My Inquiry
My Account
STMicroelectronics BAT46SWFILM
- Part No.:
- BAT46SWFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT46SWFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:5,953
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAT46SWFILM from STMicroelectronics is a surface-mount, series-connected dual Schottky diode in SOT-323 package, rated for 100 V repetitive peak reverse voltage and 150 mA continuous forward current, with typical junction capacitance of 6 pF at 1 V and low forward voltage drop (0.45 V at 10 mA, 25 °C), used in high-speed signal routing and polarity protection circuits in portable power management.
For engineers reviewing the BAT46SWFILM datasheet, BAT46SWFILM pinout, BAT46SWFILM application, or BAT46SWFILM equivalent, key selection criteria include its series configuration for bidirectional clamping, low leakage (<0.8 µA at 10 V, 25 °C), thermal resistance of 550 °C/W (junction-to-ambient on epoxy PCB), and compatibility with automated SMT assembly under JEDEC J-STD-020 reflow profiles.
Technical Context
The BAT46SWFILM integrates two Schottky diodes in series within a single SOT-323 outline, enabling symmetrical clamping or sequential conduction paths without external interconnects. Its metal–semiconductor junction delivers negligible reverse recovery time and low forward voltage, critical for minimizing conduction loss in low-voltage, high-frequency signal paths.
This configuration supports bidirectional transient suppression and DC blocking in compact interfaces such as USB data lines and low-power sensor I/O. The device operates up to 150 °C junction temperature and meets ECOPACK® environmental compliance with lead-free second-level interconnect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Supports reverse voltage transients up to 100 V without breakdown in protection applications. |
| IF | 150 mA - Continuous forward current rating suitable for signal-level routing and biasing circuits. |
| C (typ) | 6 pF at 1 V - Low junction capacitance preserves signal integrity in >100 MHz digital or RF-coupled paths. |
| VF | 0.45 V at 10 mA, 25 °C - Minimizes forward conduction loss in battery-powered or low-dropout signal conditioning. |
| IR | 0.8 µA at 10 V, 25 °C - Enables reliable high-impedance node isolation in precision analog front-ends. |
| Rth(j-a) | 550 °C/W - Thermal performance defined for SOT-323 on epoxy FR4 PCB with recommended pad layout. |
| Tj(max) | 150 °C - Allows operation in thermally constrained environments such as sealed industrial sensors. |
Pinout & Package
SOT-323 package: 3-terminal plastic surface-mount package with gull-wing leads, 1.8–2.2 mm body length, 1.15–1.35 mm body width, and 1.8–2.4 mm height; compliant with JEDEC MO-178AB, RoHS and ECOPACK® standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Pin 1) | Input anode of first diode | Primary entry point for forward-biased current into the series chain; connects to source-side signal or supply rail. |
| Cathode 1 / Anode 2 (Pin 2) | Internal interconnect node | Electrically isolated internal junction between diodes; not externally accessible - enables monolithic series topology. |
| Cathode 2 (Pin 3) | Output cathode of second diode | Final current exit point; used for clamped output or return path in bidirectional protection schemes. |
Key Features
| Feature | Design Value |
|---|---|
| Series diode configuration | Monolithic integration eliminates trace inductance and layout asymmetry between discrete series diodes. |
| Low VF Schottky junction | 0.45 V @ 10 mA enables efficient clamping in 3.3 V and lower logic domains without excessive power dissipation. |
| ECOPACK® lead-free finish | Meets JEDEC JESD97 marking and soldering requirements for environmentally compliant manufacturing. |
| High VRRM/IF ratio | 100 V / 150 mA supports robust overvoltage tolerance while maintaining signal-path efficiency in space-constrained designs. |
Applications
| USB 2.0 Data Line Protection | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Protecting D+ and D− lines against ESD and cable-induced transients in portable USB peripherals. IC Role / Device Role / Timing Role: Series-connected Schottky clamp limiting voltage excursion to <0.5 V above rail during fast transients. Use Value: Prevents latch-up in USB transceivers by clamping with sub-100 ps response and no reverse recovery delay. | Use Scenario: Providing isolated, low-loss bias current to MEMS accelerometers or Hall-effect sensors in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Forward-biased series diode delivering stable bias while blocking reverse leakage from sensor output. Use Value: Maintains sensor accuracy with <0.8 µA leakage at 10 V, avoiding signal offset drift in high-impedance analog inputs. |
| RS-485 Receiver Input Clamping | DC-DC Feedback Path Isolation |
