BAT46WJ - 100V 250mA Schottky Diode SOD-323F | Nexperia
MPN: BAT46WJ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.09 | $0.09 |
| 10 | $0.07 | $0.70 |
| 100 | $0.045 | $4.50 |
| 500 | $0.032 | $16.00 |
| 1,000 | $0.024 | $24.00 |
Drop-in alternatives for BAT46WJ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BAT46WJ-QX
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.065 / Unit
View Datasheet βBAT46WJ,115
β Drop-Inπ Reference alternative (not in catalog)
BAT46WJ/DG/B3X
β Drop-Inπ Reference alternative (not in catalog)
BAT46WJ Maximum Ratings & Electrical Characteristics
| Diode Type | Single planar Schottky barrier diode with guard ring |
| Repetitive Peak Reverse Voltage (VRRM) | 100 V |
| Average Forward Current (IF(AV)) | 250 mA |
| Maximum Forward Voltage (VF) | 850 mV |
| Non-Repetitive Peak Forward Current (IFSM) | 2.5 A |
| Maximum Junction Temperature | 150 C |
| Package | SOD323F (SC-90), flat lead SMD |
| Mounting Type | Surface Mount |
| Configuration | Single diode |
| Technology | Schottky barrier, planar |
| Reverse Recovery | No reverse recovery charge (Schottky) |
| Typical Applications | High-speed switching, voltage clamping, line termination, reverse polarity protection |
| RoHS Status | Compliant |
| Ordering Suffix | BAT46WJ,115 (tape and reel ordering code) |
BAT46WJ Pin Configuration
| Pin 1 | K β Cathode (marked end of SOD323F package) |
| Pin 2 | A β Anode |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BAT46WJ is suitable for 6 applications: Reverse Polarity Protection, Voltage Clamping and Snubbing, High-Speed Switching and Line Termination, Diode-OR Power Rail Combining, RF and Signal Detection, Portable and Battery-Powered Devices.
Reverse Polarity Protection
The BAT46WJ's 100 V reverse voltage rating provides wide margin over 12 V and 24 V supply rails, while its Schottky forward voltage of up to 850 mV keeps the series conduction loss acceptable at the rated 250 mA average current. In a typical battery-input protection stage, the diode is placed in series with the positive feed so that a reversed supply is blocked by the diode's 100 V blocking capability rather than shorted. Because the Schottky junction has no reverse recovery charge, there is no current spike when polarity is restored. The trade-off is a fixed ~0.5 to 0.85 V drop that must be budgeted in low-voltage rails, and reverse leakage at elevated temperature should be checked against standby-current limits.
Recommended
Voltage Clamping and Snubbing
In low-power inductive loads such as relay coils, small solenoids and fan drivers, the BAT46WJ serves as a freewheeling or clamp diode. Its 100 V VRRM absorbs the inductive kickback of 12 V and 24 V coils with wide margin, and the 2.5 A non-repetitive surge rating handles the initial current transfer when the switch opens, since the full coil current momentarily flows through the diode. The zero reverse recovery of the Schottky junction prevents the ringing and EMI that PN freewheeling diodes introduce at turn-off. Heat is modest because the diode conducts only during the decay interval, but the designer should confirm the coil energy per cycle keeps junction temperature below the 150 C maximum.
Recommended
High-Speed Switching and Line Termination
Per the Nexperia datasheet, the BAT46WJ is specified for high-speed switching and line termination. The metal-semiconductor junction stores essentially no minority-carrier charge, so switching is limited only by junction capacitance, enabling clean transitions in MHz-class digital and pulse circuits. In line-termination roles, it clamps overshoot on data and clock lines without adding the slow recovery tail of a PN diode. The integrated guard ring stabilizes breakdown behavior under repetitive stress, protecting against ESD-like transient events. Designers should note the 250 mA average current ceiling and the higher reverse leakage of Schottky junctions when terminating high-impedance analog lines.
Recommended
Diode-OR Power Rail Combining
When combining two low-current supplies such as a battery and an auxiliary adapter, a BAT46WJ in each feed provides simple diode-OR isolation. The 100 V rating covers virtually any small-system rail pair, and the up-to-850 mV forward drop is usually tolerable on 5 V and higher rails, where the relative loss is under 17%. Reverse leakage of the blocked diode prevents full isolation but is generally acceptable at room temperature. For rails below 3.3 V or currents approaching the 250 mA average limit, the conduction loss and leakage push toward ideal-diode FET controllers instead. The small SOD323F footprint keeps the ORing stage compact on dense boards.
