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Nexperia USA Inc. BAT54S-QR
- Part No.:
- BAT54S-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54S-QR.pdf
- Description:
- DIODE ARR SCHOTTKY 30V TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:24,865
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Product details
Overview
BAT54S-QR from Nexperia is a dual common-cathode Schottky barrier diode in SOT23 package, featuring 30 V reverse voltage rating, 800 mV forward voltage at 100 mA, 2 µA reverse leakage at 25 V, 10 pF capacitance at 1 V, and 5 ns reverse recovery time-designed for ultra-high-speed switching and reverse polarity protection in automotive power rails.
For engineers reviewing the BAT54S-QR datasheet, BAT54S-QR pinout, BAT54S-QR application, or BAT54S-QR equivalent, key selection criteria include low VF for efficiency-sensitive 12 V/24 V automotive systems, AEC-Q101 qualification, dual-diode configuration with shared cathode, and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The BAT54S-QR integrates two independent Schottky diodes sharing a common cathode (Pin 2), enabling compact dual-function implementation in clamping and steering circuits. Its planar structure with guard ring enhances ESD robustness and thermal stability under repetitive pulsed stress.
Designed for automotive-grade reliability, it operates across −55 °C to +150 °C ambient, supports 600 mA non-repetitive peak forward current, and exhibits minimal temperature-dependent VF drift-critical for consistent performance in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V - defines maximum blocking capability in 24 V automotive systems without breakdown |
| Forward Voltage (VF) | 800 mV @ 100 mA - enables low-loss rectification and clamping in battery-supplied circuits |
| Reverse Leakage (IR) | 2 µA @ 25 V - ensures minimal standby current in always-on vehicle modules |
| Diode Capacitance (Cd) | 10 pF @ 1 V - supports >100 MHz signal integrity in high-speed line termination |
| Reverse Recovery Time (trr) | 5 ns - allows clean switching in PWM-driven loads and data-line protection |
| Junction Temperature (Tj) | 150 °C - sustains operation in under-hood environments with localized heating |
| Thermal Resistance (Rth(j-a)) | 500 K/W - requires minimal copper pour for thermal management on FR4 PCBs |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount plastic package, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (Diode 1) | Input terminal for first Schottky diode; connects to protected signal or supply rail |
| 2 | Cathode (Diode 2) / Common Cathode | Shared cathode node for both diodes; ties to ground or reference potential |
| 3 | Cathode (Diode 1) / Anode (Diode 2) | Multi-functional terminal: cathode of D1 and anode of D2-enables dual-path routing |
Key Features
| Feature | Design Value |
|---|---|
| Low Forward Voltage | 800 mV max at 100 mA reduces conduction loss by >40% vs. standard silicon diodes |
| AEC-Q101 Qualified | Stress-tested per automotive discrete semiconductor standard for vibration, temperature cycling, and HTRB |
| Guard Ring Protection | Integrated planar guard ring suppresses edge breakdown and improves surge tolerance |
| Ultra-Low Capacitance | 10 pF enables use in USB 2.0, CAN FD, and LIN bus ESD protection without signal distortion |
Applications
| Automotive Power Rail Protection | High-Speed Data Line Clamping |
|---|---|
Use Scenario: Reverse battery connection in infotainment head units and ADAS camera modules. IC Role / Device Role / Timing Role: Dual-diode configuration provides bidirectional clamping while sharing cathode to minimize board area. Use Value: Prevents >30 V transients from damaging downstream PMICs and microcontrollers without adding external TVS devices. | Use Scenario: ESD and overvoltage suppression on LIN bus lines in door control modules. IC Role / Device Role / Timing Role: Schottky pair acts as low-capacitance clamp between signal and ground, preserving 19.2 kbps timing integrity. Use Value: 5 ns trr avoids signal ringing; 10 pF Cd prevents rise-time degradation during transient events. |
| USB Port Polarity Guard | DC-DC Converter Output Snubber |
