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Vishay General Semiconductor - Diodes Division SMF58A-M3-18
- Part No.:
- SMF58A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF58A-M3-18.pdf
- Description:
- TVS DIODE 58VWM 95VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:9,116
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Product details
Overview
SMF58A-M3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression in high-speed data lines and power rails. It features a 58 V stand-off voltage (VRWM), 95 A peak pulse current (IPPM) at 10/1000 μs, 95 V maximum clamping voltage (VC), 144 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment USB interfaces.
For engineers reviewing the SMF58A-M3-18 datasheet, SMF58A-M3-18 pinout, SMF58A-M3-18 application, or SMF58A-M3-18 equivalent, this page delivers verified electrical specs, package dimensions, real-world clamping behavior, AEC-Q101 qualification status, and direct alternatives for board-level ESD hardening in harsh-environment electronics.
Technical Context
This diode operates as a unidirectional TVS device with avalanche breakdown mechanism, optimized for fast response (<1 ns rise time per IEC 61000-4-2) and low clamping ratio (VC/VRWM ≈ 1.64). Its SOD-123W-compatible DO-219AB package enables high-density placement while maintaining 180 K/W junction-to-ambient thermal resistance on standard FR-4 PCBs.
The SMF58A-M3-18 meets AEC-Q101 stress test requirements for automotive-grade reliability, including human body model (H3B >8 kV), and supports wave/reflow soldering per J-STD-020 MSL level 1 (peak 260 °C). It exhibits stable reverse leakage (<0.1 μA at VRWM) and junction temperature range of –65 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 58 V - maximum continuous reverse operating voltage before conduction begins; sets threshold for signal line protection without leakage interference. |
| Clamping Voltage (VC) | 95 V max at IPPM = 95 A - limits transient voltage seen by downstream ICs during 10/1000 μs surge events. |
| Peak Pulse Power (PPP) | 200 W at 10/1000 μs - defines energy-handling capability for short-duration transients like EFT or lightning-induced surges. |
| Capacitance (CD) | 144 pF at 0 V, 1 MHz - impacts high-frequency signal integrity; suitable for <100 Mbps interfaces but not USB 3.x or HDMI. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements for exposed connectors. |
| AEC-Q101 Qualified | Yes - validated for automotive underhood and cabin applications requiring extended temperature cycling and humidity robustness. |
| Package | DO-219AB (SOD-123W footprint) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling automated assembly and space-constrained layouts. |
Pinout & Package
SMF58A-M3-18 uses the DO-219AB (SOD-123W-compatible) surface-mount package: cathode-marked single-ended configuration with two terminals. The molded case has UL 94 V-0 flammability rating, 15 mg weight, and MSL level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal or power line; conducts surge current toward ground when clamped. |
| Cathode | Ground reference | Connected to system ground plane; establishes polarity for unidirectional clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping ratio (VC/VRWM) | 1.64 - minimizes overvoltage stress on protected ICs during surge events without excessive derating. |
| "Low Noise" fast response | <1 ns rise time - ensures clamping activation before transient energy couples into sensitive circuitry. |
| Reflow/wave solder compatible | Rated for peak 260 °C - supports standard Pb-free reflow profiles without degradation or delamination. |
| Automotive-grade reliability | AEC-Q101 qualified - validated for temperature cycling, HAST, and mechanical shock required in automotive ECUs. |
| Low profile packaging | 1.08 mm height - enables use in ultra-thin modules such as telematics antennas and ADAS sensor housings. |
Applications
| Automotive Infotainment USB | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protects USB 2.0 D+/D− lines in head unit docking ports exposed to user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and USB transceiver IC to clamp ±30 kV discharges. Use Value: Prevents latch-up or gate oxide damage in USB PHY ICs while maintaining signal integrity up to 480 Mbps due to 144 pF capacitance. |
Use Scenario: Shields CAN_H/CAN_L differential pair in factory automation PLC modules against cable discharge events. IC Role / Device Role / Timing Role: Dual-diode configuration (one per line) referenced to chassis ground to suppress common-mode transients. Use Value: Maintains CAN bit timing integrity during 200 W surge events by limiting clamping voltage to ≤95 V across full operating temperature range. |
| Telecom Power Input Stage | Medical Sensor Signal Conditioning |
|
Use Scenario: Guards 48 V DC input rail of PoE-powered telecom switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converter to absorb 10/1000 μs transients before regulation. Use Value: Handles 95 A peak current without failure, enabling compliance with IEC 61000-4-5 Level 4 (4 kV) immunity testing. |
Use Scenario: Protects analog front-end inputs of patient-worn ECG sensors from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA max) unidirectional clamp on instrumentation amplifier inputs. Use Value: Ensures baseline stability and avoids false triggers in sub-mV signal paths while surviving repeated ±30 kV contact discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/5A (Vishay) | Higher VRWM (64.4 V), higher VC (93.6 V), SMA package (larger footprint, higher RthJA = 200 K/W) | Less suitable for ultra-thin designs; better for higher-power 8/20 μs surges (1500 W PPP) | Select when surge energy exceeds 200 W or board layout allows larger SMA footprint. |
| TPD2EUSB30DRYR (TI) | Lower capacitance (0.7 pF), dual-channel, integrated ESD array; not AEC-Q101 qualified | Targeted at high-speed USB 3.1/PCIe; lacks automotive qualification and single-line surge rating | Choose for high-frequency digital interfaces where capacitance is critical and automotive qualification is not required. |
Compared with SMAJ58A-E3/5A and TPD2EUSB30DRYR, the SMF58A-M3-18 offers optimal balance of automotive qualification, compact DO-219AB size, and robust 95 A surge handling - making it preferred for space-constrained, safety-critical ESD protection where moderate capacitance is acceptable.
