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Vishay General Semiconductor - Diodes Division SM8S24A-001HE3/2D
- Part No.:
- SM8S24A-001HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S24A-001HE3/2D.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,510
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Product details
Overview
SM8S24A-001HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 24 V systems. It features a 26.7 V minimum breakdown voltage (VBR), 24.0 V maximum stand-off voltage (VWM), 38.9 V clamping voltage (VC) at 170 A peak pulse current, and 6600 W peak pulse power (10/1000 μs). Its DO-218AB package supports junction temperatures up to 175 °C and meets AEC-Q101 qualification.
For engineers reviewing the SM8S24A-001HE3/2D datasheet, SM8S24A-001HE3/2D pinout, SM8S24A-001HE3/2D application, or SM8S24A-001HE3/2D equivalent, this page delivers verified electrical parameters, thermal derating behavior, ISO7637-2 surge compliance context, and direct replacement guidance for 24 V automotive power rail protection.
Technical Context
The SM8S24A-001HE3/2D operates as a unidirectional avalanche diode with anode-connected heatsink configuration, optimized for fast clamping of load dump transients in 24 V battery systems. Its junction passivation and anisotropic rectifier technology enable stable operation at TJ = 175 °C and low leakage (<10 μA at VWM).
It delivers 6600 W peak pulse power under 10/1000 μs waveform and 5200 W under 10/10 000 μs waveform, with thermal resistance RθJC = 0.90 °C/W enabling effective heat transfer to PCB copper or external heatsink. The device meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 26.7 V / 29.5 V - ensures reliable triggering above 24 V nominal rail while avoiding false trips during normal transients |
| VWM | 24.0 V - maximum continuous reverse voltage before significant leakage begins; matches 24 V system operating range |
| VC @ IPPM | 38.9 V - clamped voltage seen by protected ICs during 170 A 10/1000 μs surge; limits downstream stress |
| PPPM (10/1000 μs) | 6600 W - enables robust suppression of ISO7637-2 Pulse 5a load dump events without failure |
| TJ max | 175 °C - supports under-hood placement in automotive ECUs with no derating required up to ambient 125 °C |
| RθJC | 0.90 °C/W - allows efficient thermal coupling to PCB copper pour or heatsink, critical for sustained surge handling |
Pinout & Package
Package: DO-218AB - thermally enhanced surface-mount case with integral metal heatsink (lead 2), matte tin-plated terminals, UL 94 V-0 molding compound, and anode-connected heatsink polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries full surge current during clamping |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical return; must be soldered to large copper area for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards |
| 175 °C junction rating | Enables direct mounting in high-temperature engine bay locations without thermal derating penalties |
| Low leakage & forward drop | <10 μA at 24 V and VF ≤ 1.8 V @ 100 A - minimizes standby loss and avoids unintended conduction |
| DO-218AB thermal performance | RθJC = 0.90 °C/W supports >5 kW surge dissipation when mounted on ≥2 oz copper with thermal vias |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Interface |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and analog sensors from 120 V/100 ms load dump surges during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping within 1 ns to limit voltage to 38.9 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and 24 V tolerant analog front-ends in ASIL-B systems. | Use Scenario: Shields power management ICs and LIN transceivers from coupled transients during door lock actuator switching. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V supply line upstream of DC-DC converters and LDOs. Use Value: Maintains regulated output stability by limiting input rail excursion to ≤38.9 V during 50 A/10 ms inductive kick events. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and ISP power rails against battery line transients induced by HVAC compressor cycling. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor located at board edge connector, directly shunting surge energy to chassis ground. Use Value: Eliminates video corruption or reset events caused by sub-100 ns voltage spikes exceeding 40 V. | Use Scenario: Protects gate drivers and current sense amplifiers from load dump and motor regeneration spikes in 24 V EPS systems. IC Role / Device Role / Timing Role: High-energy TVS integrated into motor driver PCB power entry stage, thermally anchored to heatsink. Use Value: Sustains 6600 W surge handling without degradation, ensuring functional safety compliance over 15-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5AT | Lower PPPM (400 W), SMA package, RθJC ≈ 50 °C/W, VC = 38.9 V at 10.3 A | Not suitable for load dump; limited to ESD and low-energy transients in non-automotive consumer systems | Select only for cost-sensitive, non-automotive 24 V applications with <500 W surge requirements |
| TPSMD24A | Same DO-218AB package, PPPM = 6600 W, but VBR min = 25.1 V and VC = 39.4 V at 170 A; not AEC-Q101 qualified | Lacks automotive qualification; requires additional reliability validation for automotive deployment | Acceptable for industrial 24 V systems where AEC-Q101 is not mandated, but not drop-in for automotive OEM designs |
Compared with SMAJ24A-E3/5AT and TPSMD24A, the SM8S24A-001HE3/2D uniquely combines AEC-Q101 qualification, 175 °C operation, and 6600 W surge capability in DO-218AB-making it the only option qualified for direct load dump protection in production automotive ECUs without design revalidation.
