My Inquiry
My Account
Vishay General Semiconductor - Diodes Division VTVS43ASMF-HM3-18
- Part No.:
- VTVS43ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS43ASMF-HM3-18.pdf
- Description:
- TVS DIODE 43.2VWM 73VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VTVS43ASMF-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 43.2 V stand-off voltage (VRWM), 48.5–53.6 V reverse breakdown voltage (VBR) at 1 mA, and clamps to ≤73 V at 5.23 A peak pulse current (10/1000 μs), with ±30 kV IEC 61000-4-2 contact/air discharge rating - deployed in automotive infotainment power rails and industrial sensor interfaces.
For engineers reviewing the VTVS43ASMF-HM3-18 datasheet, VTVS43ASMF-HM3-18 pinout, VTVS43ASMF-HM3-18 application, or VTVS43ASMF-HM3-18 equivalent, key selection criteria include its 73 V clamping voltage at 5.23 A, 292 pF capacitance at 0 V, 175 °C max junction temperature, halogen-free SOD-123W-compatible SMF package, and AEC-Q101 qualification status.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when transient voltage exceeds its 43.2 V working threshold. Its low-noise fast-response architecture achieves sub-nanosecond turn-on, enabling effective suppression of ESD events and lightning-induced surges on 3.3–48 V supply lines.
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 MSL level 1 per J-STD-020 - ensuring robust manufacturability in high-reliability automotive and industrial PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform; sustains short-duration transients without failure) |
| Stand-off Voltage (VRWM) | 43.2 V (maximum continuous DC operating voltage before conduction begins) |
| Breakdown Voltage (VBR) | 48.5–53.6 V at 1 mA (tight ±5 % tolerance ensures predictable trigger point) |
| Clamping Voltage (VC) | ≤73 V at IPPM = 5.23 A (limits downstream IC voltage stress during surge) |
| Capacitance (CD) | 292 pF at 0 V, 1 MHz (low enough for USB 2.0 and CAN FD signal line compatibility) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 Level 4; eliminates need for secondary ESD stages) |
| Junction Temp. Range | −55 °C to +175 °C (supports under-hood automotive and industrial ambient conditions) |
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 profiles (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 48 V rail); conducts avalanche current when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles IEC 61000-4-5 surge currents up to 5.23 A without degradation |
| ±5 % VBR tolerance | Ensures consistent clamping onset across production lots for reliable system-level margining |
| Low-profile SMF package | Enables placement near connectors or IC pins with minimal board area (3.9 × 1.9 mm) |
| AEC-Q101 qualified | Validated for automotive applications including infotainment power supplies and body control modules |
| Halogen-free & RoHS-compliant | Meets automotive OEM environmental requirements and simplifies end-of-life compliance reporting |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 48 V supply input to head unit MCU and display driver ICs against load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground, clamping transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in 40 V-rated PMICs by limiting voltage to ≤73 V during 5.23 A surges. |
Use Scenario: Shielding RS-485 transceiver data lines and 24 V auxiliary power in factory automation sensors. IC Role / Device Role / Timing Role: Standoff-mode protector on VCC line; activates only during >43.2 V overvoltage events. Use Value: Maintains signal integrity with 292 pF capacitance while surviving repeated ±30 kV ESD strikes per IEC 61000-4-2. |
| Telecom PoE Midspan Port | Medical Diagnostic Equipment Power Input |
|
Use Scenario: Secondary surge protection on 48 V DC input of PoE midspan injectors after primary MOV stage. IC Role / Device Role / Timing Role: Fast-clamping device responding ahead of slower thermal protectors to limit let-through energy. Use Value: Reduces peak voltage seen by DC-DC controller ICs from >100 V to ≤73 V, improving long-term reliability. |
Use Scenario: Safeguarding isolated 48 V medical imaging subsystem power inputs against ESD from operator handling. IC Role / Device Role / Timing Role: Unidirectional transient suppressor mounted at board edge, referenced to safety ground. Use Value: Achieves Class B immunity per IEC 60601-1-2 with no derating required up to 175 °C junction temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Higher clamping voltage (77.4 V at 5.1 A); SMB package (4.6 × 3.6 mm) | Less suitable for space-constrained 48 V rail designs due to 2.3× larger footprint | Select VTVS43ASMF-HM3-18 when board area is limited and tighter clamping is required. |
| TPSMD43A | Same 43 V VRWM but ±10 % VBR tolerance; 200 W Pppm rating | Lower surge handling capacity limits use in high-energy environments like automotive load dump | Choose VTVS43ASMF-HM3-18 for AEC-Q101-compliant 400 W surge resilience in harsh environments. |
Compared with SMBJ43A and TPSMD43A, the VTVS43ASMF-HM3-18 delivers superior clamping performance (73 V vs. ≥77 V), smaller SMF footprint (3.9 × 1.9 mm), and full AEC-Q101 qualification - making it optimal for next-gen automotive and industrial 48 V systems demanding compact, high-reliability protection.
