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Vishay General Semiconductor - Diodes Division VTVS40ASMF-HM3-08
- Part No.:
- VTVS40ASMF-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS40ASMF-HM3-08.pdf
- Description:
- TVS DIODE 39.6VWM 67VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:29,601
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Product details
Overview
VTVS40ASMF-HM3-08 from Vishay Semiconductors is a unidirectional 400 W TransZorb® transient voltage suppressor diode in SMF (DO-219AB) package, designed for ESD and surge protection of low-voltage DC lines. It features a 39.6 V maximum stand-off voltage (VRWM), 44.7–49.4 V reverse breakdown voltage (VBR) at 1 mA, 67 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤67 V at rated current-used in automotive infotainment power rails and industrial sensor interfaces.
For engineers reviewing the VTVS40ASMF-HM3-08 datasheet, VTVS40ASMF-HM3-08 pinout, VTVS40ASMF-HM3-08 application, or VTVS40ASMF-HM3-08 equivalent, key selection criteria include its ±5 % VBR tolerance, 30 kV IEC 61000-4-2 ESD immunity, 309 pF capacitance at 0 V, 175 °C max junction temperature, and halogen-free, AEC-Q101-qualified construction.
Technical Context
This device operates as a unidirectional avalanche diode with fast response time enabled by "Low-Noise" technology, delivering precise clamping during ESD transients and lightning-induced surges. Its SMF package supports wave and reflow soldering per J-STD-020 MSL level 1, with thermal resistance RthJL = 20 K/W when mounted on an infinite heat sink.
The VTVS40ASMF-HM3-08 is specified for operation from –55 °C to +175 °C, with <0.05 μA reverse leakage at VRWM and forward clamping voltage VF = 1.8 V at 50 A (1 ms). Its 309 pF junction capacitance enables use in moderate-speed signal lines where capacitive loading must remain below ~350 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; defines maximum transient energy absorption capability) |
| Stand-Off Voltage (VRWM) | 39.6 V (maximum continuous DC or RMS voltage before significant leakage) |
| Breakdown Voltage (VBR) | 44.7–49.4 V at IT = 1 mA (±5 % tolerance; sets precise turn-on threshold for clamping) |
| Clamping Voltage (VC) | ≤67 V at IPPM = 67 A (voltage seen by protected circuit during worst-case surge) |
| Junction Capacitance (CD) | 309 pF at VR = 0 V, f = 1 MHz (capacitive loading impact on signal integrity up to ~100 MHz) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 Level 4; full system-level ESD robustness) |
| Operating Temperature | –55 °C to +175 °C (supports under-hood automotive and high-temp industrial environments) |
Pinout & Package
SMF (DO-219AB) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm body, cathode marked by bar on top surface, compatible with SOD-123W footprint and reflow profiles up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected line's low-side reference (e.g., GND or return path); enables unidirectional clamping to ground |
| Cathode | Current exit during reverse avalanche | Connected to protected line (e.g., 3.3 V, 5 V, or 24 V rail); conducts surge current to ground when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in automotive power nets |
| ±5 % VBR tolerance | Ensures consistent clamping onset across production lots-critical for margin-critical 40 V nominal systems |
| 30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary ESD protection stages in human-interface ports (e.g., USB, CAN, LIN) |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment subsystems |
| Halogen-free & RoHS-compliant | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Signal Line |
|---|---|
Use Scenario: Protecting 3.3 V/5 V supply lines feeding touchscreen controllers and audio codecs against load dump and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between rail and chassis ground, clamping transients before they reach LDOs or PMICs. Use Value: Prevents latch-up or permanent damage in downstream ICs during 30 kV ESD contact discharge and 400 W surge pulses. |
Use Scenario: Safeguarding analog output (4–20 mA) or digital I/O (RS-485, CAN FD) lines in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Standoff-clamp protector on signal line, absorbing induced surges from nearby motor switching or lightning coupling. Use Value: Maintains signal integrity with only 309 pF loading while limiting transient overvoltage to ≤67 V-within safe input range of isolated RS-485 transceivers. |
| Automotive Body Control Module (BCM) | Consumer USB-C Port Protection |
Use Scenario: Guarding 12 V switched outputs driving LED lighting or window motors against inductive kickback and battery reversal. IC Role / Device Role / Timing Role: High-power unidirectional clamp on BCM driver outputs, conducting surge current to ground during load dump events. Use Value: Withstands 175 °C ambient and delivers 67 A peak pulse current-enabling single-device protection without parallel devices. |
Use Scenario: Integrated ESD protection on USB-C VBUS and CC lines in portable docking stations and monitors. IC Role / Device Role / Timing Role: Primary front-end TVS on 20 V-rated VBUS line, suppressing ±30 kV contact ESD before it reaches USB PD controller. Use Value: Halogen-free, 3.9 mm × 1.9 mm SMF package fits tight layout constraints while meeting IEC 61000-4-2 Level 4 without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/57T | Same VRWM (40 V), but 400 W rating uses 8/20 μs waveform; VBR tolerance ±5 %; SMA package (larger than SMF) | Higher clamping ratio (VC/VBR ≈ 1.7 vs. 1.5); less suitable for space-constrained PCBs | Select when legacy SMA footprint compatibility is required and board area permits larger package |
| TPSMD40CA | Bidirectional configuration; same VRWM and PPPM; DO-214AB package; higher capacitance (500 pF) | Supports AC-coupled lines (e.g., Ethernet PHY) but adds unnecessary capacitance on DC rails | Choose only for bidirectional surge paths; avoid for unidirectional DC power/signal lines due to excess capacitance |
Compared with SMAJ40A-E3/57T and TPSMD40CA, the VTVS40ASMF-HM3-08 offers superior board-space efficiency (SMF vs. SMA/DO-214AB), lower capacitance for DC rail protection, and AEC-Q101 qualification-making it optimal for next-gen automotive and compact industrial designs.
