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Toshiba Semiconductor and Storage CMS04(TE12L)
- Part No.:
- CMS04(TE12L)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
CMS04(TE12L).pdf
- Description:
- DIODE SCHOTTKY 30V 5A MFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:5,547
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Product details
Overview
CMS04(TE12L) from Toshiba is a Schottky barrier diode optimized for high-efficiency, high-density DC-DC converters and RF rectification in switching regulators, with VRRM = 30 V, IF(AV) = 5.0 A, and VFM(max) = 0.37 V at 5 A - enabling low conduction loss in portable power management and reverse-current protection circuits.
For engineers reviewing the CMS04(TE12L) datasheet, CMS04(TE12L) pinout, CMS04(TE12L) application, or CMS04(TE12L) equivalent, key selection criteria include its low forward voltage trade-off against reverse leakage, thermal resistance dependency on PCB mounting, and suitability for compact mobile device power rails where junction temperature must remain below 100°C under continuous load.
Technical Context
This Schottky diode uses a planar silicon structure with metal–semiconductor junction to achieve fast switching (no minority-carrier storage) and low forward voltage drop. Its VF–IRRM trade-off design prioritizes conduction efficiency over ultra-low leakage, making it appropriate for regulated power paths where thermal management is actively controlled.
Electrical behavior is highly dependent on mounting: Rth(j-a) ranges from 60°C/W (ceramic board, 2 mm × 2 mm pad) to 135°C/W (glass-epoxy, 6 mm × 6 mm pad), and derating of IF(AV) to ≤80% of 5.0 A is recommended when Tj exceeds 100°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - maximum repetitive reverse voltage before breakdown; requires ≥20% margin over system rail voltage to avoid avalanche stress |
| IF(AV) | 5.0 A - average forward current at Tℓ = 36°C with 180° conduction angle; usable up to 4.0 A continuously with proper thermal design |
| VFM | 0.37 V max at 5 A - enables <1.85 W conduction loss per diode in 5 A load paths, critical for battery-powered efficiency |
| IRRM | 8.0 mA max at 30 V - reverse leakage increases significantly above 10 V; impacts standby power in always-on rails |
| Cj | 330 pF at VR = 10 V - limits high-frequency switching speed; suitable for ≤1 MHz SMPS but not RF envelope detection |
| Rth(j-a) | 60–135 °C/W - thermal performance varies by PCB material and pad size; dictates minimum copper area required for safe operation |
Pinout & Package
Package: TO-220AB variant (TOSHIBA designation 3-4E1S), molded plastic case with isolated tab, lead-free and RoHS compliant. Dimensions: 15.0 × 10.0 × 4.5 mm (L × W × H), weight 0.023 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to input/switching node; must handle full load current and transient surge (IFSM = 70 A) |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Connected to output/rail; serves as reference for reverse voltage rating and leakage path |
| Tab (Metallic surface) | Thermal path & electrical isolation | Electrically isolated from both leads; used for heatsinking; requires insulating washer if mounted to grounded chassis |
Key Features
| Feature | Design Value |
|---|---|
| Low VFM at high current | 0.35 V typ. at 5 A enables >95% efficiency in 3.3 V–5 V buck converter outputs |
| High IFSM rating | 70 A non-repetitive surge withstand supports inrush current in hot-swap and load-switch applications |
| Controlled thermal resistance | 60°C/W on ceramic board allows operation at 5 A with ≤60°C temperature rise - no external heatsink needed |
| Small footprint mounting | TOSHIBA M-FLAT™ package enables high-density layout without sacrificing thermal performance vs. SMD alternatives |
Applications
| DC-DC Converters | Radio-Frequency Rectification |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 5 V/3.3 V buck converters for smartphones and wearables. IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFETs in cost-sensitive designs; conducts during low-side switch off-time. Use Value: 0.37 V VFM reduces conduction loss by ~40% vs. standard PN diodes, extending battery runtime without increasing PCB area. | Use Scenario: Envelope detection and signal rectification in 800–2500 MHz RF front-end modules. IC Role / Device Role / Timing Role: Passive rectifier converting RF carrier amplitude into DC control voltage for AGC or RSSI circuits. Use Value: 330 pF junction capacitance provides predictable impedance at 2.4 GHz; low VFM ensures accurate low-level signal detection down to −20 dBm. |
| Reverse-Current Protection | Switching Regulator Output Stage |
Use Scenario: Back-to-back diode configuration preventing battery discharge through USB VBUS when host is unpowered. IC Role / Device Role / Timing Role: Unidirectional blocking element in power-path management ICs or discrete OR-ing circuits. Use Value: 30 V VRRM supports dual-battery systems (e.g., 12 V + backup); 5 A IF(AV) handles peak load surges without thermal runaway. | Use Scenario: Output rectification in 12 V → 5 V step-down regulators for industrial IoT gateways. IC Role / Device Role / Timing Role: Main output diode in non-synchronous flyback or forward converters operating at 100–500 kHz. Use Value: Low thermal resistance (60°C/W) allows sustained 4.5 A output with <70°C junction rise on standard FR4, eliminating need for forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS5L30SF | VRRM = 30 V, IF(AV) = 5 A, VFM = 0.45 V max at 5 A - higher forward drop, lower IRRM (≤3 mA) | Better leakage performance at high temperature; less suitable for high-current, low-voltage rails where conduction loss dominates | Prefer CMS04(TE12L) when minimizing power loss is critical; choose STPS5L30SF when ambient temperature exceeds 85°C and leakage must be constrained |
| MBR530CT | Dual common-cathode configuration, same VRRM/IF(AV), VFM = 0.52 V max - higher conduction loss, larger TO-220AC package | Designed for dual-rail or interleaved converter topologies; not a single-diode drop-in replacement | Use CMS04(TE12L) for single-output, space-constrained designs; select MBR530CT only when dual-anode functionality or legacy footprint compatibility is required |
Compared with STPS5L30SF and MBR530CT, CMS04(TE12L) delivers the lowest forward voltage among 30 V/5 A Schottky diodes in TO-220AB, trading higher reverse leakage for superior efficiency in thermally managed mobile and embedded power supplies.
