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Vishay General Semiconductor - Diodes Division SMAJ16CAHE3_A/H
- Part No.:
- SMAJ16CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16CAHE3_A/H.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,193
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Product details
Overview
SMAJ16CAHE3_A/H 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 standoff voltage (VWM), 17.8–19.7 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤26.0 V at 15.4 A peak surge current - protecting MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ16CAHE3_A/H datasheet, SMAJ16CAHE3_A/H pinout, SMAJ16CAHE3_A/H application, or SMAJ16CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on PCBs requiring robust ESD and lightning surge protection.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 16 V), while the SMA package supports high thermal dissipation (RθJA = 120 °C/W) under transient stress.
The device meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive surge) immunity requirements when applied with proper PCB layout. Its 10/1000 μs waveform rating reflects standardized surge testing per ANSI/IEEE C62.35, and derating above 25 °C follows Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 16 V - Maximum continuous reverse voltage before significant conduction; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 17.8–19.7 V at 1 mA - Voltage at which device enters avalanche conduction; ensures reliable triggering during overvoltage events. |
| VC (Clamping Voltage) | ≤26.0 V at IPPM = 15.4 A - Peak voltage seen by protected circuit during 400 W transient; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Surge energy handling capacity; sufficient for automotive load-dump and inductive switching transients. |
| ID (Reverse Leakage) | ≤1.0 μA at 16 V - Minimal standby current; avoids signal distortion or power loss in high-impedance sensor or communication lines. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress; required for ECUs and ADAS modules. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; meets UL 94 V-0 and J-STD-002 solderability standards. No polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; no cathode band marking; interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails without polarity constraints. |
| 400 W peak pulse power | Handles repetitive 10/1000 μs surges up to 0.01% duty cycle - suitable for frequent inductive switch-offs in motor drivers and solenoid controls. |
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements; supports PPAP documentation and long-term field reliability in Tier-1 supply chains. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 3.3 V or 5 V logic-level interfaces adjacent to high-energy circuits. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; reduces manufacturing complexity and cost in high-volume SMT lines. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and relay driver outputs from load dump and alternator ripple in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input and signal pins to clamp transients before they reach MCU GPIO or level-shifter ICs. Use Value: Prevents latch-up or permanent damage to 5 V microcontrollers during 12 V system surges up to 400 W, meeting ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Shielding analog input channels (4–20 mA, 0–10 V) and digital outputs in programmable logic controllers exposed to factory floor EMI and relay coil kickback. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted at connector entry point to shunt induced surges away from precision ADC front-ends and optocoupler drivers. Use Value: Maintains signal integrity by limiting transient voltage to ≤26.0 V, ensuring measurement accuracy and preventing false triggering of solid-state outputs. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
|
Use Scenario: Safeguarding gate drivers and bootstrap circuits in BLDC motor inverters inside washing machines and HVAC systems. IC Role / Device Role / Timing Role: Fast-response TVS placed between half-bridge high-side/lower-side gate nodes and ground to suppress Miller-induced spikes. Use Value: Clamps sub-100 ns ringing events to <26 V, avoiding unintended IGBT/MOSFET turn-on and shoot-through failure during PWM switching. |
Use Scenario: Front-end surge suppression on 48 V DC telecom power inputs subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection network, working with MOVs and GDTs to limit let-through energy to downstream DC/DC converters. Use Value: Absorbs up to 400 W of transient energy with ≤26 V clamping, reducing secondary protection component stress and extending power supply MTBF. |
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-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMA package. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Choose SMAJ16CAHE3_A/H for standard automotive qualification; select SMAJ16CA-M3/61 only if halogen-free material declaration is contractually required. |
| SMBJ16CAHE3_A/H | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; higher 600 W PPPM rating; RθJA = 85 °C/W. | Better thermal performance and surge margin; requires larger PCB footprint and may not fit space-constrained layouts. | Prefer SMAJ16CAHE3_A/H for compact designs with ≤400 W surge exposure; use SMBJ16CAHE3_A/H where higher energy absorption or extended thermal headroom is needed. |
Compared with SMAJ16CA-M3/61, SMAJ16CAHE3_A/H offers identical protection performance with standard RoHS compliance; versus SMBJ16CAHE3_A/H, it trades 200 W peak power and lower thermal resistance for 30% smaller board area - making it optimal for dense automotive ECUs and portable industrial sensors.
Availability
SMAJ16CAHE3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, consumer appliance motor drives, and telecom power supply inputs requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ16CAHE3_A/H 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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific validation.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ESD, EFT, and surge is non-negotiable.
FAQ
What is the clamping voltage of SMAJ16CAHE3_A/H at its rated peak pulse current?
The SMAJ16CAHE3_A/H clamps to a maximum of 26.0 V at its peak pulse current of 15.4 A (10/1000 μs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream of the SMAJ16CAHE3_A/H.
Is SMAJ16CAHE3_A/H qualified for automotive applications?
Yes, SMAJ16CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet revision 09-Jan-2024. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMAJ16CAHE3_A/H suitable for engine control units, body control modules, and ADAS subsystems in passenger and commercial vehicles.
How does the bidirectional design of SMAJ16CAHE3_A/H affect its PCB layout?
The bidirectional design of SMAJ16CAHE3_A/H eliminates polarity constraints - there is no cathode band marking, and both terminals are functionally identical. This allows symmetrical placement across differential lines (e.g., CAN, RS-485) or ungrounded power rails without orientation checks during automated assembly, reducing placement errors and simplifying layout for noise-sensitive analog or communication paths protected by SMAJ16CAHE3_A/H.
What is the maximum operating temperature for SMAJ16CAHE3_A/H?
The SMAJ16CAHE3_A/H has a maximum junction temperature (TJ max.) of +150 °C, as specified in the Vishay datasheet. This rating enables reliable operation in under-hood automotive environments, industrial control cabinets, and enclosed power supplies where ambient temperatures exceed 105 °C - provided PCB copper pad area and airflow meet the recommended thermal design guidelines for the SMA package.
Does SMAJ16CAHE3_A/H meet RoHS and halogen-free requirements?
SMAJ16CAHE3_A/H is RoHS-compliant (per EU Directive 2011/65/EU) but not halogen-free; its "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification. For halogen-free compliance, the alternative SMAJ16CAHM3_A/H (suffix HM3) is available. Both variants share identical electrical performance, but material declarations differ - verify based on your environmental compliance program requirements for SMAJ16CAHE3_A/H.
SMAJ16CAHE3_A/H 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):
- 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_A/H FAQ
1.How can I place an order for SMAJ16CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16CAHE3_A/H 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_A/H reliable?
The price and inventory of SMAJ16CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ16CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16CAHE3_A/H?
SMAJ16CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16CAHE3_A/H 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_A/H?
For technical support, including SMAJ16CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ16CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ16CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ16CAHE3_A/H?
All SMAJ16CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMAJ16CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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