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STMicroelectronics BAT46ZFILM
- Part No.:
- BAT46ZFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAT46ZFILM.pdf
- Description:
- DIODE SCHOTTKY 100V 150MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:20,790
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Product details
Overview
BAT46ZFILM from STMicroelectronics is a single high-voltage small-signal Schottky diode in SOD-123 package, designed for low-loss protection and signal routing in space-constrained DC/DC converters and USB power switches. It delivers 100 V repetitive peak reverse voltage, 150 mA continuous forward current, 0.45 V typical forward voltage at 10 mA, 6 pF junction capacitance at 1 V, and operates up to 150 °C junction temperature.
For engineers reviewing the BAT46ZFILM datasheet, BAT46ZFILM pinout, BAT46ZFILM application, or BAT46ZFILM equivalent, key selection criteria include low VF for minimal conduction loss, low C for high-frequency routing integrity, high VRRM for 24–48 V system compatibility, and SOD-123 thermal performance in compact PCB layouts.
Technical Context
This Schottky diode uses a metal–semiconductor junction to eliminate minority-carrier storage delay, enabling negligible switching losses and fast recovery (trr not specified but inherently sub-nanosecond). Its low forward voltage drop stems from optimized barrier height and epitaxial structure, supporting efficient clamping and reverse-polarity protection in low-power analog and digital interfaces.
The device is rated for 150 °C maximum junction temperature and exhibits 500 °C/W junction-to-ambient thermal resistance on epoxy PCBs with recommended pad layout. Reverse leakage remains below 5 µA at 75 V and 25 °C, ensuring stable blocking behavior in battery-backed and always-on circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input protection in 24 V industrial rails and 48 V telecom systems without breakdown |
| IF(AV) | 150 mA - sufficient for signal-level routing, ESD clamp biasing, and low-current hold-up paths |
| VF @ 10 mA | 0.45 V typ - reduces forward conduction loss by >40% vs. standard silicon diodes at same current |
| C @ 1 V | 6 pF - enables clean signal integrity in USB 2.0 and I²C bus protection up to ~100 MHz |
| Tj(max) | 150 °C - allows operation in sealed enclosures or near heat sources without derating |
| IR @ 75 V | 5 µA max @ 25 °C - ensures reliable reverse isolation in battery monitoring and backup power paths |
| Rth(j-a) | 500 °C/W - defines thermal rise under steady-state 150 mA load on standard FR4 with minimal copper area |
Pinout & Package
SOD-123 surface-mount package: 2.55–2.85 mm length, 1.4–1.7 mm width, 1.45 mm height, cathode marked with band. Optimized for automated placement and reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source/rail side in reverse-polarity protection; accepts up to 1 A surge for 10 ms |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; ties to ground or return path; withstands 100 V reverse bias continuously |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.45 V VF at 10 mA enables <1 mW dissipation in 3.3 V logic rail clamping |
| Negligible switching losses | Zero minority-carrier storage eliminates reverse recovery charge, critical for >1 MHz switching nodes |
| Low forward voltage drop | 0.25 V at 0.1 mA supports ultra-low-current bias networks in sensor front-ends |
| Surface mount device | SOD-123 footprint occupies only 4.3 mm² PCB area-ideal for wearables and IoT edge nodes |
Applications
| USB Power Switch Protection | Industrial Sensor Signal Routing |
|---|---|
Use Scenario: Preventing backfeed and overvoltage in dual-source USB ports (e.g., host + battery). IC Role / Device Role / Timing Role: Unidirectional blocking diode placed between VBUS paths to enforce power flow direction. Use Value: 0.45 V VF minimizes voltage drop across switch path; 100 V VRRM guards against hot-plug transients. | Use Scenario: Isolating analog sensor outputs from shared microcontroller ADC inputs. IC Role / Device Role / Timing Role: Signal-routing Schottky diode enabling multiplexed sensor readout without cross-talk. Use Value: 6 pF capacitance preserves bandwidth >100 MHz; low IR avoids loading high-Z sensor outputs. |
| Reverse-Polarity Input Protection | Low-Power Hold-Up Circuit |
