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Nexperia USA Inc. BAT54S,235
- Part No.:
- BAT54S,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54S,235.pdf
- Description:
- DIODE ARR SCHOTTKY 30V TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:371,565
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Product details
Overview
BAT54S,235 from Nexperia is a dual common-cathode Schottky barrier diode in SOT23 package, designed for ultra-high-speed switching and reverse polarity protection. It delivers 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 - enabling compact DC-DC converter input clamping and USB port protection circuits.
For engineers reviewing the BAT54S,235 datasheet, BAT54S,235 pinout, BAT54S,235 application, or BAT54S,235 equivalent, key selection criteria include dual-diode configuration with shared cathode, low VF for efficiency-sensitive 3.3 V/5 V rail clamping, sub-10 ns trr for >10 MHz signal line termination, and SOT23 footprint compatibility with space-constrained IoT sensor nodes and portable power management designs.
Technical Context
The BAT54S,235 integrates two independent Schottky diodes sharing a common cathode (Pin 2), forming a dual-diode structure optimized for bidirectional clamping and polarity protection. Its planar construction with guard ring enhances ESD robustness and thermal stability under repetitive pulsed stress.
It operates within −55 °C to 150 °C ambient range, supports 200 mA continuous forward current per diode, and exhibits thermally limited power dissipation (250 mW at Tamb ≤ 25 °C) due to its 500 K/W junction-to-ambient thermal resistance on standard FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V - defines maximum allowable DC or peak AC reverse bias before breakdown in clamping or protection roles. |
| Forward Voltage (VF) | 800 mV @ 100 mA - enables low-loss voltage clamping on 3.3 V logic rails without excessive power dissipation. |
| Reverse Current (IR) | 2 µA @ 25 V - ensures minimal leakage-induced battery drain in always-on reverse polarity protection circuits. |
| Diode Capacitance (Cd) | 10 pF @ 1 V - supports clean signal integrity in >100 MHz line termination applications such as USB 2.0 data lines. |
| Reverse Recovery Time (trr) | 5 ns - allows reliable operation in switching frequencies up to 200 MHz without tail current distortion. |
| Forward Current (IF) | 200 mA continuous - sustains steady-state current in power rail clamp paths without thermal derating below 85 °C. |
| Junction Temperature (Tj) | 150 °C max - permits operation in enclosed industrial enclosures with limited airflow and no active cooling. |
Pinout & Package
Encapsulated in a standard SOT23 (TO-236AB) surface-mount plastic package measuring 2.9 mm × 1.3 mm × 1.0 mm with 1.9 mm lead pitch and tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode 1 (A1) | Input node for first clamping path; connects to protected signal or supply rail requiring forward conduction. |
| 2 | Common Cathode (K2) | Shared return node for both diodes; ties to system ground or reference voltage in dual-clamp configurations. |
| 3 | Cathode of Diode 1 / Anode of Diode 2 (K1; A2) | Enables dual-diode topology: Pin 3 serves as cathode for D1 and anode for D2, supporting bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 800 mV @ 100 mA - reduces conduction loss by >30% vs. standard silicon diodes in 3.3 V rail clamping. |
| Low capacitance | 10 pF @ 1 V - preserves signal edge rate in high-speed digital interfaces like HDMI or USB 2.0 differential pairs. |
| Guard ring structure | Integrated planar guard ring - improves ruggedness against transient overvoltage and localized ESD events. |
| Dual common-cathode configuration | Pins 1–2–3 form two Schottky diodes sharing Pin 2 - simplifies PCB layout for bidirectional TVS-like clamping without external components. |
Applications
| USB Port Protection | DC-DC Converter Input Clamp |
|---|---|
|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) and VBUS from ESD and overvoltage transients during hot-plug events. IC Role / Device Role / Timing Role: Dual Schottky clamp diode providing bidirectional low-capacitance path to ground for fast transient suppression. Use Value: 10 pF capacitance avoids signal integrity degradation; 5 ns trr ensures clamping response within USB 2.0 bit period (200 ns). |
Use Scenario: Clamping input voltage spikes on buck converter ICs powered from unregulated 12 V automotive or industrial supplies. IC Role / Device Role / Timing Role: Low-VF Schottky pair limiting VIN overshoot to safe levels during load dump or inductive kickback events. Use Value: 30 V VR withstands ISO 7637-2 Pulse 5a; 800 mV VF minimizes power loss during sustained clamping at 100 mA. |
| RS-485 Line Termination | Reverse Polarity Protection |
|
Use Scenario: Terminating RS-485 differential bus lines to suppress reflections and improve noise immunity in factory automation networks. IC Role / Device Role / Timing Role: High-speed Schottky pair acting as active termination element between A/B lines and ground reference. Use Value: Sub-10 ns trr prevents pulse distortion at 10 Mbps baud rates; 2 µA IR avoids DC bias error in precision receiver inputs. |
