My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM5S11ATHE3/I
- Part No.:
- SM5S11ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S11ATHE3/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM5S11ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 12.2 V minimum breakdown voltage (VBR), 11.0 V stand-off voltage (VWM), 198 V maximum clamping voltage at 150 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature - deployed in 12 V automotive power rail protection circuits.
For engineers reviewing the SM5S11ATHE3/I datasheet, SM5S11ATHE3/I pinout, SM5S11ATHE3/I application, or SM5S11ATHE3/I equivalent, this page delivers verified electrical specs, DO-218AC package details, AEC-Q101 qualification status, thermal resistance (RθJC = 1.0 °C/W), and real-world automotive surge compliance per ISO7637-2.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature reliability. Its unidirectional polarity configures the metal heatsink as the anode, enabling direct mounting to chassis ground while clamping positive transients on the cathode side.
Rated for 500 A non-repetitive forward surge (8.3 ms half-sine), it sustains 5 W steady-state power dissipation on infinite heatsink and meets MSL Level 1 per J-STD-020 with 245 °C lead-free reflow peak. The 0.072 %/°C VBR temperature coefficient ensures predictable clamping across -55 °C to +175 °C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 12.2 V - guarantees reliable conduction onset above normal 12 V rail during load dump events |
| VWM | 11.0 V - blocks leakage below system nominal voltage, minimizing standby power loss |
| VC @ IPPM | 198 V - limits downstream IC stress during 150 A 10/1000 µs surge |
| PPPM (10/1000 µs) | 3600 W - handles severe automotive load dump surges without failure |
| RθJC | 1.0 °C/W - enables effective thermal coupling to PCB copper or external heatsink |
| TJ max | +175 °C - supports under-hood placement in modern automotive ECUs |
| AEC-Q101 | Qualified - validated for automotive-grade reliability and lifetime performance |
Pinout & Package
Package: DO-218AC - surface-mount, thermally enhanced case with metal heatsink acting as anode terminal; RoHS-compliant matte tin-plated leads; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | Current entry point during clamping | Must be soldered to large copper pour or chassis ground for thermal and electrical performance |
| Cathode (Lead 1) | Protected line connection | Connected to 12 V supply rail upstream of sensitive electronics; clamps to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<10 µA at VWM) and long-term reliability at 175 °C |
| Unidirectional polarity with heatsink-anode configuration | Permits low-inductance, low-impedance grounding path critical for fast transient suppression |
| ISO7637-2 compliance (load dump) | Validated for 12 V system load dump waveforms, supporting OEM-level ECU qualification |
| MSL Level 1, 245 °C peak reflow | Eliminates moisture sensitivity concerns and supports standard lead-free SMT assembly |
| HE3 suffix whisker-tested (JESD 201 Class 2) | Ensures tin-lead-free terminations resist tin whisker growth in high-reliability environments |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Protecting microcontroller power rails from alternator load dump transients during battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamping positive surges on 12 V input before LDO regulators. Use Value: Limits clamped voltage to 198 V at 150 A, preventing damage to 36 V-rated input capacitors and downstream PMICs. |
Use Scenario: Safeguarding fuel injector driver ICs against inductive kickback and battery reversal-induced spikes. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at main power entry point before DC-DC converters. Use Value: Withstands 500 A 8.3 ms surge and maintains <10 µA leakage at 11 V, preserving sleep-mode current budget. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
|
Use Scenario: Shielding image sensor and SerDes ICs from conducted noise generated by nearby high-current actuators. IC Role / Device Role / Timing Role: Low-capacitance TVS on 12 V bias rail to suppress sub-µs transients without signal distortion. Use Value: 1.0 °C/W RθJC allows direct thermal coupling to aluminum housing, sustaining repeated 3600 W pulses without derating. |
Use Scenario: Protecting H-bridge gate drivers from back-EMF during motor commutation and fault shutdown. IC Role / Device Role / Timing Role: Primary overvoltage clamp on high-side power rail feeding motor phase terminals. Use Value: AEC-Q101 qualification and 175 °C operation ensure functional safety compliance in ASIL-B EPS systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S11AHM3 | Same VBR, VWM, and PPPM; HM3 suffix indicates halogen-free molding compound and enhanced moisture resistance | Preferred for new designs requiring halogen-free compliance and improved MSL robustness beyond HE3 | Select SM5S11AHM3 for new automotive programs where RoHS+halogen-free and extended MSL margin are required |
| SMAJ11A | Lower PPPM (400 W vs. 3600 W); SMA package (smaller, higher RθJA); no AEC-Q101 qualification | Suitable only for low-energy consumer or industrial transients, not automotive load dump | Use SMAJ11A only in non-automotive, low-surge environments where space constraints outweigh power handling needs |
Compared with SM5S11ATHE3/I, SM5S11AHM3 offers identical electrical protection with upgraded environmental compliance, while SMAJ11A provides compact size at the cost of 90% lower surge capacity and no automotive qualification - making SM5S11ATHE3/I irreplaceable for AEC-Q101–mandated load dump protection.