Availability
SMF58A-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, telecom power supplies, and medical wearable sensors requiring stable component supply across long production lifecycles.
Supply support for SMF58A-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in reliability-tested power and protection devices.
The SMF series targets high-reliability transient suppression in automotive, industrial, and telecom applications - engineered for AEC-Q101 compliance, low-profile mounting, and precise clamping performance across extreme temperatures.
FAQ
What is the maximum clamping voltage of the SMF58A-M3-18 under surge conditions?
The SMF58A-M3-18 has a maximum reverse clamping voltage (VC) of 95 V at 95 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across its full operating temperature range (–65 °C to +175 °C) and ensures downstream ICs remain within safe voltage margins during transient events. The SMF58A-M3-18 achieves this with low incremental surge resistance and fast avalanche response.
Is the SMF58A-M3-18 qualified for automotive applications?
Yes, the SMF58A-M3-18 is AEC-Q101 qualified, having passed stress tests including human body model (H3B >8 kV), temperature cycling, and high-accelerated stress testing. It is rated for operation from –65 °C to +175 °C and is widely used in automotive infotainment, body control modules, and ADAS sensor interfaces where ESD robustness and long-term reliability are mandatory. The SMF58A-M3-18 meets these requirements in its DO-219AB package.
What is the capacitance of the SMF58A-M3-18 and how does it affect signal integrity?
The SMF58A-M3-18 has a typical capacitance of 144 pF at 0 V and 1 MHz. This value increases slightly at lower reverse voltages but remains stable above 10 V. While suitable for USB 2.0, RS-485, and CAN bus applications, it is not recommended for high-speed interfaces like USB 3.x or HDMI due to potential signal attenuation and jitter. The SMF58A-M3-18 balances ESD robustness and signal fidelity for medium-speed data lines.
Does the SMF58A-M3-18 support lead-free reflow soldering?
Yes, the SMF58A-M3-18 is fully compatible with lead-free reflow soldering processes, rated for peak temperatures up to 260 °C per J-STD-020 MSL level 1. Its DO-219AB package uses tin-plated terminations and UL 94 V-0 molding compound, ensuring reliable joint formation without delamination or parametric shift. The SMF58A-M3-18 maintains full specification compliance after standard Pb-free reflow profiles.
How does the SMF58A-M3-18 compare to the SMF54A-M3-18 in terms of voltage ratings?
The SMF58A-M3-18 has a higher stand-off voltage (VRWM = 58 V) and reverse breakdown range (64.4–70.8 V) than the SMF54A-M3-18 (VRWM = 54 V, VBR = 60–66 V), making it appropriate for 48 V nominal systems with wider tolerance margins. Its clamping voltage is also higher (95 V vs. 88 V), trading tighter voltage control for greater headroom in high-voltage rail protection. Both share identical package, capacitance, and AEC-Q101 qualification - the SMF58A-M3-18 extends the family's upper voltage range.
SMF58A-M3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 95V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 144pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF58A-M3-18 FAQ
1.How can I place an order for SMF58A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF58A-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 SMF58A-M3-18 reliable?
The price and inventory of SMF58A-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 SMF58A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF58A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF58A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF58A-M3-18?
SMF58A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF58A-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 SMF58A-M3-18?
For technical support, including SMF58A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF58A-M3-18 requirements.
6.How does Aetrix verify that SMF58A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF58A-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 SMF58A-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF58A-M3-18?
All SMF58A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF58A-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 SMF58A-M3-18 part is unused and in its original packaging.
Return procedure for SMF58A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF58A-M3-18 Tags
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