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Vishay General Semiconductor - Diodes Division SMA5J14CAHM3/I
- Part No.:
- SMA5J14CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14CAHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,021
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Product details
Overview
SMA5J14CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 23.2 V at 21.6 A IPPM, and operates from –55 °C to +150 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J14CAHM3/I datasheet, SMA5J14CAHM3/I pinout, SMA5J14CAHM3/I application, or SMA5J14CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), bidirectional clamping behavior, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This device functions as a voltage-clamped crowbar during transients, responding in sub-nanosecond time with low incremental surge resistance and symmetrical reverse/forward conduction. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Rated for 500 W peak pulse power (10/1000 µs waveform), it delivers 23.2 V clamping at 21.6 A peak current while maintaining ≤1.0 µA leakage at 14 V - enabling robust protection without signal distortion in bidirectional data or supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 23.2 V at 21.6 A - clamping voltage limits downstream IC stress during 10/1000 µs surges (IEC 61000-4-5 Level 4). |
| PPPM | 500 W - peak transient energy absorption capacity under standardized surge waveform; enables single-device protection for medium-power nodes. |
| TJ max | +150 °C - supports operation in under-hood automotive and industrial environments without derating below full rating. |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on standard 5 mm × 5 mm copper pads; informs PCB layout cooling requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated leads solderable per J-STD-002/JESD22-B102. Bidirectional type - no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping behavior - either terminal serves as input/output; no orientation dependency in layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for ASIL-B sensor modules. |
| Glass passivated junction | Enhances long-term stability of VBR and leakage under humidity and thermal stress; reduces parameter drift over 15+ year service life. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a); improves clamping precision vs. Zener-based alternatives. |
| MSL Level 1 rating | Enables standard SMT reflow without baking or special handling - reduces manufacturing cost and process risk. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and inductive switching spikes in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal integrity with ≤23.2 V clamping at 21.6 A, preventing latch-up or damage to TI SN65HVD230 or NXP TJA1042. |
Use Scenario: Safeguarding RS-485/CAN FD differential pairs in factory automation gateways exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Common-mode TVS across A/B lines to suppress common-mode transients without distorting differential signaling. Use Value: Symmetrical 14 V VWM and 23.2 V VC ensure no DC bias shift or timing skew on 1 Mbps–5 Mbps bus traffic. |
| Consumer Power Adapter Input | Medical Diagnostic Signal Conditioning |
Use Scenario: Secondary-side overvoltage suppression in USB PD 3.0 adapters after DC-DC conversion, guarding against feedback loop failure. IC Role / Device Role / Timing Role: Standoff-regulated clamp parallel to output capacitor to limit fault voltage to safe levels for downstream USB-C controller. Use Value: 500 W PPPM handles sustained 100 ms overvoltage events without degradation, meeting UL 62368-1 transient immunity requirements. |
Use Scenario: Protecting analog front-end inputs of ECG/EEG acquisition circuits from ESD discharge during patient contact. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on electrode input traces to prevent amplifier saturation or input stage damage. Use Value: Sub-µA leakage at 14 V avoids DC offset errors; fast response preserves microvolt-level signal fidelity during 8 kV HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; uses SnPb-free matte tin plating without halogen restriction. | Approved for commercial-grade automotive modules where halogen-free is not mandated by OEM spec. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 qualification is retained. |
| SMA6J14CAHM3/I | 600 W PPPM (vs. 500 W), same VWM/VBR/VC; larger junction area increases thermal mass and surge margin. | Better suited for higher-energy threats (e.g., ISO 16750-2 pulse 5a) where 20% extra power headroom improves field reliability. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires extended lifetime under repeated transients. |
Compared with SMA5J14CAHM3/I, SMA5J14CAHE3/I offers identical protection performance without halogen-free compliance, while SMA6J14CAHM3/I provides higher surge margin at the cost of slightly larger footprint - both require no PCB redesign but differ in material compliance and energy rating.
Availability
SMA5J14CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapter outputs, and medical diagnostic signal paths requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMA5J14CAHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power-density solutions for automotive and industrial markets.
The SMA5J series targets compact, high-surge-capability transient protection in space-constrained applications - engineered specifically for AEC-Q101 compliance, automated SMT assembly, and robust performance across –55 °C to +150 °C.
FAQ
What is the clamping voltage of the SMA5J14CAHM3/I under a 10/1000 µs surge?
The SMA5J14CAHM3/I clamps to a maximum of 23.2 V at its rated peak pulse current of 21.6 A under a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and reflects worst-case voltage seen by downstream circuitry during standardized surge events. The SMA5J14CAHM3/I maintains this clamping performance across its full operating temperature range.
Is the SMA5J14CAHM3/I suitable for automotive applications?
Yes, the SMA5J14CAHM3/I is AEC-Q101 qualified and explicitly designated for automotive use with suffix HM3 indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It meets requirements for under-hood and cabin modules including engine control sensors, body electronics, and infotainment interfaces - validated for temperature cycling, HTRB, and surge endurance.
Does the SMA5J14CAHM3/I have polarity markings?
No, the SMA5J14CAHM3/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Its symmetrical structure allows installation in either orientation on PCB - both terminals behave identically during positive or negative transients, eliminating layout constraints associated with unidirectional devices.
What is the maximum leakage current of the SMA5J14CAHM3/I at its stand-off voltage?
The SMA5J14CAHM3/I exhibits a maximum reverse leakage current of 1.0 µA at its 14 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal power loss and signal interference in always-on monitoring circuits such as battery-backed sensors or medical front-ends where standby current budget is critical.
How does the thermal resistance of the SMA5J14CAHM3/I affect PCB layout?
The SMA5J14CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain safe junction temperatures during repeated surges, designers must allocate adequate copper area and avoid thermal bottlenecks - reducing pad size below specification increases RθJA and risks thermal runaway during high-duty-cycle transients.
SMA5J14CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 21.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J14CAHM3/I FAQ
1.How can I place an order for SMA5J14CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14CAHM3/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 SMA5J14CAHM3/I reliable?
The price and inventory of SMA5J14CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J14CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14CAHM3/I?
SMA5J14CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14CAHM3/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 SMA5J14CAHM3/I?
For technical support, including SMA5J14CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14CAHM3/I requirements.
6.How does Aetrix verify that SMA5J14CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J14CAHM3/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 SMA5J14CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J14CAHM3/I?
All SMA5J14CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14CAHM3/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 SMA5J14CAHM3/I part is unused and in its original packaging.
Return procedure for SMA5J14CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J14CAHM3/I Tags
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