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STMicroelectronics TMMBAT46FILM
- Part No.:
- TMMBAT46FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-213AA (Glass)
- Datasheet:
-
TMMBAT46FILM.pdf
- Description:
- DIODE SCHOT 100V 150MA MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,231
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Product details
Overview
TMMBAT46FILM from STMicroelectronics is a general-purpose silicon Schottky diode in MINIMELF glass package, featuring 100 V repetitive peak reverse voltage (VRRM), 150 mA forward continuous current (IF), and low 0.45 V forward voltage at 10 mA - optimized for high-efficiency signal rectification and clamping in space-constrained consumer and industrial power rails.
For engineers reviewing the TMMBAT46FILM datasheet, TMMBAT46FILM pinout, TMMBAT46FILM application, or TMMBAT46FILM equivalent, key selection criteria include its 300 °C/W junction-to-leads thermal resistance, 10 pF zero-bias junction capacitance at 1 MHz, and verified surge capability of 750 mA (10 ms), critical for transient-tolerant DC-DC feedback paths and ESD-sensitive signal line protection.
Technical Context
This Schottky diode uses a metal–silicon junction to achieve lower forward voltage drop and faster switching than standard PN diodes, with no minority carrier storage delay. Its 100 V VRRM rating supports use in 48 V and 36 V automotive auxiliary circuits and off-line flyback snubbers.
Thermal design is constrained by its 150 mW power dissipation limit at 80 °C lead temperature and 300 °C/W Rth(j-l), requiring careful PCB copper area allocation. Reverse leakage remains under 5 µA at 60 °C and 10 V VR, enabling stable biasing in precision analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports rectification in 48 V nominal systems with 2× safety margin |
| IF | 150 mA continuous - suitable for low-power logic-level clamping and signal steering |
| VF @ 10 mA | 0.45 V typical - reduces conduction loss in battery-powered sensor nodes |
| IFSM | 750 mA @ 10 ms - handles inrush and ESD-induced surges without failure |
| Cj @ 0 V | 10 pF @ 1 MHz - enables use in <100 MHz RF detector and fast-switching logic clamp circuits |
| Rth(j-l) | 300 °C/W - requires ≥4 mm² 1-oz copper pad for thermal compliance at full IF |
Pinout & Package
MINIMELF (Glass) surface-mount package: 3.4 mm length × 1.6 mm width × 0.45 mm height; cathode marked by ring at one end; weight 0.05 g; RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; must withstand 750 mA surge |
| Cathode | Forward current exit / reverse blocking terminal | Marked by colored ring; ties to reference/ground plane; defines polarity in series-connected clamps |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at low current | 0.25 V @ 0.1 mA - preserves signal integrity in micro-power wake-up detection circuits |
| High VRRM/IF ratio | 100 V / 150 mA - enables compact replacement of larger DO-35 diodes in telecom line cards |
| Fast recovery | No stored charge - eliminates reverse recovery tail in 1–10 MHz switching applications |
| Stable leakage up to 60 °C | ≤5 µA @ 10 V VR - ensures predictable bias current in temperature-varying sensor bridges |
Applications
| USB Port ESD Clamp | DC-DC Feedback Diode |
|---|---|
Use Scenario: Protects USB 2.0 D+ and D− lines from ±8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance (10 pF), low-VF shunt clamp placed between data line and ground. Use Value: Prevents latch-up in USB transceivers while adding <0.5 ns propagation delay due to absence of reverse recovery. | Use Scenario: Provides isolated feedback path from secondary-side optocoupler output to primary-side controller in flyback converters. IC Role / Device Role / Timing Role: Signal-level rectifier delivering clean DC bias to TL431 reference input. Use Value: 0.45 V VF minimizes voltage error across feedback divider, improving output regulation accuracy to ±1.5%. |
| Automotive LIN Bus Terminator | Low-Power Sensor Bias Clamp |
Use Scenario: Terminates LIN bus at slave node with 1 kΩ pull-up to 12 V, clamped to prevent overvoltage during load dump. IC Role / Device Role / Timing Role: Reverse-biased protection diode across LIN transceiver supply pins. Use Value: 100 V VRRM withstands ISO 7637-2 Pulse 5a (75 V/300 ms), avoiding crowbar activation. | Use Scenario: Clamps thermistor bridge output to 3.3 V rail in battery management ICs during cold-start transients. IC Role / Device Role / Timing Role: Anode tied to sensor node, cathode to regulated rail - conducts only during overvoltage events. Use Value: 0.25 V VF at 0.1 mA ensures sub-µA standby leakage, preserving 10-year coin-cell life in IoT sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT46W-7-F (Diodes Inc.) | Same MINIMELF package; VF = 0.55 V @ 10 mA (higher); IFSM = 600 mA | Slightly higher conduction loss limits use in ultra-low-power sensor nodes | Select when cost sensitivity outweighs 100 mV VF penalty and surge margin is adequate |
| 1N5711 (ON Semiconductor) | DO-35 through-hole; VRRM = 70 V; Cj = 4 pF @ 0 V | Lower capacitance suits RF detector use, but 70 V rating excludes 48 V system use | Choose for legacy through-hole designs or HF demodulation where size is secondary |
Compared with BAT46W-7-F and 1N5711, TMMBAT46FILM delivers the optimal balance of high VRRM, low VF, and SMT compatibility for modern compact power management - especially where thermal resistance and surge robustness are prioritized over minimal capacitance.
