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Vishay General Semiconductor - Diodes Division SM6T30A-E3/5B
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- Part No.:
- SM6T30A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30A-E3/5B.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,301
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Product details
Overview
SM6T30A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 30 V breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 41.5 V maximum clamping voltage (VC) at 14.5 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform-designed to protect MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T30A-E3/5B datasheet, SM6T30A-E3/5B pinout, SM6T30A-E3/5B application, or SM6T30A-E3/5B equivalent, key selection criteria include unidirectional polarity, 25.6 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, 100 °C/W junction-to-ambient thermal resistance, and RoHS-compliant commercial-grade construction with matte tin-plated leads.
Technical Context
The SM6T30A-E3/5B operates as a unidirectional TVS diode with glass-passivated junction, optimized for low-inductance clamping of fast-rising transients. Its 10/1000 μs waveform response delivers 14.5 A peak pulse current (IPPM) while limiting voltage to ≤41.5 V, enabling robust protection of 3.3 V–24 V logic interfaces and power rails.
Designed for automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports operation from −65 °C to +150 °C junction temperature-making it suitable for under-hood automotive environments when paired with appropriate thermal layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise voltage threshold where avalanche conduction begins |
| VWM | 25.6 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 41.5 V at 14.5 A (10/1000 μs) - clamped voltage during worst-case surge, critical for downstream IC survivability |
| PPPM | 600 W - peak transient power handling capacity, determines protection margin against ISO 7637-2 Pulse 1/2a/5a |
| IFSM | 100 A - single half-sine surge rating (10 ms), relevant for load-dump immunity in 12 V automotive systems |
| RθJA | 100 °C/W - thermal resistance limits power derating above 25 °C ambient; requires minimum pad area for spec compliance |
| TJ range | −65 °C to +150 °C - enables deployment in engine control modules and industrial motor drives |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-band marked end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); 0.220" × 0.155" mounting footprint with 0.086" cathode band width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-voltage reference; completes clamping path during positive transients |
| Cathode | High-side connection (marked with band) | Connected to protected line (e.g., CAN_H, LIN, sensor supply); conducts avalanche current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables suppression of high-energy transients like ISO 7637-2 Pulse 5a without thermal runaway |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without popcorn cracking or delamination |
| Low inductance design | Minimizes voltage overshoot during nanosecond-scale transients (e.g., ESD, relay bounce) |
| RoHS-compliant, matte tin plating | Meets IPC-J-STD-002/JESD22-B102 solderability requirements for high-yield assembly |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VOUT and chassis ground to shunt transients before reaching ADC input. Use Value: Limits clamped voltage to 41.5 V, preserving 24 V-rated op-amps and isolators downstream while surviving 100 A surge events. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers interfacing with field switches and solenoids. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point to absorb inductive kickback from 24 V DC coils. Use Value: Withstands 600 W surges and maintains <1.0 μA leakage at 25.6 V, ensuring no false triggering of Schmitt-trigger inputs during normal operation. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Transient suppression on RS-485 bus lines in base station remote units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (unidirectional SM6T30A-E3/5B used in single-ended bias configurations). Use Value: Delivers 41.5 V clamping at 14.5 A, compatible with TI SN65HVD7x or Analog Devices ADM3485 receiver input voltage limits. | Use Scenario: Secondary-side overvoltage protection on 5 V/12 V outputs of wall-mounted AC/DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Final-stage clamp after DC-DC regulation to prevent damage from regulator fault or capacitor failure. Use Value: 25.6 V VWM ensures no conduction during normal 12 V output tolerance (±10%), while 600 W rating absorbs capacitor discharge energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same SMB package, identical VBR (28.5–31.5 V), but lower PPPM = 400 W and higher VC = 48.4 V at 8.3 A | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 3); not recommended for automotive load dump | Select SMAJ30A only if system-level testing confirms 400 W suffices and layout allows tighter thermal management. |
| 1.5SMC33A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), VC = 45.7 V at 32.8 A | Requires PCB redesign due to 75 % larger footprint; suited for primary-side 48 V rail protection | Choose 1.5SMC33A when protecting higher-power subsystems where space permits and 1500 W margin is required. |
Compared with SMAJ30A and 1.5SMC33A, the SM6T30A-E3/5B provides optimal balance of 600 W surge capability, SMB footprint compatibility, and 41.5 V clamping-making it preferred for space-constrained 12 V/24 V automotive and industrial edge nodes where board area and thermal budget are tightly coupled.
Availability
SM6T30A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, consistent RoHS-compliant manufacturing, and traceable lot-level documentation.
Supply support for SM6T30A-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 qualification.
The SM6T Series was developed specifically for surface-mount transient suppression in harsh-environment applications-including AEC-Q101-qualified variants-delivering repeatable clamping performance across wide temperature ranges and high-reliability reflow profiles.
FAQ
What is the breakdown voltage tolerance of SM6T30A-E3/5B?
The SM6T30A-E3/5B has a specified breakdown voltage (VBR) range of 28.5 V to 31.5 V at 1.0 mA test current, representing ±10 % tolerance around the nominal 30 V rating. This tight tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for protecting voltage-sensitive interfaces in automotive ECUs where SM6T30A-E3/5B is commonly deployed.
Is SM6T30A-E3/5B suitable for bidirectional transient protection?
No, SM6T30A-E3/5B is a unidirectional TVS diode, identified by its cathode band marking and specified VBR/VWM parameters for reverse-biased operation only. For bidirectional protection, Vishay offers the SM6T30CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities-SM6T30A-E3/5B must be used with correct polarity orientation relative to the protected line and ground.
What is the maximum clamping voltage of SM6T30A-E3/5B under standard test conditions?
The SM6T30A-E3/5B exhibits a maximum clamping voltage (VC) of 41.5 V when subjected to a 10/1000 μs waveform peak pulse current of 14.5 A. This value is measured with the device mounted on 0.2" × 0.2" copper pads per terminal and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events-directly informing safe margin design for components like SM6T30A-E3/5B-protected CAN transceivers.
Does SM6T30A-E3/5B meet automotive qualification standards?
The base SM6T30A-E3/5B is RoHS-compliant and rated for commercial temperature range (−65 °C to +150 °C), but it is not AEC-Q101 qualified. For automotive-grade use, Vishay offers the SM6T30AHE3_B variant (with "HE3" suffix), which carries full AEC-Q101 qualification-SM6T30A-E3/5B remains suitable for non-safety-critical automotive subsystems where qualification is not mandated, such as infotainment power rails.
What is the thermal resistance of SM6T30A-E3/5B and how does it affect layout?
The SM6T30A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. Exceeding 5.0 W steady-state dissipation-or operating above 25 °C ambient-requires thermal derating per Figure 2 in the datasheet; inadequate copper area will cause premature thermal failure during repetitive surges, so SM6T30A-E3/5B layout must strictly follow Vishay's pad recommendations.
SM6T30A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
SM6T30A-E3/5B FAQ
1.How can I place an order for SM6T30A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30A-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 SM6T30A-E3/5B reliable?
The price and inventory of SM6T30A-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 SM6T30A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T30A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30A-E3/5B?
SM6T30A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30A-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 SM6T30A-E3/5B?
For technical support, including SM6T30A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30A-E3/5B requirements.
6.How does Aetrix verify that SM6T30A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T30A-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 SM6T30A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T30A-E3/5B?
All SM6T30A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30A-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 SM6T30A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T30A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30A-E3/5B Tags
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