My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM5S14AHE3/2D
- Part No.:
- SM5S14AHE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S14AHE3/2D.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,303
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM5S14AHE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 14.0 V stand-off voltage (VWM), 15.6–17.2 V breakdown range (VBR), 23.2 V clamping voltage at 155 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the SM5S14AHE3/2D datasheet, SM5S14AHE3/2D pinout, SM5S14AHE3/2D application, or SM5S14AHE3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB package thermal performance (RθJC = 1.0 °C/W), 175 °C junction rating, low leakage (<10 µA at VWM), and ISO7637-2 compliance for automotive transients.
Technical Context
The SM5S14AHE3/2D employs passivated anisotropic rectifier technology optimized for high-temperature stability and surge robustness. Its unidirectional architecture provides forward conduction during overvoltage events while maintaining low leakage (<10 µA at 14.0 V, TA = 25 °C) and low forward voltage (<2.0 V at 100 A).
It delivers 3600 W peak pulse power with 10/1000 µs waveform and sustains 2800 W with 10/10 000 µs waveform-critical for load dump immunity. The device operates across –55 °C to +175 °C and meets MSL Level 1 per J-STD-020 with 245 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 15.6 V / 17.2 V - Breakdown occurs within this range at 5 mA test current |
| VC @ IPPM | 23.2 V - Clamps transients to ≤23.2 V at 155 A peak pulse current |
| PPPM (10/1000 µs) | 3600 W - Sustains automotive load dump surges without failure |
| IFSM | 500 A - Withstands 8.3 ms half-sine surge without bond wire fusing |
| TJ max. | +175 °C - Enables placement near hot engine compartments |
| RθJC | 1.0 °C/W - Efficient heat transfer to heatsink for high-power dissipation |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink terminal; matte tin-plated leads; RoHS-compliant; AEC-Q101 qualified; MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Input cathode-side connection | Connected to protected line; conducts forward during clamping |
| Lead 2 / Metal Heatsink (Anode) | Primary thermal path & anode node | Serves as both electrical anode and mechanical thermal interface to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR drift <±5% over lifetime at 175 °C |
| High surge capability | 3600 W (10/1000 µs) enables single-device protection against ISO7637-2 Pulse 5a/b load dump |
| Low leakage current | <10 µA at 14.0 V and 25 °C minimizes standby power loss in always-on automotive modules |
| Thermal resistance | RθJC = 1.0 °C/W allows >4.5 W derated power at 125 °C case temperature |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, HTRB, and surge stress |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protecting 12 V power inputs of body control modules during alternator load dump events (ISO7637-2 Pulse 5). IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient spikes to ≤23.2 V within nanoseconds. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers without adding series impedance. | Use Scenario: Safeguarding LIN bus or sensor supply lines in engine bay environments exposed to repeated thermal cycling. IC Role / Device Role / Timing Role: Standby-mode protector absorbing repetitive low-energy transients while maintaining <10 µA leakage. Use Value: Ensures long-term reliability of ECU power rails without degrading signal integrity or increasing quiescent current. |
| Start-Stop System Power Rail Protection | ADAS Camera Module Power Input |
Use Scenario: Securing 12 V input of start-stop battery management circuits subjected to frequent cranking-induced transients. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp with 175 °C junction rating for sustained operation near battery terminals. Use Value: Maintains protection margin after 1000+ thermal cycles without parameter shift or parametric failure. | Use Scenario: Shielding image sensor power supplies in rear-view or surround-view cameras mounted near exhaust or radiator zones. IC Role / Device Role / Timing Role: Thermally robust TVS integrated into compact DO-218AB footprint to fit tight board space constraints. Use Value: Delivers 3600 W surge handling in <10 mm² PCB area while meeting AEC-Q101 for safety-critical vision systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Lower PPPM (400 W), SMA package, RθJC ≈ 50 °C/W, no AEC-Q101 | Not suitable for load dump; limited to low-energy ESD/surge in non-automotive consumer gear | Select only for cost-sensitive, non-automotive designs with <500 W surge requirements |
| TPSMD14A | Same DO-218AB package, 3600 W rating, but VBR = 15.6–17.8 V and VC = 23.8 V; AEC-Q101 qualified | Marginally higher clamping voltage reduces protected IC margin by ~0.6 V | Acceptable where 23.8 V clamping is within system OV threshold; verify layout thermal coupling |
Compared with SMAJ14A and TPSMD14A, the SM5S14AHE3/2D offers superior thermal performance (RθJC = 1.0 °C/W vs. ≥50 °C/W), guaranteed AEC-Q101 qualification, and tighter VBR tolerance-making it the preferred choice for production automotive power rail protection where thermal margin and qualification traceability are mandatory.