Availability
TMMBAT46FILM is available at Aetrix Electronics and suitable for USB port protection, DC-DC feedback networks, automotive LIN bus termination, and low-power sensor bias clamping requiring stable component supply across production lifecycles.
Supply support for TMMBAT46FILM 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 silicon solutions for automotive, industrial, and consumer markets since 1987.
TMMBAT46FILM belongs to ST's general-purpose discrete portfolio, engineered for reliability-critical signal conditioning and power rail protection in cost-sensitive, high-volume applications.
FAQ
Is TMMBAT46FILM suitable for 24 V industrial control inputs?
Yes. With 100 V VRRM and 750 mA IFSM, it reliably clamps transients exceeding IEC 61000-4-4 Level 4 (2 kV) on 24 V digital inputs. Its 0.45 V VF ensures minimal voltage drop during normal operation, preserving noise margin in PLC I/O modules.
What is the maximum PCB trace width needed for thermal relief at 150 mA?
A minimum 0.5 mm wide, 1 oz copper trace connected to ≥4 mm² thermal pad meets the 300 °C/W Rth(j-l) requirement at 80 °C ambient. No external heatsink is needed below 100 mA continuous current in still air.
Does TMMBAT46FILM have AEC-Q101 qualification?
No. TMMBAT46FILM is not AEC-Q101 qualified. For automotive applications, it may be used in non-safety-critical subsystems (e.g., infotainment power sequencing) with additional system-level validation, but not in ADAS or powertrain modules requiring certified components.
Can it replace BAT54 in a 3.3 V logic-level shifter?
No. BAT54 has dual/quad configurations and lower capacitance (≈5 pF). TMMBAT46FILM is single-diode only with 10 pF Cj; while electrically functional, its higher capacitance degrades rise/fall times beyond 10 MHz - unsuitable for high-speed I²C or SPI level shifting.
TMMBAT46FILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-213AA (Glass)
- 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:
- Mini MELF
- Operating Temperature - Junction:
- -65°C ~ 125°C
TMMBAT46FILM FAQ
1.How can I place an order for TMMBAT46FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for TMMBAT46FILM 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 TMMBAT46FILM reliable?
The price and inventory of TMMBAT46FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMMBAT46FILM is usually 5 days.
3.What payment methods are accepted for TMMBAT46FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMMBAT46FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMMBAT46FILM?
TMMBAT46FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMMBAT46FILM 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 TMMBAT46FILM?
For technical support, including TMMBAT46FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMMBAT46FILM requirements.
6.How does Aetrix verify that TMMBAT46FILM is sourced from the original manufacturer or authorized distributors?
All TMMBAT46FILM 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 TMMBAT46FILM meets industry standards.
7.What is the process for return or replacement of TMMBAT46FILM?
All TMMBAT46FILM units undergo pre-shipment inspection (PSI). If there is an issue with TMMBAT46FILM, 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 TMMBAT46FILM part is unused and in its original packaging.
Return procedure for TMMBAT46FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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