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Vishay General Semiconductor - Diodes Division SM6T100A-M3/5B
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- Part No.:
- SM6T100A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T100A-M3/5B.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,422
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Product details
Overview
SM6T100A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 100 V standoff voltage (VWM), 137 V maximum clamping voltage at 4.4 A peak pulse current (10/1000 μs), 600 W peak pulse power rating, and operates from −65 °C to +150 °C junction temperature. It is used to protect MOSFETs and ICs in automotive power supplies against inductive switching surges.
For engineers reviewing the SM6T100A-M3/5B datasheet, SM6T100A-M3/5B pinout, SM6T100A-M3/5B application, or SM6T100A-M3/5B equivalent, key selection criteria include clamping voltage margin relative to protected device breakdown, unidirectional polarity alignment with DC rail orientation, SMB footprint compatibility, and halogen-free RoHS compliance for automotive-grade production.
Technical Context
The SM6T100A-M3/5B employs a glass-passivated silicon junction optimized for fast response to transient overvoltages. Its unidirectional configuration requires cathode connection toward the positive rail, enabling precise reverse-biased clamping during overvoltage events without forward conduction under normal operation.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform with low dynamic impedance, achieving 137 V clamping at 4.4 A IPPM. Thermal resistance is 100 °C/W junction-to-ambient (on 5.0 mm × 5.0 mm copper pads), supporting reliable operation up to 150 °C TJ max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 85.5 V - Maximum continuous reverse voltage before clamping begins; sets minimum operating margin above nominal 72–96 V automotive supply rails. |
| VBR (Breakdown Voltage) | 95.0–105 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on within ±5% of nominal 100 V rating. |
| VC (Clamping Voltage) | 137 V at 4.4 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; must remain below downstream device absolute maximum ratings. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability for standardized lightning/surge waveforms; validated per IEC 61000-4-5 Level 3. |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.20 mm height and 3.94 mm length; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
| Polarity | Unidirectional - Cathode marked with band; blocks forward current until Vf ≈ 1.2 V, clamps reversely above VWM. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Dimensions: 3.94 mm × 2.20 mm × 1.52 mm (L × W × H). Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path when cathode is at elevated transient voltage. |
| Cathode | High-side clamping terminal | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems without derating. |
| 137 V clamping at 4.4 A | Provides ≥20 V margin below typical 150 V MOSFET drain-source breakdown, preventing destructive overvoltage. |
| Glass-passivated junction | Ensures stable leakage (<1 μA at 85.5 V) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-induced popcorning or delamination. |
| Halogen-free, RoHS-compliant (M3) | Fulfills automotive OEM material declarations (IMDS, CAMDS) and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to 120 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤137 V, preserving functional safety integrity per ISO 26262 ASIL-B. |
Use Scenario: Protecting analog output pins of pressure sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between sensor output and ground to shunt fast transients without distorting 0–5 V signals. Use Value: Maintains signal fidelity with <1 nF junction capacitance while clamping 8 kV contact ESD per IEC 61000-4-2 to <30 V peak. |
| DC-DC Converter Input Stage | MOSFET Gate Driver Transient Suppression |
|
Use Scenario: Safeguarding buck converter inputs against back-EMF from relay coils and motor drivers. IC Role / Device Role / Timing Role: Mounted upstream of input bulk capacitor to absorb repetitive 600 W pulses without thermal runaway. Use Value: Withstands ≥1000 surges at rated power due to low RθJA (100 °C/W) and 150 °C TJ max rating. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs during bootstrap switching transitions. IC Role / Device Role / Timing Role: Placed between gate driver output and MOSFET gate to clamp Miller-induced voltage spikes. Use Value: Fast avalanche response (<1 ns) limits gate-source overvoltage to safe levels, avoiding unintended turn-on or breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/5B | Same VWM (85.5 V), higher VC = 156 V at 3.8 A; SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients due to 400 W PPPM rating; unsuitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge energy does not exceed 40 mJ. |
| 1.5SMC100A | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 75 °C/W; 1.5 kW PPPM rating. | Over-specified for most 12 V systems; requires larger PCB area and higher assembly cost. | Choose only when extended thermal margin or legacy SMC footprint compatibility is required. |
Compared with SMAJ100A-E3/5B and 1.5SMC100A, the SM6T100A-M3/5B offers optimal balance of 600 W surge capacity, SMB footprint efficiency, and halogen-free compliance-making it preferred for new automotive and industrial designs where space, thermal performance, and material content are jointly constrained.
Availability
SM6T100A-M3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC-DC converter input stage design requiring stable component supply across multi-year production cycles.
Supply support for SM6T100A-M3/5B 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on automotive-grade reliability and AEC-Q101 qualification.
The SM6T Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, targeting robustness against ISO 7637-2 and IEC 61000-4-5 threats while meeting stringent halogen-free and RoHS mandates.
FAQ
What is the maximum clamping voltage of the SM6T100A-M3/5B under standard test conditions?
The SM6T100A-M3/5B has a maximum clamping voltage (VC) of 137 V when subjected to a 10/1000 μs waveform at 4.4 A peak pulse current. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The SM6T100A-M3/5B maintains this clamping performance across its specified operating temperature range.
Is the SM6T100A-M3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No-the SM6T100A-M3/5B carries the M3 suffix indicating halogen-free RoHS compliance but not AEC-Q101 qualification. For automotive-qualified versions, select SM6T100AHM3_B/I or SM6T100AHM3_B/H, which include "HM3" and revision suffixes confirming AEC-Q101 testing. The SM6T100A-M3/5B remains appropriate for non-safety-critical industrial and consumer applications.
What is the standoff voltage (VWM) rating of the SM6T100A-M3/5B, and how does it relate to system design?
The SM6T100A-M3/5B has a standoff voltage (VWM) of 85.5 V, representing the maximum continuous reverse voltage it can block without entering avalanche conduction. In system design, this value must exceed the highest expected steady-state voltage on the protected line-e.g., 12 V automotive systems with load-dump margins-while maintaining sufficient headroom below the protected IC's absolute maximum rating. The SM6T100A-M3/5B provides 14.5 V margin above a 72 V nominal load-dump condition.
Does the SM6T100A-M3/5B have polarity markings, and how should it be oriented on the PCB?
Yes-the SM6T100A-M3/5B is unidirectional and features a cathode band marking on the SMB package body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the anode connects to ground or the return path. Incorrect orientation will prevent clamping functionality and may cause forward conduction during normal operation. The SM6T100A-M3/5B's polarity is fixed and non-reversible.
What is the thermal resistance and maximum junction temperature of the SM6T100A-M3/5B?
The SM6T100A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal, and a maximum junction temperature (TJ max) of +150 °C. These parameters define its sustained power dissipation capability: at 25 °C ambient, it can dissipate 5.0 W continuously; derating applies above 25 °C per the published curve. The SM6T100A-M3/5B's thermal performance supports reliable operation in under-hood automotive environments.
SM6T100A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T100A-M3/5B FAQ
1.How can I place an order for SM6T100A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T100A-M3/5B 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 SM6T100A-M3/5B reliable?
The price and inventory of SM6T100A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T100A-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T100A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T100A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T100A-M3/5B?
SM6T100A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T100A-M3/5B 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 SM6T100A-M3/5B?
For technical support, including SM6T100A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T100A-M3/5B requirements.
6.How does Aetrix verify that SM6T100A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T100A-M3/5B 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 SM6T100A-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T100A-M3/5B?
All SM6T100A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T100A-M3/5B, 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 SM6T100A-M3/5B part is unused and in its original packaging.
Return procedure for SM6T100A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T100A-M3/5B Tags
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