My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T24A-E3/9AT
- Part No.:
- SM15T24A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24A-E3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T24A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 24 V standoff voltage (VWM = 20.5 V), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage at 45 A IPPM, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T24A-E3/9AT datasheet, SM15T24A-E3/9AT pinout, SM15T24A-E3/9AT application, or SM15T24A-E3/9AT equivalent, key selection criteria include clamping voltage under 45 A surge, unidirectional polarity with cathode band marking, RoHS-compliant matte tin terminals, and thermal resistance (RθJA = 75 °C/W) for PCB pad-limited cooling in space-constrained layouts.
Technical Context
The SM15T24A-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, designed to clamp transient overvoltages before they damage downstream components. Its low-inductance SMC package and 1500 W peak pulse capability enable robust protection against 10/1000 μs lightning surges and switching transients from motors or coils.
It exhibits unidirectional polarity with cathode-band marking, requires no bias circuitry, and fails short-circuit under overstress-enabling predictable system-level fault containment. Thermal performance is defined for 0.31" × 0.31" copper pads per terminal, with RθJL = 15 °C/W indicating efficient lead-to-PCB heat transfer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for normal circuit operation. |
| VBR (min) | 22.8 V - Minimum breakdown voltage at 1 mA test current; ensures reliable conduction onset during transients. |
| VC @ IPPM | 33.2 V at 45 A - Clamping voltage under 10/1000 μs surge; defines worst-case voltage seen by protected IC/MOSFET. |
| PPPM | 1500 W - Peak pulse power handling per standard waveform; determines survivability against lightning or inductive spikes. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended pad layout; governs temperature rise under sustained 6.5 W dissipation. |
| Polarity | Unidirectional - Cathode-band marked; blocks forward current, clamps reverse transients only. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
SM15T24A-E3/9AT uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and polarity indicated by a cathode band on one end. Leads are solderable per J-STD-002 and JESD 22-B102, with MSL level 1 rating and 260 °C peak reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return node; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to line being protected (e.g., 24 V rail or sensor input); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges without external series impedance. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime, critical for automotive reliability. |
| Low inductance SMC package | Minimizes voltage overshoot during fast transients (e.g., <100 ns edges), improving clamping response vs. larger packages. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring stress-tested TVS devices per qualified process flow. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails and CAN/LIN bus interfaces in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp positive-going surges above 33.2 V. Use Value: Prevents latch-up or gate oxide damage in MCU power regulators and transceiver ICs during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding analog sensor inputs (e.g., RTD, thermocouple) and digital I/O lines in PLC analog input modules from motor switching noise. IC Role / Device Role / Timing Role: Standoff-connected TVS on each signal line, referenced to common ground, absorbing coupled 1–2 kV transients. Use Value: Maintains sub-1 LSB measurement accuracy by limiting transient-induced offset shift and preventing ADC saturation. |
| Telecom DC Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding PoE-powered equipment front-end circuits against induced surges on 48 V DC input lines from nearby AC wiring. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with upstream fuse and downstream DC-DC converter input capacitor. Use Value: Limits input voltage excursion to ≤33.2 V during 10/1000 μs surges, preserving input stage MOSFETs and enabling single-stage protection architecture. | Use Scenario: Protecting microcontroller GPIOs and relay driver outputs in washing machine main control boards exposed to solenoid coil back-EMF. IC Role / Device Role / Timing Role: Local TVS mounted adjacent to each relay coil output, with cathode tied to MCU output pin and anode to ground. Use Value: Suppresses >600 V flyback spikes within 100 ns, eliminating need for snubber RC networks and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | 600 W PPPM, 38.9 V VC @ 26.7 A, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or high-IFSM environments | Select when board space is constrained and surge threat level is ≤1 kV, 500 W. |
| SMCJ24A | 1500 W PPPM, identical clamping (33.2 V @ 45 A), same SMC package but higher VBR min (24.0 V vs. 22.8 V) | Marginally higher turn-on threshold; may delay clamping by ~20 ns on sub-VBR transients | Prefer for designs requiring tighter VBR tolerance or where AEC-Q101 qualification is mandatory (SMCJ24AHE3 available). |
Compared with SMAJ24A and SMCJ24A, the SM15T24A-E3/9AT offers identical 1500 W surge rating and clamping performance as SMCJ24A but with lower VBR onset-enabling earlier transient suppression-while providing significantly higher energy handling than SMAJ24A in the same SMC footprint.
Availability
SM15T24A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom DC power feeds requiring stable component supply, RoHS compliance, and traceable sourcing for production programs.
Supply support for SM15T24A-E3/9AT 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS, and MOSFETs with emphasis on reliability, power handling, and automotive-grade qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting applications where 1500 W surge immunity, low clamping voltage, and AEC-Q101 readiness are required-especially in 12 V/24 V/48 V power systems.
FAQ
What is the maximum clamping voltage of the SM15T24A-E3/9AT under a 10/1000 μs surge?
The SM15T24A-E3/9AT has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current (IPPM) of 45 A with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the SM15T24A-E3/9AT RoHS-compliant and halogen-free?
The SM15T24A-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant and commercial grade, but not halogen-free. For halogen-free compliance, the "M3" variant (e.g., SM15T24A-M3/9AT) must be selected, as specified in the Mechanical Data section of Vishay document 88380.
Does the SM15T24A-E3/9AT have AEC-Q101 qualification?
The base SM15T24A-E3/9AT is not AEC-Q101 qualified. However, Vishay offers automotive-grade versions under ordering codes SM15T24AHE3_A/I (RoHS-compliant, AEC-Q101) and SM15T24AHM3_A/I (halogen-free, RoHS-compliant, AEC-Q101), both in 13" tape-and-reel packaging.
What is the thermal resistance and recommended PCB layout for the SM15T24A-E3/9AT?
The SM15T24A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as defined in Vishay document 88380. Use of smaller pads increases RθJA and reduces safe operating power dissipation.
How does the SM15T24A-E3/9AT differ from the SM15T24CA-E3/9AT?
The SM15T24A-E3/9AT is unidirectional with cathode-band marking, while SM15T24CA-E3/9AT is bidirectional (no polarity marking) and intended for AC or dual-polarity signal line protection. Their VBR, VWM, and VC ratings differ slightly due to symmetrical breakdown design in the CA variant, making them non-interchangeable without circuit review.
SM15T24A-E3/9AT 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45A
- 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)
SM15T24A-E3/9AT FAQ
1.How can I place an order for SM15T24A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24A-E3/9AT 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 SM15T24A-E3/9AT reliable?
The price and inventory of SM15T24A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T24A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24A-E3/9AT?
SM15T24A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24A-E3/9AT 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 SM15T24A-E3/9AT?
For technical support, including SM15T24A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24A-E3/9AT requirements.
6.How does Aetrix verify that SM15T24A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T24A-E3/9AT 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 SM15T24A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T24A-E3/9AT?
All SM15T24A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24A-E3/9AT, 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 SM15T24A-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T24A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24A-E3/9AT 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 …
