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Vishay General Semiconductor - Diodes Division SM6T30CAHE3_B/I
- Part No.:
- SM6T30CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30CAHE3_B/I.pdf
- Description:
- 600W,30V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
SM6T30CAHE3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 30 V standoff voltage (VWM), 33.2 V minimum breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use. It protects signal lines and power rails in sensor interfaces and ECU power inputs against inductive switching transients.
For engineers reviewing the SM6T30CAHE3_B/I datasheet, SM6T30CAHE3_B/I pinout, SM6T30CAHE3_B/I application, or SM6T30CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, 41.5 V max clamping voltage at 14.5 A IPPM, RoHS-compliant AEC-Q101 qualification, and SMB package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates bidirectionally with symmetrical breakdown characteristics - VBR min/max = 33.2 V / 36.8 V at 1.0 mA test current, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its low clamping ratio (VC/VBR ≈ 1.25) ensures tight overvoltage suppression during fast transients.
Designed for high-reliability automotive environments, SM6T30CAHE3_B/I features glass-passivated junction, meets MSL Level 1 (260 °C reflow), and delivers 100 °C/W junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads - critical for sustained surge handling in under-hood electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 33.2 V / 36.8 V at 1.0 mA - defines symmetric bidirectional conduction threshold |
| VC @ IPPM | 41.5 V at 14.5 A (10/1000 μs) - peak clamped voltage during worst-case surge |
| PPPM | 600 W - surge energy absorption capacity per IEC 61000-4-5 waveform |
| TJ max | +150 °C - enables operation in high-temperature automotive under-hood locations |
| Qualification | AEC-Q101 qualified - validated for automotive electronic control units and sensor modules |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.2 mm height and 3.94 mm length |
Pinout & Package
SM6T30CAHE3_B/I is a two-terminal bidirectional TVS diode in SMB (DO-214AA) package; no polarity marking is applied. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No functional distinction - either terminal accepts transient energy in either direction |
| Case (SMB body) | Thermal and mechanical interface | Non-conductive molded compound meeting UL 94 V-0; provides mechanical mounting and heat dissipation path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges in 12 V automotive systems |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS sensors, and infotainment power supplies per stress test requirements |
| Glass passivated junction | Ensures stable VBR and leakage performance across temperature (-65 °C to +150 °C) and lifetime |
| Low clamping voltage (41.5 V @ 14.5 A) | Protects 3.3 V/5 V/12 V logic and analog circuitry downstream without overstressing IC inputs |
| MSL Level 1 (260 °C) | Supports lead-free reflow assembly without preconditioning or special handling |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Transceiver Protection |
|---|---|
Use Scenario: Protects LIN bus and power supply inputs in BCMs exposed to load dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Bidirectional clamping device placed at power entry and signal line terminations to limit transient voltages below IC absolute maximum ratings. Use Value: Maintains system uptime by preventing latch-up or permanent damage to microcontrollers and driver ICs during vehicle battery disconnection events. | Use Scenario: Shields CAN FD transceivers (e.g., TCAN1042, SN65HVD256) from ESD and coupled noise on industrial fieldbus wiring. IC Role / Device Role / Timing Role: Low-inductance TVS placed directly at connector interface to clamp fast transients before they propagate into signal conditioning circuitry. Use Value: Preserves bit error rate (BER) integrity by limiting common-mode voltage excursions to < ±45 V during 8/20 μs surges up to 10 A. |
| Automotive Occupant Detection Sensor | Smart Lighting Driver Input Stage |
Use Scenario: Safeguards capacitive or piezoresistive occupant detection sensors connected to airbag control units against ESD and cable discharge events. IC Role / Device Role / Timing Role: Front-end transient suppressor on sensor analog output lines and supply rails, operating within strict leakage budget (<1 μA at 30 V). Use Value: Prevents false triggering or calibration drift by suppressing sub-100 ns ESD pulses while maintaining DC accuracy of millivolt-level sensor signals. | Use Scenario: Protects constant-current LED drivers (e.g., AL8863, LT3762) from input surges caused by hot-plug events or power rail instability in architectural lighting systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input rail, coordinated with upstream fuse and downstream LC filtering to meet IEC 61000-4-4 Level 4 immunity. Use Value: Extends driver IC lifetime by limiting input voltage to ≤42 V during 1 kV/500 A surge events, avoiding internal LDO or gate driver failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | 400 W PPPM (vs. 600 W); same VWM/VBR range; SMA package (larger RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where higher IPPM required | Select when board space allows larger SMA footprint and surge energy demand is ≤400 W |
| 1.5KE30CA | Through-hole DO-201 package; 1500 W PPPM; higher VC (48.8 V @ 31 A); no AEC-Q101 qualification | Not suitable for SMT production or automotive qualification; used in legacy industrial power supplies | Choose only for through-hole prototyping or non-automotive applications requiring >600 W surge rating |
Compared with SMAJ30CA and 1.5KE30CA, SM6T30CAHE3_B/I offers superior surge robustness in compact SMB format with automotive-grade reliability - making it optimal for space-constrained, high-volume automotive electronics where both AEC-Q101 compliance and 600 W clamping are mandatory.
