My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM5S14CAHM3/I
- Part No.:
- SM5S14CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S14CAHM3/I.pdf
- Description:
- 3600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM5S14CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump and inductive switching surge protection. It features a 14.0 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 5 mA, 23.2 V maximum clamping voltage (VC) at 155 A peak pulse current, and 3600 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and rated for TJ = 175 °C operation in DO-218AC package.
For engineers reviewing the SM5S14CAHM3/I datasheet, SM5S14CAHM3/I pinout, SM5S14CAHM3/I application, or SM5S14CAHM3/I equivalent, this device serves as a high-reliability, halogen-free, RoHS-compliant TVS diode optimized for ISO 7637-2 and ISO 16750-2 compliance in 12 V automotive power networks - with critical attention to clamping performance, thermal robustness, and MSL Level 1 solderability.
Technical Context
This TVS operates as a voltage-clamped shunt protector: during transients exceeding VWM (14.0 V), it avalanches at VBR (min 15.6 V), limiting downstream voltage to ≤23.2 V at 155 A (10/1000 μs). Its DO-218AC package integrates a metal heatsink terminal for low RθJM (0.45 °C/W), enabling effective thermal dissipation under repetitive surge stress.
It is explicitly bidirectional with no cathode band, supports 175 °C junction operation, and meets JESD 201 Class 2 whisker resistance. The HM3 suffix confirms halogen-free, RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - Maximum continuous reverse operating voltage before conduction begins; defines system nominal bus tolerance margin. |
| VBR (min) | 15.6 V at 5 mA - Minimum avalanche initiation voltage; ensures reliable turn-on above normal operating range. |
| VC (max) | 23.2 V at IPPM = 155 A (10/1000 μs) - Peak clamped voltage seen by protected circuit; determines downstream IC survivability. |
| PPPM | 3600 W (10/1000 μs) - Surge energy handling capacity; enables compliance with ISO 7637-2 Pulse 5a load dump tests. |
| TJ max | +175 °C - Maximum junction temperature rating; supports under-hood automotive placement without derating penalties. |
| Package | DO-218AC - Surface-mount package with integrated metal heatsink terminal; provides low thermal resistance (RθJM = 0.45 °C/W). |
| Polarity | Bidirectional - Symmetric clamping for AC-coupled or floating systems; no polarity marking required on PCB layout. |
Pinout & Package
SM5S14CAHM3/I uses the DO-218AC package: a 2-terminal surface-mount device with a molded body and exposed metal heatsink base acting as Terminal 2. The package has no polarity marking; both terminals are electrically symmetric due to bidirectional design. Mounting pad layout follows IPC 7351 standards with recommended copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode-side lead) | Anode connection in unidirectional convention; functionally identical to Terminal 2 in bidirectional operation | Provides mechanical anchoring and electrical path; requires standard SMT reflow profile (peak 245 °C, MSL Level 1). |
| Terminal 2 (Metal heatsink base) | Cathode-side thermal and electrical node; primary heat extraction path | Serves as low-impedance thermal interface to PCB copper; must be connected to large thermal pad for RθJA = 65 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including temperature cycling, humidity bias, and surge endurance per stress test requirements. |
| ISO 7637-2 & ISO 16750-2 compliance | Meets Pulse 5a (load dump) and Pulse 1/2b (inductive switch-off) immunity thresholds without external circuitry. |
| 175 °C junction rating | Enables direct placement near high-temperature engine control units or power modules without thermal derating. |
| Low leakage ID ≤10 μA at VWM | Minimizes standby power loss in always-on vehicle subsystems such as body control modules or telematics. |
| Halogen-free, RoHS-compliant HM3 construction | Meets global environmental regulations and JESD 201 Class 2 whisker resistance for long-term solder joint integrity. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V battery-fed circuits during alternator load dump events (ISO 7637-2 Pulse 5a, up to 60 V/400 ms). IC Role / Device Role / Timing Role: Shunt clamping TVS placed upstream of DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤23.2 V, preventing latch-up or oxide breakdown in downstream 3.3 V/5 V logic and analog front-ends. |
Use Scenario: Safeguarding ECU main power rail against inductive switching spikes from fuel injectors, solenoids, and relays. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp responding within nanoseconds to sub-microsecond rise-time transients. Use Value: Withstands 155 A peak pulses while maintaining clamping below IC absolute maximum ratings - eliminating need for series fusing or additional filtering. |
| Body Control Module (BCM) Power Distribution | ADAS Camera Power Supply |
Use Scenario: Securing centralized power distribution nodes feeding door modules, lighting, and HVAC actuators. IC Role / Device Role / Timing Role: Primary surge suppression element on fused 12 V input bus before local regulators. Use Value: 3600 W peak power rating handles multiple simultaneous load dumps; bidirectional symmetry simplifies layout in shared-bus architectures. |
