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Vishay General Semiconductor - Diodes Division VTVS25ASMF-HM3-18
- Part No.:
- VTVS25ASMF-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS25ASMF-HM3-18.pdf
- Description:
- TVS DIODE 25.2VWM 42VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,066
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Product details
Overview
VTVS25ASMF-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 25.2 V stand-off voltage (VRWM), 28.5–31.5 V reverse breakdown voltage (VBR) at 1 mA, 42 A peak pulse current (IPPM), 42 V maximum clamping voltage (VC) at IPPM, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment power rails and USB-C port protection.
For engineers reviewing the VTVS25ASMF-HM3-18 datasheet, VTVS25ASMF-HM3-18 pinout, VTVS25ASMF-HM3-18 application, or VTVS25ASMF-HM3-18 equivalent, this page delivers verified electrical specs, SMF package dimensions, clamping performance under 10/1000 μs transients, halogen-free compliance, and AEC-Q101 qualification status - critical for automotive-grade board-level ESD hardening and I/O line robustness validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp with fast response enabled by "Low-Noise" silicon technology, delivering sub-nanosecond turn-on to limit voltage overshoot during ESD events. Its 1.08 mm height and SOD-123W-compatible SMF (DO-219AB) footprint supports high-density PCB layouts while maintaining 20 K/W thermal resistance to infinite heat sink.
The device sustains 175 °C maximum junction temperature and is rated for ±30 kV contact/air discharge per IEC 61000-4-2. Its 433 pF typical capacitance at 0 V enables use on data lines up to ~100 Mbps without signal integrity degradation, provided VRWM margin accommodates system operating voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform) - handles automotive load-dump surges and industrial switching transients without failure |
| Stand-off Voltage (VRWM) | 25.2 V max - sets minimum system operating voltage margin before leakage increases above 0.05 μA |
| Breakdown Voltage (VBR) | 28.5–31.5 V at IT = 1 mA - defines precise clamping onset threshold for overvoltage detection circuits |
| Clamping Voltage (VC) | 42 V at IPPM = 9.07 A - limits downstream IC voltage stress during worst-case 10/1000 μs surge |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - meets Level 4 immunity for exposed connectors and buttons |
| Capacitance | 433 pF at VR = 0 V, f = 1 MHz - compatible with USB 2.0 and CAN FD bus lines when placed post-filter |
| Package | SMF (DO-219AB) - surface-mount, low-profile (1.08 mm height), wave/reflow solderable, MSL level 1 |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and cabin applications requiring reliability across -55 °C to +175 °C |
Pinout & Package
SMF (DO-219AB) package: 2-terminal unidirectional TVS diode with cathode marked by bar on top surface. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H); recommended footprint: 2.9 mm × 1.4 mm pad length/width with 1.3 mm spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground plane; establishes reference for clamping action during positive transients |
| Cathode | Protected line terminal | Connected to protected signal/power line; conducts avalanche current to ground when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems |
| ±5 % VBR tolerance (A-suffix) | Ensures predictable clamping window across production lots - critical for tight-margin 24 V industrial sensors |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JIS C 0950; supports green manufacturing and end-of-life recycling |
| Low-profile SMF package | Reduces board space vs. SMA/SMB; maintains mechanical robustness under thermal cycling in engine control units |
| "Low-Noise" fast response | Sub-1 ns turn-on time minimizes voltage overshoot on high-speed interfaces like LVDS and MIPI D-PHY |
| MSL level 1 rating | Allows unlimited floor life and standard reflow profiles without baking - simplifies SMT line logistics |
Applications
| Automotive Infotainment Power Rail | USB-C Port ESD Protection |
|---|---|
Use Scenario: Protecting 24 V supply input to head unit display modules from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing 400 W surges to hold rail voltage below 42 V for downstream PMICs and SoCs. Use Value: Prevents latch-up and permanent damage in display driver ICs during ISO 16750-2 tests without adding bulk capacitance. |
Use Scenario: Safeguarding USB-C CC and VBUS pins against human-body-model ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Fast-response transient suppressor limiting CC line voltage to ≤42 V during ±30 kV contact discharge. Use Value: Maintains USB PD negotiation integrity and avoids false disconnect detection caused by ESD-induced logic glitches. |
| Industrial PLC Digital Input | Automotive Body Control Module (BCM) |
Use Scenario: Shielding 24 V digital input channels from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting transient energy to ground within nanoseconds to prevent microcontroller reset. Use Value: Eliminates need for external RC snubbers while sustaining >100,000 surge cycles per IEC 61000-4-5 Class 3. |
Use Scenario: Clamping 12 V battery line transients in door module ECUs exposed to alternator ripple and ignition noise. IC Role / Device Role / Timing Role: Primary overvoltage protector on power entry, coordinated with upstream fuse and downstream LDO. Use Value: Enables AEC-Q101-compliant design without derating - validated for 175 °C junction operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W same), higher VC = 38.9 V at 9.3 A, SMA package (2.5 mm height) | Less suitable for ultra-low-profile designs; higher thermal resistance (35 K/W) reduces surge endurance | Select when legacy SMA footprint compatibility is required and board height >2.5 mm is acceptable |
| TPSMD24A | Same SMF package, tighter VBR tolerance (±3.5 %), lower VC = 38.5 V at 9.2 A, no AEC-Q101 qualification | Lacks automotive qualification; not recommended for safety-critical BCM or ADAS subsystems | Prefer for cost-sensitive industrial controls where AEC-Q101 is not mandated |
Compared with SMAJ24A-E3/57T and TPSMD24A, VTVS25ASMF-HM3-18 offers AEC-Q101 qualification, lower profile (1.08 mm), and guaranteed ±30 kV ESD rating - making it the optimal choice for next-gen automotive electronics where space, reliability, and regulatory compliance are jointly constrained.
