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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Toshiba Semiconductor and Storage CRS04(TE85L)

Name: CRS04(TE85L)
Brand: Toshiba Semiconductor and Storage
SKU: CRS04(TE85L)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CRS04(TE85L)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Single Diodes

Package:: SOD-123F

Datasheet:: CRS04(TE85L).pdf

Description:: DIODE SCHOTTKY 40V 1A SFLAT

Quantity:: RFQ Add To RFQ list

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Inventory:8,460

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Product details

Overview

CRS04(TE85L) from TOSHIBA is a surface-mount Schottky barrier rectifier optimized for low-loss DC/DC conversion in compact power supplies and battery-powered portable equipment. It delivers V_F = 0.49 V (max) at 1 A, supports V_RRM = 40 V, and handles I_F(AV) = 1 A with thermal resistance R_th(j-a) = 140 °C/W on standard glass-epoxy PCBs - enabling high-efficiency, space-constrained designs in USB-powered devices and PMIC front-ends.

For engineers reviewing the CRS04(TE85L) datasheet, CRS04(TE85L) pinout, CRS04(TE85L) application, or CRS04(TE85L) equivalent, key selection criteria include forward voltage drop at rated current, junction-to-ambient thermal performance under defined board conditions, repetitive peak reverse voltage margin for transient suppression, and compatibility with S-FLAT™ footprint layout requirements for automated assembly.

Technical Context

The CRS04(TE85L) employs a planar Schottky barrier structure to minimize conduction loss and switching recovery time, making it suitable for high-frequency switching mode power supplies operating up to several hundred kHz. Its low V_F and 47 pF junction capacitance reduce both forward conduction loss and reverse recovery charge, directly improving efficiency in buck converters and OR-ing circuits.

Thermal design must account for mounting-dependent R_th(j-a): 140 °C/W on standard 6 mm × 6 mm pads (glass-epoxy) versus 70 °C/W on ceramic substrates with 2 mm × 2 mm pads. The device's T_j rating of –55°C to +150°C and derating guidance to limit T_j < 120°C under continuous operation define safe operating boundaries for sustained 1 A average current delivery.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum reverse blocking voltage before breakdown; sets minimum input-to-output differential margin in step-down regulators.
I_F(AV)	1 A - Continuous forward current capability at T_a = 31°C on specified PCB; defines steady-state output current handling in battery charging paths.
V_FM	0.49 V (max) at I_F = 1 A - Forward voltage drop determining conduction loss (P_loss ≈ 0.49 W at 1 A), critical for thermal budget in sealed enclosures.
C_j	47 pF at V_R = 10 V - Junction capacitance affecting high-frequency noise coupling and reverse recovery behavior in fast-switching topologies.
R_th(j-a)	140 °C/W - Thermal resistance on standard FR-4 board; used to calculate junction temperature rise (ΔT_j = P_diss × 140) for reliability validation.
I_FSM	20 A (50 Hz half-sine) - Non-repetitive surge rating; supports brief inrush or fault-current events without metallization failure.

Pinout & Package

CRS04(TE85L) uses Toshiba's S-FLAT™ package (JEITA code 3-2A1A), a 2-pin surface-mount plastic molded case measuring 2.8 mm × 1.2 mm × 1.2 mm, weighing 0.013 g. It features a single anode and cathode terminal with exposed cathode pad for thermal conduction.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to higher-potential node (e.g., switch node or input rail); polarity-sensitive for rectification direction.
Cathode	Output current exit point / thermal pad	Connected to lower-potential node (e.g., ground or output capacitor); soldered land provides primary heat path to PCB.

Key Features

Feature	Design Value
Low forward voltage	V_F ≤ 0.49 V at 1 A enables >90% efficiency in 3.3 V–5 V output buck converters with minimal thermal overhead.
S-FLAT™ package	2.8 mm × 1.2 mm footprint allows placement in ultra-dense layouts typical of smartphone PMICs and wearables.
High surge tolerance	20 A non-repetitive peak current withstands capacitor inrush and load-dump transients in portable battery systems.
Controlled thermal resistance	R_th(j-a) = 140 °C/W on standard FR-4 enables accurate junction temperature prediction without custom thermal vias.

