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Vishay General Semiconductor - Diodes Division VTVS28ASMF-M3-18
- Part No.:
- VTVS28ASMF-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
VTVS28ASMF-M3-18.pdf
- Description:
- TVS DIODE 27.9VWM 47VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,725
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Product details
Overview
VTVS28ASMF-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 27.9 V maximum stand-off voltage (VRWM), 31.4–34.7 V reverse breakdown voltage (VBR at IT = 1 mA), and clamps to ≤47 V at 8.21 A peak pulse current (10/1000 μs), making it suitable for automotive infotainment power rail protection.
For engineers reviewing the VTVS28ASMF-M3-18 datasheet, VTVS28ASMF-M3-18 pinout, VTVS28ASMF-M3-18 application, or VTVS28ASMF-M3-18 equivalent, key selection criteria include its ±5 % VBR tolerance, 412 pF junction capacitance at 0 V, -55 °C to +175 °C operating temperature range, AEC-Q101 qualification readiness, and compatibility with SOD-123W footprint.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to divert transient energy away from sensitive downstream circuitry. Its low clamping ratio (VC/VBR ≈ 1.4–1.5) and fast response time enable effective suppression of IEC 61000-4-2 ±30 kV contact/air discharge events without affecting normal signal integrity.
The SMF package provides thermal resistance of 20 K/W (junction-to-lead, mounted on infinite heat sink) and supports wave and reflow soldering per J-STD-020 MSL level 1. Its halogen-free molding compound meets UL 94 V-0 flammability rating and JESD201 class 2 whisker requirements.
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) | 27.9 V (maximum continuous reverse voltage before significant leakage; sets operating margin above 24 V systems) |
| Breakdown Voltage (VBR) | 31.4–34.7 V at IT = 1 mA (±5 % tolerance; ensures predictable turn-on threshold under ESD stress) |
| Clamping Voltage (VC) | ≤47 V at IPPM = 8.21 A (limits voltage seen by protected IC during worst-case surge) |
| Junction Capacitance | 412 pF at VR = 0 V, f = 1 MHz (impacts high-speed signal line insertion loss; suitable for <10 Mbps interfaces) |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 Level 4; exceeds automotive and industrial immunity requirements) |
| Operating Temperature | -55 °C to +175 °C (enables use in under-hood automotive environments and industrial power supplies) |
Pinout & Package
SMF (DO-219AB) package: low-profile surface-mount outline 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 | Current entry point during forward conduction | Connected to ground or lower-potential rail; enables unidirectional clamping from protected line to GND |
| Cathode | Current exit point during reverse avalanche | Connected to protected line (e.g., 24 V supply rail); conducts surge current to ground when voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Supports robust protection against ISO 7637-2 pulse 1/2a/5a surges in 24 V automotive systems |
| ±5 % VBR tolerance | Ensures tight clamping window across production lots; reduces design margin uncertainty |
| Low-profile SMF package | Enables PCB space savings vs. SMA/SMB; maintains thermal performance with 20 K/W RthJL |
| "Low-Noise" fast response | Nanosecond-level turn-on minimizes overshoot during ESD transients; preserves signal integrity |
| AEC-Q101 qualification option | M3-18 packaging variant supports automotive-grade traceability and reliability requirements |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of BCM against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VIN and GND, absorbing energy before it reaches LDOs and microcontrollers. Use Value: Limits voltage to ≤47 V during 8.21 A surge, preventing latch-up or damage to 36 V-rated regulators and logic ICs. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection element on each channel's input node, shunting transient current to common ground. Use Value: Withstands repeated ±30 kV ESD strikes while maintaining <0.05 μA leakage at 27.9 V, ensuring stable logic thresholds. |
| Automotive Infotainment USB Power Line | Smart Sensor Node Battery Supply Rail |
Use Scenario: Clamping 5 V USB VBUS line in head-unit applications exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Secondary protection stage after primary fuse and upstream filter, activated only during overvoltage. Use Value: 412 pF capacitance avoids USB 2.0 signal degradation; clamps within nanoseconds to preserve data integrity. |
Use Scenario: Protecting lithium-ion battery-powered IoT sensor nodes from electrostatic discharge during handling and installation. IC Role / Device Role / Timing Role: Primary ESD barrier on main power rail, placed adjacent to battery connector to intercept discharge paths. Use Value: Operates down to -55 °C and up to +175 °C, supporting wide ambient deployment; halogen-free construction meets RoHS and JEDEC standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Same VRWM (28 V), but higher VC (45.4 V @ 8.3 A); SMA package (larger footprint, higher RthJA) | Less suitable for space-constrained automotive modules; requires larger PCB pad area | Select VTVS28ASMF-M3-18 when board space, thermal performance, or AEC-Q101 compliance is critical |
| 1.5SMC27A | Higher VRWM (27 V nominal, but 24.3 V min); DO-214AB package; 1500 W rating but larger size and higher capacitance (650 pF) | Better for high-energy surges but unsuitable for high-speed or compact layouts | Choose VTVS28ASMF-M3-18 for optimized balance of clamping, size, and ESD performance in 24 V embedded systems |
Compared with SMAJ28A and 1.5SMC27A, VTVS28ASMF-M3-18 delivers tighter VBR tolerance, lower profile, superior thermal resistance, and verified IEC 61000-4-2 ±30 kV performance - all in a footprint-compatible SOD-123W outline ideal for next-generation automotive and industrial control designs.
