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Vishay General Semiconductor - Diodes Division SM6T150A-M3/5B
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- Part No.:
- SM6T150A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150A-M3/5B.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
SM6T150A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 150 V standoff voltage (VWM), 207 V clamping voltage at 2.9 A peak pulse current (10/1000 μs), and 600 W peak pulse power. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SM6T150A-M3/5B datasheet, SM6T150A-M3/5B pinout, SM6T150A-M3/5B application, or SM6T150A-M3/5B equivalent, key selection criteria include clamping voltage margin relative to protected device breakdown, IPPM derating above 25 °C, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp with cathode-band polarity marking. Its silicon junction is glass passivated for reliability, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The device responds to 10/1000 μs transients with sub-100 ns turn-on time and low dynamic impedance.
Designed for surface-mount automated placement, SM6T150A-M3/5B delivers stable clamping performance across -65 °C to +150 °C junction temperature range. Its 20 Ω typical junction-to-lead thermal resistance supports localized heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT = 1.0 mA | 143–158 V - Breakdown voltage range confirming avalanche onset threshold |
| VC @ IPPM = 2.9 A (10/1000 μs) | 207 V - Clamped voltage limiting stress on downstream components during surge |
| PPPM | 600 W - Peak transient power handling capability under standardized waveform |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance defining derating above 25 °C ambient |
| Polarity | Unidirectional - Cathode band denotes terminal requiring negative transient reference |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.20 mm height and 5.59 mm length |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to system ground or low-impedance return plane for surge current routing |
| Cathode | Protected line interface | Connected to line being protected (e.g., power rail or signal trace); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in 12 V/24 V systems |
| Glass passivated chip junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life processing |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (< 1 kV/μs), critical for MOSFET gate protection |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without preconditioning or baking |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in body control modules from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤207 V, preventing overvoltage failure of upstream regulators rated for 36 V max input. | Use Scenario: Safeguarding PLC analog input channels from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Signal-line TVS on 4–20 mA current loop inputs, located adjacent to connector entry point. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to <210 V within 100 ns, preserving ADC front-end integrity. |
| Telecom Power Supply Outputs | Consumer Appliance Control Boards |
Use Scenario: Secondary-side overvoltage suppression on isolated 48 V telecom rectifier outputs feeding base station radios. IC Role / Device Role / Timing Role: Output rail protector positioned after isolation transformer and synchronous rectifier. Use Value: Absorbs 600 W surge energy without degradation, maintaining output regulation during lightning-induced grid disturbances. | Use Scenario: Input protection for microcontroller GPIOs connected to push-button interfaces in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance TVS on user-interface signal traces routed across PCB edge connectors. Use Value: Provides ESD immunity >30 kV (air) while adding <0.5 pF parasitic capacitance, avoiding signal integrity impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Same VWM (128 V), lower PPPM (400 W), higher VC (243 V @ 2.5 A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select SMAJ150A only if system-level surge testing confirms <400 W requirement and layout allows higher clamping margin. |
| 1.5SMC150A | Same VWM, higher VC (243 V @ 2.5 A), larger SMC package (DO-214AB) | Requires PCB area increase (~30% larger footprint); not drop-in compatible | Choose 1.5SMC150A only when thermal budget exceeds SMB limits and board space permits larger package. |
Compared with SMAJ150A and 1.5SMC150A, SM6T150A-M3/5B offers superior 600 W surge capacity and tighter 207 V clamping in the compact SMB outline-critical for space-constrained automotive and industrial modules where both energy handling and layout density matter.
Availability
SM6T150A-M3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom power supply outputs, and consumer appliance control boards requiring stable component supply with halogen-free compliance and AEC-Q101 readiness.
Supply support for SM6T150A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series was engineered for high-reliability transient suppression in harsh environments-designed to meet automotive, industrial, and telecom surge immunity standards while supporting automated SMT assembly and green manufacturing requirements.
FAQ
What is the maximum clamping voltage of SM6T150A-M3/5B under standard test conditions?
The SM6T150A-M3/5B has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 μs waveform at IPPM = 2.9 A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T150A-M3/5B maintains this clamping performance across its full operating temperature range.
Does SM6T150A-M3/5B meet automotive qualification requirements?
SM6T150A-M3/5B is halogen-free and RoHS-compliant per its M3 suffix, but it is not AEC-Q101 qualified. For automotive-grade versions, Vishay offers SM6T150AHM3_X (e.g., SM6T150AHM3_B), which adds AEC-Q101 qualification. The SM6T150A-M3/5B remains suitable for non-safety-critical automotive applications where qualification is not mandated.
What is the thermal resistance from junction to ambient for SM6T150A-M3/5B?
The typical junction-to-ambient thermal resistance (RθJA) of SM6T150A-M3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value governs power derating above 25 °C ambient and must be used with the 5.0 W steady-state power dissipation rating to calculate safe operating temperature margins for the SM6T150A-M3/5B.
How does the M3 suffix affect the environmental compliance of SM6T150A-M3/5B?
The M3 suffix on SM6T150A-M3/5B indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declaration requirements. Unlike E3-suffixed variants, M3 devices exclude brominated flame retardants and antimony trioxide, enabling compliance with stricter green manufacturing and end-of-life recycling mandates without sacrificing electrical or thermal performance of the SM6T150A-M3/5B.
Can SM6T150A-M3/5B be used in bidirectional configurations?
No-SM6T150A-M3/5B is a unidirectional TVS diode, identified by its cathode band marking. For bidirectional operation, Vishay specifies the CA-suffixed variant (e.g., SM6T150CA). Using SM6T150A-M3/5B in reverse-biased AC applications would result in forward conduction and potential failure; always verify polarity alignment in circuit design for the SM6T150A-M3/5B.
SM6T150A-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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 2.9A
- 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)
SM6T150A-M3/5B FAQ
1.How can I place an order for SM6T150A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150A-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 SM6T150A-M3/5B reliable?
The price and inventory of SM6T150A-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 SM6T150A-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T150A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150A-M3/5B?
SM6T150A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150A-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 SM6T150A-M3/5B?
For technical support, including SM6T150A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150A-M3/5B requirements.
6.How does Aetrix verify that SM6T150A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T150A-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 SM6T150A-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T150A-M3/5B?
All SM6T150A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150A-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 SM6T150A-M3/5B part is unused and in its original packaging.
Return procedure for SM6T150A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150A-M3/5B Tags
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