My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T30A-E3/57T
- Part No.:
- SM15T30A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30A-E3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T30A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM = 25.6 V), 41.5 V clamping voltage at 36 A IPPM, and 150 °C max junction temperature - deployed to protect MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30A-E3/57T datasheet, SM15T30A-E3/57T pinout, SM15T30A-E3/57T application, or SM15T30A-E3/57T equivalent, key selection criteria include verified clamping performance at 36 A, unidirectional polarity with cathode band marking, RoHS-compliant matte tin-plated leads, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage exceeding its breakdown threshold (VBR min = 28.5 V), it avalanches to divert surge current away from downstream circuitry while maintaining VC ≤ 41.5 V at IPPM = 36 A. Its low-inductance SMC package and glass-passivated junction ensure fast response (< 1 ns) and stable clamping across temperature.
Designed for high-impedance source environments, SM15T30A-E3/57T sustains single-pulse threats up to 1500 W without degradation when mounted on 8.0 mm × 8.0 mm copper pads; thermal resistance RθJA = 75 °C/W enables operation up to TJ = 150 °C with appropriate board-level heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1.0 mA - precise avalanche initiation range ensuring consistent turn-on during transients. |
| VC (Clamping Voltage) | 41.5 V at IPPM = 36 A (10/1000 μs) - limits voltage seen by protected IC/MOSFET during worst-case surge. |
| PPPM (Peak Pulse Power) | 1500 W - supports robust protection against lightning surges and motor-switching transients per IEC 61000-4-5. |
| IFSM (Surge Current) | 200 A (10 ms half-sine) - withstands repetitive inrush or fault currents without failure. |
| TJ max | 150 °C - enables use in under-hood automotive and industrial environments with elevated ambient temperatures. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche diode | Connected to protected line; conducts surge current to ground when transient exceeds VBR. |
| Anode | Cathode of internal avalanche diode | Typically tied to system ground; completes shunt path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges per IEC 61000-4-5 Level 4 without derating. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR/VWM parameters across humidity and thermal cycling. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) due to < 1 nH parasitic inductance. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, halogen-free option available | Meets global environmental compliance mandates including JEDEC JESD201 Class 2 whisker resistance. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 24 V DC power rails in body control modules from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS shunt clamp placed between battery rail and downstream PMIC or microcontroller power input. Use Value: Clamps transients to ≤41.5 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream of DC-DC converters. |
Use Scenario: Safeguarding analog sensor inputs (e.g., current sense, temperature) connected to PLC analog input cards. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal lines exposed to inductive kickback from solenoid valves or contactors. Use Value: Limits induced voltage spikes to <42 V, preserving ADC accuracy and preventing input-stage saturation or ESD latch-up. |
| Telecom Line Interface Protection | Consumer Appliance Power Supply Input |
Use Scenario: Shielding Ethernet PHY interface power pins (e.g., PoE midspan injectors) from surge coupling via shared chassis grounds. IC Role / Device Role / Timing Role: Secondary-level TVS on 3.3 V/5 V bias rails feeding magnetics or isolation transformers. Use Value: Absorbs coupled 1 kV/500 A surges without degrading signal integrity or requiring additional series impedance. |
Use Scenario: Guarding primary-side rectifier outputs in switch-mode power supplies of washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Clamp device across bulk capacitor terminals to suppress switching noise and transformer leakage spikes. Use Value: Maintains VWM margin above 25.6 V while clamping to 41.5 V, avoiding false triggering during normal 24 V/48 V bus ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30A | Same SMC package, identical VWM (25.6 V), but lower PPPM = 400 W and higher VC = 48.4 V at 8.3 A IPPM. | Suitable only for lower-energy threats; not recommended for lightning-survivable designs per IEC 61000-4-5. | Select SM15T30A-E3/57T when 1500 W surge handling and tighter clamping are required. |
| ON Semiconductor 1.5SMC30A | Identical electrical specs (VWM = 25.6 V, VC = 41.5 V @ 36 A), same SMC package, but rated only to TJ = 125 °C and lacks AEC-Q101 qualification path. | Acceptable for commercial-grade industrial use, but not validated for automotive under-hood deployment. | Choose SM15T30A-E3/57T for automotive-qualified supply chains or extended temperature operation. |
Compared with SMAJ30A and 1.5SMC30A, SM15T30A-E3/57T delivers superior energy handling (1500 W vs. 400 W/1500 W), identical clamping performance, and formal AEC-Q101 qualification eligibility - making it the preferred choice for automotive and high-reliability industrial surge protection where thermal margin and certification matter.
Availability
SM15T30A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom line interface protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SM15T30A-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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and application-specific validation.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be benign (short-circuit) and performance must remain stable over temperature and lifetime.
FAQ
What is the clamping voltage of SM15T30A-E3/57T at its rated peak pulse current?
The SM15T30A-E3/57T has a maximum clamping voltage (VC) of 41.5 V when subjected to a 10/1000 μs waveform at its peak pulse current (IPPM) of 36 A. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads, ensuring repeatable performance for system-level surge design.
Is SM15T30A-E3/57T suitable for automotive applications?
SM15T30A-E3/57T itself is RoHS-compliant commercial grade (E3 suffix), but the SM15T30AHE3 variant is AEC-Q101 qualified. While SM15T30A-E3/57T shares identical electrical and thermal specs, automotive qualification requires the HE3 suffix; users needing certified parts should specify SM15T30AHE3_A/H or SM15T30AHE3_A/I.
What does the "-E3/57T" suffix indicate in SM15T30A-E3/57T?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "57T" specifies the packaging format: 7-inch diameter plastic tape and reel containing 850 units. This ordering code ensures compatibility with standard SMT pick-and-place equipment and meets J-STD-002 solderability requirements.
How does SM15T30A-E3/57T differ from bidirectional TVS diodes like SM15T30CA?
SM15T30A-E3/57T is unidirectional and features a cathode band for polarity identification; it blocks forward current until VBR is exceeded in reverse. In contrast, SM15T30CA is bidirectional with symmetrical breakdown in both directions and no polarity marking - used where AC-coupled or differential signal lines require protection without polarity constraints.
What is the thermal resistance of SM15T30A-E3/57T, and how does it affect layout?
SM15T30A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper). To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks near the SMC footprint.
SM15T30A-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30A-E3/57T FAQ
1.How can I place an order for SM15T30A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30A-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 SM15T30A-E3/57T reliable?
The price and inventory of SM15T30A-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 SM15T30A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T30A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30A-E3/57T?
SM15T30A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30A-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 SM15T30A-E3/57T?
For technical support, including SM15T30A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30A-E3/57T requirements.
6.How does Aetrix verify that SM15T30A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T30A-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 SM15T30A-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T30A-E3/57T?
All SM15T30A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30A-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 SM15T30A-E3/57T part is unused and in its original packaging.
Return procedure for SM15T30A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30A-E3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
