BAT54J,115

BAT54J is a dual Schottky diode pair in a small SOT-23 package. It’s part of the BAT54 family (others include BAT54A and BAT54C) and is used for fast switching with a very low forward voltage drop.
Key points:
- Two Schottky diodes in one package; polarity/configuration (common anode/cathode) depends on the exact variant from the manufacturer—check the datasheet for BAT54J in your supplier’s lineup.
- Typical ratings (per diode): around 30 V reverse voltage; about 0.2 A forward current; low forward drop (roughly 0.2–0.3 V at modest current); very low leakage at room temperature.
- Common applications: level shifting, diode OR-ing, clamping/protection on signal lines, small-signal rectification and fast switching tasks.
Notes:
- The “115” you mention is likely a date/lot or package code, not a spec.
- Always verify the exact pinout and ratings in the specific datasheet for the BAT54J variant you’re using, since polarity and max current can vary by supplier.

Common equivalents (drop-in if package/pinout match): MMBAT54J (Diodes Inc), BAT54J (ON Semiconductor), BAT54J (Nexperia), BAT54J / MMBAT54J (Vishay), RBAT54J (ROHM). Confirm package (SOT‑23/SOD variant), pinout and electrical specs (Vr, If, leakage, Vf) before substitution.

Concise features of BAT54J (dual Schottky diode in one package):
- Dual Schottky barrier diodes in a single SOT-23 package
- Reverse voltage (VRRM): 30 V
- Forward current (IF(AV)): ~0.2 A (typical, up to a few 100 mA depending on variant)
- Very low forward voltage drop: typical ~0.2–0.4 V at forward currents
- Fast switching; negligible reverse recovery
- Suitable for high-speed, low-loss rectification and logic-level applications
- Temperature range: approximately -55°C to +125°C
- Pb-free, RoHS-compliant
- Pinout: two diodes with a common pin; variants may be common anode or common cathode (check datasheet for the exact configuration)
Common uses: OR-ing, protection/clamping, level shifting, and signal/rectification tasks in compact layouts.

BAT54J (suffix ,115 denotes packaging/lead finish) is a 3‑pin SOT‑23 device. It contains two Schottky diodes in a common‑cathode configuration. Pinout (SOT‑23, top view): pin 1 = Anode 1, pin 2 = Common cathode, pin 3 = Anode 2. Typical use: low‑forward‑voltage switching, steering, clamping and protection.

The designation BAT54J,115 refers to a BAT54J Schottky diode variant that is made and sold by multiple semiconductor manufacturers (examples include Diodes Incorporated, Nexperia, ROHM, STMicroelectronics and Vishay depending on the distributor). These makers are semiconductor companies — firms that design, manufacture and supply discrete semiconductor components (diodes, transistors), analog and power-management ICs, and related electronic components for industrial, consumer and communications markets.

- BAT54J: Dual Schottky diode with common cathode. Applications: diode-ORing of two power rails, reverse-polarity protection, input protection/level shifting in 3–5 V logic, fast, low-loss rectification in battery-powered circuits, and clamping for signal lines.
- BAT115: Fast-switching diode. Applications: high-speed switching and fast recovery in logic/pulse circuits, rectification in switching power supplies, demodulation, snubber/clamp circuits, and protection of sensitive inputs.

BAT54J,115 is a dual Schottky diode supplied in an SOT‑23 (TO‑236AA) 3‑lead surface‑mount package. Check the manufacturer datasheet for exact footprint and packaging (tape‑and‑reel) details.