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Vishay General Semiconductor - Diodes Division SM15T15CAHE3/57T
- Part No.:
- SM15T15CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CAHE3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,122
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Product details
Overview
SM15T15CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM), 21.2 V clamping voltage at 71 A IPPM, and AEC-Q101 qualified for automotive applications. 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 SM15T15CAHE3/57T datasheet, SM15T15CAHE3/57T pinout, SM15T15CAHE3/57T application, or SM15T15CAHE3/57T equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, SMC package thermal data, and direct alternatives with documented voltage and current differences.
Technical Context
The SM15T15CAHE3/57T operates as a bidirectional avalanche diode, exhibiting symmetrical breakdown in both polarities with VBR min/max of 14.3 V / 15.8 V at 1 mA test current. Its clamping action limits transient voltages to ≤21.2 V at 71 A peak pulse current under 10/1000 μs waveform, with low junction-to-lead thermal resistance (RθJL = 15 °C/W) enabling robust surge handling on standard PCB pads.
Designed for high-reliability automotive environments, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and maintains stable performance across -65 °C to +150 °C junction temperature range without polarity marking due to bidirectional symmetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 14.3 V to 15.8 V at 1 mA - Symmetrical avalanche initiation point in both directions; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 21.2 V at 71 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines safe IC/MOSFET stress level. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capability under standardized 10/1000 μs threat waveform; validates lightning/inductive immunity. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper, critical for repeated surge events. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking; case dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); molded compound UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction between terminals; either lead connects to protected line, other to ground or reference rail. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates protection against IEC 61000-4-5 Level 4 (4 kV) surges when system source impedance limits current to ≤71 A. |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS sensor modules requiring long-term field reliability. |
| Low clamping ratio (VC/VWM = 1.41) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices, preserving signal integrity. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly at 260 °C peak. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) over lifetime, even under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units against load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt transient energy before reaching sensitive input stages. Use Value: Maintains signal fidelity during 1500 W surges while holding clamped voltage ≤21.2 V-within absolute maximum ratings of automotive-grade op-amps and transceivers. |
Use Scenario: Safeguarding RS-485/RS-232 communication ports on PLCs and motor drives exposed to switching noise from adjacent 48 V DC power rails. IC Role / Device Role / Timing Role: Fast-response transient suppressor bridging differential pair to common-mode ground, suppressing common-mode surges up to ±21.2 V. Use Value: Prevents latch-up and permanent damage in interface ICs during 10/1000 μs transients induced by relay coil de-energization or contact arcing. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side surge suppression on 12 V/24 V DC outputs of wall adapters and PoE injectors subjected to ESD and conducted noise. IC Role / Device Role / Timing Role: Clamp device placed across output rails to limit overvoltage during hot-plug events or cable discharge events (CDE). Use Value: Limits output overshoot to ≤21.2 V during 71 A transients, preventing damage to connected USB-C PD controllers or battery management ICs. |
Use Scenario: Primary protection for Ethernet PHYs and DSL line drivers against lightning-induced surges entering via RJ-45 jacks in central office equipment. IC Role / Device Role / Timing Role: First-stage bidirectional TVS on twisted-pair inputs, absorbing bulk surge energy before secondary filtering and IC-level protection. Use Value: Handles 1500 W surges with <1 ns response time, reducing downstream filter component stress and extending system mean time between failures (MTBF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA-E3/57T | Lower PPPM (400 W), same VWM (15 V), higher VC (24.4 V at 24.4 A), SMA package (smaller footprint, lower thermal mass) | Not suitable for automotive or industrial lightning-level threats; limited to low-energy ESD and local switching noise. | Select only for space-constrained consumer electronics where 1500 W surge immunity is not required. |
| SMCJ15CAHE3/57T | Same VWM (15 V), identical SMC package, but higher PPPM (3000 W), lower VC (21.2 V at 143 A), AEC-Q101 qualified | Supports higher-energy threats (e.g., ISO 7637-2 Pulse 5a) and repeated surge duty cycles in harsh environments. | Choose when system-level testing requires >1500 W margin or extended surge endurance beyond SM15T series capability. |
Compared with SMAJ15CA-E3/57T, SM15T15CAHE3/57T delivers 275 % more surge power handling and tighter clamping; versus SMCJ15CAHE3/57T, it trades 1500 W headroom for lower cost and proven qualification in cost-sensitive automotive modules where 1500 W is sufficient.
Availability
SM15T15CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom line card designs requiring stable component supply with AEC-Q101 traceability and SMC package compatibility.
Supply support for SM15T15CAHE3/57T 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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SM15T series was engineered specifically for high-power transient suppression in automotive and industrial systems where 1500 W surge immunity, AEC-Q101 compliance, and SMC package thermal efficiency are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T15CAHE3/57T at its rated peak pulse current?
The SM15T15CAHE3/57T has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current (IPPM) of 71 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T15CAHE3/57T maintains this clamping performance across its full operating temperature range.
Is SM15T15CAHE3/57T suitable for automotive applications?
Yes, SM15T15CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev G, making it appropriate for engine control units, body electronics, and ADAS sensor interfaces. The SM15T15CAHE3/57T also meets MSL Level 1 for lead-free reflow compatibility.
What does the "CA" suffix indicate in SM15T15CAHE3/57T?
The "CA" suffix in SM15T15CAHE3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM15T15A), the SM15T15CAHE3/57T has no cathode band marking and functions identically regardless of terminal orientation-ideal for AC-coupled lines or differential buses like CAN or RS-485.
What is the thermal resistance from junction to ambient for SM15T15CAHE3/57T?
The typical junction-to-ambient thermal resistance (RθJA) for SM15T15CAHE3/57T is 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay document 88380. This value assumes standard PCB layout; actual RθJA improves significantly with larger copper areas or internal layers. The SM15T15CAHE3/57T's RθJL of 15 °C/W further supports effective heat conduction to leads.
How does SM15T15CAHE3/57T differ from SM15T15AHE3/57T?
The SM15T15CAHE3/57T is bidirectional with symmetrical breakdown and no polarity marking, while SM15T15AHE3/57T is unidirectional with a cathode band and only conducts in reverse bias. Their VWM (15 V) and VC (21.2 V) match, but SM15T15AHE3/57T supports 200 A IFSM and exhibits polarity-dependent forward conduction-making SM15T15CAHE3/57T the correct choice for AC or differential signal protection where polarity cannot be guaranteed.
SM15T15CAHE3/57T 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15CAHE3/57T FAQ
1.How can I place an order for SM15T15CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CAHE3/57T 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 SM15T15CAHE3/57T reliable?
The price and inventory of SM15T15CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T15CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CAHE3/57T?
SM15T15CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CAHE3/57T 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 SM15T15CAHE3/57T?
For technical support, including SM15T15CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CAHE3/57T requirements.
6.How does Aetrix verify that SM15T15CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T15CAHE3/57T 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 SM15T15CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T15CAHE3/57T?
All SM15T15CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CAHE3/57T, 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 SM15T15CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T15CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15CAHE3/57T Tags
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