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Vishay General Semiconductor - Diodes Division VTVS43ASMF-M3-08
- Part No.:
- VTVS43ASMF-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS43ASMF-M3-08.pdf
- Description:
- TVS DIODE 43.2VWM 73VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,849
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Product details
Overview
VTVS43ASMF-M3-08 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 43.2 V stand-off voltage (VRWM), 48.5–53.6 V reverse breakdown voltage (VBR at IT = 1 mA), and clamps to ≤73 V at 5.23 A peak pulse current (10/1000 μs), with ±5 % VBR tolerance and 292 pF typical junction capacitance at 0 V.
For engineers reviewing the VTVS43ASMF-M3-08 datasheet, VTVS43ASMF-M3-08 pinout, VTVS43ASMF-M3-08 application, or VTVS43ASMF-M3-08 equivalent, this device serves as a robust, AEC-Q101-qualified option for automotive infotainment power rails, industrial sensor I/O protection, and USB 2.0 data line ESD hardening where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
This TVS diode operates in avalanche mode to clamp transients above its breakdown threshold while maintaining low leakage (<0.05 μA at VRWM). Its unidirectional polarity enables protection of positive-rail-only circuits without reverse conduction path concerns.
The SMF package delivers thermal resistance of 20 K/W (junction-to-lead, infinite heat sink), supports wave and reflow soldering up to 260 °C peak, and meets IEC 61000-4-2 with ±30 kV contact/air discharge immunity - enabling direct integration into space-constrained, high-reliability PCB layouts.
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) | 43.2 V (maximum continuous DC operating voltage before significant leakage) |
| Breakdown Voltage (VBR) | 48.5–53.6 V at IT = 1 mA (±5 % tolerance; sets precise clamping onset threshold) |
| Clamping Voltage (VC) | ≤73 V at IPPM = 5.23 A (actual voltage seen by protected circuit during worst-case surge) |
| Junction Capacitance | 292 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 signal integrity; avoids data distortion) |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 (meets automotive and industrial immunity requirements) |
| Operating Temperature | −55 °C to +175 °C (supports under-hood automotive and industrial ambient conditions) |
| Package | SMF (DO-219AB); 3.9 × 1.9 × 1.08 mm; halogen-free, MSL level 1, RoHS-compliant |
Pinout & Package
SMF (DO-219AB) is a surface-mount, low-profile, two-terminal package with cathode marked by a bar on the top surface. The device has no internal leads or multiple pins - it functions as a single bidirectional-capable (unidirectional) protection element between anode and cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference terminal for unidirectional clamping | Connected to ground or low-side return path; defines directionality of protection |
| Cathode | Transient input terminal | Marked with bar; connected to protected line (e.g., 43 V rail or signal line); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 43 V supply rails |
| ±5 % VBR tolerance | Ensures tight clamping window across production lots - critical for margin-sensitive 48 V automotive systems |
| 292 pF junction capacitance | Preserves signal integrity on medium-speed interfaces (e.g., CAN FD, LIN, RS-485) without added jitter |
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock testing |
| Low-profile SMF package | Reduces board area vs. SMA/SMB; compatible with SOD-123W footprint for layout reuse |
| "Low-Noise" fast response | Sub-nanosecond turn-on time prevents transient propagation into downstream ICs like MCUs or ADCs |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 43 V DC power input to head unit display modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly at connector entry point to shunt surge energy to chassis ground. Use Value: Clamps transients to ≤73 V within nanoseconds, preventing damage to buck converters and PMICs rated for 45 V max input. |
Use Scenario: Safeguarding analog output (4–20 mA) or digital I/O (RS-485) lines of pressure/temperature sensors in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-mode protector mounted adjacent to connector, absorbing ESD events and induced lightning surges. Use Value: 292 pF capacitance avoids loading effects on 100 kHz bandwidth signals; −55 °C to +175 °C rating ensures operation inside sealed enclosures. |
| USB 2.0 Data Line ESD Hardening | 48 V Telecom PoE Interface |
|
Use Scenario: Adding secondary ESD protection on D+ and D− lines downstream of integrated USB transceivers in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-capacitance TVS placed in series with data path to limit voltage excursion without degrading eye diagram. Use Value: 292 pF capacitance and <1 ns response preserve USB 2.0 full-speed (12 Mbps) signal fidelity while passing ±30 kV IEC 61000-4-2. |
Use Scenario: Protecting powered device (PD) interface on 48 V Power over Ethernet (PoE) injectors and splitters compliant with IEEE 802.3af/at. IC Role / Device Role / Timing Role: Primary surge clamp on DC input side, coordinated with upstream MOVs and current-limiting resistors. Use Value: 43.2 V VRWM matches PoE Class 4–5 operating range; 400 W rating handles 10/1000 μs surges per IEC 61000-4-5 Ed. 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Higher clamping voltage (VC = 69.4 V @ 5.8 A); SMA package (larger footprint, 4.5 × 2.7 mm) | Less suitable for space-constrained 48 V PD designs; lower thermal resistance (15 K/W) but higher VC reduces system margin | Select when board area allows larger package and tighter clamping is not required |
| TPSMD43A | Same VRWM (43 V), but ±10 % VBR tolerance (vs. ±5 %); 320 pF capacitance; DO-214AB package | Higher capacitance may degrade USB 2.0 signal integrity; looser VBR tolerance increases risk of premature conduction in precision 43 V rails | Prefer only if cost sensitivity outweighs performance and footprint requirements |
Compared with SMAJ43A and TPSMD43A, VTVS43ASMF-M3-08 offers superior clamping precision (±5 % VBR), lower capacitance (292 pF), and smallest footprint (DO-219AB), making it optimal for high-density automotive and industrial designs demanding strict voltage margins and signal integrity.
