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Diodes Incorporated BAT54SW-7
- Part No.:
- BAT54SW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54SW-7.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,071
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Product details
Overview
BAT54SW-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 DC-DC converters and reverse polarity protection circuits.
For engineers reviewing the BAT54SW-7 datasheet, BAT54SW-7 pinout, BAT54SW-7 application, or BAT54SW-7 equivalent, key selection criteria include low VF (≤320 mV @ 1 mA), fast recovery (tRR ≤ 5.0 ns), ultra-small SOT323 footprint, and 2 µA max reverse leakage at 25 V - critical for high-efficiency, space-constrained power management designs.
Technical Context
This Schottky diode uses a planar epitaxial construction with a PN junction guard ring to suppress transient-induced failure and improve ESD robustness. Its low barrier height enables sub-320 mV forward drop at 1 mA while maintaining 30 V reverse blocking capability.
The device operates across –65 °C to +125 °C and exhibits 10 pF capacitance at 1 V reverse bias and 1 MHz, supporting high-frequency switching in SMPS and synchronous rectifier auxiliary paths without excessive capacitive loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input rails up to 24 V nominal with safety margin for transients in industrial DC-DC stages |
| IF | 200 mA continuous - suitable for low-power auxiliary bias rails and signal-level clamping |
| VF Max | 320 mV @ 1 mA - minimizes conduction loss in low-current freewheeling paths |
| IR Max | 2.0 µA @ 25 V - ensures negligible leakage in battery-backed or always-on reverse-blocking applications |
| tRR | 5.0 ns - enables operation in switching frequencies above 10 MHz without significant recovery loss |
| CT | 10 pF @ 1 V, 1 MHz - limits capacitive feedthrough in high-speed signal routing and level-shifting interfaces |
| RθJA | 625 °C/W - requires minimal PCB copper area for thermal relief in low-power layouts |
Pinout & Package
Package: SOT323 - ultra-compact 3-terminal surface-mount plastic package (2.0 × 2.2 mm footprint, 0.9 mm height), lead-free, RoHS- and "Green"-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to lower-potential node in reverse polarity protection or cathode-side switching path |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail; blocks reverse current when biased negatively relative to anode |
| NC / Heat Sink Pad (Pin 3) | No internal connection | Exposed leadframe pad (Pin 3) is electrically isolated - used solely for mechanical anchoring and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 320 mV max @ 1 mA - reduces power loss by >40% vs. standard silicon diodes in low-IF bias networks |
| Fast switching speed | 5.0 ns reverse recovery - avoids cross-conduction in synchronous buck topologies with gate-drive timing margins <10 ns |
| PN junction guard ring | Integrated transient suppression structure - improves system-level ESD immunity per IEC 61000-4-2 Level 4 (±8 kV contact) |
| Ultra-small SOT323 package | 2.0 × 2.2 mm outline - enables placement adjacent to ICs in dense power management subsystems without compromising layout clearance |
Applications
| DC-DC Converter Freewheeling | Reverse Polarity Protection |
|---|---|
Use Scenario: Used as the catch diode in non-synchronous buck regulators powering microcontroller I/O rails. IC Role / Device Role: Provides low-loss current recirculation path during high-side switch off-time. Use Value: 320 mV VF at 1 mA reduces standby power loss by 0.32 mW per diode versus 600 mV alternatives - critical for battery life in always-on sensors. | Use Scenario: Placed in series with VIN to prevent damage from accidental reversed input connection in portable instrumentation. IC Role / Device Role: Blocks reverse current flow while introducing minimal forward drop in normal operation. Use Value: 2 µA IR at 25 V ensures <1 nA leakage into protected circuitry - preserves sleep-mode current budgets below 100 nA. |
| Blocking Diode in Dual-Rail Systems | ESD-Sensitive Signal Clamping |