Availability
SM6T30CAHE3_B/I is available at Aetrix Electronics and suitable for automotive body control modules, industrial CAN bus interfaces, and smart lighting driver designs requiring stable component supply, AEC-Q101 qualification, and consistent SMB package sourcing.
Supply support for SM6T30CAHE3_B/I 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 is designed specifically for surface-mount transient voltage suppression in automotive, industrial, and communications equipment - delivering high-power clamping in low-profile packages with AEC-Q101 and RoHS compliance built-in.
FAQ
What is the clamping voltage of SM6T30CAHE3_B/I at its rated peak pulse current?
The SM6T30CAHE3_B/I has a maximum clamping voltage (VC) of 41.5 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 14.5 A. This value is measured under standardized test conditions per JEDEC standards and reflects the actual voltage seen by protected circuitry during surge events. The SM6T30CAHE3_B/I maintains this clamping performance across its full operating temperature range of -65 °C to +150 °C.
Is SM6T30CAHE3_B/I suitable for automotive applications?
Yes, SM6T30CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101 qualified construction. It meets MSL Level 1 reflow requirements (260 °C peak), operates from -65 °C to +150 °C, and is validated for under-hood and cabin electronics including ECUs, sensor interfaces, and LIN/CAN nodes. The SM6T30CAHE3_B/I data sheet confirms qualification per AEC-Q101 Rev D stress test conditions.
What does the "CA" suffix indicate in SM6T30CAHE3_B/I?
The "CA" suffix in SM6T30CAHE3_B/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with matched breakdown voltages (VBR) and clamping behavior. Unlike unidirectional variants (e.g., SM6T30A), SM6T30CAHE3_B/I has no cathode band marking and is used where AC signals, differential buses, or polarity-agnostic protection is required. This is confirmed in the Vishay SM6T datasheet section "Devices for Bidirectional Applications".
What is the thermal resistance of SM6T30CAHE3_B/I, and how does it affect layout design?
The SM6T30CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard SMB pad layout per Vishay's recommended footprint. To maintain safe junction temperatures during repeated surges, designers must provide adequate copper area and avoid excessive trace impedance. The SM6T30CAHE3_B/I thermal performance is optimized for this pad size - reducing pad area increases RθJA and risks thermal runaway during high-duty-cycle transients.
How does SM6T30CAHE3_B/I compare to unidirectional SM6T30AHE3_B/I in circuit implementation?
SM6T30CAHE3_B/I differs from SM6T30AHE3_B/I in polarity: SM6T30CAHE3_B/I is bidirectional with no polarity marking and identical VBR in both directions, while SM6T30AHE3_B/I is unidirectional with a cathode band and conducts only in reverse bias. In practice, SM6T30CAHE3_B/I replaces two unidirectional diodes in back-to-back configuration for AC line protection, simplifying layout and reducing component count. Both share identical SMB package, power rating, and AEC-Q101 qualification - but SM6T30CAHE3_B/I must not be substituted where DC bias or polarity-sensitive clamping is required.
SM6T30CAHE3_B/I 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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T30CAHE3_B/I FAQ
1.How can I place an order for SM6T30CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30CAHE3_B/I 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 SM6T30CAHE3_B/I reliable?
The price and inventory of SM6T30CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T30CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T30CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30CAHE3_B/I?
SM6T30CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30CAHE3_B/I 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 SM6T30CAHE3_B/I?
For technical support, including SM6T30CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30CAHE3_B/I requirements.
6.How does Aetrix verify that SM6T30CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T30CAHE3_B/I 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 SM6T30CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T30CAHE3_B/I?
All SM6T30CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30CAHE3_B/I, 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 SM6T30CAHE3_B/I part is unused and in its original packaging.
Return procedure for SM6T30CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30CAHE3_B/I Tags
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