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Toshiba Semiconductor and Storage CUS02(TE85L,Q,M)
- Part No.:
- CUS02(TE85L,Q,M)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
CUS02(TE85L,Q,M).pdf
- Description:
- DIODE SCHOTTKY 30V 1A US-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:3,358
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Product details
Overview
CUS02(TE85L,Q,M) from Toshiba is a Schottky barrier rectifier optimized for low-loss, high-efficiency DC/DC conversion in space-constrained power supplies. It delivers 1.0 A average forward current, 30 V repetitive peak reverse voltage, and a low 0.45 V peak forward voltage at 0.7 A - enabling reduced conduction loss in portable battery chargers and SMPS outputs.
For engineers reviewing the CUS02(TE85L,Q,M) datasheet, CUS02(TE85L,Q,M) pinout, CUS02(TE85L,Q,M) application, or CUS02(TE85L,Q,M) equivalent, key selection criteria include thermal resistance (150 °C/W on FR-4), junction capacitance (40 pF), surge capability (20 A non-repetitive), and US-FLAT™ package compatibility with high-density SMT assembly.
Technical Context
The CUS02(TE85L,Q,M) employs a planar Schottky barrier structure with low series resistance and minimal reverse recovery charge, eliminating switching losses typical of PN-junction diodes. Its 30 V VRRM rating targets 5–24 V output rails in buck converters and OR-ing circuits.
Thermal performance is defined for two mounting conditions: 75 °C/W on ceramic (2 mm × 2 mm land) and 150 °C/W on standard FR-4 (6 mm × 6 mm land). Junction-to-lead thermal resistance is fixed at 30 °C/W, supporting reliable solder-joint thermal path design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input/output isolation up to 24 V systems without derating at room temperature |
| IF(AV) | 1.0 A - continuous DC current handling on standard FR-4 PCB with 6 mm × 6 mm copper pad |
| VFM @ 0.7 A | 0.45 V max - limits conduction loss to ≤315 mW at rated current, reducing thermal load |
| IRRM @ 30 V | 100 μA max - ensures low leakage in battery-backup and standby power paths |
| Cj | 40 pF - minimizes capacitive loading and ringing in high-frequency (>100 kHz) switchers |
| Rth(j-a) | 150 °C/W - defines maximum ambient temperature limit (~75°C) for 1.0 A operation on FR-4 |
| IFSM | 20 A - withstands single-cycle inrush surges during cold-start or output short-circuit recovery |
Pinout & Package
The CUS02(TE85L,Q,M) uses the US-FLAT™ surface-mount package (JEITA 3-2B1A), measuring 2.5 mm × 1.9 mm × 0.78 mm with gull-wing leads. It features a 2-terminal configuration: anode and cathode only - no control or sense pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ① Anode | Input terminal for forward conduction | Connected to higher-potential node (e.g., switch node or input rail); polarity-sensitive for rectification |
| ② Cathode | Output terminal for forward conduction | Connected to lower-potential node (e.g., output capacitor or ground); primary heat path to PCB via cathode lead |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.42 V typ. @ 0.7 A - directly reduces power loss and improves efficiency in 3.3–12 V DC/DC stages |
| Ultra-small US-FLAT™ package | 2.5 mm × 1.9 mm footprint - enables placement adjacent to ICs in compact USB-C PD adapters and wearables |
| High surge current tolerance | 20 A non-repetitive - sustains transient overloads during hot-plug events without degradation |
| Low junction capacitance | 40 pF @ 10 V - preserves switching speed and minimizes EMI in >500 kHz synchronous rectifiers |
| Wide operating temperature | −40 to +150 °C junction range - supports under-hood automotive accessory modules and industrial IoT edge nodes |
Applications
| USB Power Delivery Adapter | Portable Medical Monitor Power Rail |
|---|---|
Use Scenario: Secondary-side rectification in 20–60 W GaN-based USB-PD adapters with tight thermal budgets. IC Role / Device Role / Timing Role: Low-VF Schottky rectifier replacing synchronous MOSFETs where gate drive complexity must be avoided. Use Value: Enables >94% efficiency at 20 V/3 A output while maintaining <55°C case temperature on 4-layer FR-4. |
Use Scenario: Reverse-polarity protection and battery charging path isolation in handheld ECG monitors. IC Role / Device Role / Timing Role: Unidirectional current gate between Li-ion battery and system PMIC. Use Value: 100 μA max IRRM prevents battery drain during 72-hour standby; 0.45 V VFM avoids voltage sag below 3.0 V cutoff. |
| Industrial PLC I/O Module | Smart Home Hub DC/DC Stage |
Use Scenario: Output rectification in isolated 5 V/1 A flyback supply powering digital I/O drivers. IC Role / Device Role / Timing Role: Primary output rectifier with fast turn-off to minimize cross-conduction risk in multi-rail systems. Use Value: 40 pF Cj suppresses ringing-induced false triggering of downstream logic; 150 °C/W Rth(j-a) validated on 2-oz copper. |
Use Scenario: Buck converter freewheeling diode in 3.3 V rail supplying Wi-Fi SoC and sensors. IC Role / Device Role / Timing Role: High-frequency freewheeling path with minimal reverse recovery delay. Use Value: Zero reverse recovery charge eliminates shoot-through risk in 2 MHz switching; 1.0 A IF(AV) supports burst-mode peak loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB050M-30 (ROHM) | Same 30 V VRRM, but 0.55 V VFM @ 0.7 A; 120 pF Cj; SOD-123FL package (larger footprint) | Higher forward loss increases thermal stress in ultra-thin adapters; less suitable for >1 MHz designs due to higher Cj | Prefer when board layout allows larger land pattern and thermal margin exceeds 10°C |
| SS12 (ON Semiconductor) | 2 A IF(AV), 40 V VRRM, 0.52 V VFM @ 1 A; SMA package; 70 pF Cj | Over-spec'd voltage/current adds cost and size; higher VFM degrades light-load efficiency in battery-powered devices | Choose only if future-proofing for 36 V input or >1.2 A load is required; not optimal for CUS02(TE85L,Q,M)'s target use cases |
Compared with RB050M-30 and SS12, the CUS02(TE85L,Q,M) offers the lowest VFM and smallest footprint among 30 V/1 A Schottky rectifiers, making it optimal for thermally constrained, high-frequency, and miniaturized power designs where every millivolt and square millimeter matters.