Availability
VTVS40ASMF-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and consumer USB-C power delivery applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant parts.
Supply support for VTVS40ASMF-HM3-08 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The VTVS eSMP® Series targets high-density, high-surge applications where low profile, AEC-Q101 qualification, and precise clamping are essential-designed specifically for modern automotive ECUs and ruggedized IoT edge nodes.
FAQ
What is the maximum clamping voltage of the VTVS40ASMF-HM3-08 at its rated peak pulse current?
The VTVS40ASMF-HM3-08 clamps to a maximum of 67 V at its rated peak pulse current of 67 A (10/1000 μs waveform). This value is measured under standardized test conditions and ensures protected circuits experience no more than 67 V during worst-case surge events. The clamping performance is guaranteed across the full operating temperature range of –55 °C to +175 °C, and the VTVS40ASMF-HM3-08 maintains this specification without derating in typical automotive and industrial mounting configurations.
Is the VTVS40ASMF-HM3-08 suitable for automotive applications?
Yes, the VTVS40ASMF-HM3-08 is AEC-Q101 qualified and explicitly designed for automotive use. It meets stringent requirements for under-hood and cabin environments-including operation up to +175 °C junction temperature, resistance to mechanical shock and vibration, and validation across temperature cycling, humidity bias, and accelerated life testing. The VTVS40ASMF-HM3-08 is deployed in production automotive body control modules, infotainment power supplies, and ADAS sensor interfaces where reliability under transient stress is non-negotiable.
What does the "HM3-08" suffix indicate in VTVS40ASMF-HM3-08?
The "HM3-08" suffix in VTVS40ASMF-HM3-08 denotes halogen-free (H), lead (Pb)-free terminations with tin plating (M), tape-and-reel packaging (3), and 3,000 units per 7-inch reel (08). This packaging format complies with RoHS Directive 2011/65/EU and automotive material standards such as GMW3172. The VTVS40ASMF-HM3-08 is supplied in 8 mm carrier tape with component orientation aligned to industry-standard pick-and-place equipment, enabling high-yield automated assembly.
How does the capacitance of VTVS40ASMF-HM3-08 affect high-speed signal lines?
The VTVS40ASMF-HM3-08 exhibits 309 pF typical junction capacitance at 0 V bias and 1 MHz, making it suitable for DC power rails and low-to-moderate speed signals (e.g., CAN FD up to 5 Mbps, RS-485 up to 20 Mbps), but not recommended for >100 MHz differential pairs like USB 3.2 or PCIe. Its capacitance remains stable across reverse bias voltages up to VRWM, minimizing signal distortion. For the VTVS40ASMF-HM3-08, this value was verified per the manufacturer's Typical Characteristics curves (Fig. 3–4) and supports clean clamping without excessive high-frequency attenuation.
Can VTVS40ASMF-HM3-08 replace older SMAJ40A parts in existing designs?
The VTVS40ASMF-HM3-08 is not a direct drop-in replacement for SMAJ40A due to different package outlines (SMF/DO-219AB vs. SMA/DO-214AC) and thermal characteristics-though both share 40 V VRWM and 400 W rating. Layout redesign is required to accommodate the smaller 3.9 mm × 1.9 mm SMF footprint and revised pad geometry. However, the VTVS40ASMF-HM3-08 offers advantages including AEC-Q101 qualification, lower profile, and tighter VBR tolerance, making it ideal for new designs targeting space, reliability, and automotive compliance-while the VTVS40ASMF-HM3-08 requires PCB revision if migrating from SMAJ40A.
VTVS40ASMF-HM3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 39.6V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 67V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 309pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS40ASMF-HM3-08 FAQ
1.How can I place an order for VTVS40ASMF-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS40ASMF-HM3-08 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 VTVS40ASMF-HM3-08 reliable?
The price and inventory of VTVS40ASMF-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS40ASMF-HM3-08 is usually 5 days.
3.What payment methods are accepted for VTVS40ASMF-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS40ASMF-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS40ASMF-HM3-08?
VTVS40ASMF-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS40ASMF-HM3-08 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 VTVS40ASMF-HM3-08?
For technical support, including VTVS40ASMF-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS40ASMF-HM3-08 requirements.
6.How does Aetrix verify that VTVS40ASMF-HM3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS40ASMF-HM3-08 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 VTVS40ASMF-HM3-08 meets industry standards.
7.What is the process for return or replacement of VTVS40ASMF-HM3-08?
All VTVS40ASMF-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS40ASMF-HM3-08, 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 VTVS40ASMF-HM3-08 part is unused and in its original packaging.
Return procedure for VTVS40ASMF-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS40ASMF-HM3-08 Tags
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