My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6S43ATHE3/I
- Part No.:
- SM6S43ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM6S43ATHE3/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,710
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6S43ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AC package, rated for 43 V stand-off voltage (VWM), 52.8 V maximum breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), 175 °C junction temperature, and AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM6S43ATHE3/I datasheet, SM6S43ATHE3/I pinout, SM6S43ATHE3/I application, or SM6S43ATHE3/I equivalent, key selection criteria include clamping voltage (69.4 V at IPPM), low leakage (<10 μA at VWM), high surge capability (150 A IPPM), thermal resistance (1.0 °C/W), and RoHS-compliant matte tin-plated leads meeting JESD 22-B102 solderability.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability. It delivers unidirectional clamping with 69.4 V max clamping voltage at 150 A peak pulse current and supports 10/1000 μs and 10/10,000 μs surge waveforms (3600 W and 2800 W respectively).
Designed for automotive-grade reliability, SM6S43ATHE3/I operates from –55 °C to +175 °C, meets ISO 7637-2 load dump requirements, and is qualified to AEC-Q101. Its DO-218AC case features UL 94 V-0 molding compound and heatsink-integrated anode polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 47.8 V / 52.8 V - breakdown occurs within this range at 5 mA test current |
| VC @ IPPM | 69.4 V - clamping voltage at 150 A peak pulse current (10/1000 μs), limiting downstream voltage stress |
| PPPM (10/1000 μs) | 3600 W - peak transient energy absorption capability under standard surge waveform |
| RθJC | 1.0 °C/W - thermal resistance from junction to case, enabling effective heatsinking in high-power transients |
| TJ max. | +175 °C - extended junction temperature rating supporting under-hood automotive environments |
| Polarity | Unidirectional - anode-connected heatsink configuration; blocks reverse current until breakdown threshold |
Pinout & Package
Package: DO-218AC - surface-mount, heatsink-integrated case with anode terminal on metal base (lead 2/heatsink), cathode on lead 1; UL 94 V-0 compliant, MSL Level 1, 245 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit's positive rail; conducts during transient clamp event |
| Lead 2 / Metal Heatsink | Anode | Electrically and thermally connected to PCB ground plane; serves as primary heat path and return path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift <0.093 %/°C and low leakage (<10 μA at VWM) over lifetime and temperature |
| TJ = 175 °C capability | Supports placement in high-ambient zones (e.g., engine control units) without derating penalties up to full rated power |
| Meets ISO 7637-2 | Validated for automotive load dump immunity per pulse 5a (10 ms exponential), critical for 12 V system compliance |
| AEC-Q101 qualified (HE3 suffix) | Guarantees qualification across temperature cycling, HTRB, UHAST, and ESD per automotive reliability standards |
| MSL Level 1, 245 °C peak | Allows single-pass lead-free reflow without moisture-induced failure risk |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V vehicle electrical systems against alternator load dump surges up to 40 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC/DC converter input to clamp transients before regulation stage. Use Value: Limits clamped voltage to 69.4 V at 150 A, preventing damage to downstream PMICs and microcontrollers rated ≤75 V. | Use Scenario: Safeguarding power inputs of engine management ECUs exposed to cranking dips and ignition noise. IC Role / Device Role / Timing Role: Primary transient suppression device on main 12 V supply line, mounted directly to chassis ground via heatsink. Use Value: Delivers 3600 W surge handling with 1.0 °C/W RθJC, maintaining junction temperature below 175 °C during repeated load dump events. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Interface |
Use Scenario: Securing power entry points in BCMs managing lighting, door locks, and HVAC functions. IC Role / Device Role / Timing Role: Standoff-rated TVS (43 V VWM) ensuring no conduction during normal operation while responding within nanoseconds to spikes. Use Value: Achieves <10 μA reverse leakage at 43 V, minimizing standby current drain in always-on modules. | Use Scenario: Protecting 12 V input of front-facing ADAS cameras subject to EMI and cable discharge events. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed upstream of buck converter and image sensor power domain. Use Value: Clamps 10/1000 μs transients to ≤69.4 V with sub-1 ns response time, preserving signal integrity in high-speed video links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S43AHM3 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free, matte tin plating, and enhanced whisker resistance (JESD 201 Class 2) | Identical load dump performance; preferred where stricter material compliance (e.g., automotive OEM Tier 1) is mandated | Select SM5S43AHM3 when halogen-free and whisker-resistant finish are required; HE3 remains valid for general AEC-Q101 applications |
| SMAJ43A | Lower PPPM (400 W), higher VC (70.1 V), DO-214AC package, RθJC ≈ 11.5 °C/W | Not suitable for high-energy load dump; limited to lower-energy ESD/surge events in non-automotive industrial use | Choose SMAJ43A only for cost-sensitive, lower-surge applications where 3600 W capability is unnecessary |
Compared with SM5S43AHM3, SM6S43ATHE3/I shares identical electrical ratings but differs in plating and whisker testing class; versus SMAJ43A, it delivers 9× higher surge power and 10× better thermal resistance-critical for automotive under-hood deployment.
