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Vishay General Semiconductor - Diodes Division VTVS25ASMF-M3-18
- Part No.:
- VTVS25ASMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS25ASMF-M3-18.pdf
- Description:
- TVS DIODE 25.2VWM 42VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,691
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Product details
Overview
VTVS25ASMF-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 such as USB, HDMI, and automotive sensor interfaces. It features a 25.2 V maximum working voltage (VRWM), 28.5–31.5 V reverse breakdown voltage (VBR) at 1 mA, 42 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤42 V at rated current.
For engineers reviewing the VTVS25ASMF-M3-18 datasheet, VTVS25ASMF-M3-18 pinout, VTVS25ASMF-M3-18 application, or VTVS25ASMF-M3-18 equivalent, this device is selected for robust ±30 kV IEC 61000-4-2 contact/air discharge protection, low 433 pF capacitance at 0 V, and AEC-Q101 qualification suitability in space-constrained automotive and industrial PCB layouts.
Technical Context
The VTVS25ASMF-M3-18 operates as a unidirectional avalanche diode with precise 25.2 V stand-off capability and tight ±5 % VBR tolerance. Its low-clamping behavior (VC ≤ 42 V at IPPM = 9.07 A) ensures downstream IC protection during fast transients while maintaining signal integrity on high-speed lines.
Engineered for reflow and wave soldering, it uses halogen-free molding compound (UL 94 V-0), achieves MSL level 1 moisture sensitivity rating, and supports junction temperatures from –55 °C to +175 °C - enabling deployment in under-hood automotive environments and industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W (10/1000 μs waveform); sustains high-energy surges without thermal runaway |
| Stand-off Voltage (VRWM) | 25.2 V max; defines maximum continuous DC operating voltage before leakage exceeds 0.05 μA |
| Breakdown Voltage (VBR) | 28.5–31.5 V at IT = 1 mA; tight ±5 % tolerance enables predictable clamping onset |
| Clamping Voltage (VC) | ≤42 V at IPPM = 9.07 A; limits transient overvoltage seen by protected ICs |
| Capacitance (CD) | 433 pF at VR = 0 V, f = 1 MHz; low enough for USB 2.0 and CAN FD data lines |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2; meets automotive infotainment ESD immunity requirements |
| Package | SMF (DO-219AB); 3.9 × 1.9 × 1.08 mm footprint compatible with SOD-123W layout |
Pinout & Package
SMF (DO-219AB) package: surface-mount, low-profile (1.08 mm height), cathode marked by bar on top surface; compatible with standard SOD-123W PCB footprints and reflow profiles up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to protected line's ground or low-side return path; defines polarity-sensitive protection direction |
| Cathode | Transient current sink | Connected to protected signal line; conducts surge current to ground when VR > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 pulse 1/2a/3a surges in 12 V automotive systems |
| ±5 % VBR tolerance | Reduces design margin uncertainty versus ±10 % parts, allowing tighter VRWM selection near IC absolute maximum ratings |
| 433 pF capacitance | Minimizes signal distortion on 480 Mbps USB 2.0 lines; avoids eye diagram closure or timing jitter |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JESD22-A114 |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and automotive OEM material declarations (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Sensor Interface | USB 2.0 Port Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp transients before reaching sensitive analog front-end or transceiver inputs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and ADCs during 12 V system surges, leveraging 25.2 V VRWM and 42 V VC clamping. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 host/device ports against ESD events in industrial HMIs and automotive infotainment head units. IC Role / Device Role: Low-capacitance TVS placed differential across data lines to suppress ±30 kV contact discharge without degrading signal integrity. Use Value: Maintains USB 2.0 eye diagram compliance (480 Mbps) with only 433 pF loading, avoiding bit errors or link renegotiation failures. |
| Industrial PLC Digital I/O | Automotive Camera Module Power Line |
Use Scenario: Protecting 24 V digital input channels on programmable logic controllers from field-induced surges and inductive switching transients. IC Role / Device Role: Standoff-rated TVS connected between input terminal and common ground to absorb 400 W transients without forward conduction. Use Value: Enables reliable operation in factory-floor environments with frequent relay coil switching, using 25.2 V VRWM to avoid false triggering on nominal 24 V signals. |
Use Scenario: Shielding 12 V power supply lines feeding MIPI CSI-2 camera modules in ADAS systems from battery line transients and alternator ripple. IC Role / Device Role: Unidirectional TVS installed between VCC and GND to clamp positive-going spikes while preserving quiescent current draw below 0.05 μA. Use Value: Ensures camera module uptime during cold-crank and jump-start scenarios where VCC may spike to 30 V, leveraging 31.5 V VBR upper limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Higher VRWM (26 V), same DO-214AC package, but 400 W rating with looser ±10 % VBR tolerance | Larger footprint (4.5 × 2.7 mm vs. 3.9 × 1.9 mm); less suitable for dense automotive PCBs | Select when legacy SMA layout exists and tighter VBR tolerance is not required |
| TPSMF26A | Same SMF package, 26 V VRWM, ±5 % VBR, but lower 200 W peak power (10/1000 μs) | Insufficient for ISO 7637-2 pulse 1 (400 W requirement); limited to ESD-only use cases | Choose only for cost-sensitive consumer electronics where 400 W surge immunity is not mandated |
Compared with SMAJ26A and TPSMF26A, the VTVS25ASMF-M3-18 delivers superior space efficiency (30 % smaller footprint), tighter voltage tolerance for precision clamping, and full 400 W surge handling - making it optimal for next-generation automotive and industrial designs demanding miniaturization and robustness.
