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Diodes Incorporated BAT54CW-7
- Part No.:
- BAT54CW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54CW-7.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,457
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Product details
Overview
BAT54CW-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT323 package, rated for 30 V peak reverse voltage, 200 mA continuous forward current, and 320 mV max forward voltage at 1 mA. It serves as a freewheeling or blocking diode in compact DC-DC converters and reverse polarity protection circuits.
For engineers reviewing the BAT54CW-7 datasheet, BAT54CW-7 pinout, BAT54CW-7 application, or BAT54CW-7 equivalent, key selection criteria include low VF for efficiency-critical 3.3 V/5 V rail clamping, fast 5 ns reverse recovery for high-frequency switching nodes, and SOT323 footprint compatibility with space-constrained PCB layouts.
Technical Context
This Schottky diode uses a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve low forward voltage and fast switching. Its 5 ns reverse recovery time enables use in >1 MHz DC-DC topologies without significant switching loss penalties.
The device incorporates a PN junction guard ring to suppress transient-induced avalanche and improve ESD robustness per IEC 61000-4-2 Level 2 (±4 kV contact). Thermal resistance of 625 °C/W reflects its ultra-small SOT323 thermal mass and FR-4 pad-limited heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum allowable reverse bias before breakdown; sets upper limit for blocking in 24 V systems. |
| IF | 200 mA - Continuous forward current rating; defines steady-state power delivery capability in low-power rails. |
| VF Max | 320 mV @ 1 mA - Low conduction loss at light load; critical for standby efficiency in always-on circuits. |
| tRR | 5.0 ns - Fast recovery enables use in high-frequency synchronous rectification and snubberless flyback designs. |
| CT | 10 pF @ 1 V - Low junction capacitance minimizes AC coupling and ringing in high-speed signal path clamping. |
| IR Max | 2.0 µA @ 25 V - Low leakage preserves battery life in reverse-polarity protection for portable devices. |
| RθJA | 625 °C/W - High thermal resistance necessitates conservative derating above 50 °C ambient in sealed enclosures. |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount package (2.0 × 2.2 mm footprint, 0.9 mm height), optimized for high-density PCB assembly and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to positive side of source; must be routed with minimal inductance in high-di/dt freewheeling paths. |
| Cathode (Pin 2) | Forward current exit / reverse blocking node | Connected to switching node or ground return; polarity marking on top surface aligns with cathode band. |
| Collector / Heat Sink (Pin 3) | Thermal and electrical common | Internally tied to cathode; provides primary thermal path to PCB copper; requires adequate thermal pad area per Diodes' layout guide. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 320 mV max at 1 mA enables >95% efficiency in 3.3 V buck converter output stage under light load. |
| Fast switching speed | 5 ns reverse recovery supports operation up to 5 MHz in resonant LLC auxiliary supplies without added snubbers. |
| PN junction guard ring | Suppresses edge avalanche during ESD transients, achieving ±4 kV contact discharge robustness without external TVS. |
| Ultra-small SOT323 package | 0.006 g weight and 2.0 × 2.2 mm footprint reduce board area by 60% vs. SOT23 in wearable power management modules. |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity level 1 for standard reflow processes. |
Applications
| DC-DC Converter Freewheeling | Reverse Polarity Protection |
|---|---|
Use Scenario: Used as secondary-side freewheeling diode in non-synchronous 5 V → 3.3 V buck converter operating at 2 MHz. IC Role / Device Role: Provides low-loss current path during high-side MOSFET off-time; conducts inductor current until next cycle. Use Value: 320 mV VF reduces conduction loss by 40% vs. standard silicon diode, improving light-load efficiency by 3.2 percentage points. | Use Scenario: Placed in series with VIN rail of USB-powered IoT sensor node to prevent damage from reversed connector insertion. IC Role / Device Role: Blocks reverse current flow when input polarity is inverted; remains non-conductive below -30 V. Use Value: 2 µA leakage at 25 V reverse bias ensures <1 µA standby drain, extending coin-cell battery life beyond 12 months. |
| Blocking Diode in PMIC | ESD-Sensitive Signal Clamping |
