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Vishay General Semiconductor - Diodes Division SM15T33CAHE3/57T
- Part No.:
- SM15T33CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33CAHE3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,748
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Product details
Overview
SM15T33CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33 V standoff voltage (VWM), 37.5 V max clamping voltage at 33 A IPPM, and AEC-Q101 qualified for automotive use. It protects signal lines and power rails in sensor units and I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T33CAHE3/57T datasheet, SM15T33CAHE3/57T pinout, SM15T33CAHE3/57T application, or SM15T33CAHE3/57T equivalent, key selection criteria include bidirectional clamping behavior, 33 V VWM tolerance, 1500 W surge rating, AEC-Q101 qualification status, and SMC package thermal performance under high-impedance transient conditions.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and low dynamic impedance during transient events.
Designed for high-energy threat suppression, it delivers 33 A peak pulse current (IPPM) at 37.5 V clamping while maintaining thermal resistance of 15 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 3.3 V–24 V rail protection. |
| VBR (min/max) | 31.4 V / 34.7 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 37.5 V at 33 A - Clamping voltage under 10/1000 μs surge; limits downstream voltage stress to <14% above VWM. |
| PPPM | 1500 W - Peak pulse power handling capability; supports protection against IEC 61000-4-5 Level 4 (4 kV) surges with appropriate source impedance. |
| TJ max. | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated reflow assembly per J-STD-020 MSL Level 1. |
Pinout & Package
SM15T33CAHE3/57T uses a 2-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction between terminals; either lead may connect to line or ground-enables flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-supports deployment in ADAS sensors and body control modules. |
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching and lightning coupling without degradation-no derating required below 85 °C ambient. |
| Low clamping ratio (VC/VBR ≈ 1.19) | Minimizes overvoltage exposure to protected ICs; critical for safeguarding 3.3 V and 5 V logic interfaces with tight VIH/VIL margins. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns-eliminates baking requirements in high-volume manufacturing. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional shunt clamp absorbing ±300 V/10 A transients while holding line voltage ≤37.5 V. Use Value: Prevents latch-up and gate oxide damage in transceivers; maintains communication integrity during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog input channels on PLC analog I/O modules exposed to 24 V DC field wiring. IC Role / Device Role / Timing Role: Fast-response voltage limiter clamping induced surges from relay coil de-energization. Use Value: Enables >100,000 surge cycles without parameter shift; eliminates need for external series impedance or RC filtering. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Shielding USB-C PD controller power path from ESD and AC line-coupled surges in wall adapters. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp placed directly at connector entry point. Use Value: Maintains signal integrity up to 100 MHz; passes IEC 61000-4-2 Level 4 (±15 kV contact) without data corruption. |
Use Scenario: Front-end protection of Ethernet PHY interfaces on telecom base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt element in multi-stage protection scheme with upstream gas discharge tube. Use Value: Limits let-through voltage to <40 V during 10/1000 μs 1.2 kA surge-preserves PHY IC's absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/57T | Lower PPPM (400 W), same VWM (33 V), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade I/O where surge energy ≤400 W | Select when board space is constrained and surge threats are limited to ESD and low-energy switching noise. |
| SMCJ33CAHE3/57T | Higher PPPM (3000 W), identical VWM/VC/temperature rating, same SMC package but non-AEC-Q101 grade | Lacks automotive qualification; requires separate reliability validation for automotive programs | Choose for industrial motor drives requiring higher surge margin but no AEC-Q101 compliance mandate. |
Compared with SMAJ33CA-E3/57T and SMCJ33CAHE3/57T, SM15T33CAHE3/57T uniquely balances 1500 W surge capacity, AEC-Q101 qualification, and SMC thermal performance-making it optimal for cost-sensitive automotive and industrial designs needing validated reliability without over-engineering.
Availability
SM15T33CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O ports, consumer power adapter interfaces, and telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SM15T33CAHE3/57T 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 SM15T Series is engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure modes must be controlled and AEC-Q101 compliance is mandatory.
FAQ
What does the "CA" suffix indicate in SM15T33CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration: SM15T33CAHE3/57T provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SM15T33A). This allows it to protect AC-coupled signals or DC lines subject to reverse-polarity faults without requiring polarity-aware placement on the PCB.
Is SM15T33CAHE3/57T suitable for protecting USB 2.0 data lines?
No-SM15T33CAHE3/57T has typical junction capacitance >100 pF at zero bias, which exceeds the 5–10 pF limit for USB 2.0 full-speed signaling. It is intended for power rails and low-frequency I/O (e.g., CAN, LIN, analog inputs), not high-speed differential data lines.
Does SM15T33CAHE3/57T require a heatsink for standard operation?
No external heatsink is required. With RθJL = 15 °C/W and PD = 6.5 W, SM15T33CAHE3/57T dissipates heat effectively through its SMC package leads into PCB copper pads. Mounting on 8.0 mm × 8.0 mm copper pads per terminal ensures thermal performance meets spec at TA ≤ 85 °C.
How does the AEC-Q101 qualification impact SM15T33CAHE3/57T's use in non-automotive applications?
AEC-Q101 qualification confirms enhanced robustness-including extended temperature cycling, HTRB, and ESD testing-making SM15T33CAHE3/57T highly reliable in demanding industrial or outdoor deployments. Its qualification adds margin but does not restrict usage to automotive systems.
What is the maximum recommended PCB pad size for SM15T33CAHE3/57T to achieve rated IPPM?
To achieve the full 33 A IPPM rating, Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Smaller pads reduce thermal dissipation and derate IPPM; using minimum recommended pad layout ensures compliance with the 1500 W peak pulse power specification.
SM15T33CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T33CAHE3/57T FAQ
1.How can I place an order for SM15T33CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33CAHE3/57T 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 SM15T33CAHE3/57T reliable?
The price and inventory of SM15T33CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T33CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T33CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33CAHE3/57T?
SM15T33CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33CAHE3/57T 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 SM15T33CAHE3/57T?
For technical support, including SM15T33CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33CAHE3/57T requirements.
6.How does Aetrix verify that SM15T33CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T33CAHE3/57T 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 SM15T33CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T33CAHE3/57T?
All SM15T33CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33CAHE3/57T, 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 SM15T33CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T33CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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