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Vishay General Semiconductor - Diodes Division SMAJ16CAHE3/5A
- Part No.:
- SMAJ16CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16CAHE3/5A.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ16CAHE3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown voltage (VBR) at 1 mA, 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ16CAHE3/5A datasheet, SMAJ16CAHE3/5A pinout, SMAJ16CAHE3/5A application, or SMAJ16CAHE3/5A equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, AEC-Q101 qualification, low incremental surge resistance, and UL 497B recognition are required in space-constrained PCB layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports automated placement and meets MSL level 1 reflow requirements up to 260 °C.
The device delivers 400 W peak pulse power (derated to 300 W above 78 V), with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It is rated for operating junction temperatures from –55 °C to +150 °C and qualified to AEC-Q101 for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 17.8 V / 19.7 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 26.0 V at 15.4 A - Clamped voltage under 10/1000 μs surge; limits stress on downstream components during transient events. |
| PPPM | 400 W (10/1000 μs) - Peak energy-handling capability; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| ID @ VWM | 1.0 μA - Reverse leakage at stand-off voltage; negligible power loss and minimal impact on high-impedance signal paths. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD performance per JESD22-A114. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | One terminal of symmetrical P-N junction; conducts during negative surges relative to cathode reference. |
| Cathode | Transient current entry (positive half-cycle) | Second terminal of symmetrical P-N junction; conducts during positive surges - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - e.g., CAN bus, RS-485, sensor bridges. |
| 400 W peak pulse power | Handles repetitive 10/1000 μs surges up to 0.01% duty cycle - suitable for load dump and inductive switching in 12 V/24 V automotive subsystems. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body controllers, and ADAS sensors requiring long-term field reliability. |
| UL 497B recognition (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and data line protectors - supports safety certification of end equipment. |
| MSL level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility (peak 260 °C), eliminating bake-out requirements in SMT assembly. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of LDOs and microcontrollers to limit transient voltage to ≤26.0 V. Use Value: Prevents latch-up and gate oxide damage in downstream ICs during ISO 7637-2 Pulse 5a (75 V/100 ms) events. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF at 0 V) bidirectional clamp on 0–5 V output lines interfacing with PLCs or DAQ systems. Use Value: Maintains signal integrity with <1 µA leakage at 16 V, avoiding DC offset errors in precision measurement circuits. |
| Telecom Interface Protection | Consumer Device USB Port Surge Suppression |
|
Use Scenario: Safeguarding RS-485 transceivers in building automation networks exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Differential pair protection using two SMAJ16CAHE3/5A devices in common-mode configuration. Use Value: Clamps common-mode transients to <26 V while preserving signal swing margin for compliant 1.5 V differential logic thresholds. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs after primary TVS filtering. IC Role / Device Role / Timing Role: Secondary bidirectional clamp with fast <1 ns response, placed adjacent to connector to reduce PCB trace inductance effects. Use Value: Survives ±15 kV contact ESD (IEC 61000-4-2) without degradation, verified by AEC-Q101 HBM testing (≥8 kV). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMA package. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution where halogen-free bill-of-materials is required; no layout or validation changes needed. |
| SMBJ16CAHE3/5A | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; higher thermal mass (RθJA = 80 °C/W vs. 120 °C/W). | Better power derating above 75 °C ambient; suited for high-reliability industrial power supplies with limited airflow. | Choose when thermal performance under sustained surge repetition is critical; requires PCB footprint change. |
Compared with SMAJ16CA-M3/5A, the SMAJ16CAHE3/5A offers identical protection performance with standard RoHS compliance, while SMBJ16CAHE3/5A trades smaller footprint for improved thermal dissipation - making it preferable in thermally constrained but high-surge-duty applications.
Availability
SMAJ16CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom line cards, and consumer USB protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ16CAHE3/5A 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and UL safety recognition in compact surface-mount packages.
FAQ
What does the "CA" suffix indicate in SMAJ16CAHE3/5A?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ16CAHE3/5A functions identically for both positive and negative voltage transients, unlike unidirectional "A" variants that conduct only in one direction. This eliminates polarity concerns during layout and enables use on AC-coupled or floating lines such as CAN, RS-485, or bridge sensor outputs - confirmed in Vishay's datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMAJ16CAHE3/5A suitable for IEC 61000-4-5 surge testing?
Yes, SMAJ16CAHE3/5A is rated for 400 W peak pulse power with a 10/1000 μs waveform - matching the energy profile of IEC 61000-4-5 Level 3 (1 kV open-circuit / 2 Ω source impedance). Its 26.0 V clamping voltage at 15.4 A ensures protected circuits remain within safe operating limits during standardized surge events, as validated in Vishay's "RATINGS AND CHARACTERISTICS CURVES".
Does SMAJ16CAHE3/5A require a heatsink for typical operation?
No, SMAJ16CAHE3/5A is designed for surface-mount operation without external heatsinking under normal transient conditions. Its thermal resistance (RθJA = 120 °C/W) assumes mounting on 0.2" × 0.2" copper pads per terminal - sufficient for single-event surges. Continuous power dissipation is limited to 3.3 W, so sustained DC stress must remain below this; for repetitive surges >0.01% duty cycle, board-level copper area should be increased per Vishay's fig. 2 derating curves.
How does the AEC-Q101 qualification of SMAJ16CAHE3/5A benefit automotive designs?
AEC-Q101 qualification confirms SMAJ16CAHE3/5A has passed accelerated stress tests including temperature cycling, high-temperature reverse bias, and ESD - ensuring reliability in automotive under-hood environments (-55 °C to +150 °C). This eliminates need for additional qualification effort by Tier 1 suppliers and supports PPAP documentation for ECUs, ADAS sensors, and infotainment systems using SMAJ16CAHE3/5A.
What is the maximum junction temperature rating for SMAJ16CAHE3/5A?
The maximum junction temperature (TJ max.) for SMAJ16CAHE3/5A is +150 °C, as specified in the "MAXIMUM RATINGS" table of Vishay document 88390. This rating applies under both transient and steady-state conditions, and the device maintains full electrical performance up to this limit - enabling use in high-ambient environments like engine compartments or industrial motor drives where thermal management is challenging.
SMAJ16CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ16CAHE3/5A FAQ
1.How can I place an order for SMAJ16CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16CAHE3/5A 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 SMAJ16CAHE3/5A reliable?
The price and inventory of SMAJ16CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ16CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16CAHE3/5A?
SMAJ16CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16CAHE3/5A 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 SMAJ16CAHE3/5A?
For technical support, including SMAJ16CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ16CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ16CAHE3/5A 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 SMAJ16CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ16CAHE3/5A?
All SMAJ16CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16CAHE3/5A, 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 SMAJ16CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ16CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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