Availability
VTVS43ASMF-M3-08 is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor I/O protection, and USB 2.0 data line ESD hardening requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified assurance.
Supply support for VTVS43ASMF-M3-08 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 compact, high-power transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, low-profile mounting, and repeatable clamping performance across temperature and lifetime.
FAQ
What is the maximum clamping voltage of VTVS43ASMF-M3-08 under standard test conditions?
The VTVS43ASMF-M3-08 exhibits a maximum reverse clamping voltage (VC) of 73 V when subjected to a 10/1000 μs peak pulse current of 5.23 A. This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during a standardized surge event - critical for verifying compatibility with downstream IC voltage ratings.
Is VTVS43ASMF-M3-08 qualified for automotive applications?
Yes, VTVS43ASMF-M3-08 is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock. Its −55 °C to +175 °C operating range and robust surge handling make it suitable for engine control units, body electronics, and infotainment systems where reliability under thermal and electrical stress is mandatory.
What does the "-M3-08" suffix indicate in VTVS43ASMF-M3-08?
The "-M3-08" suffix denotes tape-and-reel packaging: "M3" specifies lead (Pb)-free, RoHS-compliant tin-plated terminations, and "-08" indicates 3,000 units per 7-inch reel with 8 mm tape width. This packaging format supports automated SMT placement and meets standard logistics requirements for high-volume manufacturing.
How does the junction capacitance of VTVS43ASMF-M3-08 affect high-speed signal lines?
With a typical junction capacitance of 292 pF at 0 V, the VTVS43ASMF-M3-08 introduces minimal loading on medium-speed interfaces such as RS-485, CAN FD, or USB 2.0 full-speed (12 Mbps). Its low capacitance preserves signal rise/fall times and eye opening, unlike higher-capacitance alternatives that may cause data corruption or timing violations.
Can VTVS43ASMF-M3-08 be used in bidirectional protection configurations?
No - VTVS43ASMF-M3-08 is a unidirectional TVS diode, optimized for clamping positive transients on grounded-return circuits. For bidirectional protection (e.g., AC lines or differential pairs), a dedicated bidirectional part such as VTVS43BSMF-M3-08 or back-to-back configuration would be required; using this device in reverse-biased mode risks permanent breakdown.
VTVS43ASMF-M3-08 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):
- 43.2V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 73V
- Current - Peak Pulse (10/1000µs):
- 5.23A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 292pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS43ASMF-M3-08 FAQ
1.How can I place an order for VTVS43ASMF-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS43ASMF-M3-08 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 VTVS43ASMF-M3-08 reliable?
The price and inventory of VTVS43ASMF-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS43ASMF-M3-08 is usually 5 days.
3.What payment methods are accepted for VTVS43ASMF-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS43ASMF-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS43ASMF-M3-08?
VTVS43ASMF-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS43ASMF-M3-08 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 VTVS43ASMF-M3-08?
For technical support, including VTVS43ASMF-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS43ASMF-M3-08 requirements.
6.How does Aetrix verify that VTVS43ASMF-M3-08 is sourced from the original manufacturer or authorized distributors?
All VTVS43ASMF-M3-08 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 VTVS43ASMF-M3-08 meets industry standards.
7.What is the process for return or replacement of VTVS43ASMF-M3-08?
All VTVS43ASMF-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS43ASMF-M3-08, 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 VTVS43ASMF-M3-08 part is unused and in its original packaging.
Return procedure for VTVS43ASMF-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS43ASMF-M3-08 Tags
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