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Vishay General Semiconductor - Diodes Division SMAJ16A-E3/61
- Part No.:
- SMAJ16A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16A-E3/61.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:20,565
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Product details
Overview
SMAJ16A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 16 V stand-off voltage (VWM), 26.0 V maximum clamping voltage at 15.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail conditioning.
For engineers reviewing the SMAJ16A-E3/61 datasheet, SMAJ16A-E3/61 pinout, SMAJ16A-E3/61 application, or SMAJ16A-E3/61 equivalent, key selection criteria include unidirectional polarity, 17.8–19.7 V breakdown voltage range at 1 mA test current, junction temperature limit of +150 °C, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction enables sub-nanosecond response to transients, while low incremental surge resistance ensures stable clamping under repetitive 10/1000 μs surges at 0.01% duty cycle.
The SMAJ16A-E3/61 is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports -55 °C to +150 °C operating junction range, and meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C - confirming suitability for high-reliability commercial and AEC-Q101-qualified automotive designs when ordered with HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V nominal DC rails. |
| VBR min/max | 17.8 V / 19.7 V at IT = 1 mA - guaranteed avalanche onset window; ensures consistent triggering across production lots. |
| VC @ IPPM | 26.0 V at 15.4 A - clamped voltage during 10/1000 μs surge; protects downstream ICs rated ≤ 30 V absolute max. |
| PPPM | 400 W - peak pulse power handling capability; sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at stand-off voltage; avoids parasitic loading on high-impedance sensor lines. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking on body; anode is unmarked end. Complies with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line (e.g., VBUS, CAN_H); conducts during overvoltage to shunt energy to ground. |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against automotive load dump and inductive switching spikes without derating below 78 V. |
| Glass passivated junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress, critical for industrial field deployments. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement into reflow without baking - reduces manufacturing overhead in high-volume SMT lines. |
| RoHS-compliant, matte tin plating | Supports lead-free assembly per J-STD-002 and JESD 22-B102; eliminates whisker risk per JESD 201 Class 2. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to protected ICs - e.g., 26.0 V clamp vs. 19.7 V breakdown delivers tight protection margin. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from ISO 16750-2 battery dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input, referenced to chassis ground. Use Value: Clamps transients to ≤26.0 V within nanoseconds, preserving signal integrity and preventing ADC saturation or latch-up in 3.3 V/5 V MCU front-ends. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point, shunting surge current away from optocoupler input stage. Use Value: Withstands 400 W pulses and 40 A surge current, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without external series impedance. |
| DC Power Rail Conditioning | USB/Serial Signal Line Protection |
|
Use Scenario: Secondary overvoltage protection on 12 V supply rails feeding infotainment head units and ADAS camera modules. IC Role / Device Role / Timing Role: Parallel-connected TVS across VCC-GND, activated only during fault conditions exceeding 16 V. Use Value: 1.0 μA leakage at 16 V prevents standby current degradation; 120 °C/W RθJA allows thermal design with minimal copper area. |
Use Scenario: ESD suppression on RS-485 transceiver data lines (A/B) in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional protection not applicable here; SMAJ16A-E3/61 used unidirectionally on single-ended bias lines or VCC-supply pins. Use Value: Sub-ns response time and 26.0 V clamping prevent transceiver damage from ±8 kV HBM ESD strikes per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16CA-E3/61 | Bidirectional variant; symmetric breakdown (17.8–19.7 V) in both polarities; same VWM, VC, and PPPM ratings. | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY pairs, audio differential inputs) where polarity reversal occurs. | Select SMAJ16CA-E3/61 only when bidirectional clamping is mandated; SMAJ16A-E3/61 is preferred for DC-biased rails with defined ground reference. |
| SMBJ16A-E3/52 | Same electrical specs but in larger SMB (DO-214AA) package; 600 W PPPM rating (vs. 400 W); RθJA = 80 °C/W. | Higher power handling and improved thermal performance suit higher-energy surge environments (e.g., outdoor telecom power supplies). | Choose SMBJ16A-E3/52 when PCB layout permits larger footprint and thermal management requires >400 W capability; SMAJ16A-E3/61 optimizes space-constrained automotive modules. |
Compared with SMAJ16CA-E3/61, the SMAJ16A-E3/61 provides polarity-specific clamping essential for grounded DC systems; versus SMBJ16A-E3/52, it trades 200 W pulse power and thermal margin for 30% smaller board area - making it optimal for compact, cost-sensitive 12 V automotive and industrial edge nodes.
Availability
SMAJ16A-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC digital inputs, and DC power rail conditioning requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for SMAJ16A-E3/61 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 efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-speed transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where sub-ns response, AEC-Q101 readiness, and stable clamping under thermal stress are mandatory.
FAQ
What is the breakdown voltage range for SMAJ16A-E3/61?
The SMAJ16A-E3/61 has a guaranteed breakdown voltage (VBR) range of 17.8 V to 19.7 V at 1 mA test current, measured per ANSI/IEEE C62.35. This window ensures predictable avalanche initiation across temperature and process variation, directly supporting its 16 V stand-off rating and 26.0 V clamping performance. The SMAJ16A-E3/61 maintains this specification under JEDEC-standard thermal conditions.
Is SMAJ16A-E3/61 suitable for automotive applications?
Yes - the base SMAJ16A-E3/61 is RoHS-compliant and qualified for commercial use; however, the AEC-Q101-qualified version is designated SMAJ16AHE3_X (e.g., SMAJ16AHE3_A). While SMAJ16A-E3/61 shares identical electrical and thermal specs, only the HE3-suffixed variant is certified for automotive underhood and module-level stress testing. For non-certified automotive subsystems, SMAJ16A-E3/61 remains widely deployed with proven field reliability.
What is the maximum clamping voltage of SMAJ16A-E3/61 and at what current?
The SMAJ16A-E3/61 exhibits a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current (IPPM) of 15.4 A under the standardized 10/1000 μs double-exponential waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 30 V-tolerant interface ICs.
Does SMAJ16A-E3/61 have polarity markings, and how is it oriented in circuit?
Yes - SMAJ16A-E3/61 is unidirectional and marked with a cathode band on the SMA package body. During PCB layout, the banded end must connect to the line being protected (e.g., VCC, signal line), while the unbanded (anode) end connects to ground or the lower-potential reference. Reversing orientation renders the device ineffective for overvoltage suppression, as forward conduction would occur prematurely under normal bias.
What is the thermal resistance and power derating behavior of SMAJ16A-E3/61?
The SMAJ16A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard 0.2" × 0.2" copper pads. Its 3.3 W steady-state power dissipation (PD) derates linearly above 25 °C ambient, reaching zero at +150 °C junction temperature. Full 400 W pulse capability is maintained only at TA ≤ 25 °C; above that, pulse power must be reduced per Figure 2 in Vishay document 88390 to avoid thermal runaway.
SMAJ16A-E3/61 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ16A-E3/61 FAQ
1.How can I place an order for SMAJ16A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16A-E3/61 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 SMAJ16A-E3/61 reliable?
The price and inventory of SMAJ16A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ16A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16A-E3/61?
SMAJ16A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16A-E3/61 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 SMAJ16A-E3/61?
For technical support, including SMAJ16A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16A-E3/61 requirements.
6.How does Aetrix verify that SMAJ16A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ16A-E3/61 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 SMAJ16A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ16A-E3/61?
All SMAJ16A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16A-E3/61, 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 SMAJ16A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ16A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ16A-E3/61 Tags
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