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Vishay General Semiconductor - Diodes Division SM8S24A-7001HE4/2N
- Part No.:
- SM8S24A-7001HE4/2N
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S24A-7001HE4/2N.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,394
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Product details
Overview
SM8S24A-7001HE4/2N 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-7001HE4/2N datasheet, SM8S24A-7001HE4/2N pinout, SM8S24A-7001HE4/2N application, or SM8S24A-7001HE4/2N equivalent, this page delivers verified electrical parameters, thermal derating behavior, ISO7637-2 compliance context, and direct alternatives for automotive power rail protection design.
Technical Context
This TVS diode operates as a unidirectional clamping device with anode-connected heatsink configuration, enabling robust surge conduction during positive transients on 24 V supply lines. Its passivated anisotropic rectifier technology ensures low leakage (<10 µA at VWM) and low forward voltage drop (≤1.8 V at 100 A), critical for minimizing standby loss in always-on vehicle modules.
The device delivers 6600 W peak pulse power under 10/1000 µs waveform and sustains 5200 W under longer 10/10 000 µs load dump events. Its RθJC of 0.90 °C/W and MSL Level 1 rating support reliable thermal management on PCBs with copper heatsinking pads per DO-218AB footprint.
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 clamping during normal operation. |
| VWM | 24.0 V - Maximum continuous reverse voltage before leakage exceeds 10 µA; matches standard 24 V automotive system operating range. |
| VC @ IPPM | 38.9 V at 170 A - Clamps load dump transients below 40 V, protecting downstream 40 V-rated ICs and MOSFETs. |
| PPPM (10/1000 µs) | 6600 W - Handles severe ISO7637-2 Pulse 5a load dump surges without failure when mounted on adequate copper area. |
| TJ max | +175 °C - Enables use in engine bay and power distribution modules where ambient temperatures exceed 125 °C. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
Pinout & Package
Package: DO-218AB - Surface-mount case with integral metal heatsink tab (anode terminal), optimized for high-power dissipation and automated assembly. Meets UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries full surge current during clamping event. |
| Lead 2 / Metal Heatsink Tab | Anode | Primary thermal path to PCB copper; must be soldered to ≥100 mm² copper pour for rated power handling. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Reduces long-term leakage drift and improves humidity resistance in under-hood environments. |
| 175 °C junction capability | Enables placement near high-temperature components (e.g., DC/DC converters, motor drivers) without thermal derating penalties. |
| Low VF (≤1.8 V @ 100 A) | Minimizes conduction loss during sustained overvoltage events, reducing localized heating in the TVS and adjacent traces. |
| ISO7637-2 compliance | Validated for Pulse 5a (load dump) under specified test conditions, supporting OEM-level EMC validation. |
| MSL Level 1 | Allows unlimited floor life and reflow at 245 °C peak, eliminating bake requirements prior to assembly. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Supply Rail |
|---|---|
Use Scenario: Protects 24 V input stage against alternator load dump transients during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed upstream of DC/DC converter input filter. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 40 V-rated input capacitors and controller ICs. |
Use Scenario: Shields BCM microcontroller and CAN transceivers from coupled surges on shared vehicle battery rail. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24 V supply line before local LDO regulators. Use Value: Absorbs 6600 W pulses without degradation, maintaining system uptime during repeated ignition cycles. |
| Electric Power Steering (EPS) Motor Driver | Advanced Driver Assistance Systems (ADAS) Camera Module |
Use Scenario: Safeguards high-current H-bridge gate drivers from inductive kickback and load dump coupling. IC Role / Device Role / Timing Role: High-energy TVS mounted directly at motor driver power entry point. Use Value: Withstands 700 A non-repetitive surge (IFSM) and maintains clamping performance after thermal cycling to 175 °C. |
Use Scenario: Provides secondary protection for 24 V–to–5 V/3.3 V power conversion in vision-based ADAS sensors. IC Role / Device Role / Timing Role: Final-stage TVS on camera module input, complementing upstream LC filtering. Use Value: Low leakage (<10 µA) prevents quiescent current increase in always-on parking assist systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W), SMA package, 38.9 V VC, but only 200 A IPPM. | Suitable for lower-energy transients; not rated for ISO7637-2 Pulse 5a or AEC-Q101. | Select when cost and board space constrain design, and surge energy remains below 100 mJ. |
| TPSMD24A | Same DO-218AB package, 26.7–29.5 V VBR, but 4000 W PPPM (10/1000 µs) and 125 A IPPM. | Lacks AEC-Q101 qualification and ISO7637-2 validation; intended for industrial, not automotive. | Choose for non-automotive 24 V systems requiring DO-218AB form factor but no automotive qualification. |
Compared with SMAJ24A-E3/57T and TPSMD24A, SM8S24A-7001HE4/2N delivers 6600 W surge capacity and AEC-Q101 certification-enabling single-device compliance with OEM load dump requirements without parallel devices or external qualification effort.