Use Scenario: Reverse polarity protection for USB Type-A receptacles in telematics gateways. IC Role / Device Role / Timing Role: Diode 1 blocks reverse current; Diode 2 routes VBUS to load when correctly polarized. Use Value: 2 µA IR at 25 V ensures <1 µW standby loss-critical for battery-backed USB host functions. | Use Scenario: Snubbing flyback spikes in 5 V/3.3 V buck converter outputs feeding MCU cores. IC Role / Device Role / Timing Role: Fast-switching Schottky pair absorbs inductive kickback across output capacitor and inductor. Use Value: 800 mV VF limits snubber conduction loss; 600 mA IFSM handles short-duration energy surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | Single diode, SOD-123 package; no common-cathode dual configuration | Requires two separate placements for dual function; larger board area | Select only if single-diode replacement suffices and layout allows discrete placement |
| Vishay VS-2EDH02HM3/85A | Higher VR = 40 V; higher VF = 950 mV; TO-236AB but different pinout (anode-anode-cathode) | Not pin-compatible; incompatible for shared-cathode topologies like BAT54S-QR | Use only in new designs where cathode-common topology is not required |
Compared with NSR0230HT1G and VS-2EDH02HM3/85A, BAT54S-QR uniquely delivers dual Schottky functionality in a single SOT23 footprint with verified AEC-Q101 compliance-making it the only drop-in solution for space-constrained automotive clamping and polarity protection where common-cathode routing is essential.
Availability
BAT54S-QR is available at Aetrix Electronics and suitable for automotive power rail protection, high-speed data line clamping, and DC-DC converter snubbing requiring stable component supply and long-term lifecycle assurance.
Supply support for BAT54S-QR 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BAT54S-QR belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for robust, low-loss protection in automotive electrical systems operating up to 150 °C junction temperature.
FAQ
What is the pin configuration of BAT54S-QR and how does it differ from BAT54C?
BAT54S-QR uses Pin 1 = A1, Pin 2 = K2 (common cathode), Pin 3 = K1/A2-enabling dual-diode operation with shared cathode. BAT54C has Pin 1 = A1, Pin 2 = K1, Pin 3 = A2 (common anode), making them electrically complementary but not interchangeable without circuit redesign.
Is BAT54S-QR suitable for 48 V mild-hybrid automotive systems?
No-BAT54S-QR is rated for 30 V reverse voltage and is intended for 12 V/24 V systems. For 48 V architectures, Nexperia recommends BAT54SW-Q or PMEG3010CEH, both rated ≥40 V VR and qualified to AEC-Q101.
Does BAT54S-QR require derating at elevated ambient temperatures?
Yes-forward current must be reduced above 25 °C ambient. At 85 °C, IF is limited to ~120 mA; at 125 °C, to ~70 mA, per the derating curve in Figure 1 of the datasheet. Thermal design must account for Rth(j-a) = 500 K/W on standard FR4.
Can BAT54S-QR replace BAT54A in existing designs?
No-BAT54A is a single diode in SOT23. BAT54S-QR contains two diodes with shared cathode. Substitution would require verifying whether the second diode path is unused or redundant; otherwise, unintended conduction paths may occur.
BAT54S-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 800 mV @ 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:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BAT54S-QR FAQ
1.How can I place an order for BAT54S-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54S-QR 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 BAT54S-QR reliable?
The price and inventory of BAT54S-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54S-QR is usually 5 days.
3.What payment methods are accepted for BAT54S-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54S-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54S-QR?
BAT54S-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54S-QR 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 BAT54S-QR?
For technical support, including BAT54S-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54S-QR requirements.
6.How does Aetrix verify that BAT54S-QR is sourced from the original manufacturer or authorized distributors?
All BAT54S-QR 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 BAT54S-QR meets industry standards.
7.What is the process for return or replacement of BAT54S-QR?
All BAT54S-QR units undergo pre-shipment inspection (PSI). If there is an issue with BAT54S-QR, 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 BAT54S-QR part is unused and in its original packaging.
Return procedure for BAT54S-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54S-QR Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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