Use Scenario: Safeguarding 24 V DC input stages of PLC I/O modules against incorrect wiring. IC Role / Device Role / Timing Role: Series-connected protection diode on main supply rail before LDO or DC/DC converter. Use Value: 150 mA IF rating handles full module quiescent load; 150 °C Tj(max) sustains operation in enclosed cabinets. | Use Scenario: Maintaining RTC or SRAM power during brief AC mains interruption in smart meters. IC Role / Device Role / Timing Role: OR-ing diode between main supply and supercapacitor backup path. Use Value: Low VF reduces energy loss during capacitor discharge; SOD-123 thermal mass stabilizes junction temp during pulse loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS12 | Higher VF (0.5 V min), larger SOD-123 variant with 200 mA IF rating | Better surge handling but higher conduction loss in low-voltage rails | Select when IFSM >1 A or long-term 150–200 mA DC load is required |
| BAT54C | Common-cathode dual diode in SOT-23; VF = 0.33 V @ 10 mA; VRRM = 30 V | Limited to ≤3.3 V systems; saves board space for dual-rail protection | Choose for dual-rail (e.g., VDD/VIO) clamping where 30 V rating suffices |
Compared with SS12 and BAT54C, BAT46ZFILM offers the optimal balance of 100 V blocking, ultra-low VF, and minimal 4.3 mm² footprint-making it preferred for space-limited 24–48 V industrial interfaces requiring precision low-loss routing.
Availability
BAT46ZFILM is available at Aetrix Electronics and suitable for USB power management, industrial sensor signal routing, reverse-polarity input protection, and low-power hold-up circuits requiring stable component supply across production lifecycles.
Supply support for BAT46ZFILM 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, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The BAT46 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-efficiency protection and routing in space-constrained, thermally demanding applications such as programmable logic controllers and portable instrumentation.
FAQ
What is the cathode marking convention for BAT46ZFILM?
The cathode is marked by a visible band at one end of the SOD-123 package body. When viewed from top with marking band on left, the left pad is cathode and right pad is anode-confirmed in ST's package drawing Figure 12 and ordering table.
Can BAT46ZFILM be used in 5 V logic-level clamping applications?
Yes. With 0.45 V VF at 10 mA and 0.25 V at 0.1 mA, it provides effective clamping below 5 V logic thresholds while adding negligible loading. Its 100 V VRRM ensures margin against ESD and transient overshoot beyond 5 V rails.
Is BAT46ZFILM RoHS-compliant and lead-free?
Yes. BAT46ZFILM is supplied in ECOPACK® packaging with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU and JEDEC JESD97. The inner box label indicates lead-free status and maximum soldering temperature (260 °C).
How does thermal performance compare between SOD-123 and SOT-23 packages for this diode?
SOD-123 has Rth(j-a) = 500 °C/W on FR4, while SOT-23 variants (e.g., BAT46FILM) specify 500 °C/W as well-but SOD-123's larger pad area improves heat spreading. In practice, SOD-123 achieves ~10–15 °C lower junction rise at 150 mA due to superior copper coupling in standard layouts.
BAT46ZFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123
- 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:
- 1 V @ 250 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-123
- Operating Temperature - Junction:
- 150°C (Max)
BAT46ZFILM FAQ
1.How can I place an order for BAT46ZFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46ZFILM 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 BAT46ZFILM reliable?
The price and inventory of BAT46ZFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46ZFILM is usually 5 days.
3.What payment methods are accepted for BAT46ZFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46ZFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46ZFILM?
BAT46ZFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46ZFILM 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 BAT46ZFILM?
For technical support, including BAT46ZFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46ZFILM requirements.
6.How does Aetrix verify that BAT46ZFILM is sourced from the original manufacturer or authorized distributors?
All BAT46ZFILM 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 BAT46ZFILM meets industry standards.
7.What is the process for return or replacement of BAT46ZFILM?
All BAT46ZFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46ZFILM, 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 BAT46ZFILM part is unused and in its original packaging.
Return procedure for BAT46ZFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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