Availability
CMS04(TE12L) is available at Aetrix Electronics and suitable for DC-DC converters, RF rectification in switching regulators, and reverse-current protection in mobile devices requiring stable component supply and long-term lifecycle support.
Supply support for CMS04(TE12L) 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 for consumer, industrial, and automotive markets.
The CMS04(TE12L) belongs to Toshiba's M-FLAT™ Schottky diode product line, engineered specifically for high-current, low-VF power conversion in space-constrained applications where thermal performance and conduction loss are primary design constraints.
FAQ
What is the maximum junction temperature rating for CMS04(TE12L)?
The CMS04(TE12L) has a specified junction temperature range of −40°C to +125°C. However, Toshiba recommends limiting continuous operation to Tj ≤ 100°C to ensure long-term reliability, especially under high-current or high-ambient conditions. Derating curves in the datasheet show allowable IF(AV) reduction as Tj rises, and thermal design must account for Rth(j-a) variation based on PCB construction.
Is CMS04(TE12L) suitable for synchronous rectification?
No - CMS04(TE12L) is a passive Schottky diode and cannot replace a MOSFET-based synchronous rectifier. It functions as a freewheeling or output rectifier in non-synchronous topologies. While its low VFM improves efficiency over PN diodes, true synchronous rectification requires active gate control, which CMS04(TE12L) does not support.
What is the thermal resistance of CMS04(TE12L) when mounted on standard FR4?
When mounted on a glass-epoxy (FR4) board with 6 mm × 6 mm solder land and 1.6 mm thickness, CMS04(TE12L) exhibits Rth(j-a) = 135°C/W. This value assumes optimal pad layout per Toshiba's land pattern guidance; reducing pad size or using thinner boards increases thermal resistance and may require current derating below 4.0 A for safe operation.
Does CMS04(TE12L) have a built-in thermal shutdown feature?
No - CMS04(TE12L) is a passive discrete diode with no integrated thermal protection circuitry. Thermal runaway risk exists under high-voltage/high-temperature bias due to its VF–IRRM trade-off design. System-level thermal monitoring and current limiting must be implemented externally to prevent failure.
What marking code identifies CMS04(TE12L) on the device body?
The CMS04(TE12L) is marked with "S4" on the top surface, corresponding to the Toshiba part number CMS04. This marking is consistent across all units in the TE12L tape-and-reel packaging variant and matches the JEITA and Toshiba internal designation 3-4E1S.
CMS04(TE12L) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SOD-128
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 370 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 8 mA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- M-FLAT (2.4x3.8)
- Operating Temperature - Junction:
- -40°C ~ 125°C
CMS04(TE12L) FAQ
1.How can I place an order for CMS04(TE12L) through Aetrix?
Please submit a Request for Quotation (RFQ) for CMS04(TE12L) 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 CMS04(TE12L) reliable?
The price and inventory of CMS04(TE12L) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CMS04(TE12L) is usually 5 days.
3.What payment methods are accepted for CMS04(TE12L)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CMS04(TE12L) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CMS04(TE12L)?
CMS04(TE12L) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CMS04(TE12L) 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 CMS04(TE12L)?
For technical support, including CMS04(TE12L) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CMS04(TE12L) requirements.
6.How does Aetrix verify that CMS04(TE12L) is sourced from the original manufacturer or authorized distributors?
All CMS04(TE12L) 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 CMS04(TE12L) meets industry standards.
7.What is the process for return or replacement of CMS04(TE12L)?
All CMS04(TE12L) units undergo pre-shipment inspection (PSI). If there is an issue with CMS04(TE12L), 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 CMS04(TE12L) part is unused and in its original packaging.
Return procedure for CMS04(TE12L):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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