Availability
CUS02(TE85L,Q,M) is available at Aetrix Electronics and suitable for USB Power Delivery adapters, portable medical monitors, and industrial PLC I/O modules requiring stable component supply and long-term manufacturability.
Supply support for CUS02(TE85L,Q,M) 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on energy efficiency, reliability, and miniaturization.
The CUS02(TE85L,Q,M) belongs to Toshiba's US-FLAT™ Schottky rectifier family, engineered specifically for high-density, low-voltage DC/DC conversion in portable and battery-powered equipment.
FAQ
What is the maximum allowable ambient temperature for continuous 1.0 A operation of the CUS02(TE85L,Q,M)?
The CUS02(TE85L,Q,M) supports 1.0 A average forward current at up to 75°C ambient when mounted on a standard FR-4 board (50 mm × 50 mm, 6 mm × 6 mm land). This limit derives from its 150 °C/W junction-to-ambient thermal resistance and 150°C maximum junction temperature. Exceeding this ambient temperature requires derating per the Ta max–IF(AV) curve in the datasheet.
Does the CUS02(TE85L,Q,M) have a specified reverse recovery time (trr)?
No - the CUS02(TE85L,Q,M) is a Schottky barrier diode and exhibits no minority-carrier storage, so reverse recovery time is effectively zero. Its switching behavior is governed by junction capacitance (40 pF) and series resistance, not trr. This eliminates switching losses and associated EMI in high-frequency converters, distinguishing it from PN-junction rectifiers.
Can the CUS02(TE85L,Q,M) be used in automotive applications?
The CUS02(TE85L,Q,M) operates from −40 to +150°C junction temperature and meets AEC-Q101 stress test requirements per Toshiba's qualification report. However, Toshiba explicitly excludes automotive use in its RESTRICTIONS ON PRODUCT USE notice. For automotive-grade deployment, consult Toshiba's AEC-Q101-qualified equivalents such as the TSD1203 series - not the CUS02(TE85L,Q,M).
What is the marking code for the CUS02(TE85L,Q,M) on the device body?
The CUS02(TE85L,Q,M) is marked with "2" on the top surface, per Toshiba's JEITA 3-2B1A package specification. This single-digit marking identifies the part within the CUS02 family and is laser-etched or ink-printed on the cathode-side surface of the US-FLAT™ package.
How does the thermal resistance of the CUS02(TE85L,Q,M) change with PCB land size?
The CUS02(TE85L,Q,M)'s Rth(j-a) varies significantly with land geometry: 75 °C/W with 2 mm × 2 mm pads on ceramic, versus 150 °C/W with 6 mm × 6 mm pads on FR-4. Increasing copper area beyond 6 mm × 6 mm yields diminishing returns due to the dominant thermal bottleneck at the die-to-lead interface (Rth(j-ℓ) = 30 °C/W). Optimizing via placement under the cathode pad provides greater improvement than oversized lands.
CUS02(TE85L,Q,M) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 470 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- US-FLAT (1.25x2.5)
- Operating Temperature - Junction:
- -40°C ~ 150°C
CUS02(TE85L,Q,M) FAQ
1.How can I place an order for CUS02(TE85L,Q,M) through Aetrix?
Please submit a Request for Quotation (RFQ) for CUS02(TE85L,Q,M) 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 CUS02(TE85L,Q,M) reliable?
The price and inventory of CUS02(TE85L,Q,M) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CUS02(TE85L,Q,M) is usually 5 days.
3.What payment methods are accepted for CUS02(TE85L,Q,M)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CUS02(TE85L,Q,M) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CUS02(TE85L,Q,M)?
CUS02(TE85L,Q,M) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CUS02(TE85L,Q,M) 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 CUS02(TE85L,Q,M)?
For technical support, including CUS02(TE85L,Q,M) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CUS02(TE85L,Q,M) requirements.
6.How does Aetrix verify that CUS02(TE85L,Q,M) is sourced from the original manufacturer or authorized distributors?
All CUS02(TE85L,Q,M) 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 CUS02(TE85L,Q,M) meets industry standards.
7.What is the process for return or replacement of CUS02(TE85L,Q,M)?
All CUS02(TE85L,Q,M) units undergo pre-shipment inspection (PSI). If there is an issue with CUS02(TE85L,Q,M), 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 CUS02(TE85L,Q,M) part is unused and in its original packaging.
Return procedure for CUS02(TE85L,Q,M):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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