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Vishay General Semiconductor - Diodes Division SM5S24ATHE3/I
- Part No.:
- SM5S24ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S24ATHE3/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,572
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Product details
Overview
SM5S24ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 24 V stand-off voltage (VWM), 28.1 V nominal breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), 93 V clamping voltage at 150 A, and operates up to TJ = 175 °C in the DO-218AC package.
For engineers reviewing the SM5S24ATHE3/I datasheet, SM5S24ATHE3/I pinout, SM5S24ATHE3/I application, or SM5S24ATHE3/I equivalent, this device is selected for high-reliability 12 V automotive power rail protection where ISO 7637-2 compliance, low leakage (<10 μA at VWM), and AEC-Q101 qualification are required.
Technical Context
The SM5S24ATHE3/I uses passivated anisotropic rectifier technology with junction passivation optimized for stable operation under thermal stress. Its unidirectional polarity configures the metal heatsink as anode, enabling direct mounting to chassis ground while delivering 500 A IFSM surge capability and 1.0 °C/W junction-to-case thermal resistance.
It meets MSL Level 1 per J-STD-020 (245 °C peak reflow), supports 10/1000 μs and 10/10 000 μs surge waveforms (3600 W / 2800 W), and exhibits +0.087 %/°C temperature coefficient of VBR - enabling predictable clamping behavior across -55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; sets system overvoltage trip threshold on 12 V automotive rails. |
| VBR (nom) | 28.1 V - Breakdown voltage at 5 mA test current; defines onset of avalanche conduction during transients. |
| VC @ IPPM | 93 V - Clamping voltage at 150 A peak pulse current (10/1000 μs); determines maximum voltage seen by protected downstream ICs. |
| PPPM (10/1000 μs) | 3600 W - Peak pulse power handling capacity; enables robust suppression of ISO 7637-2 Load Dump pulses. |
| TJ max | +175 °C - Maximum junction temperature rating; supports under-hood placement without derating in high-ambient environments. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct orientation for reverse-biased protection of positive supply lines. |
| RθJC | 1.0 °C/W - Low thermal resistance from junction to case; allows efficient heat transfer to PCB copper or external heatsink. |
Pinout & Package
Package: DO-218AC - Surface-mount, single-ended, metal heatsink cathode configuration with matte tin-plated leads; RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Anode connection | Connected to protected line (e.g., battery+); must be routed with low-inductance trace for fast response. |
| Lead 2 / Metal Heatsink (Cathode) | Cathode connection | Functions as cathode terminal and primary thermal path; must be soldered to large copper pour or chassis ground. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift <±5% over lifetime and 175 °C operation without parametric shift. |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per AEC standard. |
| Meets ISO 7637-2 surge specification | Rated for 3600 W (10/1000 μs) and 2800 W (10/10 000 μs) pulses - covers all Load Dump Test Pulse 5a/5b conditions. |
| MSL Level 1 (245 °C peak) | Allows single-pass lead-free reflow without popcorn cracking or delamination risk. |
| Low leakage at VWM | <10 μA at 24 V and 25 °C - minimizes standby power loss in always-on vehicle modules. |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Protects BCM microcontroller and CAN transceivers from alternator load dump surges during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery+ and local DC/DC input, clamping transients before LDOs and regulators. Use Value: Limits voltage to ≤93 V during 3600 W surges, preventing latch-up or damage to 3.3 V/5 V logic supplies downstream. |
Use Scenario: Shields ECU main power rail from ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switching) transients. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted directly at connector entry point with minimal trace length. Use Value: Withstands 500 A IFSM and maintains <10 μA leakage at 24 V, ensuring no impact on sleep-mode current budget. |
| ADAS Camera Power Supply | Infotainment Head Unit DC Input |
|
Use Scenario: Safeguards 12 V input of automotive camera modules exposed to harsh under-hood thermal and electrical environments. IC Role / Device Role / Timing Role: Unidirectional TVS with heatsink-cathode mounting to aluminum housing, providing both ESD and load dump immunity. Use Value: 175 °C TJ rating and 1.0 °C/W RθJC enable reliable operation without derating in sealed enclosures near engine compartments. |
Use Scenario: Guards infotainment head unit's main 12 V supply against jump-start spikes and alternator regulation faults. IC Role / Device Role / Timing Role: Secondary-level TVS after fuse and upstream filter, sized for sustained 2800 W (10/10 000 μs) energy absorption. Use Value: Clamps to 93 V within nanoseconds, preserving integrity of USB-C PD controllers and audio amplifiers sensitive to overvoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S24AHM3 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free molding compound and enhanced whisker resistance (JESD 201 Class 2), but not AEC-Q101 qualified. | Approved for industrial or commercial automotive-adjacent systems where AEC-Q101 is not mandated. | Select SM5S24AHM3 only if AEC-Q101 certification is not required and halogen-free compliance is prioritized. |
| SMAJ24AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), 1.5x higher RθJA, and lower IFSM (40 A); same VWM and AEC-Q101 qualification. | Suitable for space-constrained, lower-energy transient environments (e.g., sensor nodes), not full load dump duty. | Choose SMAJ24AHE3/A only when board area is critical and surge energy remains below 400 W - not a drop-in replacement for SM5S24ATHE3/I. |
Compared with SM5S24AHM3 and SMAJ24AHE3/A, the SM5S24ATHE3/I uniquely combines AEC-Q101 qualification, 3600 W surge rating, and DO-218AC thermal performance - making it the only option rated for full automotive load dump protection in production ECUs.
