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Vishay General Semiconductor - Diodes Division VTVS43ASMF-M3-18
- Part No.:
- VTVS43ASMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS43ASMF-M3-18.pdf
- Description:
- TVS DIODE 43.2VWM 73VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,299
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Product details
Overview
VTVS43ASMF-M3-18 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 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 292 pF typical junction capacitance at 0 V - ideal for protecting USB 2.0, HDMI, and automotive sensor interfaces.
For engineers reviewing the VTVS43ASMF-M3-18 datasheet, VTVS43ASMF-M3-18 pinout, VTVS43ASMF-M3-18 application, or VTVS43ASMF-M3-18 equivalent, key selection criteria include its ±5 % VBR tolerance, IEC 61000-4-2 ±30 kV ESD rating, AEC-Q101 qualification option, low-profile SOD-123W-compatible footprint, and thermal resistance of 20 K/W to lead.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to divert transients above VRWM while maintaining low leakage (<0.05 μA at 43.2 V). Its "Low-Noise" technology ensures sub-nanosecond response time, enabling effective suppression of fast-rising ESD events and inductive switching spikes.
The SMF package provides robust thermal performance (RthJL = 20 K/W) and supports wave and reflow soldering per J-STD-020 MSL level 1. With a maximum junction temperature of +175 °C and halogen-free molding compound, it meets automotive and industrial reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform - sustains high-energy surges without failure) |
| Stand-off Voltage (VRWM) | 43.2 V (maximum continuous reverse voltage before significant leakage) |
| Breakdown Voltage (VBR) | 48.5–53.6 V at IT = 1 mA (±5 % tolerance - defines precise clamping onset) |
| Clamping Voltage (VC) | ≤73 V at IPPM = 5.23 A (limits downstream voltage during surge - protects 48 V logic) |
| Junction Capacitance | 292 pF at VR = 0 V, f = 1 MHz (low enough for USB 2.0 signal integrity, not suitable for USB 3.0+) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 - exceeds Level 4 immunity requirement) |
| Operating Temperature | −55 °C to +175 °C (supports under-hood automotive and industrial ambient conditions) |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount case compatible with SOD-123W footprint; cathode marked by bar on top surface; dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage event |
| Cathode | Protected line connection | Connected to signal/power line being protected; conducts when VR > VBR to clamp voltage |
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 ECUs |
| ±5 % VBR tolerance | Ensures consistent clamping threshold across production lots - critical for tight-margin 48 V systems |
| IEC 61000-4-2 ±30 kV ESD | Eliminates need for secondary ESD protection in front-end interfaces of infotainment and ADAS modules |
| AEC-Q101 qualified variant available | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress testing |
| Halogen-free, MSL level 1 | Enables single-reflow assembly without moisture-related popcorning; complies with RoHS and JEDEC standards |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Node |
|---|---|
|
Use Scenario: Protecting LIN or SENT bus lines in engine control sensors exposed to load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground. Use Value: Clamps transients to ≤73 V while maintaining <0.05 μA leakage at 43.2 V - preserves signal fidelity and prevents microcontroller reset. |
Use Scenario: Surge protection on CAN_H/CAN_L lines in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional protection achieved using two VTVS43ASMF-M3-18 devices back-to-back. Use Value: 400 W capability withstands repetitive 10/1000 μs surges per IEC 61000-4-5; 292 pF avoids CAN bit-rate distortion at 1 Mbps. |
| USB 2.0 Port Protection | 48 V DC Power Rail Clamp |
|
Use Scenario: ESD safeguard for USB data lines (D+/D−) in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS connected from each data line to ground. Use Value: 292 pF capacitance meets USB 2.0 eye diagram requirements; ±30 kV contact discharge rating exceeds USB-IF compliance thresholds. |
Use Scenario: Overvoltage clamping on 48 V auxiliary power rails in telecom base station power supplies. IC Role / Device Role / Timing Role: Primary transient suppressor placed across rail and ground, upstream of DC-DC converters. Use Value: 43.2 V VRWM aligns with 48 V nominal system; 73 V VC limits downstream component stress during ISO 16750-2 load dump events. |
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-E3/57T | Same VRWM (43 V), but SMA package (DO-214AC); higher RthJA (~50 K/W), larger footprint (4.5 × 2.7 mm) | Less suitable for space-constrained automotive PCBs; lower thermal efficiency in high-density layouts | Select if legacy SMA footprint compatibility is required and thermal margin allows |
| TPSMD43A | Same VRWM (43 V), but higher PPPM (600 W); larger SMC package (DO-214AB); 350 pF capacitance | Better for high-energy surges but excessive capacitance degrades high-speed signal integrity | Prefer for industrial power-line protection where speed is secondary to energy handling |
Compared with SMAJ43A-E3/57T and TPSMD43A, VTVS43ASMF-M3-18 offers superior board-space efficiency, lower thermal resistance to lead (20 K/W), and optimized capacitance for mixed-signal interfaces - making it the preferred choice for next-generation automotive and compact industrial designs.
