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Vishay General Semiconductor - Diodes Division SMA5J14CHE3/5A
- Part No.:
- SMA5J14CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14CHE3/5A.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,950
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Product details
Overview
SMA5J14CHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails 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 (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect automotive ECUs, industrial I/O modules, and power supply inputs against ESD and load dump transients.
For engineers reviewing the SMA5J14CHE3/5A datasheet, SMA5J14CHE3/5A pinout, SMA5J14CHE3/5A application, or SMA5J14CHE3/5A equivalent, key selection criteria include its unidirectional polarity, 150 °C max junction temperature, RoHS-compliant HE3 suffix (AEC-Q101 qualified), low incremental surge resistance, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode optimized for fast clamping of transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its DO-214AC package provides thermal resistance of 25 °C/W (junction-to-lead) and meets MSL Level 1 (260 °C reflow peak).
The SMA5J14CHE3/5A is rated for non-repetitive 8.3 ms half-sine surge current up to 40 A (IFSM) and exhibits typical junction capacitance <100 pF at VWM, making it suitable for both power rail and moderate-speed signal line protection where low capacitance and robust energy handling are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin. |
| VBR (min/max) | 15.6 V / 17.2 V - Measured at 1 mA test current; guarantees reliable avalanche initiation across production lot. |
| VC @ IPPM | 23.2 V - Clamped voltage at 21.6 A peak pulse (10/1000 µs); determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - Peak pulse power dissipation capability; enables survival of high-energy transients per ISO 7637-2 Pulse 1/2a/5a. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Polarity | Unidirectional - Cathode band marked; blocks forward current until VF ≈ 3.5 V at 25 A, enabling DC rail protection. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0. Matte tin-plated leads, solderable per J-STD-002/JESD 22-B102. Cathode band denotes terminal polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; carries full surge current during clamping. |
| Cathode | Reverse-biased blocking terminal / Clamping output | Connected to protected line (e.g., 12 V rail); initiates avalanche conduction when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) over temperature and lifetime. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs. |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements. |
| 500 W peak pulse power (10/1000 µs) | Supports compliance with ISO 7637-2 and IEC 61000-4-5 Level 3/4 surge immunity testing. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power supplies in engine control units against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VIN and GND, clamping surges within 1 ns response time. Use Value: Limits voltage to ≤23.2 V during 21.6 A transients, preventing damage to 3.3 V/5 V LDOs and MCU VCC pins. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on field-side input traces, absorbing repetitive 500 W pulses without degradation. Use Value: Maintains <1.0 µA leakage at 24 V nominal, ensuring clean logic thresholds while surviving >1000 surges per IEC 61000-4-5. |
| DC-DC Converter Input Stage | Automotive Sensor Signal Line Protection |
Use Scenario: Front-end surge suppression for buck converter inputs in ADAS camera modules powered from vehicle battery. IC Role / Device Role / Timing Role: Primary transient clamp upstream of input filter capacitor, conducting surge energy to chassis ground. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), protecting MOSFET gate drivers and controller ICs from latch-up. |
Use Scenario: ESD and cable discharge protection on LIN bus or analog sensor outputs (e.g., temperature, pressure) in cabin modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on signal line referenced to local ground, minimizing signal distortion. Use Value: Junction capacitance <100 pF at 14 V allows use on signals up to ~1 MHz without bandwidth degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14A-E3/5A | Same electrical specs but commercial-grade (non-AEC-Q101); no HE3 whisker qualification. | Lacks automotive qualification; suitable for industrial/commercial power supplies only. | Select SMA5J14A-E3/5A only if AEC-Q101 is not required and cost is prioritized. |
| SMC5J14AHE3/5A | Same VWM/VBR/VC, but in larger DO-214AB (SMC) package with higher IPPM (32.5 A) and PPPM (1500 W). | Higher surge rating suits heavy-duty industrial motor drives; requires larger PCB footprint. | Choose SMC5J14AHE3/5A when system-level surge tests exceed 500 W or require >21.6 A IPPM. |
Compared with SMA5J14A-E3/5A, the SMA5J14CHE3/5A adds AEC-Q101 qualification and enhanced whisker resistance (JESD 201 Class 2), while SMC5J14AHE3/5A trades compact size for 3× higher surge capacity-making SMA5J14CHE3/5A optimal for space-constrained automotive modules needing certified reliability.
Availability
SMA5J14CHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and DC-DC converter input stages requiring stable component supply, AEC-Q101 compliance, and high-volume tape-and-reel delivery.
Supply support for SMA5J14CHE3/5A 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMA5J series is engineered specifically for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 surges is mandatory.
FAQ
What is the polarity configuration of the SMA5J14CHE3/5A?
The SMA5J14CHE3/5A is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the DO-214AC (SMA) package body. When installed with the banded end toward the protected line (e.g., 12 V rail) and anode to ground, it blocks reverse current up to 14 V and clamps positive transients above its breakdown voltage. This configuration is essential for DC power rail protection and differs from bi-directional variants like SMA5J14CA.
Does the SMA5J14CHE3/5A meet automotive qualification standards?
Yes, the SMA5J14CHE3/5A is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8 kV), validating its suitability for under-hood and cabin automotive applications such as engine control units and body control modules.
What is the clamping voltage of the SMA5J14CHE3/5A at its rated peak pulse current?
The SMA5J14CHE3/5A has a maximum clamping voltage (VC) of 23.2 V when subjected to its specified peak pulse current (IPPM) of 21.6 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on minimum recommended copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the HE3 suffix differ from the E3 suffix in SMA5J14CHE3/5A?
The "HE3" suffix in SMA5J14CHE3/5A indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. In contrast, the "E3" suffix (e.g., SMA5J14A-E3/5A) denotes RoHS compliance only, without automotive qualification or enhanced whisker testing-making HE3 mandatory for automotive designs and E3 acceptable for commercial-grade applications.
Can the SMA5J14CHE3/5A be used in bi-directional transient protection applications?
No, the SMA5J14CHE3/5A is strictly unidirectional and must not be used for bi-directional protection. Bi-directional operation requires a CA-suffixed variant such as SMA5J14CA, which lacks polarity marking and conducts symmetrically in both directions. Using SMA5J14CHE3/5A in a bi-directional configuration risks failure during negative-going transients due to forward conduction limits.
SMA5J14CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J14CHE3/5A FAQ
1.How can I place an order for SMA5J14CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14CHE3/5A 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 SMA5J14CHE3/5A reliable?
The price and inventory of SMA5J14CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J14CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14CHE3/5A?
SMA5J14CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14CHE3/5A 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 SMA5J14CHE3/5A?
For technical support, including SMA5J14CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14CHE3/5A requirements.
6.How does Aetrix verify that SMA5J14CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J14CHE3/5A 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 SMA5J14CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J14CHE3/5A?
All SMA5J14CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14CHE3/5A, 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 SMA5J14CHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J14CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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