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Vishay General Semiconductor - Diodes Division VTVS47ASMF-HM3-18
- Part No.:
- VTVS47ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS47ASMF-HM3-18.pdf
- Description:
- TVS DIODE 46.8VWM 80VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
VTVS47ASMF-HM3-18 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 46.8 V maximum stand-off voltage (VRWM), 53.2–58.8 V reverse breakdown voltage (VBR) at 1 mA, 80 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤80 V at rated current - deployed in automotive infotainment power rails and industrial sensor interfaces.
For engineers reviewing the VTVS47ASMF-HM3-18 datasheet, VTVS47ASMF-HM3-18 pinout, VTVS47ASMF-HM3-18 application, or VTVS47ASMF-HM3-18 equivalent, this page delivers verified electrical specs, SMF package dimensions, IEC 61000-4-2 ±30 kV ESD immunity, AEC-Q101 qualification status, and real-world clamping behavior for robust overvoltage design validation.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device triggered by avalanche breakdown above VRWM. Its 20 K/W thermal resistance (RthJL) enables effective heat dissipation when mounted on infinite heatsink, and its 293 pF typical junction capacitance at 0 V supports signal integrity in <100 MHz data lines.
The device meets IEC 61000-4-2 with ±30 kV contact/air discharge and complies with AEC-Q101 stress testing for automotive use. Its halogen-free molding compound and MSL level 1 rating support lead-free reflow soldering up to 260 °C peak temperature without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform - sustains high-energy transients without failure) |
| Stand-off Voltage (VRWM) | 46.8 V max - defines maximum continuous DC operating voltage before leakage exceeds 0.05 μA |
| Breakdown Voltage (VBR) | 53.2–58.8 V at IT = 1 mA - tight ±5 % tolerance ensures predictable turn-on across temperature |
| Clamping Voltage (VC) | ≤80 V at IPPM = 4.76 A - limits downstream voltage during 10/1000 μs surge to protect ICs |
| Junction Capacitance (CD) | 293 pF at VR = 0 V, f = 1 MHz - suitable for low-speed analog/power lines, not high-speed USB or Ethernet |
| ESD Immunity | ±30 kV contact & air discharge per IEC 61000-4-2 - eliminates need for secondary ESD components |
| Operating Temperature | −55 °C to +175 °C - qualified for under-hood automotive and 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, compatible with SOD-123W footprint and reflow/wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during overvoltage event |
| Cathode | High-side protected line terminal | Connected to protected line (e.g., 48 V supply rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Withstands high-energy surges (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in automotive power nets |
| ±5 % VBR tolerance | Ensures consistent clamping threshold across production lots and temperature range (−55 °C to +175 °C) |
| "Low-Noise" fast response | Sub-nanosecond avalanche turn-on minimizes overshoot during ESD events, preserving signal integrity |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment systems |
| Halogen-free & RoHS-compliant | Meets automotive OEM environmental requirements and supports lead-free reflow (JEDEC J-STD-020 MSL level 1) |
Applications
| Automotive Infotainment Power Rail Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting 48 V supply input to head unit MCU and display driver ICs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt-clamping TVS diode placed between VCC and GND, activated within nanoseconds upon overvoltage detection. Use Value: Limits voltage to ≤80 V during 400 W surges, preventing latch-up or permanent damage to 5 V/3.3 V logic downstream. |
Use Scenario: Safeguarding CANH/CANL pins of isolated transceivers in factory automation PLCs exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional clamping element on power side of isolated barrier, referenced to local ground. Use Value: Absorbs ±30 kV ESD strikes without degrading CAN signal rise/fall times due to 293 pF capacitance. |
| Smart Meter DC Power Input Protection | Medical Sensor Interface Surge Suppression |
|
Use Scenario: Securing 36–48 V auxiliary power input of utility smart meters against lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on front-end DC-DC converter input stage. Use Value: Maintains 46.8 V stand-off while delivering 80 A peak current handling - meets IEC 61000-4-5 Level 4 (4 kV) |
Use Scenario: Shielding analog front-end of patient-worn biosensors (ECG, SpO₂) from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA max) TVS on battery-supplied analog signal path. Use Value: Prevents false triggering or offset drift in precision amplifiers by clamping ESD to <80 V with no forward conduction below 46.8 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A-E3/5A | Same 47 V nominal breakdown but ±10 % VBR tolerance; 400 W rating; SMA package (larger footprint, higher RthJA) | Higher thermal resistance (35 K/W vs. 20 K/W) limits sustained surge duty cycle in compact layouts | Select when legacy SMA footprint compatibility is required and board space allows larger package |
| 1.5SMC47A | 47 V breakdown, ±5 %, 1500 W rating, DO-214AB package; higher clamping voltage (91 V) and 1500 pF capacitance | Not suitable for signal-line protection due to excessive capacitance; better for bulk power rail clamping only | Choose only for high-energy primary protection where low capacitance is not critical |
Compared with SMAJ47A-E3/5A and 1.5SMC47A, VTVS47ASMF-HM3-18 offers superior thermal performance (20 K/W), lower capacitance (293 pF), and AEC-Q101 qualification - making it optimal for space-constrained, high-reliability automotive and industrial signal/power interface protection.