Recommended
RF and Signal Detection
Schottky barrier diodes are the classical choice for envelope detection and RF demodulation because of their low forward voltage and absence of recovery charge. The BAT46WJ can rectify RF-envelope signals in low-frequency IF and AM detection stages and clip signal excursions in protection networks ahead of sensitive inputs. Its guard-ring planar construction gives predictable, repeatable conduction characteristics, which matters in detection circuits whose transfer accuracy depends on the diode curve. Note that this part is not an ultra-low-barrier RF detector diode; its 850 mV maximum VF at rated current makes it best for medium-level signals rather than microvolt square-law detection, where dedicated zero-bias detectors outperform it.
Recommended
Portable and Battery-Powered Devices
In portable equipment, the BAT46WJ protects against reversed battery insertion and isolates charging sources. Its small, flat SOD323F package suits dense handheld PCBs, and the 100 V rating comfortably covers multi-cell battery stacks up to several tens of volts. The up-to-850 mV series drop reduces effective battery runtime at the 250 mA ceiling, so it fits best in sub-100 mA consumer loads where the loss is a few tens of milliwatts. Designers of sleep-current-sensitive products must account for Schottky reverse leakage, which multiplies at elevated temperature; verify that the blocked-path leakage stays well below the product's standby budget in worst-case hot environments.
Recommended
Recommended Products Summary
Engineering reference data for BAT46WJ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BAT46WJ-QX | BAT46WJ,115 | BAT46WJ/DG/B3X |
|---|---|---|---|---|
| Package | SOD323F (SC-90) | SOD323F (SC-90) - same | SOD323F (SC-90) - same | SOD323F (SC-90) - same |
| Brand | Nexperia | Nexperia | Nexperia | Nexperia |
| Reverse Voltage (VRRM) | 100 V | 100 V | 100 V | 100 V |
| Average Forward Current | 250 mA | 250 mA | 250 mA | 250 mA |
| Max Forward Voltage (VF) | 850 mV | 850 mV | 850 mV | 850 mV |
| Surge Current (IFSM) | 2.5 A | 2.5 A | 2.5 A | 2.5 A |
| Max Junction Temperature | 150 C | 150 C | 150 C | 150 C |
| Packing / Flow Suffix | Standard (,115 tape and reel) | -QX flow/packing suffix | ,115 tape and reel | Distributor-specific packing |
| Guard Ring Protection | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
Key Differentiators
- 100 V blocking in a small SOD323F package (vs 1N5711WS-7-F)
- Flat-lead SOD323F package for placement reliability (vs BAT46W)
- Integrated guard ring for stress robustness (vs BAT46WJ-QX)
Design Notes
Estimated: with a series drop of up to 850 mV at the full 250 mA average current, conduction loss reaches about 210 mW. The small SOD323F body has limited dissipation capability, so junction temperature rise depends heavily on PCB copper area. For continuous loads above roughly 150 mA, pour additional copper on both anode and cathode pads and verify that ambient plus self-heating keeps the junction below the 150 C maximum with margin.
The BAT46WJ uses the SOD323F flat-lead outline (SC-90), NOT the common gull-wing SOD-323 or SOD-123. Do not reuse a standard SOD-323 footprint: the flat leads sit lower and the recommended land pattern in the Nexperia datasheet differs. Using the wrong pattern risks open solder joints after reflow and poor inspection coverage. Confirm the footprint against the latest Nexperia package drawing before release to fabrication.
Schottky reverse leakage rises roughly an order of magnitude per 25 C. In reverse-polarity or ORing roles on battery-backed rails, calculate the blocked-diode leakage at the maximum ambient, not at room temperature, and check it against standby-current specifications. Also remember the 2.5 A IFSM figure is non-repetitive only; repetitive surges such as repeated hot-plug events must stay within the 250 mA average and thermal limits, or use a larger rectifier.
Because the Schottky junction has no reverse recovery charge, the BAT46WJ produces far less turn-off ringing than a PN diode in clamping and freewheeling roles, reducing EMI filter burden in MHz-class switching circuits. For fastest, cleanest clamping on signal lines, keep the diode loop area small by placing it directly across the protected node and its local ground reference, minimizing parasitic inductance in the clamp path.
Compliance Information
RoHS compliant and lead-free per Nexperia product listing and DigiKey BAT46WJ,115 product page. REACH, halogen-free and conflict-minerals status not stated in the provided data.
