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Vishay General Semiconductor - Diodes Division SM15T100A-E3/57T
- Part No.:
- SM15T100A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T100A-E3/57T.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
SM15T100A-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 137 V clamping voltage at 11.0 A peak pulse current, and 85.5 V stand-off voltage. It protects MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T100A-E3/57T datasheet, SM15T100A-E3/57T pinout, SM15T100A-E3/57T application, or SM15T100A-E3/57T equivalent, key selection criteria include clamping voltage (VC = 137 V), stand-off voltage (VWM = 85.5 V), peak pulse current (IPPM = 11.0 A), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
The SM15T100A-E3/57T operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp transient overvoltages above its breakdown threshold (VBR min = 95.0 V, max = 105 V at IT = 1.0 mA) while maintaining low leakage (ID ≤ 1.0 μA at VWM). Its low-inductance SMC package enables fast response to sub-microsecond transients.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C and operating range from –65 °C to +150 °C. Failure mode under overstress is short-circuit, consistent with industrial surge protection requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 95.0 V / 105 V at 1.0 mA - Confirmed avalanche breakdown range ensures reliable turn-on margin |
| VC @ IPPM | 137 V at 11.0 A (10/1000 μs) - Clamping voltage defines worst-case voltage seen by protected circuit |
| PPPM | 1500 W - Peak transient energy absorption capability per standardized waveform |
| IFSM | 200 A - Surge current rating for 10 ms half-sine wave, critical for motor drive I/O protection |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without derating |
| Package | SMC (DO-214AB) - Surface-mount footprint with 0.305" × 0.320" outline and J-STD-020 MSL Level 1 compliance |
Pinout & Package
SM15T100A-E3/57T uses the standard SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per JEDEC recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit point during forward conduction; high-impedance node during reverse stand-off | Connected to protected line (e.g., 12 V rail, CAN H); band-marked end identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V/24 V systems |
| Glass passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for automotive field reliability |
| AEC-Q101 qualified (via HE3/HM3 variants) | Validated for automotive applications including engine control units and body electronics |
| Low inductance SMC package | Minimizes voltage overshoot during fast transients (<100 ns rise time), preserving clamping integrity |
| RoHS-compliant, halogen-free options | Supports environmental compliance for global OEM supply chains without performance trade-offs |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input stage of power management IC. Use Value: Clamps transients to ≤137 V, preventing damage to downstream DC/DC converters rated for 16 V input. | Use Scenario: Safeguarding PLC digital output channels driving solenoids and contactors subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS across relay coil terminals to absorb stored magnetic energy. Use Value: Absorbs 200 A surge (IFSM) and limits voltage to 137 V, eliminating need for snubber RC networks. |
| Telecom Line Interface Protection | Consumer Appliance Power Supply Input |
Use Scenario: Shielding Ethernet PHY power pins from ESD and surge events in outdoor base stations. IC Role / Device Role / Timing Role: Secondary-level TVS after primary GDT or MOV, providing precise clamping near IC tolerance limits. Use Value: Low leakage (≤1.0 μA) avoids loading sensitive bias networks; 137 V VC aligns with 100 V-rated Ethernet magnetics. | Use Scenario: Input-stage transient suppression on AC-DC adapter front-end for smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bus prior to buck controller IC. Use Value: 1500 W rating handles repeated 1.2/50 μs surges from shared building wiring without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A | Lower PPPM (400 W), higher VC (165 V at 5.5 A), same SMC package | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats | Select SMAJ100A only when cost sensitivity outweighs surge margin and clamping tightness |
| 1.5KE100A | Higher VWM (85.5 V same), but axial DO-201 package (not SMT), larger footprint, no AEC-Q101 option | Requires through-hole assembly; incompatible with automated SMT lines and space-constrained PCBs | Choose 1.5KE100A only for legacy through-hole designs where rework to SMC is not feasible |
Compared with SMAJ100A and 1.5KE100A, SM15T100A-E3/57T delivers 275 % higher peak power handling, 20 % lower clamping voltage, and full SMT compatibility-making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 compliance and high-density layout.
Availability
SM15T100A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom line interface applications requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for SM15T100A-E3/57T 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, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure modes must be predictable and clamping precision non-negotiable.
FAQ
What is the clamping voltage of SM15T100A-E3/57T at its rated peak pulse current?
The SM15T100A-E3/57T has a maximum clamping voltage (VC) of 137 V when subjected to its specified peak pulse current of 11.0 A using the 10/1000 μs waveform. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T100A-E3/57T maintains this clamping performance across its operational temperature range.
Is SM15T100A-E3/57T qualified for automotive applications?
SM15T100A-E3/57T itself is RoHS-compliant commercial-grade; however, the AEC-Q101 qualified version is designated as SM15T100AHE3_A (with "HE3" suffix). The SM15T100A-E3/57T shares identical electrical and thermal characteristics with the qualified variant but lacks formal automotive qualification documentation. For production automotive use, SM15T100AHE3_A is required; SM15T100A-E3/57T serves prototyping and industrial applications.
What is the standoff voltage (VWM) and why is it critical for SM15T100A-E3/57T placement?
The standoff voltage (VWM) of SM15T100A-E3/57T is 85.5 V - the maximum continuous reverse voltage it can block without entering avalanche conduction. This parameter dictates placement relative to system operating voltage: it must exceed normal rail voltage (e.g., 12 V, 24 V, or 48 V systems) with sufficient margin to avoid leakage or thermal runaway. In a 100 V nominal system, SM15T100A-E3/57T provides 14.5 V margin before clamping initiates.
Does SM15T100A-E3/57T have bidirectional capability?
No, SM15T100A-E3/57T is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SM15T100CA). Using SM15T100A-E3/57T in AC or bipolar signal paths would result in forward conduction during negative half-cycles, causing failure. For bidirectional protection, select SM15T100CA-E3/57T or equivalent.
What is the thermal resistance and how does it affect SM15T100A-E3/57T layout?
The SM15T100A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. Layout must provide minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve these values. Reducing pad area increases RθJA, risking thermal runaway during repetitive surges. The SM15T100A-E3/57T datasheet specifies this pad size as mandatory for rated power dissipation.
SM15T100A-E3/57T 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T100A-E3/57T FAQ
1.How can I place an order for SM15T100A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T100A-E3/57T 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 SM15T100A-E3/57T reliable?
The price and inventory of SM15T100A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T100A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T100A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T100A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T100A-E3/57T?
SM15T100A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T100A-E3/57T 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 SM15T100A-E3/57T?
For technical support, including SM15T100A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T100A-E3/57T requirements.
6.How does Aetrix verify that SM15T100A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T100A-E3/57T 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 SM15T100A-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T100A-E3/57T?
All SM15T100A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T100A-E3/57T, 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 SM15T100A-E3/57T part is unused and in its original packaging.
Return procedure for SM15T100A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T100A-E3/57T Tags
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