Availability
SM5S11ATHE3/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera systems, and electric power steering designs requiring stable component supply and long-term lifecycle support.
Supply support for SM5S11ATHE3/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 SM5SxxAT family was engineered specifically for high-energy automotive transient suppression, emphasizing thermal robustness, AEC-Q101 qualification, and ISO7637-2 compliance in surface-mount form factor.
FAQ
What is the primary function of the SM5S11ATHE3/I in automotive circuits?
The SM5S11ATHE3/I functions as a unidirectional transient voltage suppressor that clamps high-energy load dump surges on 12 V automotive power rails. It activates above 12.2 V to divert up to 150 A away from sensitive downstream ICs, limiting voltage to 198 V. Its DO-218AC package and AEC-Q101 qualification make SM5S11ATHE3/I suitable for under-hood ECU and BCM applications where reliability and thermal performance are critical.
Is the SM5S11ATHE3/I still recommended for new designs?
No - Vishay explicitly marks SM5S11ATHE3/I as "Not For New Designs" and recommends SM5S11AHM3 as the alternative. The SM5S11ATHE3/I remains available for legacy production and repair, but new designs should use SM5S11AHM3, which retains identical electrical specs while adding halogen-free construction and enhanced moisture resistance per J-STD-020 MSL Level 1.
How does the DO-218AC package of the SM5S11ATHE3/I improve thermal performance compared to SMA or SMB?
The DO-218AC package of the SM5S11ATHE3/I integrates a large metal heatsink as the anode terminal, achieving a typical RθJC of 1.0 °C/W - over 5× better than SMAJ devices (~6.0 °C/W). This allows SM5S11ATHE3/I to dissipate 3600 W surges without excessive junction temperature rise when mounted to adequate copper area, making it uniquely suited for high-power automotive transients where SMA/SMB packages would thermally saturate.
Does the SM5S11ATHE3/I meet ISO7637-2 requirements for automotive load dump?
Yes - the SM5S11ATHE3/I is characterized and validated to meet ISO7637-2 load dump test conditions, including the 12 V system exponential waveform (10 ms time constant). Its 3600 W peak pulse power rating and 198 V clamping voltage at 150 A ensure compliance with Pulse 5a requirements for protected equipment, as confirmed in Vishay's application curves (Fig. 2) and qualification reports.
What is the significance of the HE3 suffix in SM5S11ATHE3/I?
The HE3 suffix in SM5S11ATHE3/I denotes RoHS-compliant, matte tin-plated leads qualified to JESD 201 Class 2 for whisker resistance, and AEC-Q101 qualification. It also indicates packaging in 13" plastic tape and reel with anode oriented toward sprocket holes. This suffix confirms SM5S11ATHE3/I meets automotive reliability standards for solderability, long-term stability, and mechanical robustness in harsh environments.
SM5S11ATHE3/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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 198A
- 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
SM5S11ATHE3/I FAQ
1.How can I place an order for SM5S11ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S11ATHE3/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 SM5S11ATHE3/I reliable?
The price and inventory of SM5S11ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S11ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S11ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S11ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S11ATHE3/I?
SM5S11ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S11ATHE3/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 SM5S11ATHE3/I?
For technical support, including SM5S11ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S11ATHE3/I requirements.
6.How does Aetrix verify that SM5S11ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S11ATHE3/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 SM5S11ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S11ATHE3/I?
All SM5S11ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S11ATHE3/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 SM5S11ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S11ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S11ATHE3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
