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STMicroelectronics BAR46AFILM
- Part No.:
- BAR46AFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAR46AFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,882
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Product details
Overview
BAR46AFILM from STMicroelectronics is a high-voltage Schottky rectifier diode in SOT-23 package, designed for SLIC protection during telephone line card insertion. It features 100 V repetitive peak reverse voltage, 150 mA continuous forward current, 0.45 V typical forward voltage at 10 mA, 10 pF junction capacitance at 0 V, and 500 °C/W junction-to-ambient thermal resistance on epoxy board.
For engineers reviewing the BAR46AFILM datasheet, BAR46AFILM pinout, BAR46AFILM application, or BAR46AFILM equivalent, key selection criteria include reverse voltage margin for SLIC surge clamping, low forward voltage for minimal conduction loss, fast switching with negligible recovery time, and SOT-23 footprint compatibility in space-constrained telecom interface circuits.
Technical Context
This Schottky diode operates without minority-carrier storage, delivering near-zero reverse recovery time and enabling reliable transient suppression in analog front-end protection paths. Its 100 V VRRM rating targets overvoltage events during hot-plug insertion of line cards into central office equipment.
The device exhibits temperature-stable leakage: IR ≤ 5 µA at 60 °C and VR = 1.5 V, and ≤ 20 µA at 60 °C and VR = 75 V. Its 0.25 V forward voltage at 0.1 mA supports precision biasing in low-current detection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands repetitive line surges up to 100 V in SLIC protection applications |
| IF | 150 mA - Supports continuous current handling in telecom interface power rails |
| VF @ 10 mA | 0.45 V - Minimizes conduction loss and self-heating under typical operating bias |
| Cj @ 0 V | 10 pF - Enables high-frequency signal integrity in line-side ESD/clamp networks |
| Rth(j-a) | 500 °C/W - Requires careful PCB copper area design for thermal management on epoxy board |
| IR @ 75 V, 25°C | 5 µA - Ensures low leakage during standby operation in high-impedance monitoring paths |
Pinout & Package
SOT-23 plastic surface-mount package (3-pin, standard pinout: anode–cathode–anode for dual configuration; BAR46AFILM is single diode variant with cathode marked by band, pin 1 = anode, pin 2 = cathode, pin 3 = NC per STMicroelectronics mechanical drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward current entry | Connected to protected SLIC output or line side; must route with low-inductance trace |
| Pin 2 (Cathode) | Forward current exit / reverse voltage reference | Tied to system ground or clamp rail; marking band identifies this terminal |
| Pin 3 (NC) | No connection | Internally unconnected; left floating per datasheet; no PCB pad required |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.45 V VF at 10 mA enables <1 mW dissipation in low-bias protection paths |
| Negligible switching losses | Zero reverse recovery charge eliminates ringing and EMI in fast transient clamping |
| Low forward voltage drop | 0.25 V at 0.1 mA supports accurate threshold detection in monitoring circuits |
| Surface mount device | SOT-23 footprint allows automated placement in dense telecom line-card layouts |
Applications
| SLIC Hot-Insert Protection | Telephone Line Interface Clamp |
|---|---|
Use Scenario: Protecting subscriber line interface circuitry during live card insertion into PSTN switch racks. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that diverts surge energy before SLIC ICs are exposed. Use Value: 100 V VRRM and zero recovery time prevent latch-up and damage during 100–200 V insertion transients. | Use Scenario: Bidirectional overvoltage suppression on analog POTS line pairs. IC Role / Device Role / Timing Role: Single-diode Schottky clamp referenced to ground, placed between tip/ring and system ground. Use Value: 10 pF capacitance preserves voice-band signal fidelity while clamping >75 V transients. |
| Low-Power Bias Detection | Telecom Equipment ESD Network |
Use Scenario: Monitoring line presence via low-current forward bias in battery-powered remote terminals. IC Role / Device Role / Timing Role: Precision forward conduction element in microampere-level sensing path. Use Value: 0.25 V VF at 0.1 mA enables stable threshold setting without significant voltage offset. | Use Scenario: Secondary ESD protection stage downstream of TVS diodes in DSL/ISDN line cards. IC Role / Device Role / Timing Role: Low-capacitance, low-VF shunt element absorbing residual fast transients. Use Value: 5 µA leakage at 75 V ensures minimal loading on high-impedance line drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | VRRM = 30 V, IF = 200 mA, VF = 0.32 V @ 10 mA | Lower reverse voltage rating limits use to sub-30 V interfaces | Select only where system transients are limited to <30 V and higher forward current is needed. |
| BAT54C | Dual common-cathode configuration, VRRM = 30 V, Cj = 12 pF @ 0 V | Not a direct replacement due to dual-diode topology and lower VRRM | Use only in new designs requiring dual-channel clamping with shared cathode routing. |
Compared with BAR46AFILM, SBAT54LT1G offers higher current but insufficient reverse margin for SLIC protection, while BAT54C provides dual functionality at reduced voltage capability-neither matches the 100 V / SOT-23 / single-diode combination critical for telecom line-card insertion safety.
