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STMicroelectronics TMMBAT42FILM
- Part No.:
- TMMBAT42FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-213AA (Glass)
- Datasheet:
-
TMMBAT42FILM.pdf
- Description:
- DIODE SCHOTT 30V 200MA MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:11,452
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Product details
Overview
TMMBAT42FILM from STMicroelectronics is a small-signal Schottky diode optimized for low-loss, high-speed switching in signal routing and clamping applications. It features a 30 V repetitive peak reverse voltage, 200 mA forward continuous current, 0.4 V typical forward voltage at 10 mA, 5 ns reverse recovery time, and MINIMELF surface-mount package - used in USB data line protection and low-voltage logic interface circuits.
For engineers reviewing the TMMBAT42FILM datasheet, TMMBAT42FILM pinout, TMMBAT42FILM application, or TMMBAT42FILM equivalent, key selection criteria include forward voltage at low currents (0.26–0.45 V), leakage current ≤0.5 µA at 25 V, junction capacitance of 7 pF, thermal resistance of 300 °C/W, and compatibility with lead-free reflow profiles up to 260 °C.
Technical Context
This Schottky diode uses a metal-to-silicon junction to achieve negligible switching losses and very low turn-on voltage. Its fast recovery (trr = 5 ns) and low capacitance (C = 7 pF at 1 V) support high-frequency signal integrity in 5 V and 3.3 V digital interfaces.
The integrated ESD protection enables direct placement on I/O lines without external transient suppressors. Rated for operation from –65 °C to +125 °C junction temperature, it supports automotive and industrial environments where thermal cycling and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports reverse blocking in 24 V nominal systems with safety margin |
| IF (continuous) | 200 mA - sufficient for logic-level signal clamping and biasing networks |
| VF @ 10 mA | 0.4 V typ - minimizes voltage drop in low-power sensor interface paths |
| trr | 5 ns - enables reliable operation up to ~35 MHz switching frequencies |
| Cj @ 1 V | 7 pF - preserves signal rise/fall times in high-speed data lines (e.g., USB 2.0) |
| Rth(j-l) | 300 °C/W - requires minimal PCB copper area for thermal management at rated load |
| IR @ 25 V | ≤0.5 µA @ 25 °C - ensures low standby power loss in always-on circuits |
Pinout & Package
MINIMELF (SOD-523) package: ultra-compact surface-mount outline with cathode ring marking; dimensions: 3.5 mm × 1.65 mm × 0.5 mm; RoHS-compliant, ECOPACK®-qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to higher-potential node (e.g., signal source or supply rail) |
| Cathode | Current exit point under forward bias; marked by ring | Connected to lower-potential node (e.g., ground or logic reference) |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.4 V typical at 10 mA - reduces conduction loss in battery-powered sensor nodes |
| Fast switching | 5 ns reverse recovery - prevents signal distortion in 10–50 MHz clock/data lines |
| ESD protection | Integrated per IEC 61000-4-2 Level 4 - eliminates need for discrete TVS in compact I/O designs |
| Thermal robustness | –65 °C to +125 °C operating range - qualified for under-hood automotive and outdoor industrial use |
Applications
| USB 2.0 Data Line Protection | Low-Voltage Logic Level Shifting |
|---|---|
Use Scenario: Bidirectional 480 Mbps data lines exposed to ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Signal clamping diode placed between D+ and D− lines and VDD/GND rails. Use Value: 0.4 V forward drop preserves signal swing; 7 pF capacitance avoids eye diagram degradation. | Use Scenario: Interfacing 1.8 V FPGA I/O to 3.3 V peripheral with bidirectional level translation. IC Role / Device Role / Timing Role: Passive clamping element in resistor-based level shifter topology. Use Value: Sub-0.5 V VF ensures accurate threshold alignment; 5 ns trr maintains timing margins. |
| Automotive Sensor Signal Conditioning | Portable Device Battery Monitoring |
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine control modules. IC Role / Device Role / Timing Role: Reverse-polarity and transient protection diode on sensor output trace. Use Value: 30 V VRRM withstands load-dump transients; –65 °C to +125 °C rating matches under-hood requirements. | Use Scenario: Voltage divider feedback path in Li-ion battery fuel gauge ICs. IC Role / Device Role / Timing Role: Low-leakage biasing diode in precision resistive divider network. Use Value: ≤0.5 µA IR at 25 V ensures <10 nA error current; 0.4 V VF stabilizes reference point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54C,115 (Nexperia) | Higher VF (0.5 V @ 10 mA); dual-common-cathode configuration | Requires layout change for single-diode use; better suited for dual-rail clamping | Select when dual-diode integration reduces board space vs. discrete placement |
| NSR0230HT1G (ON Semiconductor) | Lower IF rating (200 mA same, but derates faster above 85 °C); SOD-323 package | Larger footprint; slightly higher thermal resistance (350 °C/W) | Prefer when existing SOD-323 land pattern must be reused without redesign |
Compared with BAT54C and NSR0230HT1G, TMMBAT42FILM offers the lowest forward voltage at low currents and smallest package (SOD-523), making it optimal for space-constrained, low-power signal integrity applications where thermal headroom is limited.
