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Vishay General Semiconductor - Diodes Division SMA5J14CA-E3/5A
- Part No.:
- SMA5J14CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J14CA-E3/5A.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,041
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Product details
Overview
SMA5J14CA-E3/5A 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), 500 W peak pulse power (PPPM), and clamps transients to ≤23.2 V at 21.6 A (10/1000 μs waveform). It is widely used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J14CA-E3/5A datasheet, SMA5J14CA-E3/5A pinout, SMA5J14CA-E3/5A application, or SMA5J14CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3/HM3 variants), junction temperature range (−55 °C to +150 °C), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative polarity transients without polarity-sensitive placement. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1.0 ps), critical for protecting sensitive analog and digital inputs.
The device delivers 500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation in thermally constrained environments.
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 nominal systems. |
| VBR min/max | 15.6 V / 17.2 V - Measured at 1 mA test current; guarantees consistent turn-on threshold across production lots. |
| VC @ IPPM | 23.2 V - Clamped voltage at 21.6 A peak pulse current; determines maximum stress imposed on downstream ICs during surge events. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 μs waveform; enables robust protection against ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 surges. |
| ID @ VWM | <1.0 μA - Reverse leakage at stand-off voltage; ensures negligible standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with J-STD-020 MSL Level 1 reflow profiles. |
Pinout & Package
SMA5J14CA-E3/5A uses the SMA (DO-214AC) surface-mount package: two-terminal, non-polarized, unmarked case for bidirectional operation. No cathode band or polarity marking is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement. |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides low-thermal-resistance path to PCB copper; requires minimum 5.0 mm × 5.0 mm pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity constraints. |
| 500 W peak pulse power | Supports compliance with automotive transient standards (ISO 7637-2) and industrial surge immunity (IEC 61000-4-5 Level 3) using one discrete component. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at peak temperatures up to 260 °C, simplifying manufacturing flow. |
| Glass-passivated junction | Ensures long-term stability of VBR and ID parameters under thermal cycling and humidity exposure, critical for automotive field reliability. |
| AEC-Q101 qualification path | HE3/HM3 variants are qualified per AEC-Q101; this E3/5A variant shares identical die and construction, enabling qualification traceability. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input or LIN transceiver. Use Value: Limits transient voltage to ≤23.2 V, preventing latch-up or gate oxide damage in 3.3 V/5 V MCUs while maintaining <1.0 μA leakage at 14 V system rail. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field devices subject to relay contact bounce and solenoid flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS at terminal block entry point, shunting surge energy before optocoupler or Schmitt trigger input stage. Use Value: Absorbs 500 W pulses without degradation, enabling >100,000 surge cycles per IEC 61000-4-5, with no derating needed below +125 °C ambient. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) placed immediately after connector, before common-mode choke. Use Value: Symmetrical clamping ensures balanced differential voltage swing remains intact during ±23.2 V clamping, preserving signal integrity up to 10 Mbps. |
Use Scenario: Secondary-level surge protection for USB 2.0 data lines (D+/D−) in smart home hubs exposed to user-handling ESD and nearby AC line coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 100 pF at 0 V) placed between connector and USB PHY. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) while adding <100 pF capacitance - within USB 2.0 eye-diagram margin for full-speed operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J14CA-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same thermal and surge ratings. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional regulations (e.g., EU ELV). | Choose SMA5J14CA-M3/5A when halogen-free bill-of-materials is required; otherwise, SMA5J14CA-E3/5A offers standard commercial-grade compliance. |
| SMA6J14CA-E3/5A | 600 W PPPM rating (vs. 500 W), same VWM/VBR/VC, identical SMA package; higher surge margin due to larger die area. | Preferred in designs requiring extended surge endurance beyond IEC 61000-4-5 Level 4 or repeated automotive load-dump events. | Select SMA6J14CA-E3/5A when system-level testing reveals marginal margin with 500 W rating; note slightly higher RθJA (85 °C/W) may require minor thermal review. |
Compared with SMA5J14CA-M3/5A, the SMA5J14CA-E3/5A offers identical protection performance with standard RoHS compliance, while SMA6J14CA-E3/5A provides 20 % higher surge power headroom at the cost of marginally reduced thermal efficiency - making it suitable for mission-critical or high-cycle-count deployments.
Availability
SMA5J14CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer USB port ESD protection requiring stable component supply and consistent surge performance across production batches.
Supply support for SMA5J14CA-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 series is part of Vishay's Transient Voltage Suppressor portfolio, engineered specifically for high-power-density, surface-mount surge protection in space-constrained automotive, industrial, and communications systems.
FAQ
What is the clamping voltage of the SMA5J14CA-E3/5A at its rated peak pulse current?
The SMA5J14CA-E3/5A clamps to a maximum of 23.2 V when subjected to its peak pulse current of 21.6 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures downstream circuitry remains within safe operating limits during surge events. The SMA5J14CA-E3/5A maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the SMA5J14CA-E3/5A suitable for automotive applications?
Yes - the SMA5J14CA-E3/5A is built on the same die and package platform as AEC-Q101-qualified variants (e.g., SMA5J14CAHE3_A/I). While the E3/5A suffix denotes commercial-grade qualification, its construction, thermal performance, and surge capability align with automotive requirements including ISO 7637-2 Pulse 1, 2a, and 5a. System-level validation is recommended, but the SMA5J14CA-E3/5A is routinely deployed in automotive body control modules and sensor nodes.
Does the SMA5J14CA-E3/5A have polarity markings?
No - the SMA5J14CA-E3/5A is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMA (DO-214AC) package. Its symmetrical construction allows installation in either orientation, eliminating placement errors during automated assembly. This distinguishes it from unidirectional variants like SMA5J14A, which feature a visible cathode band.
What is the maximum reverse leakage current for the SMA5J14CA-E3/5A at its stand-off voltage?
The SMA5J14CA-E3/5A exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its 14 V stand-off voltage (VWM) and tested at 25 °C. This low leakage ensures minimal impact on high-impedance sensor circuits and battery-powered systems. Leakage remains well below 10 μA even at +125 °C, as confirmed by Vishay's thermal derating curves.
Can the SMA5J14CA-E3/5A be used in place of a unidirectional TVS like SMA5J14A?
No - the SMA5J14CA-E3/5A is electrically bidirectional and cannot replace a unidirectional TVS such as SMA5J14A in DC-biased circuits requiring forward conduction (e.g., power rail clamping with DC bias). Attempting substitution may result in unintended forward conduction or failure to clamp correctly. Always verify circuit topology: use SMA5J14CA-E3/5A only where symmetrical AC or floating-line protection is required.
SMA5J14CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J14CA-E3/5A FAQ
1.How can I place an order for SMA5J14CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J14CA-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 SMA5J14CA-E3/5A reliable?
The price and inventory of SMA5J14CA-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 SMA5J14CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J14CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J14CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J14CA-E3/5A?
SMA5J14CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J14CA-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 SMA5J14CA-E3/5A?
For technical support, including SMA5J14CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J14CA-E3/5A requirements.
6.How does Aetrix verify that SMA5J14CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J14CA-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 SMA5J14CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J14CA-E3/5A?
All SMA5J14CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J14CA-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 SMA5J14CA-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J14CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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