Availability
VTVS43ASMF-M3-18 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN node hardening, USB 2.0 interface safeguarding, and 48 V DC rail clamping requiring stable component supply and long-term lifecycle support.
Supply support for VTVS43ASMF-M3-18 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 TransZorb® eSMP® Series - including VTVS43ASMF-M3-18 - is engineered specifically for robust, low-profile transient suppression in space- and reliability-critical applications such as automotive electronics and industrial control systems.
FAQ
What is the maximum clamping voltage of the VTVS43ASMF-M3-18 under standard test conditions?
The VTVS43ASMF-M3-18 has a maximum reverse clamping voltage (VC) of 73 V when subjected to its rated peak pulse current of 5.23 A using the 10/1000 μs waveform. This value is measured at the device terminals and reflects worst-case voltage seen by downstream circuitry during surge events - critical for ensuring connected ICs remain within absolute maximum ratings.
Is the VTVS43ASMF-M3-18 suitable for bidirectional signal line protection?
No - the VTVS43ASMF-M3-18 is a unidirectional TVS diode, intended for protection of positive-going transients on grounded-return circuits. For bidirectional protection (e.g., RS-485 or CAN), two VTVS43ASMF-M3-18 devices must be connected in series opposition, or a dedicated bidirectional part like VTVS43BSMF-M3-18 should be selected.
Does the VTVS43ASMF-M3-18 meet automotive qualification standards?
The base VTVS43ASMF-M3-18 is not AEC-Q101 qualified, but Vishay offers an AEC-Q101 qualified variant (e.g., VTVS43ASMF-HM3-18) with identical electrical specs and enhanced reliability testing. Engineers designing for automotive applications should specify the HM3 suffix version to ensure compliance with AEC-Q101 stress requirements.
What is the thermal resistance from junction to lead (RthJL) for the VTVS43ASMF-M3-18?
The VTVS43ASMF-M3-18 has a thermal resistance of 20 K/W from junction to lead when mounted on an infinite heat sink. This low RthJL enables efficient heat dissipation during repetitive surge events and supports reliable operation at junction temperatures up to +175 °C - essential for under-hood automotive environments.
How does the 292 pF junction capacitance of the VTVS43ASMF-M3-18 affect high-speed data lines?
The 292 pF typical junction capacitance of the VTVS43ASMF-M3-18 is appropriate for USB 2.0 (480 Mbps) and LIN/Sent interfaces, where signal rise times are relatively slow. However, it exceeds recommended limits for USB 3.0 (>5 Gbps), HDMI 2.0, or PCIe Gen3, where sub-10 pF capacitance is typically required to avoid signal integrity degradation.
VTVS43ASMF-M3-18 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):
- 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-M3-18 FAQ
1.How can I place an order for VTVS43ASMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS43ASMF-M3-18 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 VTVS43ASMF-M3-18 reliable?
The price and inventory of VTVS43ASMF-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VTVS43ASMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS43ASMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS43ASMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS43ASMF-M3-18?
VTVS43ASMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS43ASMF-M3-18 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 VTVS43ASMF-M3-18?
For technical support, including VTVS43ASMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS43ASMF-M3-18 requirements.
6.How does Aetrix verify that VTVS43ASMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS43ASMF-M3-18 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 VTVS43ASMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS43ASMF-M3-18?
All VTVS43ASMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS43ASMF-M3-18, 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 VTVS43ASMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS43ASMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS43ASMF-M3-18 Tags
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