Use Scenario: Isolates backup battery from main supply in RTC power domains to prevent backfeed. IC Role / Device Role: Unidirectional current gate between two independent voltage sources. Use Value: 30 V VRRM accommodates Li-ion (4.2 V) + supercapacitor (2.7 V) combinations with headroom for surge events. | Use Scenario: Connected anode-to-ground, cathode-to-signal line to clamp ESD transients on USB D+/D− lines. IC Role / Device Role: Low-capacitance (<10 pF), fast-turn-on path to shunt HBM pulses. Use Value: 5 ns tRR and guard ring structure enable clamping response within first 10 ns of 8-kV contact discharge - meets USB 2.0 ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54SWT-7 | Same electrical specs; identical SOT323 package; optimized for automotive AEC-Q101 qualification | Required for automotive infotainment power rails where temperature cycling and vibration compliance are mandated | Select when full AEC-Q101 documentation and PPAP support are contractually required |
| NSR0230HT1G | Lower VF (270 mV @ 1 mA) but higher IR (5 µA @ 25 V); same SOT-23 package (slightly larger than SOT323) | Better efficiency in low-IF bias networks but less suitable for ultra-low-leakage battery backup | Prefer when forward loss dominates design margin and board space allows SOT-23 footprint |
Compared with SBAT54SWT-7, BAT54SW-7 lacks automotive qualification but offers identical performance at lower cost for industrial and consumer use; versus NSR0230HT1G, it trades 50 mV higher VF for 2.5× lower leakage - favoring battery-sensitive applications over marginal efficiency gains.
Availability
BAT54SW-7 is available at Aetrix Electronics and suitable for DC-DC converters, reverse polarity protection circuits, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BAT54SW-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BAT54 family belongs to Diodes' high-reliability Schottky diode product line, engineered specifically for low-voltage, high-speed power management in space-constrained portable and industrial electronics.
FAQ
What is the maximum junction temperature for BAT54SW-7?
The BAT54SW-7 has an operating junction temperature range of –65 °C to +125 °C. Its thermal resistance is 625 °C/W (junction-to-ambient, mounted on FR-4 with recommended pad layout), meaning it can safely dissipate 200 mW at ambient temperatures up to +85 °C before reaching the 125 °C limit.
Is BAT54SW-7 pin-compatible with BAT54W-7 or BAT54CW-7?
Yes - all BAT54x variants (W, AW, CW, SW) share identical SOT323 packaging, pinout, and mechanical dimensions. The suffix denotes cathode marking configuration only: BAT54SW-7 uses a single bar marking on the cathode side, while BAT54W-7 uses no bar and BAT54CW-7 uses two bars.
Does BAT54SW-7 meet automotive qualification standards?
No - BAT54SW-7 is not AEC-Q101 qualified. For automotive applications, Diodes offers the functionally identical SBAT54SWT-7 variant, which undergoes full AEC-Q101 stress testing and includes PPAP documentation and extended temperature screening.
Can BAT54SW-7 be used in place of a 1N5711?
Yes, with caveats: both are Schottky diodes rated for ~30 V and low VF, but BAT54SW-7 (SOT323, 320 mV @ 1 mA) is surface-mount and smaller than through-hole 1N5711 (DO-35, ~450 mV @ 1 mA). Substitution requires PCB redesign and verification of thermal derating under actual load conditions.
BAT54SW-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 Series Connection
- 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
BAT54SW-7 FAQ
1.How can I place an order for BAT54SW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54SW-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 BAT54SW-7 reliable?
The price and inventory of BAT54SW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54SW-7 is usually 5 days.
3.What payment methods are accepted for BAT54SW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54SW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54SW-7?
BAT54SW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54SW-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 BAT54SW-7?
For technical support, including BAT54SW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54SW-7 requirements.
6.How does Aetrix verify that BAT54SW-7 is sourced from the original manufacturer or authorized distributors?
All BAT54SW-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 BAT54SW-7 meets industry standards.
7.What is the process for return or replacement of BAT54SW-7?
All BAT54SW-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAT54SW-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 BAT54SW-7 part is unused and in its original packaging.
Return procedure for BAT54SW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54SW-7 Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
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BAT54S-7-F
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BAV99LT1G
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BAT54S,215
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