Use Scenario: Isolates backup battery (CR2032) from main Li-ion supply in automotive infotainment power manager. IC Role / Device Role: Prevents backfeed from main rail into backup circuit; blocks reverse current during main supply dropout. Use Value: 30 V VRRM accommodates 24 V automotive transients while maintaining 200 mA hold-up current for RTC retention. | Use Scenario: Clamps I²C bus lines (SDA/SCL) to 3.3 V rail in industrial PLC module exposed to 8 kV ESD events. IC Role / Device Role: Shunts ESD current to VCC during positive transients; leverages guard ring for controlled snapback behavior. Use Value: 5 ns tRR and 10 pF CT avoid signal distortion on 400 kHz I²C clock edges during clamping events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54CW-TB | Same SOT323 package, identical VRRM/IF, but 400 mV VF max @ 1 mA (vs. 320 mV). | Higher conduction loss reduces light-load efficiency in battery-powered sensors. | Select when cost priority outweighs 0.8% efficiency gain at 1 mA load. |
| NSR0230HT1G | 0.2 A rating, 30 V VRRM, but SOD-523 package (smaller); 370 mV VF max @ 1 mA. | SOD-523 footprint incompatible with SOT323 land pattern; requires PCB redesign. | Choose only if board space is constrained below 1.6 × 1.6 mm and rework is acceptable. |
Compared with SBAT54CW-TB and NSR0230HT1G, BAT54CW-7 delivers the lowest forward voltage in a standard SOT323 footprint, making it optimal for efficiency-sensitive, drop-in-replacement scenarios where board real estate and thermal performance are balanced constraints.
Availability
BAT54CW-7 is available at Aetrix Electronics and suitable for DC-DC converters, reverse polarity protection circuits, and freewheeling diode applications requiring stable component supply across automotive infotainment, industrial sensor nodes, and portable medical devices.
Supply support for BAT54CW-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.
The BAT54 family belongs to Diodes' high-efficiency Schottky diode product line, engineered specifically for low-voltage, high-frequency power management in space-constrained consumer, computing, and industrial systems.
FAQ
What is the maximum junction temperature for BAT54CW-7?
The absolute maximum junction temperature is +125 °C, consistent with its operating temperature range specification. Derating begins at +50 °C ambient due to its 625 °C/W thermal resistance; at 75 °C ambient, maximum continuous IF drops to 120 mA to maintain TJ ≤ 125 °C.
Is BAT54CW-7 suitable for automotive applications?
The standard BAT54CW-7 is not AEC-Q200 qualified. For automotive use, Diodes offers the pin- and package-compatible BAT54CWQ variant, which undergoes extended temperature cycling, humidity testing, and failure analysis per AEC-Q200 Rev D requirements.
How does the PN junction guard ring improve reliability?
The integrated guard ring prevents premature edge breakdown during voltage transients by distributing electric field stress away from the active junction periphery. This raises ESD withstand voltage to ±4 kV contact (IEC 61000-4-2) and improves long-term stability under repetitive surge conditions.
Can BAT54CW-7 replace BAT54W-7 in existing designs?
Yes - BAT54CW-7 and BAT54W-7 share identical SOT323 package, pinout, and electrical specifications (VRRM, IF, VF, tRR). The "C" suffix denotes cathode-band marking orientation per Diodes' internal coding; no functional or layout changes are required for substitution.
BAT54CW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 200mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25 V
- Operating Temperature - Junction:
- -65°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAT54CW-7 FAQ
1.How can I place an order for BAT54CW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54CW-7 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 BAT54CW-7 reliable?
The price and inventory of BAT54CW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54CW-7 is usually 5 days.
3.What payment methods are accepted for BAT54CW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54CW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54CW-7?
BAT54CW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54CW-7 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 BAT54CW-7?
For technical support, including BAT54CW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54CW-7 requirements.
6.How does Aetrix verify that BAT54CW-7 is sourced from the original manufacturer or authorized distributors?
All BAT54CW-7 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 BAT54CW-7 meets industry standards.
7.What is the process for return or replacement of BAT54CW-7?
All BAT54CW-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAT54CW-7, 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 BAT54CW-7 part is unused and in its original packaging.
Return procedure for BAT54CW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54CW-7 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
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BAV99WT1G
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