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Vishay General Semiconductor - Diodes Division SM6T33CAHE3_A/H
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- Part No.:
- SM6T33CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T33CAHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
SM6T33CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 33 V standoff voltage (VWM), 37.1–41.0 V breakdown (VBR at 1 mA), and 600 W peak pulse power (10/1000 μs). It clamps transients to ≤59 V at 13.1 A, operates from −65 °C to +150 °C, and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SM6T33CAHE3_A/H datasheet, SM6T33CAHE3_A/H pinout, SM6T33CAHE3_A/H application, or SM6T33CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage under 600 W surge, AEC-Q101 qualification status, SMB footprint compatibility, and reverse leakage <1.0 μA at 28.2 V.
Technical Context
The SM6T33CAHE3_A/H implements a glass-passivated silicon junction with symmetrical bidirectional avalanche behavior, enabling identical clamping in both polarities without external polarity management. Its low-inductance SMB package supports fast response to ESD and lightning-induced transients.
Designed for unclamped inductive switching events and ISO 7637-2/IEC 61000-4-5 compliant surges, it delivers stable clamping performance up to 150 °C junction temperature and meets J-STD-020 MSL Level 1 reflow requirements with 260 °C peak profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤59 V at 13.1 A (10/1000 μs) - Actual voltage seen by protected circuit during 600 W surge; critical for IC/MOSFET survival |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability per IEC 61000-4-5 waveform; enables robust front-end protection |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Negligible standby current; avoids signal distortion or battery drain in always-on systems |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; matte tin-plated leads, RoHS-compliant and halogen-free (HM3-grade construction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction terminals | No functional distinction between terminals; interchangeable in PCB layout; enables single-component protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without cascaded protection stages |
| Low clamping voltage (≤59 V @ 13.1 A) | Protects 3.3 V/5 V/12 V logic and power rails while maintaining safe margin below MOSFET VDS(max) or IC absolute maximum ratings |
| AEC-Q101 qualification | Validated for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without moisture sensitivity handling or baking |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines or supply-to-ground to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to transceivers such as TJA1042 or MCP2561 while maintaining signal integrity due to low capacitance and symmetrical clamping. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer interfaces in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Primary line-to-line and line-to-ground transient suppressor on twisted-pair data lines, mounted adjacent to connector entry points. Use Value: Maintains >1 Mbps data integrity during 1 kV/μs common-mode surges by limiting voltage excursion to <60 V, avoiding receiver saturation or false triggering. |
| Consumer Power Adapter Input | Telecom DC Power Feeding |
Use Scenario: Secondary-side overvoltage suppression in USB PD and Qi wireless charging adapters subjected to capacitor discharge events and ESD. IC Role / Device Role / Timing Role: Fast-response shunt protector across 5–20 V output rails, triggered before downstream DC-DC controllers enter fault mode. Use Value: Limits output overshoot to <60 V during 8/20 μs surges, preventing damage to GaN FETs or USB-C controller ICs like CYPD3171. |
Use Scenario: DC power feed protection in PoE-powered remote radio units (RRUs) and fiber access nodes receiving −48 V DC from central office equipment. IC Role / Device Role / Timing Role: Bidirectional clamp on input power pair to absorb lightning-induced longitudinal surges and hot-swap transients. Use Value: Withstands repeated 600 W pulses without degradation, ensuring >10-year field life in outdoor telecom cabinets per Telcordia GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (larger footprint, higher RθJA) | Limited to lower-energy transients; not recommended for ISO 7637-2 Pulse 5a load dump simulation | Choose SMAJ33CA only if board space allows larger SMA and surge requirement is ≤400 W |
| 1.5KE33CA | Higher PPPM (1500 W) but axial DO-201 package; slower response due to higher parasitic inductance | Suitable for bulk AC line protection but incompatible with high-speed data lines or dense SMT layouts | Select 1.5KE33CA only for non-SMT, high-energy, low-frequency surge scenarios where PCB real estate permits through-hole mounting |
Compared with SMAJ33CA and 1.5KE33CA, the SM6T33CAHE3_A/H provides optimal balance of 600 W surge capacity, SMB footprint density, AEC-Q101 qualification, and sub-60 V clamping-making it the preferred choice for automotive and industrial SMT designs requiring validated reliability and compact layout.
Availability
SM6T33CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial CAN bus interface protection, and telecom DC power feeding requiring stable component supply and long-term lifecycle support.
Supply support for SM6T33CAHE3_A/H 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 and automotive-grade qualification.
The SM6T Series is engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure-delivering consistent clamping performance across temperature and lifetime under repetitive surge stress.
FAQ
What does the "CA" suffix indicate in SM6T33CAHE3_A/H?
The "CA" suffix in SM6T33CAHE3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T33A), SM6T33CAHE3_A/H has no cathode marking and functions identically in either polarity-ideal for protecting AC-coupled or differential signal paths without polarity constraints.
Is SM6T33CAHE3_A/H compatible with lead-free reflow processes?
Yes, SM6T33CAHE3_A/H is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the package is qualified for standard Pb-free SMT assembly without pre-baking or special handling.
How does the clamping voltage of SM6T33CAHE3_A/H compare to its breakdown voltage?
SM6T33CAHE3_A/H has a breakdown voltage (VBR) range of 37.1–41.0 V at 1 mA and clamps to ≤59 V at 13.1 A (10/1000 μs). This 18–21 V differential represents the dynamic voltage rise under surge current and confirms effective protection margin for 33 V nominal systems-ensuring downstream components see no more than 59 V during worst-case transients.
Does SM6T33CAHE3_A/H meet automotive qualification standards?
Yes, SM6T33CAHE3_A/H carries the HE3 suffix, indicating full AEC-Q101 qualification. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC-Q101 Rev D, making it approved for use in automotive powertrain, chassis, and ADAS modules where zero-field-failure reliability is mandated.
What is the thermal resistance of SM6T33CAHE3_A/H, and how does it affect power dissipation?
SM6T33CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation must be derated linearly-e.g., at 75 °C ambient, maximum continuous power drops to ~2.5 W-ensuring TJ remains ≤150 °C under sustained leakage conditions.
SM6T33CAHE3_A/H 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T33CAHE3_A/H FAQ
1.How can I place an order for SM6T33CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T33CAHE3_A/H 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 SM6T33CAHE3_A/H reliable?
The price and inventory of SM6T33CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T33CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T33CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T33CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T33CAHE3_A/H?
SM6T33CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T33CAHE3_A/H 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 SM6T33CAHE3_A/H?
For technical support, including SM6T33CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T33CAHE3_A/H requirements.
6.How does Aetrix verify that SM6T33CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T33CAHE3_A/H 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 SM6T33CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T33CAHE3_A/H?
All SM6T33CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T33CAHE3_A/H, 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 SM6T33CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM6T33CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T33CAHE3_A/H Tags
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