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Vishay General Semiconductor - Diodes Division SM5S24A-E3/2D
- Part No.:
- SM5S24A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S24A-E3/2D.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,317
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Product details
Overview
SM5S24A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for automotive load dump protection in 24 V systems. It features a 24.0 V stand-off voltage (VWM), 38.9 V clamping voltage (VC) at 93 A peak pulse current, and 3600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C.
For engineers reviewing the SM5S24A-E3/2D datasheet, SM5S24A-E3/2D pinout, SM5S24A-E3/2D application, or SM5S24A-E3/2D equivalent, this device is selected for high-reliability 24 V automotive power rail protection where low leakage (<10 μA at VWM), AEC-Q101 qualification, and DO-218AB package thermal robustness are critical.
Technical Context
The SM5S24A-E3/2D uses passivated anisotropic rectifier technology optimized for junction stability under high-temperature transients. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to PCB copper planes for efficient thermal dissipation.
It meets ISO 7637-2 load dump surge requirements with 10 ms exponential waveform capability and complies with MSL Level 1 (245 °C reflow peak). The device delivers 5 W steady-state power dissipation on infinite heatsink and exhibits RθJC = 1.0 °C/W for predictable thermal design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 38.9 V at 93 A - Clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM (10/1000 μs) | 3600 W - Peak transient energy handling capacity for automotive load dump events |
| ID @ VWM | <10 μA at 25 °C - Minimal leakage preserves battery life in always-on vehicle modules |
| TJ max. | 175 °C - Enables operation in engine bay environments without derating |
| RθJC | 1.0 °C/W - Predictable junction-to-case thermal resistance supports thermal modeling |
| AEC-Q101 | Qualified - Validated for automotive reliability per stress test requirements |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink terminal (anode) and molded body meeting UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected line (e.g., 24 V rail); carries surge current into device |
| Lead 2 / Metal Heatsink | Anode | Must be soldered to large copper pour for thermal management and electrical return path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable breakdown and low parametric drift over lifetime |
| High-temperature operation | Rated for continuous use at TJ = 175 °C, eliminating need for external thermal derating in hot zones |
| Low forward voltage drop | VF ≤ 2.0 V at 100 A enables minimal conduction loss during surge events |
| ISO 7637-2 compliance | Validated for load dump waveforms, reducing need for additional system-level validation effort |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 245 °C peak, no moisture sensitivity handling required |
Applications
| Automotive Load Dump Protection | Industrial 24 V Power Supply Protection |
|---|---|
Use Scenario: Protecting ECUs, body control modules, and infotainment systems from 12 V/24 V vehicle battery load dump surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V rail and chassis ground to clamp transients within safe limits. Use Value: Clamps to 38.9 V at 93 A, preventing damage to downstream 40 V-rated regulators and microcontrollers. | Use Scenario: Safeguarding programmable logic controllers (PLCs) and industrial HMIs powered from 24 V DC supplies subject to inductive switching noise. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on input power stage, absorbing repetitive 3600 W surges. Use Value: 175 °C junction rating allows uninterrupted operation in enclosed cabinets without forced cooling. |
| Commercial Vehicle Telematics | Off-Highway Equipment Control Units |
Use Scenario: Securing GPS/GNSS receivers and cellular modems in fleet management gateways exposed to harsh vehicle electrical environments. IC Role / Device Role / Timing Role: Standoff-clamp TVS on modem power input, maintaining signal integrity during ignition transients. Use Value: <10 μA leakage at 24 V minimizes quiescent current draw in battery-backed tracking modes. | Use Scenario: Protecting hydraulic valve controllers and sensor interfaces in construction and agricultural machinery with long cable harnesses. IC Role / Device Role / Timing Role: High-energy transient suppressor mounted directly at connector entry point on main controller board. Use Value: DO-218AB metal heatsink enables direct thermal coupling to chassis, sustaining repeated 2800 W (10/10000 μs) surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), SMA package, RθJC ≈ 50 °C/W | Not suitable for sustained load dump; limited to lower-energy transients | Select when cost or board space is prioritized over automotive-grade surge capacity |
| TPSMD24 | Same DO-218AB package, 38.9 V VC, but 3300 W PPPM and non-AEC-Q101 | Lacks automotive qualification; requires additional system-level reliability validation | Choose for industrial applications where AEC-Q101 is not mandated |
Compared with SMAJ24A and TPSMD24, the SM5S24A-E3/2D uniquely combines AEC-Q101 qualification, 3600 W surge rating, and 1.0 °C/W thermal resistance in DO-218AB-enabling single-device compliance with ISO 7637-2 load dump without external heatsinking or parallel devices.