Availability
SM5S24ATHE3/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera power supplies, and infotainment head unit designs requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SM5S24ATHE3/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, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The SM5SxxAT family was engineered specifically for high-energy automotive load dump protection, leveraging DO-218AC's low RθJC and passivated junction technology to meet stringent AEC-Q101 and ISO 7637-2 requirements.
FAQ
What is the clamping voltage of the SM5S24ATHE3/I at its rated peak pulse current?
The SM5S24ATHE3/I has a maximum clamping voltage (VC) of 93 V at 150 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The SM5S24ATHE3/I maintains this clamping performance across its full operating temperature range (-55 °C to +175 °C), ensuring consistent protection in under-hood automotive environments.
Is the SM5S24ATHE3/I qualified for automotive use?
Yes, the SM5S24ATHE3/I is AEC-Q101 qualified, as confirmed by the HE3 suffix and documentation in Vishay's official datasheet (Doc. #87609). This qualification includes stress testing for high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and mechanical shock - validating its suitability for production automotive electronics. The SM5S24ATHE3/I is explicitly intended for automotive load dump protection applications.
What does the "HE3" suffix mean in SM5S24ATHE3/I?
The "HE3" suffix in SM5S24ATHE3/I denotes RoHS-compliant construction, AEC-Q101 qualification, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passing JESD 201 Class 2 whisker testing. It also indicates packaging in 13-inch plastic tape and reel (750 units per reel), with anode oriented toward sprocket holes. This suffix distinguishes it from non-automotive variants like HM3 or standard AT versions.
Can the SM5S24ATHE3/I replace the SM5S24AHM3 in an existing design?
No - the SM5S24ATHE3/I cannot directly replace SM5S24AHM3 without validation, because although both share identical electrical ratings (VWM, VBR, PPPM), the SM5S24ATHE3/I is AEC-Q101 qualified while SM5S24AHM3 is not. If AEC-Q101 compliance is required for the target application, SM5S24AHM3 is not acceptable. Conversely, substituting SM5S24ATHE3/I for SM5S24AHM3 may require requalification due to differing material content and whisker test performance.
What is the thermal resistance from junction to case for the SM5S24ATHE3/I?
The SM5S24ATHE3/I has a typical thermal resistance of RθJC = 1.0 °C/W, measured from junction to case (metal heatsink). This low value enables effective heat dissipation when the cathode heatsink is soldered to a large copper area or chassis ground. Designers must ensure ≥200 mm² of 2 oz copper connected to the heatsink pad to maintain rated power derating per Fig. 1 in the datasheet. This RθJC value is intrinsic to the DO-218AC package and applies specifically to the SM5S24ATHE3/I.
SM5S24ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 93A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AC
SM5S24ATHE3/I FAQ
1.How can I place an order for SM5S24ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S24ATHE3/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 SM5S24ATHE3/I reliable?
The price and inventory of SM5S24ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S24ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S24ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S24ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S24ATHE3/I?
SM5S24ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S24ATHE3/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 SM5S24ATHE3/I?
For technical support, including SM5S24ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S24ATHE3/I requirements.
6.How does Aetrix verify that SM5S24ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S24ATHE3/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 SM5S24ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S24ATHE3/I?
All SM5S24ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S24ATHE3/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 SM5S24ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S24ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S24ATHE3/I Tags
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