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Vishay General Semiconductor - Diodes Division 1.5SMC24AHE3_A/I
- Part No.:
- 1.5SMC24AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AHE3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,223
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Product details
Overview
1.5SMC24AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), 33.2 V clamping voltage at 45.2 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC24AHE3_A/I datasheet, 1.5SMC24AHE3_A/I pinout, 1.5SMC24AHE3_A/I application, or 1.5SMC24AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance, and unidirectional polarity marking for correct PCB orientation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 20.5 V), then rapidly avalanches below 25.2 V to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for repetitive 0.01% duty cycle surges, it delivers 1500 W peak pulse power while maintaining TJ ≤ 150 °C when mounted on 8.0 mm × 8.0 mm copper pads. The SMC package supports automated placement and meets MSL level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20.5 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin for 24 V nominal systems. |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Voltage range where avalanche conduction initiates; tight tolerance enables predictable clamping onset. |
| VC (Clamping) | 33.2 V at 45.2 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for ensuring downstream ICs remain within absolute max ratings. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 μs waveform; determines survivability against lightning-induced or inductive-switching transients. |
| TJ max | 150 °C - Maximum junction temperature; requires thermal design using RθJA = 75 °C/W and recommended 8.0 mm × 8.0 mm copper pads. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control modules and ADAS sensor units per stress test requirements. |
| Package | SMC (DO-214AB) - Surface-mount package with cathode band marking; footprint compatible with IPC-7351B SMC_STD. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes shunt path during overvoltage events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V supply rail or CAN_H); band-marked end for orientation verification. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients such as ISO 7637-2 Pulse 1/2a/5a in automotive 24 V systems without derating. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime - critical for safety-critical sensor interfaces. |
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, HTRB, and ESD testing - supports PPAP documentation for Tier 1 suppliers. |
| MSL Level 1 rating | Allows standard SMT reflow without moisture sensitivity concerns; eliminates bake requirement prior to assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for high-speed logic and ADC inputs. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIOs and LIN transceivers from load dump and alternator ripple in 24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between 24 V supply rail and ground, triggered only during overvoltage events. Use Value: Clamps transients to ≤33.2 V, preventing latch-up or permanent damage to 3.3 V/5 V logic powered from local LDOs. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end protection device located at terminal block entry point before optocoupler isolation stage. Use Value: Absorbs up to 1500 W of surge energy without degradation, eliminating need for secondary MOV-based protection stages. |
| Telecom Power Supply Front-End | Medical Infusion Pump Motor Driver |
Use Scenario: Guards AC/DC converter output rails against cross-talk and lightning-induced surges in outdoor telecom enclosures. IC Role / Device Role / Timing Role: Unidirectional TVS connected across +24 V output and chassis ground to clamp common-mode transients. Use Value: Maintains <1 μA leakage at 20.5 V, avoiding unnecessary standby current draw in always-on power systems. |
Use Scenario: Safeguards H-bridge gate drivers from back-EMF spikes generated by brushed DC motors in portable medical devices. IC Role / Device Role / Timing Role: Localized suppression at motor driver IC power pins, placed adjacent to MOSFET source terminals. Use Value: Responds in <1 ns to fast-rising inductive kick, limiting voltage overshoot to safe levels for 40 V-rated gate drivers. |
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 | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 90 °C/W) | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics but not automotive Tier 1 designs | Select when board space is constrained and surge energy is limited to ≤600 W; verify thermal margin with smaller pad area. |
| 1.5KE24A | Same 1500 W rating but axial DO-201AD package; higher mounting inductance and manual assembly requirement | Lacks MSL level 1 rating and automated placement compatibility; used in legacy industrial equipment upgrades | Choose only for through-hole retrofits or where SMT infrastructure is unavailable; avoid in new automotive or high-volume production. |
Compared with SMBJ24A and 1.5KE24A, the 1.5SMC24AHE3_A/I uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, and full 1500 W capability - making it the preferred choice for new automotive and industrial designs requiring both reliability and manufacturability.
Availability
1.5SMC24AHE3_A/I is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, and telecom power supply front-ends requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for 1.5SMC24AHE3_A/I 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, precision, and automotive-grade validation.
The 1.5SMC Series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24AHE3_A/I under a 10/1000 μs surge?
The 1.5SMC24AHE3_A/I has a maximum clamping voltage (VC) of 33.2 V at 45.2 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events. The 1.5SMC24AHE3_A/I maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC24AHE3_A/I AEC-Q101 qualified?
Yes, the 1.5SMC24AHE3_A/I is AEC-Q101 qualified. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, validated per the full stress test suite including temperature cycling, high-temperature reverse bias (HTRB), and ESD. This qualification makes the 1.5SMC24AHE3_A/I suitable for automotive applications such as body control modules, ADAS sensors, and infotainment power rails.
What does the "_A/I" suffix mean in 1.5SMC24AHE3_A/I?
The "_A/I" suffix in 1.5SMC24AHE3_A/I indicates packaging configuration: "A" specifies the voltage variant (24 V unidirectional), and "I" denotes 13-inch diameter plastic tape and reel packaging containing 3500 units. This format complies with EIA-481-D standards and supports high-speed pick-and-place assembly. The base part 1.5SMC24AHE3 is identical electrically and thermally across all delivery formats.
How does the 1.5SMC24AHE3_A/I differ from bidirectional variants like 1.5SMC24CA?
The 1.5SMC24AHE3_A/I is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse voltage is blocked. In contrast, 1.5SMC24CA is bidirectional - symmetrical in both directions, no polarity marking, and used for AC signal lines or differential buses like RS-485. Their VWM, VBR, and VC values differ accordingly; the 1.5SMC24AHE3_A/I is not interchangeable with 1.5SMC24CA without circuit redesign.
What is the thermal resistance of the 1.5SMC24AHE3_A/I, and how does it affect layout?
The 1.5SMC24AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, PCB layout must allocate adequate copper area and consider airflow. Reducing pad size increases RθJA significantly - e.g., to ~120 °C/W on standard 1.0 mm² pads - risking thermal runaway during repetitive surges.
1.5SMC24AHE3_A/I 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:
- 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):
- 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_A/I FAQ
1.How can I place an order for 1.5SMC24AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AHE3_A/I 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_A/I reliable?
The price and inventory of 1.5SMC24AHE3_A/I 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_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AHE3_A/I?
1.5SMC24AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AHE3_A/I 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_A/I?
For technical support, including 1.5SMC24AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC24AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AHE3_A/I?
All 1.5SMC24AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC24AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24AHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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