Infineon Technologies BAT 54-04 B5003

BAT54-04 from Nexperia

BAT54-04 from Nexperia is a single silicon Schottky diode in SOT23 package, rated for 30 V reverse voltage and 200 mA forward current, with low 400 mV forward voltage at 10 mA and 5 ns reverse recovery time-used for clamping, bias isolation, and low-loss signal routing in automotive sensor interfaces and portable power management circuits.

For engineers reviewing the BAT54-04 datasheet, BAT54-04 pinout, BAT54-04 application, or BAT54-04 equivalent, key selection criteria include its 30 V VR rating, 400 mV VF at 10 mA, 5 ns trr, SOT23 thermal resistance (RthJS ≤ 345 K/W), and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

The BAT54-04 operates as a single-anode, single-cathode Schottky barrier diode with guard ring protection to suppress edge leakage and improve ruggedness under transient stress. Its low junction capacitance (≤10 pF at 1 V) and fast switching enable use in high-frequency clamping and RF detector applications.

Thermal design is constrained by its SOT23 package's relatively high junction-to-soldering-point thermal resistance (345 K/W), requiring careful PCB copper area allocation when operating near 200 mA continuous current or elevated ambient temperatures.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (JEDEC TO-236AB), 3-terminal configuration with anode, cathode, and unused lead (pin 3). Standard pin assignment: Pin 1 = anode, Pin 2 = cathode, Pin 3 = not connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Compared with NSS40201MR6T1G, BAT54-04 offers lower VF and faster trr at 30 V rating; versus BAV99LT1G, it provides superior low-current efficiency and single-diode simplicity for discrete clamping functions.

Availability

BAT54-04 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB port protection, portable power rail isolation, and RF detector circuits requiring stable component supply across production lifecycles.

Supply support for BAT54-04 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 standard logic, discrete, and MOSFET solutions, with manufacturing rooted in process control and automotive qualification rigor.

The BAT54 series belongs to Nexperia's automotive-qualified Schottky diode product line, designed specifically for low-loss, fast-response protection and bias functions in harsh-environment electronic control units.

FAQ

Is BAT54-04 qualified to AEC-Q101?

Yes, BAT54-04 is explicitly qualified to AEC-Q101 Rev D for automotive applications. This includes stress testing for temperature cycling, humidity bias, and high-temperature operating life. The qualification applies specifically to the SOT23-packaged BAT54-04 variant-not all BAT54 family members (e.g., BAT54-02LRH is excluded).

What is the thermal derating behavior above 71 °C ambient?

At ambient temperatures exceeding 71 °C, the BAT54-04's maximum allowable forward current decreases linearly per its thermal resistance (RthJS ≤ 345 K/W) and junction temperature limit (Tj ≤ 150 °C). With no heatsinking, continuous IF must be reduced to zero at TA = 150 °C − (230 mW × 345 K/W)/1000 ≈ 71.5 °C-matching the datasheet's stated TS limit.

Can BAT54-04 replace BAT54-04W in a design?

No-BAT54-04 uses SOT23 packaging (RthJS ≤ 345 K/W), while BAT54-04W uses SOT323 (RthJS ≤ 145 K/W) and has different thermal and mechanical characteristics. Substitution requires PCB footprint redesign and thermal validation; electrical specs are identical, but thermal performance differs significantly.

Does BAT54-04 have a specified ESD rating?

While not formally rated per IEC 61000-4-2, BAT54-04 features guard ring protection and demonstrates typical HBM ESD robustness >8 kV due to its process structure. It is commonly deployed in ESD-sensitive paths (e.g., USB D+/D−), but external TVS devices are recommended for full system-level compliance.