Applications

USB-C Power Delivery Adapter	Wireless Earbud Charging Case
Use Scenario: Secondary-side synchronous rectification in 20 W GaN-based USB PD adapters. IC Role / Device Role / Timing Role: Low-V_F Schottky rectifier replacing MOSFET-driven synchronous rectifiers where gate drive complexity is undesirable. Use Value: Reduces conduction loss by 30% vs. 0.7 V silicon diodes, lowering heatsink requirements and enabling 15 mm height constraint compliance.	Use Scenario: Reverse-polarity protection and battery charging path isolation in Li-ion powered earbud cases. IC Role / Device Role / Timing Role: Unidirectional current gate preventing backfeed from main battery to charging IC during USB insertion. Use Value: 0.49 V V_F limits voltage drop across protection path, preserving ≥4.2 V at battery terminals during 500 mA charging.
Smartwatch PMIC Output Stage	Bluetooth Tracker Power Path
Use Scenario: Output rectification for integrated buck converter supplying 1.8 V core logic in wearable SoCs. IC Role / Device Role / Timing Role: High-frequency rectifier operating at 2 MHz switching frequency with minimal reverse recovery loss. Use Value: 47 pF C_j minimizes capacitive coupling noise into sensitive RF sections, maintaining Bluetooth LE link stability.	Use Scenario: OR-ing diode between coin-cell backup and main LiPo supply in GPS-enabled asset trackers. IC Role / Device Role / Timing Role: Automatic power source selection via forward-biased conduction path. Use Value: 1 A I_F(AV) supports simultaneous BLE transmission + GPS burst draw (up to 800 mA), avoiding brownout during location acquisition.

USB-C Power Delivery Adapter

Wireless Earbud Charging Case

Use Scenario: Secondary-side synchronous rectification in 20 W GaN-based USB PD adapters.

IC Role / Device Role / Timing Role: Low-V_F Schottky rectifier replacing MOSFET-driven synchronous rectifiers where gate drive complexity is undesirable.

Use Value: Reduces conduction loss by 30% vs. 0.7 V silicon diodes, lowering heatsink requirements and enabling 15 mm height constraint compliance.

Use Scenario: Reverse-polarity protection and battery charging path isolation in Li-ion powered earbud cases.

IC Role / Device Role / Timing Role: Unidirectional current gate preventing backfeed from main battery to charging IC during USB insertion.

Use Value: 0.49 V V_F limits voltage drop across protection path, preserving ≥4.2 V at battery terminals during 500 mA charging.

Smartwatch PMIC Output Stage

Bluetooth Tracker Power Path

Use Scenario: Output rectification for integrated buck converter supplying 1.8 V core logic in wearable SoCs.

IC Role / Device Role / Timing Role: High-frequency rectifier operating at 2 MHz switching frequency with minimal reverse recovery loss.

Use Value: 47 pF C_j minimizes capacitive coupling noise into sensitive RF sections, maintaining Bluetooth LE link stability.

Use Scenario: OR-ing diode between coin-cell backup and main LiPo supply in GPS-enabled asset trackers.

IC Role / Device Role / Timing Role: Automatic power source selection via forward-biased conduction path.

Use Value: 1 A I_F(AV) supports simultaneous BLE transmission + GPS burst draw (up to 800 mA), avoiding brownout during location acquisition.

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	V_RRM = 30 V, V_F = 0.45 V (max) at 1 A, same S-FLAT™ package	Limited to ≤30 V input rails; unsuitable for 36 V industrial USB PD or 40 V automotive accessory inputs	Select when input voltage stays below 28 V and lowest possible V_F is prioritized over reverse voltage margin.
SS14	V_RRM = 40 V, V_F = 0.5 V (max) at 1 A, SMA package (4.5 mm × 2.7 mm)	2.5× larger footprint; requires rework of land pattern and increases board area by 320%	Choose only if existing SMA-compatible layout exists and no redesign for S-FLAT™ is feasible.

Compared with RB050M-30 and SS14, CRS04(TE85L) uniquely balances 40 V reverse rating, sub-0.5 V forward drop, and ultra-compact S-FLAT™ packaging - making it optimal for next-generation portable power stages where voltage margin, efficiency, and board space are simultaneously constrained.

