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Nexperia USA Inc. BAT74,235
- Part No.:
- BAT74,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
BAT74,235.pdf
- Description:
- DIODE ARR SCHOTTKY 30V SOT-143B
- Quantity:
- Payment:
- Shipping:
Inventory:9,303
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Product details
Overview
BAT74,235 from Nexperia is a planar Schottky barrier double diode with integrated guard ring for stress protection, housed in an SOT143B surface-mount package. It contains two electrically isolated Schottky diodes optimized for ultra-high-speed switching, with 30 V reverse voltage rating, 200 mA forward current per diode, 800 mV forward voltage at 100 mA, and 5 ns reverse recovery time - used in voltage clamping and protection circuits in DC-DC converters and I/O interface lines.
For engineers reviewing the BAT74,235 datasheet, BAT74,235 pinout, BAT74,235 application, or BAT74,235 equivalent, key selection criteria include low VF for power efficiency, fast trr for high-frequency operation, dual-diode isolation for independent signal paths, and SOT143B footprint compatibility with space-constrained PCB layouts.
Technical Context
The BAT74,235 implements two independent Schottky barrier junctions on a single silicon die with guard-ring structure to suppress edge breakdown under transient stress. Its low-junction-capacitance (10 pF at 1 V) and sub-5 ns reverse recovery enable clean switching in >100 MHz applications.
Thermal resistance of 500 K/W (junction-to-ambient, free air) and 125 °C max junction temperature define its derating envelope; power dissipation is limited to 230 mW at 25 °C ambient, decreasing linearly above that point per the published derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V per diode - sets maximum blocking capability in clamping and reverse-polarity protection. |
| Forward Current (IF) | 200 mA per diode - supports moderate-power signal routing without thermal runaway. |
| Forward Voltage (VF) | 800 mV at IF = 100 mA - minimizes conduction loss in low-voltage rail steering and OR-ing applications. |
| Reverse Recovery Time (trr) | 5 ns - enables reliable operation in >100 MHz switching nodes with minimal switching loss. |
| Diode Capacitance (Cd) | 10 pF at VR = 1 V, f = 1 MHz - preserves signal integrity in high-speed data line protection. |
| Junction Temperature (Tj) | 125 °C max - defines upper thermal limit for continuous operation in industrial environments. |
Pinout & Package
The BAT74,235 is packaged in a compact SOT143B plastic surface-mount case (3.0 × 1.4 × 0.95 mm), optimized for automated placement and reflow soldering. Pin assignments are standardized across Nexperia's Schottky double-diode family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Diode 1) | Output node for Diode 1; connects to load or reference rail in clamping configuration. |
| 2 | Cathode (Diode 2) | Independent output node for Diode 2; enables dual-rail or differential protection schemes. |
| 3 | Anode (Diode 2) | Input node for Diode 2; ties to source or signal line requiring bidirectional isolation. |
| 4 | Anode (Diode 1) | Input node for Diode 1; used for input-side voltage limiting or backfeed prevention. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring protected junction | Prevents premature edge breakdown under ESD or surge stress, improving reliability in unprotected interfaces. |
| Low forward voltage (VF) | 800 mV at 100 mA ensures <2% voltage drop in 3.3 V systems, critical for rail integrity in portable electronics. |
| Ultra-fast reverse recovery | 5 ns trr allows use in 100–500 MHz clock/data line protection without signal distortion or ringing. |
| Electrically isolated diodes | Two independent junctions support separate signal paths - e.g., simultaneous USB VBUS and D+/D− protection. |
Applications
| USB Interface Protection | DC-DC Converter Output Clamping |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+, D−) and VBUS against ESD and overvoltage transients. IC Role / Device Role / Timing Role: Dual Schottky clamp diode providing low-capacitance, low-VF path to ground or rail during surge events. Use Value: 10 pF capacitance avoids signal degradation at 480 Mbps; 5 ns trr prevents latch-up during fast ESD pulses. | Use Scenario: Clamping flyback voltage spikes at synchronous rectifier outputs in buck converters. IC Role / Device Role / Timing Role: Fast-recovery Schottky pair absorbing inductive kickback during MOSFET turn-off. Use Value: 800 mV VF reduces conduction loss vs. standard silicon diodes; 30 V VR matches common 24 V industrial converter rails. |
| I/O Level Translation | Reverse Polarity Protection |