Availability
VTVS25ASMF-M3-18 is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 port protection, and industrial PLC digital I/O requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for VTVS25ASMF-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, and optoelectronics 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 packaging, and consistent clamping performance across temperature.
FAQ
What is the maximum operating temperature range for the VTVS25ASMF-M3-18?
The VTVS25ASMF-M3-18 supports a junction temperature range of –55 °C to +175 °C, validated per AEC-Q101 stress testing. This allows direct placement in under-hood automotive locations and high-temperature industrial enclosures without derating, provided thermal resistance to ambient remains within RthJA limits specified in the datasheet.
Does the VTVS25ASMF-M3-18 meet automotive qualification standards?
Yes, the VTVS25ASMF-M3-18 is AEC-Q101 qualified, covering tests including HTGB, HTRB, temperature cycling, and ESD per JESD22-A114. The "M3" suffix denotes tape-and-reel packaging compliant with JEDEC J-STD-020 MSL level 1, and the "-18" indicates 10K per 13″ reel - both critical for automotive production traceability.
How does the 433 pF capacitance of the VTVS25ASMF-M3-18 affect high-speed signal lines?
The VTVS25ASMF-M3-18's 433 pF capacitance at 0 V is measured at 1 MHz and decreases significantly at higher bias voltages. On USB 2.0 D+/D− lines, this value introduces negligible insertion loss below 200 MHz, preserving eye diagram margins and ensuring interoperability with USB-IF certified hosts and peripherals without requiring additional equalization.
Can the VTVS25ASMF-M3-18 be used for bidirectional protection?
No, the VTVS25ASMF-M3-18 is a unidirectional TVS diode, optimized for clamping positive transients relative to ground. For bidirectional protection (e.g., AC lines or symmetric data buses), a dedicated bidirectional part such as VTVS25BSMF-M3-18 - with symmetrical ±25.2 V VRWM - must be selected instead.
What is the meaning of the "A" and "M3-18" in VTVS25ASMF-M3-18?
The "A" denotes ±5 % tolerance on reverse breakdown voltage (VBR); "M3" specifies halogen-free, RoHS-compliant, lead (Pb)-free terminations with tin plating; "-18" indicates packaging in 10K quantities per 13″ reel. These codes align with Vishay's standardized ordering nomenclature defined in document 85891 Rev. 2.2.
VTVS25ASMF-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- 433pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS25ASMF-M3-18 FAQ
1.How can I place an order for VTVS25ASMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS25ASMF-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 VTVS25ASMF-M3-18 reliable?
The price and inventory of VTVS25ASMF-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 VTVS25ASMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS25ASMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS25ASMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS25ASMF-M3-18?
VTVS25ASMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS25ASMF-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 VTVS25ASMF-M3-18?
For technical support, including VTVS25ASMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS25ASMF-M3-18 requirements.
6.How does Aetrix verify that VTVS25ASMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS25ASMF-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 VTVS25ASMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS25ASMF-M3-18?
All VTVS25ASMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS25ASMF-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 VTVS25ASMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS25ASMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS25ASMF-M3-18 Tags
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