Availability
SM6S43ATHE3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power input hardening, and body control module (BCM) power rail stabilization requiring stable component supply across long production lifecycles.
Supply support for SM6S43ATHE3/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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, high-temperature, and automotive-qualified solutions.
The SMxSxxAT family-including SM6S43ATHE3/I-is engineered specifically for high-energy transient suppression in 12 V automotive systems, targeting load dump, ISO 7637-2 compliance, and AEC-Q101 reliability under extreme thermal stress.
FAQ
What is the maximum clamping voltage of SM6S43ATHE3/I at its rated peak pulse current?
The SM6S43ATHE3/I has a maximum clamping voltage (VC) of 69.4 V at 150 A peak pulse current (IPPM) under the 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet revision 21-Mar-2024, and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The clamping performance ensures compatibility with 75 V-rated downstream ICs in automotive power domains.
Is SM6S43ATHE3/I qualified for automotive applications?
Yes, SM6S43ATHE3/I is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS compliance, matte tin plating, and JESD 201 Class 2 whisker resistance. It meets ISO 7637-2 load dump requirements and operates reliably from –55 °C to +175 °C, making it suitable for under-hood and powertrain applications where SM6S43ATHE3/I is deployed as primary transient suppression.
What package type does SM6S43ATHE3/I use, and how is polarity configured?
SM6S43ATHE3/I uses the DO-218AC surface-mount package with integrated metal heatsink. Polarity is unidirectional: the metal heatsink (lead 2) is the anode, and lead 1 is the cathode. This configuration requires the heatsink to be connected to system ground, enabling efficient thermal dissipation and correct transient conduction path in SM6S43ATHE3/I installations.
How does SM6S43ATHE3/I compare to SM5S43ATHE3/I in terms of electrical specifications?
SM6S43ATHE3/I and SM5S43ATHE3/I share identical key parameters: 43 V VWM, 47.8–52.8 V VBR, 69.4 V VC, 3600 W PPPM (10/1000 μs), and 175 °C TJ max. Both are AEC-Q101 qualified and DO-218AC packaged. The "6" vs "5" prefix reflects internal Vishay product segmentation but does not indicate functional or parametric differentiation for SM6S43ATHE3/I versus SM5S43ATHE3/I in published documentation.
What is the thermal resistance junction-to-case (RθJC) for SM6S43ATHE3/I, and why does it matter?
The SM6S43ATHE3/I has a typical RθJC of 1.0 °C/W, measured from silicon junction to the metal heatsink surface. This low value enables rapid heat transfer to the PCB ground plane, allowing sustained high-power surge handling without exceeding the 175 °C junction limit. In practice, this means SM6S43ATHE3/I can absorb repeated 3600 W transients with minimal thermal derating-critical for automotive load dump robustness.
SM6S43ATHE3/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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 66A
- Power - Peak Pulse:
- 4600W (4.6kW)
- 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
SM6S43ATHE3/I FAQ
1.How can I place an order for SM6S43ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S43ATHE3/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 SM6S43ATHE3/I reliable?
The price and inventory of SM6S43ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S43ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM6S43ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S43ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S43ATHE3/I?
SM6S43ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S43ATHE3/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 SM6S43ATHE3/I?
For technical support, including SM6S43ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S43ATHE3/I requirements.
6.How does Aetrix verify that SM6S43ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM6S43ATHE3/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 SM6S43ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM6S43ATHE3/I?
All SM6S43ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S43ATHE3/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 SM6S43ATHE3/I part is unused and in its original packaging.
Return procedure for SM6S43ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S43ATHE3/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 …
