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STMicroelectronics BAT46JFILM
- Part No.:
- BAT46JFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BAT46JFILM.pdf
- Description:
- DIODE SCHOTTKY 100V 150MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:120,317
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Product details
Overview
BAT46JFILM from STMicroelectronics is a single high-voltage small-signal Schottky diode in SOD-323 package, featuring 100 V repetitive peak reverse voltage, 150 mA continuous forward current, 6 pF typical junction capacitance at 1 V, 0.45 V forward voltage at 10 mA, and 150 °C maximum junction temperature - used for ESD protection and signal routing in space-constrained portable electronics.
For engineers reviewing the BAT46JFILM datasheet, BAT46JFILM pinout, BAT46JFILM application, or BAT46JFILM equivalent, this page delivers verified electrical parameters, thermal behavior, package dimensions, real-world use cases, and validated alternative parts for fast prototyping and BOM optimization in low-power analog and interface circuits.
Technical Context
The BAT46JFILM operates as a unidirectional low-loss rectifier with negligible switching losses due to its metal–semiconductor junction, enabling efficient clamping and steering in high-frequency signal paths up to ~100 MHz. Its low 0.45 V forward drop at 10 mA and sub-1 µA reverse leakage at 10 V (Tj = 25 °C) support precision biasing and rail-to-rail signal integrity.
Thermal performance is defined by Rth(j-a) = 550 °C/W on epoxy PCB with recommended pad layout, and junction temperature is limited to 150 °C - making it suitable for ambient temperatures up to 125 °C under derated current conditions per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports reverse blocking in 48 V and 36 V industrial bus lines without breakdown |
| IF(AV) | 150 mA - sufficient for signal-level current routing in sensor interfaces and logic-level translators |
| VF @ 10 mA | 0.45 V - minimizes forward conduction loss in low-voltage bias networks (e.g., 3.3 V/1.8 V rails) |
| C @ 1 V | 6 pF - enables <100 MHz signal path integrity in RF front-end protection and USB data line clamping |
| IR @ 10 V | 0.8 µA max at 25 °C - ensures minimal leakage-induced offset in high-impedance analog sensing nodes |
| Tj(max) | 150 °C - allows operation in sealed enclosures or near heat-generating ICs without thermal shutdown |
| Rth(j-a) | 550 °C/W - requires minimum 1.1 mm² copper pad per lead on FR4 to sustain 150 mA continuously |
Pinout & Package
SOD-323 surface-mount package: 1.17 mm × 1.52 mm × 0.97 mm body, cathode marked with band, JEDEC-compliant footprint with 0.25–0.44 mm lead width and 1.11–1.45 mm lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; must be routed with <0.5 mm trace clearance to avoid parasitic coupling |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; tied to reference plane or protected signal return to enable clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.45 V VF at 10 mA enables >95% efficiency in 3.3 V signal-path clamping |
| Negligible switching losses | No minority-carrier storage delay permits clean edge handling in 10–50 MHz digital signal routing |
| Low forward voltage drop | Sub-0.5 V threshold avoids false triggering in 1.8 V logic-level protection schemes |
| Surface mount device | SOD-323 footprint (1.52 mm × 1.11 mm) fits 0402-class board area constraints in wearables and IoT sensors |
Applications
| USB 2.0 Data Line Protection | Low-Voltage Sensor Biasing |
|---|---|
Use Scenario: Clamping transient spikes on D+ and D− lines of USB 2.0 peripherals exposed to ESD events per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Signal-line Schottky clamp diode providing bidirectional overvoltage protection without adding propagation delay. Use Value: 6 pF capacitance preserves 480 Mbps eye diagram integrity; 0.45 V VF ensures no DC offset on differential pair under normal operation. | Use Scenario: Providing stable bias current to MEMS pressure sensor bridge while rejecting supply ripple. IC Role / Device Role / Timing Role: Low-leakage series diode in constant-current source leg, isolating sensor from noisy LDO output. Use Value: 0.8 µA IR at 10 V prevents >1 mV error in 1 MΩ bridge impedance; 150 °C Tj rating supports operation inside sealed automotive cabin modules. |
| RF Front-End Antenna Switching | Logic-Level Translation Interface |
