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Vishay General Semiconductor - Diodes Division SM6T150CA-E3/5B
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- Part No.:
- SM6T150CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T150CA-E3/5B.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,416
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Product details
Overview
SM6T150CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 150 V standoff voltage (VWM), 207 V clamping voltage (VC) at 2.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs). It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T150CA-E3/5B datasheet, SM6T150CA-E3/5B pinout, SM6T150CA-E3/5B application, or SM6T150CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3/HM3 variants), low inductance design, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 143–158 V (min/max at 1 mA IT) and clamping voltage of 207 V (max) under 10/1000 μs waveform. Its glass-passivated junction ensures stable leakage performance (<1 μA at VWM = 128 V) and robust surge handling up to 100 A IFSM (unidirectional only; not applicable here).
Thermal resistance is characterized at RθJA = 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation within -65 °C to +150 °C junction temperature range. The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - maximum reverse stand-off voltage before clamping begins; defines operating margin below breakdown |
| VBR (min/max) | 143 V / 158 V at 1 mA - guaranteed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | 207 V at 2.9 A (10/1000 μs) - maximum clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capacity without failure under standardized waveform |
| TJ max. | +150 °C - maximum allowable junction temperature; enables use in under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount outline with 0.220" x 0.130" footprint; optimized for high-density PCB layout |
| Leakage ID | <1 μA at 128 V - minimal DC loading on protected line during normal operation |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity-unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No polarity marking; either end functions identically as clamping node in AC or differential signal paths |
| Case | Non-connected thermal path | Plastic body provides electrical isolation; thermal transfer occurs via soldered leads only |
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 automotive ECUs |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| Low inductance construction | Minimizes voltage overshoot during fast transients (e.g., ESD > 30 kV), critical for high-speed data line protection |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn cracking or delamination risk |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting LIN/CAN physical layer inputs in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between transceiver I/O pins and connector interface. Use Value: Limits induced transients to ≤207 V, preventing damage to MAX13041 or TJA1042 transceivers while maintaining signal integrity. | Use Scenario: Safeguarding RS-485/RS-422 communication ports in PLC backplanes subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential bus lines (A/B), upstream of isolated signal conditioner. Use Value: Absorbs 600 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) |
| Consumer Appliance Motor Drive Protection | Telecom Power Supply Input Clamping |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart HVAC actuators. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp flyback spikes during PWM commutation. Use Value: Withstands repetitive 2.9 A surges at 207 V clamping, extending MOSFET lifetime in DRV8876-based H-bridge designs. | Use Scenario: Secondary-side transient suppression on 48 V telecom rectifier outputs feeding base station radios. IC Role / Device Role / Timing Role: Final-stage clamping device after bulk filtering, protecting downstream DC-DC converters. Use Value: Maintains <1 μA leakage at 128 V, avoiding unnecessary standby power loss while delivering 600 W surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA | Same VWM (128 V), lower PPPM (400 W), SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required | Select when board space is constrained and surge energy is confirmed ≤400 W |
| 1.5KE150CA | Higher VWM (128 V), same clamping (207 V), axial DO-201 package, 1500 W rating but larger footprint | Not SMT-compatible; requires through-hole assembly and additional mounting area | Choose only for legacy through-hole designs or where higher peak power headroom justifies manual assembly |
Compared with SMAJ150CA and 1.5KE150CA, SM6T150CA-E3/5B delivers optimal balance of 600 W surge capacity, SMB SMT compatibility, and thermal performance (RθJA = 100 °C/W), making it preferred for new automotive and industrial PCB designs requiring AEC-Q101-ready TVS protection.
Availability
SM6T150CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer appliance motor drives, and telecom power supply input stages requiring stable component supply and RoHS-compliant sourcing.
Supply support for SM6T150CA-E3/5B 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, power efficiency, and automotive-grade qualification.
The SM6T Series is designed specifically for surface-mount transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom applications where bidirectional clamping, high surge robustness, and automated assembly compatibility are essential.
FAQ
What is the clamping voltage of SM6T150CA-E3/5B under standard test conditions?
The SM6T150CA-E3/5B has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 μs waveform at 2.9 A peak pulse current (IPPM). This value is measured per JEDEC standards and guarantees the protected circuit will not experience voltages exceeding 207 V during such transient events. The SM6T150CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SM6T150CA-E3/5B suitable for automotive applications requiring AEC-Q101 qualification?
The SM6T150CA-E3/5B itself is RoHS-compliant commercial grade (E3 suffix); however, the SM6T150CA-HE3 variant is explicitly AEC-Q101 qualified. Engineers requiring automotive qualification must specify the HE3 or HM3 suffix. The SM6T150CA-E3/5B shares identical electrical and mechanical characteristics with its qualified counterparts except for the final reliability screening process.
What is the standoff voltage (VWM) and why is it important for SM6T150CA-E3/5B?
The SM6T150CA-E3/5B has a standoff voltage (VWM) of 128 V, meaning it remains non-conductive up to this reverse voltage level during normal operation. This parameter ensures minimal leakage current (<1 μA) and avoids interference with circuit functionality while providing sufficient margin below the 143–158 V breakdown range. Selecting a VWM correctly prevents false triggering in 12 V or 24 V automotive systems.
How does the SMB (DO-214AA) package of SM6T150CA-E3/5B compare to SMA in terms of thermal performance?
The SMB package of SM6T150CA-E3/5B offers RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads), which is significantly better than the SMA package's typical RθJA = 140 °C/W. This 40 °C/W improvement allows the SM6T150CA-E3/5B to sustain higher average power dissipation or operate reliably at elevated ambient temperatures-critical for under-hood automotive placements where the SM6T150CA-E3/5B is commonly deployed.
Can SM6T150CA-E3/5B be used in bidirectional signal line protection?
Yes, the "CA" suffix in SM6T150CA-E3/5B explicitly denotes bidirectional functionality, meaning it clamps symmetrically for both positive and negative transients. This makes it ideal for protecting differential buses like CAN, RS-485, or audio lines where polarity reversal is possible. Unlike unidirectional variants, the SM6T150CA-E3/5B has no cathode marking and performs identically regardless of voltage polarity applied.
SM6T150CA-E3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T150CA-E3/5B FAQ
1.How can I place an order for SM6T150CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T150CA-E3/5B 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 SM6T150CA-E3/5B reliable?
The price and inventory of SM6T150CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T150CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T150CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T150CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T150CA-E3/5B?
SM6T150CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T150CA-E3/5B 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 SM6T150CA-E3/5B?
For technical support, including SM6T150CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T150CA-E3/5B requirements.
6.How does Aetrix verify that SM6T150CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T150CA-E3/5B 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 SM6T150CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T150CA-E3/5B?
All SM6T150CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T150CA-E3/5B, 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 SM6T150CA-E3/5B part is unused and in its original packaging.
Return procedure for SM6T150CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T150CA-E3/5B Tags
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