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Vishay General Semiconductor - Diodes Division SM8S15A-002HE3_A/I
- Part No.:
- SM8S15A-002HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S15A-002HE3_A/I.pdf
- Description:
- TVS DIODE 15VWM DO218AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM8S15A-002HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 15 V stand-off voltage (VWM), 17.6 V nominal breakdown (VBR), and 6600 W peak pulse power (10/1000 μs). It delivers AEC-Q101 qualification, 175 °C junction temperature capability, and low leakage (<10 μA at VWM), designed specifically for automotive load dump protection in 12 V systems.
For engineers reviewing the SM8S15A-002HE3_A/I datasheet, SM8S15A-002HE3_A/I pinout, SM8S15A-002HE3_A/I application, or SM8S15A-002HE3_A/I equivalent, key selection criteria include clamping voltage (24.4 V at IPPM), thermal resistance (RθJM = 0.35 °C/W), unidirectional polarity with heatsink-as-anode configuration, and compliance with ISO7637-2 surge testing under defined conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its junction design supports operation up to TJ = 175 °C and meets MSL Level 1 per J-STD-020 with 245 °C reflow peak.
The device exhibits a positive temperature coefficient of VBR (αT = 0.080 %/°C) and achieves 270 A peak pulse current (10/1000 μs) at 24.4 V clamping. Polarity is fixed unidirectional, with the metal heatsink serving as the anode terminal - critical for correct PCB layout and thermal mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - maximum continuous reverse operating voltage before conduction begins; defines system operating margin in 12 V automotive circuits. |
| VBR (nom) | 17.6 V - breakdown voltage at 5 mA test current; ensures reliable triggering above normal transients but below IC damage thresholds. |
| VC @ IPPM | 24.4 V - clamping voltage at 270 A peak pulse (10/1000 μs); limits downstream voltage stress during load dump events. |
| PPPM (10/1000 μs) | 6600 W - peak pulse power handling; enables robust suppression of high-energy ISO7637-2 Pulse 5a load dump surges. |
| TJ max | +175 °C - maximum junction temperature; supports under-hood placement and long-term reliability in automotive environments. |
| RθJM | 0.35 °C/W - junction-to-mount thermal resistance; confirms efficient heat transfer to heatsink or copper plane when mounted correctly. |
| Leakage @ VWM | <10 μA at 25 °C - ultra-low reverse leakage preserves battery life and avoids false triggering in always-on modules. |
Pinout & Package
Package: DO-218AB - thermally enhanced surface-mount case with integral metal heatsink; matte tin-plated leads; RoHS-compliant and AEC-Q101 qualified; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | Positive surge return path | Must be soldered to large copper area or external heatsink; serves as primary thermal and electrical connection point. |
| Cathode (Lead 1) | Transient voltage sensing and clamping node | Connected to protected line (e.g., battery rail); clamps to 24.4 V when surge exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for ECU, body control, and ADAS modules. |
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift over time and temperature, ensuring stable VBR across 15+ year service life. |
| Heatsink-as-anode architecture | Enables direct thermal coupling to PCB copper or chassis; RθJM = 0.35 °C/W allows >8 W steady-state dissipation with proper mounting. |
| ISO7637-2 compliance | Validated against Pulse 5a (load dump) under specified test conditions - eliminates need for additional external filtering in 12 V vehicle networks. |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns; peak temperature tolerance up to 245 °C per J-STD-020. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Suppresses 12 V battery rail voltage spikes up to 60 V caused by alternator load dump during ignition-off events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transient to 24.4 V within nanoseconds, protecting downstream PMICs and microcontrollers rated for ≤36 V absolute maximum. |
Use Scenario: Shields ECU main power supply from switching noise and relay-induced transients in engine bay wiring harnesses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of LDOs and buck regulators. Use Value: Withstands 270 A peak pulses and maintains <10 μA leakage at 15 V, enabling low-quiescent-current design for always-on wake-up circuitry. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Interface |
|
Use Scenario: Protects BCM power inputs from inductive kickback generated by door lock actuators, window motors, and HVAC relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on fused 12 V feed, positioned before reverse-polarity protection and input filter. Use Value: 175 °C TJ rating ensures uninterrupted operation during prolonged under-hood thermal soak; RθJM = 0.35 °C/W enables compact layout without forced air. |
Use Scenario: Safeguards 12 V input to automotive camera modules exposed to harsh vibration and thermal cycling near front grille. IC Role / Device Role / Timing Role: First-line transient suppressor on camera module PCB, mounted directly to internal heatsink pad. Use Value: DO-218AB package provides mechanical robustness and repeatable thermal performance; AEC-Q101 qualification guarantees field failure rate <10 FIT. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S15AHM3_A/I | Same VWM/VBR/PPPM specs; HM3 suffix indicates updated qualification revision and enhanced whisker resistance (JESD 201 Class 2). | No change in circuit function or layout; identical DO-218AB footprint and anode-heatsink pinout. | Preferred for new designs due to improved process control and extended lifecycle support; replaces SM8S15A-002HE3_A/I per Vishay's "Not For New Designs" notice. |
| SMAJ15A | Lower PPPM (400 W vs. 6600 W); smaller SMA package (RθJA = 110 °C/W vs. 0.35 °C/W); no AEC-Q101 qualification. | Limited to low-energy transients; unsuitable for load dump; requires derating above 70 °C ambient. | Only acceptable for non-automotive, low-power industrial sensors where surge energy is <10% of ISO7637-2 Pulse 5a. |
Compared with SM8S15A-002HE3_A/I, SM8S15AHM3_A/I offers identical electrical performance with enhanced reliability validation, while SMAJ15A sacrifices 94% peak power handling and automotive qualification - making it incompatible for load dump-critical applications.
