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Toshiba Semiconductor and Storage 1SS401(TE85L,F)
- Part No.:
- 1SS401(TE85L,F)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
1SS401(TE85L,F).pdf
- Description:
- DIODE SCHOTTKY 20V 300MA SC70
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
1SS401(TE85L,F) from TOSHIBA is a silicon epitaxial Schottky barrier diode optimized for high-speed switching applications, featuring a typical forward voltage of 0.38 V at 300 mA, reverse current ≤50 μA at 20 V, and junction capacitance of 46 pF at 1 MHz - enabling fast turn-on/turn-off in DC-DC converter freewheeling paths and signal clamping circuits.
For engineers reviewing the 1SS401(TE85L,F) datasheet, 1SS401(TE85L,F) pinout, 1SS401(TE85L,F) application, or 1SS401(TE85L,F) equivalent, key selection criteria include low VF under high IF, low IR at rated VR, SC-70 package compatibility with space-constrained layouts, and thermal operation up to 100°C ambient.
Technical Context
This Schottky diode uses an epitaxial structure to minimize minority-carrier storage time, achieving nanosecond-level switching speed without reverse recovery charge. Its low forward voltage drop directly reduces conduction loss in high-frequency power stages.
The device operates within −40°C to +100°C ambient temperature range and supports peak forward currents up to 700 mA, with thermal design constrained by 100 mW power dissipation and 125°C maximum junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 0.38 V typ. at IF = 300 mA - enables low-loss freewheeling in 1–3 MHz DC-DC converters |
| Reverse Current (IR) | ≤50 μA max. at VR = 20 V - ensures minimal leakage in battery-powered hold-up circuits |
| Junction Capacitance (CT) | 46 pF typ. at VR = 0 V, f = 1 MHz - supports clean edge integrity in 10–50 MHz signal clamping |
| Peak Reverse Voltage (VRM) | 25 V - limits use to sub-20 V rail applications such as USB-powered systems and LDO bypass paths |
| Package | SC-70 (TOSHIBA 1-2P1D) - 2-pin surface-mount footprint compatible with 0.65 mm pitch PCB assembly |
| Operating Temperature | −40°C to +100°C - suitable for industrial-grade power management in enclosed enclosures |
Pinout & Package
SC-70 package (JEITA standard), 2-terminal surface-mount device with anode and cathode exposed on bottom-side metallization; marking "1SS401" visible on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current entry point under forward bias | Connected to higher-potential node (e.g., switch node in buck converter) |
| Cathode (Pin 2) | Current exit point under forward bias | Connected to output rail or ground return path; polarity-sensitive for ESD protection orientation |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.38 V typ. at 300 mA - cuts conduction loss by ~40% vs. comparable PN diodes in 5 V input converters |
| Fast switching capability | No reverse recovery charge - eliminates switching tail current in synchronous rectifier flyback designs |
| Small junction capacitance | 46 pF - minimizes signal distortion in RF detector and high-speed logic clamp applications |
| Compact SC-70 footprint | 1.25 × 0.85 × 0.5 mm - fits 1.0 mm² board area, supporting ultra-dense portable power modules |
Applications
| DC-DC Converter Freewheeling Diode | USB Port ESD Clamping |
|---|---|
Use Scenario: Used as secondary-side freewheeling diode in non-synchronous buck converters operating at 500 kHz–2 MHz. IC Role / Device Role / Timing Role: Provides low-loss current path during high-side MOSFET off-time; no timing function but critical for duty-cycle-dependent efficiency. Use Value: 0.38 V VF reduces average conduction loss by 0.11 W vs. 0.55 V diode at 300 mA, improving light-load efficiency by ≥3.5%. | Use Scenario: Placed between USB D+ and D− lines and ground to shunt ESD transients per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Passive clamping element; responds within <1 ns to transient overvoltage events. Use Value: 50 μA IR ensures negligible standby current draw; 46 pF CT avoids signal integrity degradation at USB 2.0 data rates. |
| Signal-Level Clamping Circuit | Low-Voltage Logic Level Shifter |
Use Scenario: Limits analog sensor output swing to microcontroller ADC input range (e.g., 0–3.3 V). IC Role / Device Role / Timing Role: Voltage limiter protecting downstream circuitry; operates in forward conduction only during overvoltage excursions. Use Value: 0.16 V VF at 1 mA enables precise 3.3 V clamping threshold with ±50 mV tolerance across temperature. | Use Scenario: Translates 1.8 V logic high to 3.3 V domain using anode-referenced configuration with pull-up resistor. IC Role / Device Role / Timing Role: Unidirectional level translator leveraging Schottky forward drop; no active control or timing role. Use Value: Sub-0.22 V VF at 10 mA ensures reliable 1.8 V → 3.3 V translation with <10 ns propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RBS208M | VF = 0.45 V max. at 300 mA; IR = 100 μA max. at 20 V; same SC-70 package | Higher VF increases conduction loss in high-current DC-DC; acceptable for low-duty-cycle clamping | Prefer 1SS401(TE85L,F) where VF < 0.4 V is required at IF ≥200 mA |
| BAT54C | VF = 0.33 V typ. at 10 mA; IR = 2 μA max. at 25 V; dual-diode SC-70 package | Lower IR improves battery leakage performance; dual configuration adds routing flexibility but doubles footprint cost | Select 1SS401(TE85L,F) for single-diode, cost-sensitive, high-IF freewheeling where 0.38 V VF balances loss and leakage |
Compared with RBS208M and BAT54C, the 1SS401(TE85L,F) delivers the optimal trade-off of low VF at high IF, moderate IR, and single-diode SC-70 packaging - making it preferred for space-constrained, medium-power switching applications where conduction loss dominates system efficiency.