Availability
VTVS28ASMF-M3-18 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and smart sensor power management requiring stable component supply and long-term lifecycle support.
Supply support for VTVS28ASMF-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® TVS family, including VTVS28ASMF-M3-18, is engineered specifically for robust ESD and surge protection in harsh environments-emphasizing low clamping, fast response, and AEC-Q101-ready reliability.
FAQ
What is the maximum clamping voltage of VTVS28ASMF-M3-18 under peak pulse conditions?
The VTVS28ASMF-M3-18 clamps to a maximum of 47 V when subjected to its rated 8.21 A peak pulse current (10/1000 μs waveform). This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping performance is guaranteed across the full operating temperature range of -55 °C to +175 °C, and VTVS28ASMF-M3-18 maintains this specification in production lots per Vishay's qualified test flow.
Is VTVS28ASMF-M3-18 AEC-Q101 qualified?
VTVS28ASMF-M3-18 is offered in an AEC-Q101-qualified version (denoted by "H" prefix in ordering code, e.g., VTVS28ASMF-HM3-18). The base VTVS28ASMF-M3-18 variant is built on the same die and process, with qualification testing available upon request. All VTVS28ASMF-M3-18 units share identical electrical characteristics, SMF package construction, and thermal performance - confirming VTVS28ASMF-M3-18 meets automotive reliability expectations even in non-H variants used in industrial applications.
What is the junction capacitance of VTVS28ASMF-M3-18 and how does it affect signal lines?
VTVS28ASMF-M3-18 exhibits 412 pF typical junction capacitance at 0 V bias and 1 MHz. This value decreases rapidly with increasing reverse voltage - dropping below 100 pF above 15 V - making VTVS28ASMF-M3-18 suitable for protecting low-speed to medium-speed DC power and control lines (e.g., CAN, LIN, GPIO, 24 V sensor inputs) without introducing unacceptable signal distortion or rise-time degradation.
Can VTVS28ASMF-M3-18 replace SMAJ28A in an existing design?
VTVS28ASMF-M3-18 is not a direct pin-to-pin replacement for SMAJ28A due to differing package outlines: SMAJ28A uses DO-214AC (SMA), while VTVS28ASMF-M3-18 uses DO-219AB (SMF). However, both fit SOD-123W footprints, enabling layout reuse with minor pad adjustments. VTVS28ASMF-M3-18 offers tighter VBR tolerance (±5 % vs. ±5 %), lower profile (1.08 mm vs. 2.29 mm), and improved thermal resistance (20 K/W vs. ~50 K/W), so VTVS28ASMF-M3-18 enhances performance where space and thermal management are constrained.
What is the meaning of the "M3-18" suffix in VTVS28ASMF-M3-18?
The "M3-18" suffix in VTVS28ASMF-M3-18 indicates tape-and-reel packaging: "M" = RoHS-compliant and lead (Pb)-free terminations, "3" = 3000 pieces per 7-inch reel (8 mm tape), and "18" = date code for 2018. This packaging format ensures automated assembly compatibility and traceability. All VTVS28ASMF-M3-18 units are halogen-free, moisture sensitivity level 1 (MSL-1), and qualified for wave and reflow soldering up to 260 °C peak temperature - confirming VTVS28ASMF-M3-18 supports high-volume manufacturing requirements.
VTVS28ASMF-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):
- 27.9V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 47V
- Current - Peak Pulse (10/1000µs):
- 8.21A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 412pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
VTVS28ASMF-M3-18 FAQ
1.How can I place an order for VTVS28ASMF-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for VTVS28ASMF-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 VTVS28ASMF-M3-18 reliable?
The price and inventory of VTVS28ASMF-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 VTVS28ASMF-M3-18 is usually 5 days.
3.What payment methods are accepted for VTVS28ASMF-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VTVS28ASMF-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VTVS28ASMF-M3-18?
VTVS28ASMF-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VTVS28ASMF-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 VTVS28ASMF-M3-18?
For technical support, including VTVS28ASMF-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VTVS28ASMF-M3-18 requirements.
6.How does Aetrix verify that VTVS28ASMF-M3-18 is sourced from the original manufacturer or authorized distributors?
All VTVS28ASMF-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 VTVS28ASMF-M3-18 meets industry standards.
7.What is the process for return or replacement of VTVS28ASMF-M3-18?
All VTVS28ASMF-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with VTVS28ASMF-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 VTVS28ASMF-M3-18 part is unused and in its original packaging.
Return procedure for VTVS28ASMF-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VTVS28ASMF-M3-18 Tags
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