Availability

CRS04(TE85L) is available at Aetrix Electronics and suitable for USB-C power adapters, wireless earbud charging cases, and smartwatch PMIC designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for CRS04(TE85L) 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 is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and memory solutions, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The CRS04(TE85L) belongs to Toshiba's S-FLAT™ Schottky rectifier product line, engineered specifically for miniaturized, high-efficiency DC/DC conversion in battery-powered consumer electronics and portable industrial tools.

FAQ

What is the maximum junction temperature for CRS04(TE85L) during continuous operation?

The absolute maximum junction temperature for CRS04(TE85L) is 150°C, but Toshiba recommends limiting T_j to below 120°C under continuous operation to ensure long-term reliability. This derating guideline applies regardless of ambient temperature and must be verified using actual power dissipation (P_diss = V_F × I_F) and measured R_th(j-a) for the specific PCB layout. CRS04(TE85L)'s thermal performance is validated on both glass-epoxy and ceramic substrates per its datasheet test conditions.

Does CRS04(TE85L) have a documented pin-to-pin replacement?

No documented pin-to-pin replacement for CRS04(TE85L) is published by Toshiba. While RB050M-30 shares the same S-FLAT™ package and pinout, its lower 30 V V_RRM rating makes it unsuitable as a direct substitute in 40 V-rated applications. CRS04(TE85L)'s unique combination of 40 V rating, 0.49 V V_F, and JEITA 3-2A1A footprint requires explicit validation before substitution - CRS04(TE85L) must be evaluated per circuit stress conditions.

How does the thermal resistance of CRS04(TE85L) vary with PCB layout?

CRS04(TE85L)'s R_th(j-a) varies significantly with board construction: it is 140 °C/W on standard 50 mm × 50 mm glass-epoxy boards with 6 mm × 6 mm solder lands, but drops to 70 °C/W on ceramic substrates with 2 mm × 2 mm lands. Layout changes - including copper area, via count under the cathode pad, and board thickness - directly impact thermal performance. CRS04(TE85L)'s datasheet provides curves for r_th(j-a) vs. time to support transient thermal analysis in pulsed-load applications.

Is CRS04(TE85L) suitable for automotive applications?

CRS04(TE85L) is not qualified for automotive applications per AEC-Q101. Toshiba explicitly restricts its use in "equipment used for automobiles" under its Restrictions on Product Use notice. While its -55°C to +150°C T_j range overlaps with automotive ambient requirements, CRS04(TE85L) lacks automotive-grade screening, failure rate data, and qualification testing. For automotive designs, engineers must select AEC-Q101-certified alternatives - CRS04(TE85L) is intended solely for commercial portable electronics.

What is the reverse leakage current of CRS04(TE85L) at full rated voltage?

At V_RRM = 40 V and T_a = 25°C, the maximum repetitive peak reverse current (I_RRM) for CRS04(TE85L) is 100 µA. This value increases with junction temperature - typical I_R rises to ~1 mA at T_j = 125°C per the datasheet's I_R–T_j curve. Designers must verify that this leakage remains within acceptable limits for high-impedance feedback networks or battery drain budgets, especially in always-on portable systems using CRS04(TE85L).

CRS04(TE85L) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: -

Package/Case:: SOD-123F

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 510 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: S-FLAT (1.6x3.5)

Operating Temperature - Junction:: -40°C ~ 150°C

CRS04(TE85L) FAQ

1.How can I place an order for CRS04(TE85L) through Aetrix?

Please submit a Request for Quotation (RFQ) for CRS04(TE85L) 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 CRS04(TE85L) reliable?

The price and inventory of CRS04(TE85L) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CRS04(TE85L) is usually 5 days.

3.What payment methods are accepted for CRS04(TE85L)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CRS04(TE85L) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CRS04(TE85L)?

CRS04(TE85L) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CRS04(TE85L) 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 CRS04(TE85L)?

For technical support, including CRS04(TE85L) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CRS04(TE85L) requirements.

6.How does Aetrix verify that CRS04(TE85L) is sourced from the original manufacturer or authorized distributors?

All CRS04(TE85L) 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 CRS04(TE85L) meets industry standards.

7.What is the process for return or replacement of CRS04(TE85L)?

All CRS04(TE85L) units undergo pre-shipment inspection (PSI). If there is an issue with CRS04(TE85L), 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 CRS04(TE85L) part is unused and in its original packaging.

Return procedure for CRS04(TE85L):

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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