Availability
BAR46AFILM is available at Aetrix Electronics and suitable for SLIC protection, telephone line interface clamping, low-power bias detection, and telecom equipment ESD networks requiring stable component supply and consistent SOT-23 packaging.
Supply support for BAR46AFILM 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, digital, and mixed-signal ICs for automotive, industrial, and communications markets.
BAR46AFILM belongs to ST's small-signal Schottky diode product line, engineered specifically for high-reliability analog front-end protection in telecom infrastructure and line-powered equipment.
FAQ
Is BAR46AFILM a single or dual diode?
BAR46AFILM is a single Schottky diode in SOT-23 package. Although the BAR46 series includes dual variants (e.g., BAR46 with two independent diodes), BAR46AFILM is explicitly marked and specified as a single-diode device with pin 3 internally not connected, confirmed by STMicroelectronics' ordering information and mechanical drawings.
What is the maximum soldering temperature and duration for BAR46AFILM?
The maximum soldering temperature for BAR46AFILM is 260 °C for up to 10 seconds, as specified in the Absolute Ratings table. This applies to both wave and reflow soldering processes, provided the thermal profile complies with JEDEC J-STD-020 guidelines for SOT-23 packages.
Does BAR46AFILM have a specified reverse recovery time?
No-BAR46AFILM is a Schottky diode and therefore has no defined reverse recovery time (trr). Its majority-carrier conduction mechanism results in effectively zero reverse recovery charge, eliminating switching-related losses and EMI, as confirmed by ST's "negligible switching losses" feature statement and dynamic characterization data.
Can BAR46AFILM replace BAR46 in existing designs?
Yes-BAR46AFILM is a direct functional and pin-compatible replacement for BAR46 in single-diode configurations. Both share identical electrical specs, SOT-23 package, and marking convention (A46 vs S46), with BAR46AFILM offering enhanced process consistency and tape-and-reel packaging per ST's updated ordering nomenclature.
BAR46AFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Anode
- 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-23-3
BAR46AFILM FAQ
1.How can I place an order for BAR46AFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAR46AFILM 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 BAR46AFILM reliable?
The price and inventory of BAR46AFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAR46AFILM is usually 5 days.
3.What payment methods are accepted for BAR46AFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAR46AFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAR46AFILM?
BAR46AFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAR46AFILM 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 BAR46AFILM?
For technical support, including BAR46AFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAR46AFILM requirements.
6.How does Aetrix verify that BAR46AFILM is sourced from the original manufacturer or authorized distributors?
All BAR46AFILM 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 BAR46AFILM meets industry standards.
7.What is the process for return or replacement of BAR46AFILM?
All BAR46AFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAR46AFILM, 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 BAR46AFILM part is unused and in its original packaging.
Return procedure for BAR46AFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAR46AFILM Tags
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