Use Scenario: Protecting 12 V input to camera modules in rear-view, surround-view, and driver-monitoring systems. IC Role / Device Role / Timing Role: Front-line transient suppressor before DC/DC and image sensor power conditioning. Use Value: Low 10 μA leakage at 14 V minimizes quiescent current draw - critical for parking-mode vision systems with strict battery drain limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A (Vishay) | DO-214AC package; lower PPPM (400 W); unidirectional; VBR = 15.6–17.2 V; VC = 23.2 V at 17.3 A | Limited to lower-energy transients; not AEC-Q101 qualified; unsuitable for load dump | Select only for cost-sensitive non-automotive industrial I/O protection where surge energy < 100 mJ. |
| TPSMD14CA (Texas Instruments) | DO-218AC package; same VWM/VBR/VC specs; AEC-Q101 qualified; PPPM = 3600 W; but higher ID = 50 μA at VWM | Higher leakage may impact ultra-low-power always-on functions; identical thermal and surge performance | Prefer when TI supply chain alignment is required; verify leakage sensitivity in battery-backed modules. |
Compared with SMAJ14A-E3/5A and TPSMD14CA, the SM5S14CAHM3/I delivers superior automotive-grade surge robustness via its 3600 W rating and 175 °C capability, while maintaining the lowest leakage (≤10 μA) among AEC-Q101-qualified 14 V DO-218AC TVS diodes - making it optimal for load dump-critical ECUs and BCMs.
Availability
SM5S14CAHM3/I is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and body control modules requiring stable component supply across extended temperature and high-surge environments.
Supply support for SM5S14CAHM3/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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM5SxxCA family is engineered specifically for high-energy automotive transient suppression, emphasizing AEC-Q101 qualification, 175 °C operation, and ISO 7637-2 compliance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the SM5S14CAHM3/I under standard surge conditions?
The SM5S14CAHM3/I has a maximum clamping voltage (VC) of 23.2 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 155 A. This value is measured per Figure 4 in the official Vishay datasheet (Doc. #98458) and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Is the SM5S14CAHM3/I suitable for automotive load dump protection per ISO 7637-2?
Yes, the SM5S14CAHM3/I is explicitly validated to meet ISO 7637-2 Pulse 5a (load dump) requirements. Its 3600 W peak pulse power rating, 175 °C junction capability, and AEC-Q101 qualification confirm suitability for protecting 12 V automotive power networks against sustained overvoltage events up to 60 V.
Does the SM5S14CAHM3/I have polarity markings on the package?
No, the SM5S14CAHM3/I is a bidirectional TVS diode and carries no cathode band or polarity marking. The DO-218AC package is symmetric in electrical function - both terminals perform identically during positive or negative transients - simplifying PCB layout and eliminating orientation errors during assembly.
What is the thermal resistance from junction to mount (RθJM) for the SM5S14CAHM3/I?
The SM5S14CAHM3/I has a typical junction-to-mount thermal resistance (RθJM) of 0.45 °C/W, measured using the Transient Dual Interface Test Method (TDIM) per JEDEC® 51-14. This low value is enabled by the metal heatsink base in the DO-218AC package and requires connection to a thermally robust PCB pad for optimal performance.
How does the HM3 suffix affect the SM5S14CAHM3/I's compliance status?
The HM3 suffix on SM5S14CAHM3/I denotes halogen-free, RoHS-compliant construction with matte tin-plated leads and JESD 201 Class 2 whisker resistance. It also confirms AEC-Q101 qualification - distinguishing it from industry-grade variants and ensuring suitability for automotive production environments with stringent material and reliability requirements.
SM5S14CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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
SM5S14CAHM3/I FAQ
1.How can I place an order for SM5S14CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14CAHM3/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 SM5S14CAHM3/I reliable?
The price and inventory of SM5S14CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S14CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S14CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14CAHM3/I?
SM5S14CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14CAHM3/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 SM5S14CAHM3/I?
For technical support, including SM5S14CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14CAHM3/I requirements.
6.How does Aetrix verify that SM5S14CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S14CAHM3/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 SM5S14CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S14CAHM3/I?
All SM5S14CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14CAHM3/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 SM5S14CAHM3/I part is unused and in its original packaging.
Return procedure for SM5S14CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14CAHM3/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 …