Availability
SM5S24A-E3/2D is available at Aetrix Electronics and suitable for automotive electronics, industrial 24 V power systems, and off-highway equipment requiring stable component supply and long-term lifecycle support.
Supply support for SM5S24A-E3/2D 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SM5SxxA series is part of Vishay's PAR® TVS platform, engineered specifically for automotive load dump and ISO 7637-2 compliance in 12 V/24 V systems with extended temperature operation.
FAQ
What is the clamping voltage of the SM5S24A-E3/2D at its rated peak pulse current?
The SM5S24A-E3/2D has a maximum clamping voltage (VC) of 38.9 V at 93 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured and guaranteed per the Vishay datasheet (Document Number: 88382), ensuring predictable overvoltage protection for downstream 40 V-rated components in 24 V systems. The SM5S24A-E3/2D maintains this performance across its full operating temperature range.
Is the SM5S24A-E3/2D qualified for automotive applications?
Yes, the SM5S24A-E3/2D is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet. It is designed for automotive environments including engine control units, body electronics, and telematics systems. The SM5S24A-E3/2D also meets ISO 7637-2 load dump requirements and operates reliably from –55 °C to +175 °C junction temperature, fulfilling key automotive reliability criteria.
What package does the SM5S24A-E3/2D use, and how is it mounted?
The SM5S24A-E3/2D uses the DO-218AB surface-mount package, featuring a metal heatsink terminal (anode) and molded UL 94 V-0 body. Mounting requires soldering the metal heatsink (Lead 2) to a large PCB copper area for thermal conduction, while Lead 1 (cathode) connects to the protected line. This configuration achieves RθJC = 1.0 °C/W and supports 3600 W surge dissipation. The SM5S24A-E3/2D is delivered in 13" tape-and-reel (750 pcs/reel, code 2D).
How does the SM5S24A-E3/2D compare to the SM5S24 (non-A) variant?
The SM5S24A-E3/2D has tighter breakdown voltage tolerance (26.7–29.5 V) versus SM5S24 (26.7–32.6 V), resulting in more consistent clamping behavior. Its lower VC (38.9 V vs. 43.0 V) and higher IPPM (93 A vs. 84 A) reflect improved surge handling. Both share DO-218AB packaging and AEC-Q101 qualification, but the SM5S24A-E3/2D is preferred for designs demanding tighter parametric control and higher transient margin.
Does the SM5S24A-E3/2D require special handling during PCB assembly?
No special handling is required: the SM5S24A-E3/2D is rated MSL Level 1 per J-STD-020 and compatible with standard lead-free reflow profiles peaking at 245 °C. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the HE3 suffix confirms JESD 201 Class 2 whisker resistance. The SM5S24A-E3/2D can be processed in standard SMT lines without baking or dry-pack requirements.
SM5S24A-E3/2D 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):
- 93A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM5S24A-E3/2D FAQ
1.How can I place an order for SM5S24A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S24A-E3/2D 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 SM5S24A-E3/2D reliable?
The price and inventory of SM5S24A-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S24A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM5S24A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S24A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S24A-E3/2D?
SM5S24A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S24A-E3/2D 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 SM5S24A-E3/2D?
For technical support, including SM5S24A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S24A-E3/2D requirements.
6.How does Aetrix verify that SM5S24A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S24A-E3/2D 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 SM5S24A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM5S24A-E3/2D?
All SM5S24A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S24A-E3/2D, 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 SM5S24A-E3/2D part is unused and in its original packaging.
Return procedure for SM5S24A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S24A-E3/2D Tags
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