Availability
SM8S15A-002HE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and body control modules requiring stable component supply amid ongoing industry transition to HM3 variants.
Supply support for SM8S15A-002HE3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM8S series is engineered for high-energy transient suppression in automotive power systems, with focus on load dump resilience, under-hood thermal endurance, and AEC-Q101 compliance from wafer to final test.
FAQ
What is the clamping voltage of SM8S15A-002HE3_A/I at its rated peak pulse current?
The SM8S15A-002HE3_A/I has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current of 270 A under the 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C) and defines the upper voltage limit imposed on protected circuitry during surge events. The SM8S15A-002HE3_A/I maintains this clamping performance across its full operating temperature range, supporting robust design margins in automotive applications.
Is SM8S15A-002HE3_A/I suitable for new automotive designs?
No - Vishay explicitly marks SM8S15A-002HE3_A/I as "Not For New Designs", recommending SM8S15AHM3_A/I as the alternative. The SM8S15A-002HE3_A/I remains available for legacy production and repair, but lacks the updated process controls, enhanced whisker resistance (JESD 201 Class 2), and extended lifecycle support of the HM3 variant. For any new schematic or BOM release, SM8S15A-002HE3_A/I should not be selected.
How is polarity configured on SM8S15A-002HE3_A/I, and why does it matter?
The SM8S15A-002HE3_A/I is unidirectional with the metal heatsink serving as the anode terminal and Lead 1 as the cathode. This configuration is critical: incorrect orientation prevents clamping action and may cause catastrophic failure during surge events. PCB layout must allocate the heatsink pad to the positive rail (e.g., battery+) and route the cathode to the protected line. The SM8S15A-002HE3_A/I datasheet specifies "Polarity: heatsink is anode" - a non-negotiable mounting requirement.
What thermal performance can be expected from SM8S15A-002HE3_A/I in a typical automotive PCB layout?
When mounted per JEDEC 51-14 on a 2 oz. copper heatsink pad, the SM8S15A-002HE3_A/I achieves RθJM = 0.35 °C/W - meaning a 10 W transient dissipates only 3.5 °C above mount temperature. In practice, this allows sustained 8 W power dissipation (PD) at TA = 25 °C and supports operation up to TJ = 175 °C. The SM8S15A-002HE3_A/I requires no additional thermal vias or external heatsinks for most load dump scenarios, provided the metal heatsink is fully soldered to ≥1 cm² of inner-layer copper.
Does SM8S15A-002HE3_A/I meet ISO7637-2, and under what conditions?
Yes - the SM8S15A-002HE3_A/I meets ISO7637-2 surge specification, specifically Pulse 5a (load dump), but only under defined test conditions documented in Vishay's application notes and characterization reports. Compliance is verified using the 10 ms exponential waveform at TJ = 25 °C and proper mounting per JEDEC 51-14. The SM8S15A-002HE3_A/I does not guarantee compliance across all vehicle architectures without system-level validation, as cable impedance and grounding affect actual surge profile.
SM8S15A-002HE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 270A
- 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
SM8S15A-002HE3_A/I FAQ
1.How can I place an order for SM8S15A-002HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S15A-002HE3_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 SM8S15A-002HE3_A/I reliable?
The price and inventory of SM8S15A-002HE3_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 SM8S15A-002HE3_A/I is usually 5 days.
3.What payment methods are accepted for SM8S15A-002HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S15A-002HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S15A-002HE3_A/I?
SM8S15A-002HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S15A-002HE3_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 SM8S15A-002HE3_A/I?
For technical support, including SM8S15A-002HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S15A-002HE3_A/I requirements.
6.How does Aetrix verify that SM8S15A-002HE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM8S15A-002HE3_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 SM8S15A-002HE3_A/I meets industry standards.
7.What is the process for return or replacement of SM8S15A-002HE3_A/I?
All SM8S15A-002HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S15A-002HE3_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 SM8S15A-002HE3_A/I part is unused and in its original packaging.
Return procedure for SM8S15A-002HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S15A-002HE3_A/I Tags
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ESD9B5.0ST5G
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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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