Use Scenario: Isolating mixed-voltage logic domains (e.g., 1.8 V MCU ↔ 3.3 V sensor) while preventing backfeed. IC Role / Device Role / Timing Role: Dual-anode/cathode configuration enabling bidirectional level-shifting with minimal delay. Use Value: Independent diode terminals allow flexible connection topologies; 5 ns trr maintains timing alignment in 100+ MHz digital links. | Use Scenario: Preventing damage from incorrect battery or adapter insertion in portable equipment. IC Role / Device Role / Timing Role: Series-connected Schottky diode in power path with guard ring for surge resilience. Use Value: 200 mA per diode rating supports typical 100–150 mA portable loads; 800 mV VF limits power loss to <150 mW at 200 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky double diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT74,215 | Same SOT143B package, identical electrical specs, but marked *L4 vs. *L5 - different wafer lot traceability. | No functional difference; qualified for same automotive AEC-Q200 stress tests. | Select when full Nexperia traceability documentation is required for Tier-1 automotive BOMs. |
| RB741G | Higher VF (900 mV @ 100 mA), same trr (5 ns), SOD-323 package - smaller footprint but lower power handling (150 mA). | Not suitable for 200 mA continuous applications; better for ultra-dense portable PCBs where space > current rating. | Choose only if board area is constrained below SOT143B minimum keep-out and peak current stays ≤150 mA. |
Compared with SBAT74,215 and RB741G, the BAT74,235 delivers optimal balance of current capacity (200 mA), low VF (800 mV), and proven guard-ring robustness - making it preferred for industrial power rails and interface protection where reliability under transient stress is non-negotiable.
Availability
BAT74,235 is available at Aetrix Electronics and suitable for USB interface protection, DC-DC converter clamping, and reverse polarity protection requiring stable component supply across production lifecycles.
Supply support for BAT74,235 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BAT74 series belongs to Nexperia's precision Schottky diode product line, engineered specifically for high-speed signal integrity and robust transient protection in space-constrained, low-voltage electronic systems.
FAQ
What is the maximum continuous forward current per diode in the BAT74,235?
The BAT74,235 supports 200 mA continuous forward current per diode at Tamb ≤ 25 °C. When both diodes conduct simultaneously, total device current must not exceed 110 mA to maintain safe junction temperature. Derating applies above 25 °C ambient per the 230 mW Ptot limit and 500 K/W thermal resistance.
Does the BAT74,235 have a guard ring, and what does it protect against?
Yes, the BAT74,235 integrates a planar guard ring around each Schottky junction to suppress edge breakdown under electrical overstress. This structure improves robustness against ESD (per IEC 61000-4-2), lightning-induced surges, and fast transients - critical in unprotected I/O and power-input circuits.
Can BAT74,235 be used in place of a single Schottky diode?
Yes, either diode within the BAT74,235 can be used independently by connecting only pins 1+4 (Diode 1) or pins 2+3 (Diode 2). The unused diode remains electrically isolated and does not affect performance - enabling design reuse and BOM simplification in multi-rail systems.
What is the thermal resistance (Rth(j-a)) of BAT74,235, and how does it impact layout?
The junction-to-ambient thermal resistance is 500 K/W in free air. To sustain 200 mA continuous operation, PCB layout must minimize local heating: use ≥10 mm² copper pour per anode/cathode pad, avoid enclosed cavities, and ensure ≥2 mm clearance from heat sources. No heatsink is feasible due to SOT143B size.
BAT74,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Independent
- 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:
- 125°C (Max)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143B
BAT74,235 FAQ
1.How can I place an order for BAT74,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT74,235 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 BAT74,235 reliable?
The price and inventory of BAT74,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT74,235 is usually 5 days.
3.What payment methods are accepted for BAT74,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT74,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT74,235?
BAT74,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT74,235 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 BAT74,235?
For technical support, including BAT74,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT74,235 requirements.
6.How does Aetrix verify that BAT74,235 is sourced from the original manufacturer or authorized distributors?
All BAT74,235 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 BAT74,235 meets industry standards.
7.What is the process for return or replacement of BAT74,235?
All BAT74,235 units undergo pre-shipment inspection (PSI). If there is an issue with BAT74,235, 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 BAT74,235 part is unused and in its original packaging.
Return procedure for BAT74,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT74,235 Tags
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BAV99-7-F
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BAV99,215
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