Availability
SM5S14AHE3/2D is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) input hardening, and ADAS camera module power conditioning requiring stable component supply, full AEC-Q101 documentation, and DO-218AB thermal performance.
Supply support for SM5S14AHE3/2D 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SM5SxxA family is engineered specifically for automotive-grade transient suppression-delivering high-temperature stability, ISO7637-2 compliance, and robust surge handling in thermally efficient DO-218AB packaging.
FAQ
What is the clamping voltage of the SM5S14AHE3/2D at its rated peak pulse current?
The SM5S14AHE3/2D has a maximum clamping voltage (VC) of 23.2 V when subjected to its specified peak pulse current of 155 A using a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C) and ensures downstream circuitry remains below critical overvoltage thresholds during automotive load dump events. The SM5S14AHE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM5S14AHE3/2D suitable for bidirectional transient protection?
No, the SM5S14AHE3/2D is a unidirectional TVS diode and must be used with correct polarity-its metal heatsink terminal is the anode. It does not provide symmetrical clamping for AC or bipolar transients. For bidirectional protection, a dedicated bidirectional device such as the SMBJ14CA or equivalent is required. The SM5S14AHE3/2D datasheet explicitly states "Available in uni-directional polarity only."
Does the SM5S14AHE3/2D meet AEC-Q101 qualification?
Yes, the SM5S14AHE3/2D is fully AEC-Q101 qualified, as confirmed in the Vishay document 88382 (Revision: 22-Jul-16). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge robustness-validating its suitability for automotive under-hood applications. The HE3 suffix denotes RoHS compliance and AEC-Q101 qualification per the ordering information table.
What is the thermal resistance from junction to case for the SM5S14AHE3/2D?
The SM5S14AHE3/2D has a typical thermal resistance from junction to case (RθJC) of 1.0 °C/W, as specified in the Thermal Characteristics section of the Vishay datasheet. This low value enables efficient heat transfer to the PCB copper pour or external heatsink, supporting reliable operation at elevated ambient temperatures up to 175 °C junction temperature. Proper thermal pad layout per the DO-218AB mounting diagram is essential to achieve this rating.
Can the SM5S14AHE3/2D be used in place of the SM5S14HE3/2D?
No-the SM5S14AHE3/2D and SM5S14HE3/2D are distinct variants. The "A" suffix indicates tighter VBR tolerance (15.6–17.2 V vs. 15.6–19.1 V for SM5S14), lower clamping voltage (23.2 V vs. 25.8 V), and improved consistency for precision protection. Substituting them requires validation of system-level clamping margin and surge energy absorption. The SM5S14AHE3/2D is not a drop-in replacement for SM5S14HE3/2D without design review.
SM5S14AHE3/2D 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 155A
- 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-218AB
SM5S14AHE3/2D FAQ
1.How can I place an order for SM5S14AHE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14AHE3/2D 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 SM5S14AHE3/2D reliable?
The price and inventory of SM5S14AHE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S14AHE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S14AHE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14AHE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14AHE3/2D?
SM5S14AHE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14AHE3/2D 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 SM5S14AHE3/2D?
For technical support, including SM5S14AHE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14AHE3/2D requirements.
6.How does Aetrix verify that SM5S14AHE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S14AHE3/2D 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 SM5S14AHE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S14AHE3/2D?
All SM5S14AHE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14AHE3/2D, 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 SM5S14AHE3/2D part is unused and in its original packaging.
Return procedure for SM5S14AHE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14AHE3/2D 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 …
