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Vishay General Semiconductor - Diodes Division SMA5J14A-E3/5A
- Part No.:
- SMA5J14A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14A-E3/5A.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J14A-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 14 V stand-off 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J14A-E3/5A datasheet, SMA5J14A-E3/5A pinout, SMA5J14A-E3/5A application, or SMA5J14A-E3/5A equivalent, key selection criteria include verified unidirectional polarity, clamping performance under 21.6 A surge, thermal resistance (RθJA = 80 °C/W), AEC-Q101 qualification eligibility (via HE3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling consistent clamping during repetitive transients up to 150 °C junction temperature.
Designed for single-polarity DC protection, it delivers 23.2 V clamping at 21.6 A (10/1000 µs), with <1 ns response time and 800 µA max reverse leakage at 14 V. The SMA package supports JEDEC-compliant reflow (MSL Level 1, 260 °C peak), and its cathode band marking enables unambiguous orientation during assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 15.6 V / 17.2 V - Verified breakdown threshold range at 1 mA test current; ensures reliable turn-on without premature leakage. |
| VC @ IPPM | 23.2 V - Clamped voltage at 21.6 A peak pulse; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; sustains 1× or repetitive surges per JEDEC JESD22-A114F. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; enables thermal design for 150 °C TJ max. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current immunity in power-up scenarios. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by black band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to system ground or low-side reference; completes clamping loop when cathode is tied to protected line. |
| Cathode | Protected line connection / avalanche node | Mounted directly to rail requiring protection (e.g., 12 V supply or CAN_H); initiates clamping upon overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact layout in space-constrained automotive ECUs and industrial PLC I/O modules without height clearance issues. |
| Glass-passivated junction | Ensures long-term VBR stability and reduced parameter drift across 1000+ thermal cycles (−55 °C to +150 °C). |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without popcorn cracking or delamination risk. |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive-grade deployment; this E3/5A variant shares identical die and construction. |
| 800 µA max ID @ VWM | Minimizes standby power loss in always-on battery-backed circuits such as telematics wake-up receivers. |
Applications
| Automotive Sensor Protection | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting 12 V supply and signal lines of ABS wheel speed sensors against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VCC and chassis ground, absorbing >500 W spikes within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in Hall-effect ICs by limiting voltage excursion to ≤23.2 V during ISO 7637-2 Pulse 5a (75 V/300 ms). |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at terminal block, shunting surge energy before optocoupler input stage. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (2 kV line-earth) without additional series impedance or filtering complexity. |
| Consumer Power Adapter Output | Telecom Line Card Interface |
Use Scenario: Secondary-side overvoltage suppression on 12 V/19 V outputs of AC-DC adapters used in laptops and monitors. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across output capacitor to clamp regulator failure modes and lightning-induced surges. Use Value: Limits fault voltage to 23.2 V, protecting downstream USB-PD controllers and display interface ICs rated for ≤28 V absolute maximum. |
Use Scenario: DC feed line protection in VoIP gateway line cards where -48 V PSE supplies power over twisted pair. IC Role / Device Role / Timing Role: Unidirectional suppressor installed between tip/ring and ground to absorb longitudinal surges while preserving common-mode integrity. Use Value: Maintains <10 pF junction capacitance at 0 V bias (per Fig. 4), avoiding signal integrity degradation on 100BASE-TX data paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and thermal performance; same SMA package and marking. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct drop-in replacement for SMA5J14A-E3/5A where halogen content must be zero; no layout or qualification change required. |
| SMA6J14A-E3/5A | 600 W peak pulse power (vs. 500 W), higher IPPM (25.7 A), same VWM/VC; larger thermal mass but same SMA footprint. | Better suited for systems requiring higher surge margin (e.g., heavy-duty industrial motor drives with frequent contactor switching). | Select SMA6J14A-E3/5A only if design requires ≥600 W surge rating; otherwise SMA5J14A-E3/5A provides optimal cost/performance balance for 500 W needs. |
Compared with SMA5J14A-M3/5A, the E3/5A offers standard RoHS compliance without halogen restriction; compared with SMA6J14A-E3/5A, it trades 100 W pulse headroom for lower unit cost and proven fit in legacy 500 W surge designs.
Availability
SMA5J14A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and consumer power adapter outputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMA5J14A-E3/5A 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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J family targets high-power-density transient suppression in space-constrained environments, with design focus on fast clamping, low thermal resistance, and robustness in harsh automotive and industrial settings.
FAQ
What is the clamping voltage of the SMA5J14A-E3/5A under maximum surge conditions?
The SMA5J14A-E3/5A clamps to 23.2 V at its rated peak pulse current of 21.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. It represents the maximum voltage seen by downstream circuitry during a worst-case transient event, making SMA5J14A-E3/5A suitable for protecting 12 V systems with 28 V-tolerant ICs.
Is the SMA5J14A-E3/5A suitable for automotive applications?
The SMA5J14A-E3/5A uses the same die and construction as AEC-Q101-qualified variants (e.g., SMA5J14AHE3_A), and Vishay explicitly states AEC-Q101 qualification is available for this family via HE3/HM3 suffixes. While the E3/5A itself is commercial-grade, its design basis, thermal performance (TJ max = 150 °C), and surge robustness align with automotive requirements - enabling use in non-safety-critical modules like body control units when validated per customer qualification protocols.
What does the "E3/5A" suffix indicate in SMA5J14A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade packaging with matte tin-plated leads; "5A" specifies the packaging format: 7500 units per 13-inch plastic tape-and-reel. This differs from "E3/61", which uses 7-inch reels with 1800 units. Both share identical electrical and thermal specifications - the suffix solely defines environmental compliance level and logistics configuration for SMA5J14A-E3/5A.
How does the SMA5J14A-E3/5A compare to bidirectional TVS diodes like SMA5J14CA?
The SMA5J14A-E3/5A is unidirectional and includes polarity marking (cathode band), allowing it to conduct forward surge current up to 40 A (IFSM). In contrast, SMA5J14CA is bidirectional with no polarity marking and no IFSM rating. Use SMA5J14A-E3/5A for DC rail protection where forward conduction matters; choose SMA5J14CA only for AC or differential signal lines requiring symmetrical clamping in both directions.
What PCB pad layout is recommended for optimal thermal performance of SMA5J14A-E3/5A?
Vishay specifies mounting SMA5J14A-E3/5A on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the published RθJA of 80 °C/W and sustain full 500 W pulse power. Smaller pads increase thermal resistance and reduce surge capability - derating curves in Figure 2 of the datasheet show >20 % power loss at 3.0 mm × 3.0 mm pads. Always follow the DO-214AC outline dimensions and thermal pad recommendations for SMA5J14A-E3/5A.
SMA5J14A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J14A-E3/5A FAQ
1.How can I place an order for SMA5J14A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14A-E3/5A 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 SMA5J14A-E3/5A reliable?
The price and inventory of SMA5J14A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J14A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J14A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14A-E3/5A?
SMA5J14A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14A-E3/5A 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 SMA5J14A-E3/5A?
For technical support, including SMA5J14A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14A-E3/5A requirements.
6.How does Aetrix verify that SMA5J14A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J14A-E3/5A 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 SMA5J14A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J14A-E3/5A?
All SMA5J14A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14A-E3/5A, 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 SMA5J14A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J14A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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