Use Scenario: Preventing damage to 3.3 V microcontroller-based sensor modules when connected with reversed battery or power supply leads. IC Role / Device Role / Timing Role: Common-cathode dual diode placed in series with positive supply rail to block reverse current flow. Use Value: 200 mA IF rating supports typical sensor node loads; 800 mV VF adds only 2.4% drop at 300 mA, preserving brown-out margin. |
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 NSS40201MR6T1G | Same SOT23-3 package; 40 V VR; 1.25 V VF @ 100 mA; 25 pF Cd | Higher VF increases conduction loss in low-voltage rails; higher Cd limits use in >50 MHz signals | Select when higher reverse voltage margin is required and speed is secondary to cost |
| Diodes Inc. BAV99LT1G | SOT23-3; 70 V VR; 1.25 V VF @ 100 mA; 2 pF Cd; 4 ns trr | Lower capacitance benefits RF front-ends; higher VF degrades efficiency in power rail clamps | Prefer for high-frequency analog signal routing where <5 pF is mandatory and 30 V VR is sufficient |
Compared with BAT54S,235, the NSS40201MR6T1G trades lower speed for higher voltage tolerance, while the BAV99LT1G offers superior high-frequency performance but sacrifices forward efficiency - making BAT54S,235 optimal for balanced 3.3 V/5 V digital interface protection where VF, Cd, and trr must all be simultaneously minimized.
Availability
BAT54S,235 is available at Aetrix Electronics and suitable for USB port protection, DC-DC converter input clamping, and RS-485 line termination requiring stable component supply across high-mix, low-volume industrial design cycles.
Supply support for BAT54S,235 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 Schottky diodes, MOSFETs, and ESD protection solutions.
The BAT54S,235 belongs to Nexperia's general-purpose Schottky diode portfolio, engineered specifically for space-constrained, high-speed interface protection in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous forward current per diode in the BAT54S,235?
The BAT54S,235 supports 200 mA continuous forward current per diode at Tamb ≤ 25 °C, derating linearly to zero at 150 °C junction temperature. This rating assumes mounting on standard FR4 PCB with single-sided copper and tin-plated traces per Nexperia's thermal test conditions.
Can BAT54S,235 be used for bidirectional ESD protection on differential signal lines?
Yes - its dual common-cathode configuration (Pins 1–2–3) enables symmetrical clamping between either signal line and ground. With 10 pF capacitance and 5 ns trr, it meets IEC 61000-4-2 Level 4 (±15 kV air) requirements when paired with appropriate series impedance on high-speed differential pairs like USB 2.0.
Is BAT54S,235 automotive-qualified?
No - the BAT54S,235 is not automotive-qualified. Per Nexperia's 2022 revision history, this part was explicitly changed to non-automotive qualification. For automotive applications, Nexperia recommends the BAT54S-Q series, which undergoes AEC-Q101 testing and includes enhanced process controls for extended temperature and reliability validation.
How does the guard ring structure improve robustness in BAT54S,235?
The integrated planar guard ring surrounds the active Schottky junction to distribute electric field stress during overvoltage events, reducing localized avalanche and preventing premature breakdown. This design increases ESD withstand capability (HBM > 8 kV) and improves long-term reliability under repetitive transient conditions such as inductive switching noise in motor control PCBs.
BAT54S,235 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 (Max)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BAT54S,235 FAQ
1.How can I place an order for BAT54S,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54S,235 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,235 reliable?
The price and inventory of BAT54S,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54S,235 is usually 5 days.
3.What payment methods are accepted for BAT54S,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54S,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54S,235?
BAT54S,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54S,235 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,235?
For technical support, including BAT54S,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54S,235 requirements.
6.How does Aetrix verify that BAT54S,235 is sourced from the original manufacturer or authorized distributors?
All BAT54S,235 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,235 meets industry standards.
7.What is the process for return or replacement of BAT54S,235?
All BAT54S,235 units undergo pre-shipment inspection (PSI). If there is an issue with BAT54S,235, 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,235 part is unused and in its original packaging.
Return procedure for BAT54S,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54S,235 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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