Availability
VTVS25ASMF-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-C interface protection, industrial PLC inputs, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for VTVS25ASMF-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 board-level ESD and surge protection in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance and low-capacitance signal-line integration.
FAQ
What is the maximum clamping voltage of the VTVS25ASMF-HM3-18 under a 10/1000 μs surge?
The VTVS25ASMF-HM3-18 has a maximum reverse clamping voltage (VC) of 42 V at its rated peak pulse current (IPPM) of 9.07 A under a 10/1000 μs waveform. This value is measured per standard test conditions and ensures downstream circuitry remains within safe operating voltage limits during transient events. The VTVS25ASMF-HM3-18 achieves this clamping performance while maintaining unidirectional polarity and low leakage current.
Is the VTVS25ASMF-HM3-18 qualified for automotive applications?
Yes, the VTVS25ASMF-HM3-18 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and ESD robustness - all required for automotive under-hood and cabin electronics. Its -55 °C to +175 °C operating range and halogen-free construction align with automotive OEM specifications. The VTVS25ASMF-HM3-18 is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What does the "HM3-18" suffix in VTVS25ASMF-HM3-18 indicate?
The "HM3-18" suffix denotes halogen-free (H), lead (Pb)-free tin-plated terminations (M), 3 k per 7″ reel packaging (3), and tape-and-reel format optimized for automated SMT placement (18). This configuration ensures RoHS compliance, compatibility with standard reflow profiles, and efficient handling in high-volume manufacturing. The VTVS25ASMF-HM3-18 uses the same die and SMF package as other variants in the series but differs in environmental and packaging codes.
Can the VTVS25ASMF-HM3-18 be used on high-speed data lines?
The VTVS25ASMF-HM3-18 exhibits 433 pF typical capacitance at 0 V, which limits its suitability for high-speed differential interfaces like USB 3.2 Gen 2 or PCIe Gen 4. However, it is appropriate for USB 2.0, CAN FD, and RS-485 lines where signal rise times exceed ~1 ns and layout allows series impedance isolation. For such use, the VTVS25ASMF-HM3-18 must be placed adjacent to the connector with short traces to minimize inductance and preserve clamping speed.
How does the VTVS25ASMF-HM3-18 compare to the G-suffix version (e.g., VTVS25GSMF)?
The VTVS25ASMF-HM3-18 has ±5 % breakdown voltage tolerance, whereas the G-suffix variant (VTVS25GSMF) offers tighter ±2 % tolerance - useful in precision voltage-clamp applications where minimal variation in clamping onset is required. Both share identical package, power rating, ESD rating, and thermal specs. The VTVS25ASMF-HM3-18 is preferred when cost sensitivity outweighs the need for tighter VBR control.
VTVS25ASMF-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):
- 25.2V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 42V
- Current - Peak Pulse (10/1000µs):
- 9.07A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 433pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS25ASMF-HM3-18 FAQ
1.How can I place an order for VTVS25ASMF-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS25ASMF-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 VTVS25ASMF-HM3-18 reliable?
The price and inventory of VTVS25ASMF-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 VTVS25ASMF-HM3-18 is usually 5 days.
3.What payment methods are accepted for VTVS25ASMF-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS25ASMF-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS25ASMF-HM3-18?
VTVS25ASMF-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS25ASMF-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 VTVS25ASMF-HM3-18?
For technical support, including VTVS25ASMF-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS25ASMF-HM3-18 requirements.
6.How does Aetrix verify that VTVS25ASMF-HM3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS25ASMF-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 VTVS25ASMF-HM3-18 meets industry standards.
7.What is the process for return or replacement of VTVS25ASMF-HM3-18?
All VTVS25ASMF-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS25ASMF-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 VTVS25ASMF-HM3-18 part is unused and in its original packaging.
Return procedure for VTVS25ASMF-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS25ASMF-HM3-18 Tags
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