Availability
SM8S24A-7001HE4/2N is available at Aetrix Electronics and suitable for automotive ECU power protection, body control module (BCM) supply conditioning, and electric power steering (EPS) driver circuits requiring stable component supply across extended production lifecycles.
Supply support for SM8S24A-7001HE4/2N 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing facilities focused on automotive and industrial reliability.
The SM8S series was developed specifically for high-energy automotive load dump protection, emphasizing AEC-Q101 qualification, 175 °C operation, and DO-218AB thermal performance in under-hood environments.
FAQ
What is the clamping voltage of SM8S24A-7001HE4/2N at its rated peak pulse current?
The SM8S24A-7001HE4/2N has a maximum clamping voltage (VC) of 38.9 V at 170 A peak pulse current (IPPM) under 10/1000 µs waveform. This value is measured per the manufacturer's test conditions and ensures downstream 40 V-rated components remain within safe operating limits during load dump events. The SM8S24A-7001HE4/2N maintains this clamping performance across its full operating temperature range.
Is SM8S24A-7001HE4/2N qualified for automotive applications?
Yes, SM8S24A-7001HE4/2N is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 surge requirements for load dump (Pulse 5a) under defined test conditions and supports junction temperatures up to +175 °C-making it suitable for engine control units, body control modules, and other under-hood applications. The SM8S24A-7001HE4/2N carries the HE4 suffix indicating RoHS compliance and AEC-Q101 qualification.
What package does SM8S24A-7001HE4/2N use, and how should it be mounted?
SM8S24A-7001HE4/2N uses the DO-218AB surface-mount package with an integral metal heatsink tab serving as the anode terminal. For rated power handling, the metal tab must be soldered to a minimum 100 mm² copper area on the PCB to achieve the specified 0.90 °C/W thermal resistance (RθJC). Lead 1 is the cathode and connects to the protected line. The SM8S24A-7001HE4/2N requires no additional thermal interface material.
Does SM8S24A-7001HE4/2N meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SM8S24A-7001HE4/2N is rated MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 245 °C. This allows indefinite floor life and eliminates the need for baking prior to assembly. The device's matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the HE4 suffix confirms whisker resistance per JESD 201 Class 2. The SM8S24A-7001HE4/2N supports standard SMT processes without special handling.
How does SM8S24A-7001HE4/2N differ from the non-A version (e.g., SM8S24)?
The SM8S24A-7001HE4/2N has tighter breakdown voltage tolerance (26.7–29.5 V) versus SM8S24 (26.7–32.6 V), resulting in more consistent clamping onset and reduced risk of premature conduction. It also exhibits higher peak pulse current (170 A vs. 153 A) and lower clamping voltage (38.9 V vs. 43.0 V) under identical test conditions. Both share DO-218AB packaging and AEC-Q101 qualification, but the SM8S24A-7001HE4/2N delivers superior surge margin for critical 24 V automotive rails.
SM8S24A-7001HE4/2N 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-7001HE4/2N FAQ
1.How can I place an order for SM8S24A-7001HE4/2N through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S24A-7001HE4/2N 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-7001HE4/2N reliable?
The price and inventory of SM8S24A-7001HE4/2N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S24A-7001HE4/2N is usually 5 days.
3.What payment methods are accepted for SM8S24A-7001HE4/2N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S24A-7001HE4/2N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S24A-7001HE4/2N?
SM8S24A-7001HE4/2N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S24A-7001HE4/2N 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-7001HE4/2N?
For technical support, including SM8S24A-7001HE4/2N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S24A-7001HE4/2N requirements.
6.How does Aetrix verify that SM8S24A-7001HE4/2N is sourced from the original manufacturer or authorized distributors?
All SM8S24A-7001HE4/2N 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-7001HE4/2N meets industry standards.
7.What is the process for return or replacement of SM8S24A-7001HE4/2N?
All SM8S24A-7001HE4/2N units undergo pre-shipment inspection (PSI). If there is an issue with SM8S24A-7001HE4/2N, 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-7001HE4/2N part is unused and in its original packaging.
Return procedure for SM8S24A-7001HE4/2N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S24A-7001HE4/2N Tags
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