Use Scenario: Steering RF signals between antenna and transceiver in sub-GHz ISM-band IoT transceivers. IC Role / Device Role / Timing Role: High-speed signal routing diode in passive SPDT configuration, leveraging low C and fast recovery. Use Value: 6 pF capacitance limits insertion loss to <0.3 dB at 868 MHz; SOD-323 size allows placement within 2 mm of RF switch IC. | Use Scenario: Level-shifting I²C clock/data lines between 3.3 V microcontroller and 1.8 V sensor. IC Role / Device Role / Timing Role: Passive bidirectional level translator using Schottky forward drop to offset voltage domains. Use Value: 0.45 V VF creates precise 1.5 V translation window; 150 mA IF rating handles 3 mA bus pull-up without saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar small-signal Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Lower VRRM (30 V), lower VF (0.32 V @ 10 mA), same SOD-323 package | Not suitable for 48 V bus protection; better for 3.3 V-only systems requiring ultra-low VF | Select when forward drop dominates design priority and reverse voltage ≤30 V |
| BAT54CWS | Common-cathode dual diode in SOT-323, VRRM = 30 V, VF = 0.33 V @ 10 mA | Requires dual-channel protection or biasing; not pin-compatible for single-diode replacement | Choose only when dual-diode topology matches schematic and board layout |
Compared with NSR0230HT1G and BAT54CWS, BAT46JFILM uniquely balances 100 V reverse capability with 6 pF capacitance and SOD-323 size - making it the only option among the three for compact 36–48 V signal routing where both robustness and RF performance matter.
Availability
BAT46JFILM is available at Aetrix Electronics and suitable for USB 2.0 interface protection, MEMS sensor biasing, RF antenna switching, and I²C level translation requiring stable component supply across production volumes from prototype to mass manufacturing.
Supply support for BAT46JFILM 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The BAT46 series belongs to ST's small-signal discrete portfolio, engineered specifically for high-frequency signal integrity, low-loss routing, and compact ESD protection in portable and space-constrained electronic systems.
FAQ
What is the maximum continuous forward current rating for BAT46JFILM?
The BAT46JFILM is rated for 150 mA continuous forward current at Tj = 25 °C. Derating is required above 25 °C ambient: Figure 2 shows usable current drops to ~90 mA at 85 °C ambient on standard FR4 with recommended pad layout, based on its 550 °C/W junction-to-ambient thermal resistance.
Does BAT46JFILM have lead-free construction?
Yes. BAT46JFILM is supplied in an ECOPACK®-compliant SOD-323 package with lead-free second-level interconnect, meeting JEDEC JESD97 marking requirements. The inner box label specifies the lead-free status and maximum soldering temperature (260 °C per JEDEC J-STD-020).
Can BAT46JFILM replace BAT54 series diodes in 3.3 V applications?
It can functionally replace BAT54-series diodes in 3.3 V signal routing, but with trade-offs: BAT46JFILM has higher VF (0.45 V vs. 0.33 V) and higher VRRM (100 V vs. 30 V). Use it only when 100 V robustness or lower leakage at elevated temperature is needed - otherwise BAT54 variants offer better efficiency at low voltage.
What is the reverse leakage current at 75 V and 125 °C?
Per Figure 4, reverse leakage current for BAT46JFILM reaches approximately 100 µA at VR = 75 V and Tj = 125 °C. This value is derived from the typical curve showing IR ≈ 1×10² µA under those conditions - critical for high-temperature industrial sensor interfaces where leakage-induced offset must be modeled.
BAT46JFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 75 V
- Capacitance @ Vr, F:
- 10pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- 150°C (Max)
BAT46JFILM FAQ
1.How can I place an order for BAT46JFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46JFILM 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 BAT46JFILM reliable?
The price and inventory of BAT46JFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46JFILM is usually 5 days.
3.What payment methods are accepted for BAT46JFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46JFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46JFILM?
BAT46JFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46JFILM 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 BAT46JFILM?
For technical support, including BAT46JFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46JFILM requirements.
6.How does Aetrix verify that BAT46JFILM is sourced from the original manufacturer or authorized distributors?
All BAT46JFILM 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 BAT46JFILM meets industry standards.
7.What is the process for return or replacement of BAT46JFILM?
All BAT46JFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46JFILM, 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 BAT46JFILM part is unused and in its original packaging.
Return procedure for BAT46JFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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