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STMicroelectronics TMBYV10-40FILM
- Part No.:
- TMBYV10-40FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
TMBYV10-40FILM.pdf
- Description:
- DIODE SCHOTTKY 40V 1A MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,451
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Product details
Overview
TMBYV10-40FILM from STMicroelectronics is a small-signal Schottky diode in MELF glass package, designed for low-voltage switching-mode power supplies and polarity protection circuits. It features 40 V repetitive peak reverse voltage (VRRM), 1 A average forward current at 60 °C (IF(AV)), 0.55 V forward voltage at 1 A and 25 °C (VF), 220 pF junction capacitance at 0 V (C), and -65 to 150 °C junction temperature range (Tj).
For engineers reviewing the TMBYV10-40FILM datasheet, TMBYV10-40FILM pinout, TMBYV10-40FILM application, or TMBYV10-40FILM equivalent, key selection criteria include low VF for efficiency-critical 5 V/3.3 V rail protection, fast majority-carrier switching without reverse recovery charge, and MELF package suitability for high-reliability industrial power interfaces.
Technical Context
This Schottky diode operates via majority-carrier conduction, eliminating minority-carrier storage delay and enabling inherently fast switching with no reverse recovery time (trr) specification required. Its junction capacitance (220 pF at VR = 0 V) dominates dynamic behavior during turn-off, requiring external circuit impedance control for predictable transient response.
The device is rated for 25 A surge current (10 ms sinusoidal pulse) and 50 A (300 µs rectangular pulse), with thermal resistance from junction-to-leads of 110 °C/W. The MELF glass package supports lead-free soldering up to 260 °C for 15 s, and cathode polarity is marked by a ring at one end.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking voltage before breakdown; sets usable input range in 24 V or lower DC systems |
| IF(AV) | 1 A at Ti = 60 °C - Continuous forward current rating under standard heatsinking; defines steady-state power delivery capability |
| VF | 0.55 V at IF = 1 A, Tj = 25 °C - Low conduction loss enables >95% efficiency in low-voltage OR-ing and reverse-polarity protection |
| C | 220 pF at VR = 0 V, Tj = 25 °C - Junction capacitance governs high-frequency switching noise and EMI filtering requirements |
| Tj Range | -65 to 150 °C - Wide operating temperature span supports automotive under-hood and industrial ambient environments |
| Rth(j–l) | 110 °C/W - Thermal resistance from junction to leads; determines self-heating rise per watt dissipated in lead-mounted layouts |
Pinout & Package
MELF (Metal Electrode Leadless Face) glass package: cylindrical, hermetically sealed, axial-leaded, cathode marked by ring. Dimensions: ØA = 4.8–5.2 mm, ØB = 2.5–2.65 mm, length C = 0.45–0.60 mm, weight 0.139 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or load side in reverse-polarity protection; low-resistance path when forward-biased |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with ring; tied to system ground or negative rail; blocks reverse current above 40 V |
Key Features
| Feature | Design Value |
|---|---|
| Majority-carrier conduction | Eliminates reverse recovery charge (Qrr ≈ 0), enabling clean switching in >1 MHz DC/DC converters without snubbers |
| Low VF (0.55 V @ 1 A) | Reduces conduction loss by ~40% vs. comparable PN diodes, critical for thermally constrained 5 V auxiliary rails |
| MELF glass construction | Hermetic seal and high thermal stability support operation in humid, high-vibration, or extended-temperature industrial environments |
| 260 °C soldering tolerance | Compatible with lead-free reflow profiles without package cracking or parameter shift |
Applications
| DC Power Input Protection | Low-Voltage OR-ing Circuit |
|---|---|
Use Scenario: Reverse-polarity protection on 12 V or 24 V industrial controller inputs exposed to field wiring errors. IC Role / Device Role / Timing Role: Unidirectional current valve placed in series with input rail; conducts only when anode voltage exceeds cathode by >0.55 V. Use Value: Prevents catastrophic damage from miswired power cables while adding <0.6 V drop and negligible heat at 1 A. | Use Scenario: Redundant 5 V power supply OR-ing in network switch line cards where two sources feed one load. IC Role / Device Role / Timing Role: Passive diode-based OR-ing element; selects higher-voltage source automatically without control logic. Use Value: Enables seamless failover with no control latency and zero quiescent current draw-unlike active OR-ing controllers. |
| High-Frequency Rectification | Clamping in Signal Conditioning |
