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Diodes Incorporated BAT42W-7
- Part No.:
- BAT42W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAT42W-7.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,795
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Product details
Overview
BAT42W-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOD-123 package, designed for low-loss rectification and high-speed switching in space-constrained DC/DC converters and signal demodulation circuits. It delivers 30 V peak repetitive reverse voltage, 200 mA forward continuous current, and 0.26 V forward voltage drop at 200 mA - enabling efficient operation in battery-powered RF receivers and USB power-path protection.
For engineers reviewing the BAT42W-7 datasheet, BAT42W-7 pinout, BAT42W-7 application, or BAT42W-7 equivalent, key selection criteria include its 5.0 ns reverse recovery time, 10 pF junction capacitance at 1 V, thermal resistance of 500 °C/W on FR-4, cathode-band polarity marking, and RoHS-compliant matte tin plating over Alloy 42 leadframe.
Technical Context
This Schottky diode uses a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve fast switching and minimal forward conduction loss. Its 30 V VRRM rating targets low-voltage rail clamping and reverse-polarity protection in 3.3 V/5 V systems, while the 5.0 ns trr supports >100 MHz RF envelope detection.
The device operates across –55 °C to +125 °C with no derating up to 75 °C ambient; above that, forward current linearly derates to zero at 125 °C per Fig. 1. Thermal performance assumes use of Diodes Inc.'s recommended SOD-123 pad layout per AP02001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - maximum repetitive reverse voltage before breakdown; sets upper limit for clamp or flyback applications |
| VFM @ 200 mA | 0.26 V - low conduction loss enables >95% efficiency in 3.3 V synchronous rectifier paths |
| trr | 5.0 ns - supports high-frequency switching in RF detector and sample-and-hold circuits |
| CT @ 1 V | 10 pF - minimizes signal distortion in 45 MHz AM demodulation (tested per Fig. 4) |
| RJA | 500 °C/W - requires minimum copper area per AP02001 to avoid thermal runaway at full IFM |
| IFSM | 4.0 A - handles short-duration inrush during hot-plug events in USB Type-A ports |
Pinout & Package
SOD-123 surface-mount package: 3.55–3.85 mm length (A), 2.55–2.85 mm width (B), 1.40–1.70 mm height (C); cathode marked by band on end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., ground side of inductor in buck sync rectifier) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to higher-potential rail (e.g., output of boost converter) |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.26 V @ 200 mA reduces power loss by >40% vs. standard silicon diodes in 3.3 V rails |
| Fast switching | 5.0 ns reverse recovery enables clean pulse shaping in 100 MHz clock recovery loops |
| RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe ensures solderability and eliminates lead-based contamination risk |
| Moisture sensitivity | Level 1 per J-STD-020C - no bake required before reflow, simplifying SMT line handling |
Applications
| USB Power Path Protection | RF Signal Demodulation |
|---|---|
Use Scenario: Preventing backfeed from downstream USB peripherals into host VBUS during disconnect events. IC Role / Device Role / Timing Role: Reverse-polarity blocking diode in power OR-ing configuration. Use Value: 0.26 V VF minimizes voltage drop across VBUS path, preserving 5.0 V ±5% compliance under 200 mA load. | Use Scenario: Envelope detection of 45 MHz AM signals in portable radio front-ends. IC Role / Device Role / Timing Role: High-speed signal rectifier with minimal junction capacitance. Use Value: 10 pF CT at 1 V and 5.0 ns trr maintain >80% rectification efficiency per Fig. 5 test conditions. |
| DC/DC Converter Synchronous Rectifier | Low-Voltage Rail Clamp |
Use Scenario: Replacing MOSFET gate drivers in ultra-low-power buck converters for wearables. IC Role / Device Role / Timing Role: Passive synchronous rectifier in discontinuous conduction mode (DCM). Use Value: 30 V VRRM safely handles inductive kickback from 12 V input; 500 mW Pd sustains 200 mA at 75 °C ambient. | Use Scenario: Clamping transient spikes on 3.3 V I²C bus lines exposed to ESD events. IC Role / Device Role / Timing Role: Low-capacitance shunt diode limiting voltage excursion. Use Value: 10 pF CT avoids signal rise-time degradation; 30 V VRRM exceeds I²C bus overshoot limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | Higher VF (0.33 V @ 100 mA), same SOD-123, 30 V VRRM | Less suitable for <100 mV dropout-critical paths | Prefer when cost sensitivity outweighs 70 mV VF penalty |
| 1N5711 | Through-hole DO-35, 70 V VRRM, 0.45 V VF @ 10 mA | Not SMT-compatible; used in legacy prototyping or high-voltage analog | Select only if board redesign for SMT is not feasible |
Compared with SBAT54LT1G and 1N5711, BAT42W-7 offers the lowest forward voltage in SOD-123 footprint, making it optimal for compact, high-efficiency 3.3 V/5 V power management where thermal budget and board area are constrained.
Availability
BAT42W-7 is available at Aetrix Electronics and suitable for USB power-path protection, RF demodulation, and low-voltage rail clamp applications requiring stable component supply and consistent parametric performance across production lots.
Supply support for BAT42W-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 U.S.
The BAT42W-7 belongs to Diodes' general-purpose Schottky diode product line, engineered specifically for high-frequency, low-loss rectification in consumer and computing power supplies.
FAQ
What is the maximum junction temperature for BAT42W-7?
The absolute maximum junction temperature is +125 °C, matching its storage temperature limit. Operation at this temperature requires strict adherence to the derating curve in Fig. 1: forward current must be reduced to zero at 125 °C ambient when mounted on FR-4 with the recommended pad layout per AP02001.
Is BAT42W-7 compatible with lead-free reflow processes?
Yes - BAT42W-7 is RoHS-compliant with matte tin plating over Alloy 42 leadframe and rated for standard Pb-free reflow profiles (peak 260 °C). Its moisture sensitivity level is Level 1 per J-STD-020C, eliminating pre-bake requirements before assembly.
How does the 10 pF junction capacitance affect RF performance?
At 1 V reverse bias and 1 MHz, the 10 pF CT enables clean 45 MHz AM demodulation (per Fig. 4 and rectification efficiency test), minimizing harmonic distortion and preserving signal integrity in receiver front-ends without requiring external compensation.
Can BAT42W-7 replace BAT43W in existing designs?
Yes, with verification - BAT42W has lower VF (0.26 V vs. 0.33 V at 200 mA) and identical VRRM, trr, and package. However, BAT43W's higher VF improves thermal stability under surge conditions; confirm system-level thermal margin if substituting in high-IFSM applications.
BAT42W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAT42W-7 FAQ
1.How can I place an order for BAT42W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT42W-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 BAT42W-7 reliable?
The price and inventory of BAT42W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT42W-7 is usually 5 days.
3.What payment methods are accepted for BAT42W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT42W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT42W-7?
BAT42W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT42W-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 BAT42W-7?
For technical support, including BAT42W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT42W-7 requirements.
6.How does Aetrix verify that BAT42W-7 is sourced from the original manufacturer or authorized distributors?
All BAT42W-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 BAT42W-7 meets industry standards.
7.What is the process for return or replacement of BAT42W-7?
All BAT42W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAT42W-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 BAT42W-7 part is unused and in its original packaging.
Return procedure for BAT42W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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