Use Scenario: Limiting common-mode overvoltage on RS-485 receiver inputs in industrial fieldbus nodes exposed to ground potential differences. IC Role / Device Role / Timing Role: Bidirectional clamping via series configuration across differential pair to ±100 V rails. Use Value: Extends system immunity beyond ISO 801-2 Level 4 without adding external TVS or resistor networks. | Use Scenario: Isolating feedback resistors from switching noise in isolated flyback or forward converter feedback loops. IC Role / Device Role / Timing Role: Series diode blocking AC noise coupling while permitting DC bias current flow to optocoupler input. Use Value: Reduces output voltage ripple by >15 dB at 100 kHz due to low Cj (6 pF) and absence of minority-carrier storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar series-connected Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Single Schottky diode (0.2 A, 30 V, SOD-323); no series configuration | Lacks integrated dual-diode topology; requires external series placement for equivalent function | Select when only single-diode functionality is needed and board space allows discrete layout. |
| RB520S-30T1G | Single Schottky (0.2 A, 30 V, SOT-323); higher VF (0.55 V @ 10 mA) | Lower VRRM limits use in 100 V systems; unsuitable for high-voltage clamping | Prefer only in ≤30 V applications where cost sensitivity outweighs voltage margin requirements. |
Compared with NSR0230HT1G and RB520S-30T1G, BAT46SWFILM uniquely provides monolithic series connection, 100 V rating, and 6 pF capacitance - enabling compact, high-fidelity transient suppression in 3.3 V–5 V interfaces where layout parasitics and voltage headroom are critical.
Availability
BAT46SWFILM is available at Aetrix Electronics and suitable for USB interface protection, RS-485 receiver clamping, and isolated DC-DC feedback path isolation requiring stable component supply, full traceability, and long-term production support.
Supply support for BAT46SWFILM 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, analog ICs, and discrete components for industrial, automotive, and consumer markets.
The BAT46 series was developed specifically for high-speed, low-loss signal routing and protection in space-constrained portable and industrial electronics, emphasizing Schottky performance, SMT scalability, and environmental compliance.
FAQ
What is the pin configuration of BAT46SWFILM in SOT-323?
BAT46SWFILM uses a 3-pin SOT-323 package with Pin 1 = Anode 1, Pin 2 = internal series node (not accessible), Pin 3 = Cathode 2. This monolithic series arrangement eliminates external wiring between two diodes and ensures matched thermal and electrical characteristics.
Does BAT46SWFILM support reflow soldering per JEDEC J-STD-020?
Yes - BAT46SWFILM is qualified for standard Pb-free reflow per JEDEC J-STD-020, with maximum peak temperature of 260 °C (10 s max). Its ECOPACK® construction includes lead-free terminations and complies with moisture sensitivity level MSL3.
Can BAT46SWFILM replace BAT46SFILM in SOT-23?
No - although both are series-configured Schottky diodes, BAT46SWFILM uses SOT-323 (smaller footprint, 6 mg weight) versus SOT-23 (10 mg), and has different thermal resistance (550 vs 500 °C/W). Layout redesign and thermal validation are required for substitution.
What is the maximum surge current rating for BAT46SWFILM?
The datasheet specifies IFSM = 1 A for 10 ms sinusoidal half-sine pulse (Tj = 25 °C). This rating applies to short-duration transients such as ESD or inductive kickback, but derating is required above 25 °C ambient per thermal impedance curves in Figure 8.
BAT46SWFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 150mA (DC)
- 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
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAT46SWFILM FAQ
1.How can I place an order for BAT46SWFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46SWFILM 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 BAT46SWFILM reliable?
The price and inventory of BAT46SWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46SWFILM is usually 5 days.
3.What payment methods are accepted for BAT46SWFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46SWFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46SWFILM?
BAT46SWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46SWFILM 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 BAT46SWFILM?
For technical support, including BAT46SWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46SWFILM requirements.
6.How does Aetrix verify that BAT46SWFILM is sourced from the original manufacturer or authorized distributors?
All BAT46SWFILM 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 BAT46SWFILM meets industry standards.
7.What is the process for return or replacement of BAT46SWFILM?
All BAT46SWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46SWFILM, 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 BAT46SWFILM part is unused and in its original packaging.
Return procedure for BAT46SWFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT46SWFILM Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
