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Vishay General Semiconductor - Diodes Division SMA5J14AHM3/I
- Part No.:
- SMA5J14AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14AHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,761
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Product details
Overview
SMA5J14AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (VBR), 23.2 V clamping voltage at 21.6 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive electronics.
For engineers reviewing the SMA5J14AHM3/I datasheet, SMA5J14AHM3/I pinout, SMA5J14AHM3/I application, or SMA5J14AHM3/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking guidance, and validated alternatives for automotive-grade overvoltage protection design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity indication, optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its glass-passivated junction ensures stable leakage performance (≤1.0 µA at VWM) and low incremental surge resistance across temperature.
Rated for -55 °C to +150 °C junction operation, it uses a thermally efficient SMA package with RθJA = 80 °C/W (on 5.0 mm × 5.0 mm copper pads) and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V automotive systems. |
| VBR min/max | 15.6 V / 17.2 V at 1.0 mA - Verified breakdown threshold ensures reliable turn-on during surges without premature conduction. |
| VC @ IPPM | 23.2 V at 21.6 A - Clamping voltage limits downstream IC stress during 500 W transient events per 10/1000 µs standard. |
| IPPM | 21.6 A - Peak surge current capacity enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 threats. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments with sustained thermal exposure. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated placement; 5.28 mm × 4.50 mm outline with cathode band marking. |
| Qualification | AEC-Q101 qualified (HM3 suffix) - Validated for automotive reliability including HTOL, TCT, and ESD testing per stress test plan. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, 0.208" × 0.177" body size, cathode indicated by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to protected line side; conducts only during forward-biased surge conditions (e.g., reverse-polarity fault). |
| Cathode | Clamping node / reference terminal | Marked with black band; tied to system ground or low-impedance return path to shunt surge energy away from ICs. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power (10/1000 µs) | Supports high-energy transients in automotive power nets without thermal runaway or parametric shift. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping-critical for protecting 16 V-tolerant microcontrollers and CAN transceivers. |
| AEC-Q101 qualified (HM3) | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per JEDEC standards. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination risk. |
| 1.0 µA max reverse leakage @ VWM | Prevents standby current drain in always-on vehicle modules such as body control units and telematics gateways. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs (e.g., lighting control modules) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 14 V. Use Value: Limits clamped voltage to 23.2 V during 21.6 A surges-within safe operating area of 28 V-rated power management ICs. |
Use Scenario: Shielding analog sensor inputs (e.g., pressure or temperature sensors in PLC I/O modules) from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, suppressing sub-100 ns transients without distorting mV-level signals. Use Value: 1.0 µA leakage preserves signal integrity in high-impedance sensor bridges; fast response prevents ADC latch-up. |
| Automotive CAN Bus Node Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary protection for high-speed CAN FD transceivers exposed to ISO 16750-2 supply transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS on VCC rail upstream of transceiver LDO, absorbing energy before regulator input stage. Use Value: 500 W rating handles repetitive pulses from ignition noise; AEC-Q101 qualification ensures long-term reliability in 15-year vehicle life. |
Use Scenario: Input-stage surge suppression in universal AC/DC adapters for smartphones and tablets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on rectified DC bus, triggered by lightning-induced surges on mains input. Use Value: 23.2 V clamping protects 24 V-rated primary-side controllers; UL 94 V-0 molding compound meets end-product flammability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14AHE3/I | Same electrical specs, but RoHS-compliant commercial grade (E3); lacks AEC-Q101 qualification and halogen-free certification. | Approved for industrial/commercial designs where automotive qualification is not required; lower cost for non-automotive BOMs. | Select SMA5J14AHE3/I when AEC-Q101 and halogen-free compliance are unnecessary and cost sensitivity is higher. |
| SMA6J14A-M3/5A | 600 W rating (vs. 500 W), same VWM/VC, identical SMA package; higher IPPM (24.3 A) and slightly higher VBR (15.6–17.8 V). | Targeted at designs requiring extended surge margin (e.g., heavy-duty truck electronics or railway auxiliary supplies). | Choose SMA6J14A-M3/5A when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires >500 W headroom. |
Compared with SMA5J14AHM3/I, SMA5J14AHE3/I offers identical clamping performance at lower qualification level, while SMA6J14A-M3/5A provides higher surge energy handling at marginally increased VBR-enabling trade-offs between automotive compliance, cost, and robustness.
Availability
SMA5J14AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.
Supply support for SMA5J14AHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments-specifically targeting automotive, industrial, and telecom infrastructure where compact size, thermal stability, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of the SMA5J14AHM3/I under maximum surge conditions?
The SMA5J14AHM3/I has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 21.6 A, measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SMA5J14AHM3/I suitable for automotive applications?
Yes, the SMA5J14AHM3/I is explicitly AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction. It is validated for automotive use cases including engine control units, body electronics, and infotainment systems where reliability under thermal cycling, humidity, and surge stress is critical.
How does the SMA5J14AHM3/I differ from the SMA5J14AHE3/I variant?
The SMA5J14AHM3/I and SMA5J14AHE3/I share identical electrical specifications (VWM, VBR, VC, PPPM), but differ in qualification: HM3 denotes AEC-Q101 qualification and halogen-free material, whereas HE3 is RoHS-compliant commercial grade without automotive qualification. Both use the same SMA (DO-214AC) package.
What is the thermal resistance of the SMA5J14AHM3/I in standard mounting conditions?
The SMA5J14AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC PCB layout and is used to calculate junction temperature rise under steady-state or repetitive surge conditions.
Does the SMA5J14AHM3/I have polarity marking, and how is it identified?
Yes, the SMA5J14AHM3/I is unidirectional and features a visible cathode band-a black marking near one end of the SMA (DO-214AC) package. Per Vishay documentation, the banded end is the cathode terminal and must be connected to the system ground or lowest potential reference point for proper clamping operation.
SMA5J14AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMA5J14AHM3/I FAQ
1.How can I place an order for SMA5J14AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14AHM3/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 SMA5J14AHM3/I reliable?
The price and inventory of SMA5J14AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14AHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J14AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14AHM3/I?
SMA5J14AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14AHM3/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 SMA5J14AHM3/I?
For technical support, including SMA5J14AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14AHM3/I requirements.
6.How does Aetrix verify that SMA5J14AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J14AHM3/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 SMA5J14AHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J14AHM3/I?
All SMA5J14AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14AHM3/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 SMA5J14AHM3/I part is unused and in its original packaging.
Return procedure for SMA5J14AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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