additives, supporting environmentally regulated industrial and consumer product certifications.
What is the reverse recovery time (trr) specification for US1J?
The US1J has a maximum reverse recovery time (trr) of 75 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast recovery enables efficient operation in switching power supplies above 100 kHz, reducing switching losses compared to standard recovery rectifiers.
Can US1J be used as a direct replacement for US1M in a 1000 V design?
No, US1J cannot replace US1M in a 1000 V design because its VRRM is 600 V versus US1M's 1000 V. Substituting US1J would risk catastrophic failure under rated reverse stress. Always match VRRM to the peak inverse voltage requirement of the target circuit, including safety margin.
US1J 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):
- 600 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1J FAQ
1.How can I place an order for US1J through Aetrix?
Please submit a Request for Quotation (RFQ) for US1J 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 US1J reliable?
The price and inventory of US1J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1J is usually 5 days.
3.What payment methods are accepted for US1J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1J?
US1J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1J 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 US1J?
For technical support, including US1J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1J requirements.
6.How does Aetrix verify that US1J is sourced from the original manufacturer or authorized distributors?
All US1J 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 US1J meets industry standards.
7.What is the process for return or replacement of US1J?
All US1J units undergo pre-shipment inspection (PSI). If there is an issue with US1J, 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 US1J part is unused and in its original packaging.
Return procedure for US1J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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