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Vishay General Semiconductor - Diodes Division 1.5SMC24AHE3/9AT
- Part No.:
- 1.5SMC24AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AHE3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,238
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Product details
Overview
1.5SMC24AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at 1 mA), 20.5 V stand-off voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC24AHE3/9AT datasheet, 1.5SMC24AHE3/9AT pinout, 1.5SMC24AHE3/9AT application, or 1.5SMC24AHE3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, clamping performance under repetitive transients, and thermal derating behavior above 25 °C ambient.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (20.5 V), it transitions from high-impedance blocking to low-impedance conduction at VBR (min. 22.8 V), limiting transient energy via controlled avalanche breakdown. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response (<1 ns).
The device is rated for 1500 W peak pulse power (10/1000 µs), 200 A non-repetitive forward surge current (8.3 ms half-sine), and operates across –65 °C to +150 °C junction temperature. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads, supporting reliable operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - defines precise avalanche onset threshold for repeatable clamping initiation |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during 1500 W transient, directly limiting downstream IC stress |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity for lightning and inductive switching events |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault conditions |
| TJ max. | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm height and 7.75 mm length for automated assembly |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| 1500 W peak pulse power | Withstands severe transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping, reducing risk of damage to downstream MOSFETs or microcontrollers |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability under thermal stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp transients before they reach sensitive interface ICs. Use Value: Clamps 33.2 V at 45.2 A, keeping protected ICs within absolute maximum ratings during ISO 16750-2 load dump events. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, mounted adjacent to connector to minimize inductance in surge path. Use Value: 1500 W pulse rating handles repetitive 10/1000 µs transients common in factory automation environments with minimal derating up to +105 °C ambient. |
| DC Power Rail Protection | Consumer Power Adapter Output Stage |
Use Scenario: Secondary-side overvoltage protection on 24 V DC power supplies feeding motor drivers or LED drivers. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals to limit fault voltage during regulator failure or cable short-circuit events. Use Value: 20.5 V stand-off allows normal regulation margin while 33.2 V clamping prevents downstream component overvoltage beyond 30 V-rated capacitors or MOSFETs. |
Use Scenario: Output-stage transient suppression in wall-mounted AC/DC adapters supplying USB-C PD or smart home devices. IC Role / Device Role / Timing Role: Final-line defense after filtering stage, absorbing residual surges that pass through Y-capacitors and common-mode chokes. Use Value: AEC-Q101 qualification and MSL Level 1 ensure reliability in high-volume consumer manufacturing with no special handling required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52T | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Suitable for space-constrained consumer designs where 1500 W rating is not required | Select when board area is critical and surge threat level is moderate (e.g., IEC 61000-4-2 only) |
| 1.5KE24A | Through-hole DO-201 package, same electrical specs but incompatible mounting and thermal profile | Used in legacy or high-reliability through-hole assemblies; not suitable for SMT production | Choose only for repair, prototyping, or mixed-technology boards where reflow compatibility is not needed |
Compared with 1.5SMC24AHE3/9AT, SMBJ24A-E3/52T offers smaller size but reduced surge handling and thermal margin, while 1.5KE24A provides identical clamping performance but requires manual or wave soldering - neither is pin-compatible, and both demand layout revision for replacement.
Availability
1.5SMC24AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and DC power supply designs requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for 1.5SMC24AHE3/9AT 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 leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 validation, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24AHE3/9AT under maximum rated surge current?
The 1.5SMC24AHE3/9AT has a maximum clamping voltage (VC) of 33.2 V when subjected to its peak pulse current (IPPM) of 45.2 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 1.5SMC24AHE3/9AT AEC-Q101 qualified, and what does that mean for automotive use?
Yes, the 1.5SMC24AHE3/9AT is AEC-Q101 qualified - confirmed by its "HE3" suffix and documentation in Vishay's 88303 datasheet. This qualification validates its reliability for automotive applications, including temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22 standards, making it suitable for under-hood and body-control module deployments.
What is the difference between the 1.5SMC24AHE3/9AT and the 1.5SMC24AHE3/57T packaging variants?
The 1.5SMC24AHE3/9AT uses a 13-inch diameter plastic tape-and-reel carrier with 3500 units per reel, whereas the 1.5SMC24AHE3/57T uses a 7-inch reel with 850 units. Both share identical electrical, thermal, and mechanical specifications; the distinction is purely logistical - 9AT supports high-volume SMT line feeding, while 57T suits lower-volume or prototype runs.
Can the 1.5SMC24AHE3/9AT be used in bidirectional applications?
No - the 1.5SMC24AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "CA", such as 1.5SMC24CAHE3/9AT. Using the unidirectional 1.5SMC24AHE3/9AT in AC or symmetrical transient scenarios would result in forward conduction during negative half-cycles and potential failure.
What is the maximum operating junction temperature and thermal resistance of the 1.5SMC24AHE3/9AT?
The 1.5SMC24AHE3/9AT has a maximum junction temperature (TJ) of +150 °C and a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pad per terminal. Derating curves in Figure 2 of the datasheet must be applied for ambient temperatures above 25 °C to maintain safe operation.
1.5SMC24AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 45.2A
- 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)
1.5SMC24AHE3/9AT FAQ
1.How can I place an order for 1.5SMC24AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AHE3/9AT 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 1.5SMC24AHE3/9AT reliable?
The price and inventory of 1.5SMC24AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AHE3/9AT?
1.5SMC24AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AHE3/9AT 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 1.5SMC24AHE3/9AT?
For technical support, including 1.5SMC24AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC24AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AHE3/9AT 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 1.5SMC24AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AHE3/9AT?
All 1.5SMC24AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AHE3/9AT, 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 1.5SMC24AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC24AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24AHE3/9AT Tags
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