Availability
TMMBAT42FILM is available at Aetrix Electronics and suitable for USB interface protection, logic level translation, and automotive sensor signal conditioning requiring stable component supply across long-life industrial and automotive programs.
Supply support for TMMBAT42FILM 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.
TMMBAT42FILM belongs to ST's general-purpose Schottky diode product line, engineered specifically for low-voltage, high-speed signal integrity in compact portable and automotive electronics.
FAQ
Is TMMBAT42FILM suitable for 5 V USB 2.0 data line clamping?
Yes. With 0.4 V typical forward voltage at 10 mA and only 7 pF junction capacitance, it clamps transients without distorting the 480 Mbps differential signal. Its 30 V VRRM provides margin against common-mode surges, and the MINIMELF package fits tight pitch layouts near USB connectors.
What is the maximum soldering temperature and duration for TMMBAT42FILM?
The absolute maximum soldering temperature is 260 °C for 15 seconds, per the manufacturer's specification. This aligns with standard lead-free reflow profiles. Exceeding this limit risks delamination or junction damage due to its low thermal mass and plastic package construction.
How does TMMBAT42FILM compare to TMMBAT43FILM in forward voltage?
TMMBAT42FILM has a typical VF of 0.4 V at 10 mA, while TMMBAT43FILM is lower at 0.26–0.33 V under identical conditions. The difference arises from process tuning - TMMBAT43 targets ultra-low-voltage applications like energy harvesting, whereas TMMBAT42 balances low VF with tighter leakage control (≤0.5 µA).
Can TMMBAT42FILM replace BAT54 in an existing SOD-323 design?
No direct replacement: TMMBAT42FILM uses MINIMELF (SOD-523), which is smaller than SOD-323 and incompatible with the same footprint. While electrically similar, mechanical incompatibility requires PCB land pattern revision. For drop-in substitution, consider ST's BAT54 variants in SOD-323.
TMMBAT42FILM 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):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25 V
- Capacitance @ Vr, F:
- 7pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
- Operating Temperature - Junction:
- -65°C ~ 125°C
TMMBAT42FILM FAQ
1.How can I place an order for TMMBAT42FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for TMMBAT42FILM 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 TMMBAT42FILM reliable?
The price and inventory of TMMBAT42FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMMBAT42FILM is usually 5 days.
3.What payment methods are accepted for TMMBAT42FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMMBAT42FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMMBAT42FILM?
TMMBAT42FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMMBAT42FILM 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 TMMBAT42FILM?
For technical support, including TMMBAT42FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMMBAT42FILM requirements.
6.How does Aetrix verify that TMMBAT42FILM is sourced from the original manufacturer or authorized distributors?
All TMMBAT42FILM 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 TMMBAT42FILM meets industry standards.
7.What is the process for return or replacement of TMMBAT42FILM?
All TMMBAT42FILM units undergo pre-shipment inspection (PSI). If there is an issue with TMMBAT42FILM, 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 TMMBAT42FILM part is unused and in its original packaging.
Return procedure for TMMBAT42FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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