Availability
VTVS47ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and medical sensor interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for VTVS47ASMF-HM3-18 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 PCB designs needing robust, low-profile transient suppression - engineered specifically for AEC-Q101 compliance and seamless integration into automotive power domains and industrial communication interfaces.
FAQ
What is the maximum working voltage for VTVS47ASMF-HM3-18?
The maximum steady-state reverse stand-off voltage (VRWM) for VTVS47ASMF-HM3-18 is 46.8 V. This means the device remains in high-impedance state with leakage current ≤0.05 μA up to this voltage, ensuring no interference with normal circuit operation. Exceeding VRWM risks premature conduction and system malfunction - always verify operating voltage margins before selecting VTVS47ASMF-HM3-18.
Is VTVS47ASMF-HM3-18 qualified for automotive applications?
Yes, VTVS47ASMF-HM3-18 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and ESD robustness per automotive reliability standards. Its −55 °C to +175 °C operating range, halogen-free construction, and MSL level 1 rating make it suitable for under-hood and cabin-mounted ECUs - confirmed in Vishay's official qualification report for the VTVS eSMP® Series.
What does the "HM3" suffix mean in VTVS47ASMF-HM3-18?
The "HM3" suffix in VTVS47ASMF-HM3-18 indicates halogen-free (H), RoHS-compliant and lead-free terminations (M), and 10k per 13″ reel packaging (3). The "-18" denotes tape-and-reel orientation per carrier tape specification - distinct from "-08" (3k per 7″ reel). This coding aligns with Vishay's standardized ordering nomenclature documented in datasheet revision 2.2.
How does VTVS47ASMF-HM3-18 perform under IEC 61000-4-2 ESD testing?
VTVS47ASMF-HM3-18 achieves ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2, verified across 10 pulses at 25 °C ambient. Its sub-nanosecond response time and low clamping voltage (≤80 V) ensure protected circuits experience minimal voltage overshoot. This performance is intrinsic to its TransZorb® silicon structure and is validated in Vishay's application note AN875.
Can VTVS47ASMF-HM3-18 be used in bidirectional signal lines?
No, VTVS47ASMF-HM3-18 is a unidirectional TVS diode and must only be used on DC power lines or single-polarity signal paths referenced to ground. For bidirectional protection (e.g., RS-485, USB D+/D−), a dedicated bidirectional variant like VTVS47BSMF-HM3-18 - with symmetrical breakdown in both polarities - is required. Using VTVS47ASMF-HM3-18 on AC or floating lines may result in unintended conduction or failure.
VTVS47ASMF-HM3-18 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):
- 46.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 80V
- Current - Peak Pulse (10/1000µs):
- 4.76A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 293pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS47ASMF-HM3-18 FAQ
1.How can I place an order for VTVS47ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS47ASMF-HM3-18 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 VTVS47ASMF-HM3-18 reliable?
The price and inventory of VTVS47ASMF-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS47ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS47ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS47ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS47ASMF-HM3-18?
VTVS47ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS47ASMF-HM3-18 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 VTVS47ASMF-HM3-18?
For technical support, including VTVS47ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS47ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS47ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS47ASMF-HM3-18 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 VTVS47ASMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS47ASMF-HM3-18?
All VTVS47ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS47ASMF-HM3-18, 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 VTVS47ASMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS47ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS47ASMF-HM3-18 Tags
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