Availability
SM8S24A-001HE3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across long-life vehicle programs.
Supply support for SM8S24A-001HE3/2D 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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SM8SxxA family was engineered specifically for ISO7637-2-compliant load dump protection in 24 V automotive systems, prioritizing high-temperature reliability, low clamping voltage, and robust surge endurance over multiple transient events.
FAQ
What is the clamping voltage of the SM8S24A-001HE3/2D at its rated peak pulse current?
The SM8S24A-001HE3/2D has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 170 A under the standard 10/1000 μs waveform. This value is measured at TC = 25 °C and guarantees that downstream components see no more than 38.9 V during worst-case surge events, making it suitable for protecting 36 V tolerant ICs in 24 V automotive systems. The SM8S24A-001HE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM8S24A-001HE3/2D qualified for automotive use?
Yes, the SM8S24A-001HE3/2D is AEC-Q101 qualified and rated for junction temperatures up to 175 °C, meeting key requirements for under-hood automotive applications. It also complies with MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing. These qualifications are explicitly confirmed in the Vishay document 88387, revision 31-Aug-16, and apply directly to the SM8S24A-001HE3/2D part number with HE3 suffix.
What does the "-001" in SM8S24A-001HE3/2D signify?
Within the Vishay SM8SxxA family, the "-001" suffix denotes a specific manufacturing variant tied to packaging and reel orientation: it indicates anode-toward-sprocket-hole configuration on the 13" plastic tape-and-reel (package code 2D). This mechanical detail ensures correct automated placement orientation during SMT assembly and is documented in the Ordering Information section of Vishay's SM8S10–SM8S43A datasheet (document 88387).
How does the DO-218AB package of the SM8S24A-001HE3/2D improve thermal performance compared to SMA or SMB packages?
The DO-218AB package of the SM8S24A-001HE3/2D integrates a large metal heatsink (lead 2/anode) directly bonded to the silicon die, achieving a typical junction-to-case thermal resistance (RθJC) of 0.90 °C/W-over 50× better than SMA packages (~50 °C/W). This enables the SM8S24A-001HE3/2D to safely dissipate 6600 W surges without thermal runaway, whereas SMA-based alternatives like SMAJ24A-E3/5AT are limited to 400 W. The SM8S24A-001HE3/2D requires no additional heatsink hardware when mounted on ≥2 oz copper with thermal vias.
Does the SM8S24A-001HE3/2D meet ISO7637-2 requirements for automotive load dump protection?
Yes, the SM8S24A-001HE3/2D is explicitly stated in Vishay's datasheet (document 88387) to meet ISO7637-2 surge specification under defined test conditions-including Pulse 5a (load dump). Its 6600 W peak pulse power rating, 38.9 V clamping voltage at 170 A, and 175 °C junction rating collectively satisfy the energy absorption and voltage limiting requirements for protecting 24 V automotive electronics against 120 V/100 ms transients. The SM8S24A-001HE3/2D is widely deployed in production ECUs for this purpose.
SM8S24A-001HE3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- 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):
- 170A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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-218AB
SM8S24A-001HE3/2D FAQ
1.How can I place an order for SM8S24A-001HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S24A-001HE3/2D 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 SM8S24A-001HE3/2D reliable?
The price and inventory of SM8S24A-001HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S24A-001HE3/2D is usually 5 days.
3.What payment methods are accepted for SM8S24A-001HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S24A-001HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S24A-001HE3/2D?
SM8S24A-001HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S24A-001HE3/2D 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 SM8S24A-001HE3/2D?
For technical support, including SM8S24A-001HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S24A-001HE3/2D requirements.
6.How does Aetrix verify that SM8S24A-001HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S24A-001HE3/2D 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 SM8S24A-001HE3/2D meets industry standards.
7.What is the process for return or replacement of SM8S24A-001HE3/2D?
All SM8S24A-001HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S24A-001HE3/2D, 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 SM8S24A-001HE3/2D part is unused and in its original packaging.
Return procedure for SM8S24A-001HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S24A-001HE3/2D Tags
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