Availability
VTVS43ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor interfaces, and telecom PoE midspan applications requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for VTVS43ASMF-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, and optoelectronics for automotive, industrial, and computing markets.
The VTVS eSMP® series targets compact, high-power transient suppression in space-constrained and thermally demanding applications - engineered specifically for AEC-Q101 compliance and seamless integration into modern 12–48 V power architectures.
FAQ
What is the maximum clamping voltage of the VTVS43ASMF-HM3-18 at its rated peak pulse current?
The VTVS43ASMF-HM3-18 has a maximum reverse clamping voltage (VC) of 73 V when subjected to its rated peak pulse current of 5.23 A (10/1000 μs waveform). This value is measured per the standard test condition defined in Vishay's datasheet document 85891, ensuring predictable overvoltage limiting for downstream components such as PMICs or microcontrollers connected to 43.2 V supply rails.
Is the VTVS43ASMF-HM3-18 qualified for automotive applications?
Yes, the VTVS43ASMF-HM3-18 is AEC-Q101 qualified, confirming its suitability for automotive applications including infotainment power supplies, body control modules, and ADAS sensor interfaces. The qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - all validated per the VTVS43ASMF-HM3-18's specific construction and SMF (DO-219AB) package.
What is the capacitance of the VTVS43ASMF-HM3-18 and how does it affect signal integrity?
The VTVS43ASMF-HM3-18 exhibits a typical capacitance of 292 pF at 0 V and 1 MHz. This value is low enough to avoid significant signal distortion on moderate-speed digital lines (e.g., RS-485, CAN FD, or USB 2.0 power lines), while still providing effective transient suppression - confirmed by Vishay's characterization in Figure 3 of document 85891.
Does the VTVS43ASMF-HM3-18 meet IEC 61000-4-2 ESD immunity standards?
Yes, the VTVS43ASMF-HM3-18 provides ±30 kV contact discharge and ±30 kV air discharge protection per IEC 61000-4-2 Level 4. This performance is intrinsic to its "Low-Noise" fast-response technology and is verified in Vishay's qualification testing - eliminating the need for additional ESD protection stages in most 48 V system designs.
What package type does the VTVS43ASMF-HM3-18 use, and is it compatible with standard SMT processes?
The VTVS43ASMF-HM3-18 uses the SMF (DO-219AB) package - a halogen-free, low-profile surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with standard reflow soldering (peak 260 °C) and wave soldering, and its footprint aligns with SOD-123W, enabling drop-in replacement in existing layouts without redesign.
VTVS43ASMF-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):
- 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:
- -
- Capacitance @ Frequency:
- 292pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS43ASMF-HM3-18 FAQ
1.How can I place an order for VTVS43ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS43ASMF-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 VTVS43ASMF-HM3-18 reliable?
The price and inventory of VTVS43ASMF-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 VTVS43ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS43ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS43ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS43ASMF-HM3-18?
VTVS43ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS43ASMF-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 VTVS43ASMF-HM3-18?
For technical support, including VTVS43ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS43ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS43ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS43ASMF-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 VTVS43ASMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS43ASMF-HM3-18?
All VTVS43ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS43ASMF-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 VTVS43ASMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS43ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS43ASMF-HM3-18 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