Availability
1SS401(TE85L,F) is available at Aetrix Electronics and suitable for DC-DC converter freewheeling, USB port ESD protection, and signal-level clamping applications requiring stable component supply and long-term industrial availability.
Supply support for 1SS401(TE85L,F) 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 and reliability for industrial and consumer systems.
The 1SS401(TE85L,F) belongs to Toshiba's legacy Schottky diode product line, engineered specifically for high-speed, low-voltage switching in compact power management and interface protection circuits.
FAQ
What is the maximum continuous forward current rating for the 1SS401(TE85L,F)?
The 1SS401(TE85L,F) has an average forward current (IO) rating of 300 mA at Ta = 25°C. Derating is required above 25°C ambient; at 85°C, IO drops to approximately 180 mA per Toshiba's thermal resistance data. This rating applies to steady-state DC operation - not pulsed conditions. The 1SS401(TE85L,F) must be used within this limit to maintain junction temperature below 125°C and ensure long-term reliability.
Does the 1SS401(TE85L,F) have a specified reverse recovery time (trr)?
No - the 1SS401(TE85L,F) is a Schottky barrier diode and exhibits no minority-carrier storage, so reverse recovery time is not defined or specified. Its switching behavior is governed solely by junction capacitance discharge, enabling effective operation in circuits up to several MHz. This absence of trr makes the 1SS401(TE85L,F) inherently faster than PN-junction diodes in high-frequency switching applications.
Is the 1SS401(TE85L,F) RoHS compliant?
Yes, the 1SS401(TE85L,F) meets EU RoHS Directive 2011/65/EU requirements, including lead-free terminations and restricted substance compliance. Toshiba confirms RoHS status in its official product change notices and environmental reports. For full compliance documentation, refer to Toshiba's public environmental portal - the 1SS401(TE85L,F) carries no exemptions and is suitable for consumer and industrial end equipment requiring RoHS certification.
What is the thermal resistance (RθJA) of the 1SS401(TE85L,F) in SC-70 package?
Toshiba does not publish a standalone RθJA value for the 1SS401(TE85L,F) in standard datasheet revisions. However, based on SC-70 package thermal performance benchmarks and JEDEC JESD51-2 test conditions, typical RθJA is estimated at 450°C/W on 1-inch² FR-4 with 2 oz copper. Actual RθJA depends heavily on PCB layout; the 1SS401(TE85L,F) requires adequate copper pour and thermal vias for sustained 300 mA operation.
Can the 1SS401(TE85L,F) be used in automotive applications?
The 1SS401(TE85L,F) is not qualified to AEC-Q101 and is not recommended for automotive safety-critical or engine-compartment applications. Its operating temperature range (−40°C to +100°C) overlaps with some cabin electronics, but Toshiba explicitly excludes automotive use in its Restrictions on Product Use notice. For automotive-grade alternatives, consider AEC-Q101-certified Schottky diodes - the 1SS401(TE85L,F) remains appropriate for industrial and consumer power management only.
1SS401(TE85L,F) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 300 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 20 V
- Capacitance @ Vr, F:
- 46pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70
- Operating Temperature - Junction:
- 125°C (Max)
1SS401(TE85L,F) FAQ
1.How can I place an order for 1SS401(TE85L,F) through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SS401(TE85L,F) 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 1SS401(TE85L,F) reliable?
The price and inventory of 1SS401(TE85L,F) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SS401(TE85L,F) is usually 5 days.
3.What payment methods are accepted for 1SS401(TE85L,F)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SS401(TE85L,F) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SS401(TE85L,F)?
1SS401(TE85L,F) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SS401(TE85L,F) 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 1SS401(TE85L,F)?
For technical support, including 1SS401(TE85L,F) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SS401(TE85L,F) requirements.
6.How does Aetrix verify that 1SS401(TE85L,F) is sourced from the original manufacturer or authorized distributors?
All 1SS401(TE85L,F) 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 1SS401(TE85L,F) meets industry standards.
7.What is the process for return or replacement of 1SS401(TE85L,F)?
All 1SS401(TE85L,F) units undergo pre-shipment inspection (PSI). If there is an issue with 1SS401(TE85L,F), 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 1SS401(TE85L,F) part is unused and in its original packaging.
Return procedure for 1SS401(TE85L,F):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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