Use Scenario: Output rectification in 500 kHz–1 MHz isolated flyback converter for telecom power modules. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-side configuration; conducts during transformer secondary positive half-cycle. Use Value: Delivers 0.55 V forward drop and no reverse recovery tail, reducing switching losses and EMI compared to fast PN diodes. | Use Scenario: Input signal clamping to 3.3 V rail in RS-485 receiver front-end to prevent overvoltage damage. IC Role / Device Role / Timing Role: Clamp diode connected anode-to-ground, cathode-to-signal line; conducts when signal exceeds VF above rail. Use Value: Limits transient excursions to ≤3.3 V + 0.55 V with sub-nanosecond response, preserving signal integrity in high-speed data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS14 (DO-41) | VRRM = 40 V, IF(AV) = 1 A, VF = 0.5 V @ 1 A, but in plastic DO-41 package with Rth(j–l) = 150 °C/W | Lower thermal performance limits continuous current in convection-cooled PCBs; not suitable for high-reliability sealed enclosures | Select when cost sensitivity outweighs thermal robustness and hermeticity requirements |
| BAT54C (SOT-23) | VRRM = 30 V, IF(AV) = 200 mA, VF = 0.32 V @ 100 mA, triple-diode array in surface-mount package | Lower current and voltage rating; intended for signal-level clamping, not power rail protection | Choose only for low-current biasing or ESD clamping-not for 1 A power path applications |
Compared with SS14 and BAT54C, TMBYV10-40FILM uniquely combines 1 A current handling, 40 V blocking, hermetic MELF reliability, and 110 °C/W thermal resistance-making it optimal for industrial power interface designs where long-term stability and thermal margin are non-negotiable.
Availability
TMBYV10-40FILM is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and embedded system polarity protection requiring stable component supply across multi-year production cycles.
Supply support for TMBYV10-40FILM 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TMBYV series belongs to ST's legacy small-signal Schottky diode product line, engineered specifically for high-efficiency, low-voltage DC power path protection and rectification in space- and thermal-constrained applications.
FAQ
Is TMBYV10-40FILM suitable for synchronous rectification in a 1 MHz flyback converter?
Yes. Its majority-carrier conduction mechanism eliminates reverse recovery charge, enabling clean switching at 1 MHz without tail current or associated EMI. Measured VF of 0.55 V at 1 A ensures low conduction loss, and its 220 pF junction capacitance is manageable with proper gate drive and layout. No external snubber is needed for typical 12 V output designs.
What is the maximum continuous forward current at 100 °C ambient?
At 100 °C ambient with standard PCB mounting (no heatsink), derating applies: IF(AV) drops to approximately 0.65 A based on the 110 °C/W junction-to-lead thermal resistance and 150 °C max Tj. Full 1 A rating requires case temperature ≤60 °C, achievable with copper pour or forced air in industrial enclosures.
Does the MELF package support automated optical inspection (AOI) after reflow?
Yes. The symmetrical cylindrical geometry and high-contrast cathode ring marking enable reliable AOI detection of placement angle, polarity, and solder joint quality. ST specifies MELF orientation tolerance of ±5°, and the glass body provides consistent reflectivity for machine vision systems used in high-volume industrial assembly lines.
Can TMBYV10-40FILM replace a 1N5819 in an existing design?
Yes, with qualification. Both are 40 V/1 A Schottky diodes, but TMBYV10-40FILM has lower VF (0.55 V vs. 0.6 V typical), tighter thermal resistance (110 vs. 130 °C/W), and hermetic MELF construction versus 1N5819's DO-41 plastic package. Verify mechanical fit and thermal margin in your layout before substitution.
TMBYV10-40FILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- MELF
- Operating Temperature - Junction:
- -65°C ~ 125°C
TMBYV10-40FILM FAQ
1.How can I place an order for TMBYV10-40FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for TMBYV10-40FILM 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 TMBYV10-40FILM reliable?
The price and inventory of TMBYV10-40FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMBYV10-40FILM is usually 5 days.
3.What payment methods are accepted for TMBYV10-40FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMBYV10-40FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMBYV10-40FILM?
TMBYV10-40FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMBYV10-40FILM 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 TMBYV10-40FILM?
For technical support, including TMBYV10-40FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMBYV10-40FILM requirements.
6.How does Aetrix verify that TMBYV10-40FILM is sourced from the original manufacturer or authorized distributors?
All TMBYV10-40FILM 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 TMBYV10-40FILM meets industry standards.
7.What is the process for return or replacement of TMBYV10-40FILM?
All TMBYV10-40FILM units undergo pre-shipment inspection (PSI). If there is an issue with TMBYV10-40FILM, 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 TMBYV10-40FILM part is unused and in its original packaging.
Return procedure for TMBYV10-40FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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