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Vishay General Semiconductor - Diodes Division SMAJ160AHE3/61
- Part No.:
- SMAJ160AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ160AHE3/61.pdf
- Description:
- TVS DIODE 160VWM 259VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,998
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Product details
Overview
SMAJ160AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 160 V stand-off voltage (VWM), 178–197 V breakdown voltage (VBR) at 1 mA, 259 V maximum clamping voltage (VC) at 1.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor interfaces in automotive power systems.
For engineers reviewing the SMAJ160AHE3/61 datasheet, SMAJ160AHE3/61 pinout, SMAJ160AHE3/61 application, or SMAJ160AHE3/61 equivalent, key selection criteria include unidirectional polarity, 160 V stand-off rating, AEC-Q101 qualification, SMA package thermal resistance (RθJA = 120 °C/W), and compliance with UL 497B for surge protection.
Technical Context
This TVS diode operates as a voltage-clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR = 178–197 V), limiting transient energy to safe levels for downstream components. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 400 W peak pulse power (10/1000 μs) up to 78 V and derates to 300 W above 78 V; SMAJ160AHE3/61 falls in the latter category. It supports 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and operates across -55 °C to +150 °C junction temperature range, with MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 160 V - Maximum continuous reverse operating voltage before clamping begins; defines circuit's normal operating margin. |
| VBR (min/max) | 178 V / 197 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 259 V at IPPM = 1.2 A - Clamping voltage under standardized 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 300 W - Peak pulse power rating above 78 V; defines transient energy absorption capacity for repetitive surge conditions. |
| ID @ VWM | 1.0 μA - Reverse leakage at 160 V; negligible current draw in normal operation, minimizing standby power loss. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with high ambient thermal loads. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
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 band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage event. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - enables direct use in engine control, body electronics, and ADAS modules. |
| 400 W / 300 W peak pulse power | Supports robust surge immunity per ISO 7637-2 and IEC 61000-4-5; 300 W rating applies at SMAJ160AHE3/61's 160 V VWM level. |
| Low RθJA = 120 °C/W | Enables thermal management on standard PCB copper pads (0.2" × 0.2"); limits self-heating during repeated transient events. |
| UL 497B recognition (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and industrial surge protectors - simplifies system-level safety certification. |
| MSL Level 1, 260 °C reflow | Compatible with standard lead-free SMT assembly processes without preconditioning or special handling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between power rail and ground, absorbing >300 W surges within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS placed at connector entry point, shunting transients before signal conditioning circuitry. Use Value: Maintains signal integrity below 160 V working voltage while clamping to ≤259 V, preserving ADC input range and accuracy. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input side of PD controller, coordinated with secondary GDT or MOV. Use Value: UL 497B recognition supports system-level UL 60950-1/UL 62368-1 compliance; 259 V VC ensures downstream regulator remains within SOA. |
Use Scenario: Adding secondary-level overvoltage protection on AC-DC adapter DC output rails. IC Role / Device Role / Timing Role: Standoff-rated clamping device placed after primary regulation, guarding against internal fault-induced overvoltage. Use Value: 160 V VWM aligns with 12–48 V adapter outputs; 1.0 μA leakage avoids efficiency penalty in always-on standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160A-E3/61 | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMA package. | Restricted to non-automotive industrial or consumer applications where automotive reliability validation is not required. | Select when cost sensitivity outweighs automotive qualification needs and thermal/environmental stress is moderate. |
| SMLJ160AHE3/61 | Higher 1500 W peak pulse power (same 10/1000 μs waveform); larger SMC (DO-214AB) package; same VWM/VBR/VC ratings. | Used where higher surge energy handling is needed (e.g., heavy-duty industrial motor drives), but requires PCB layout change due to larger footprint. | Choose when system-level surge tests exceed 300 W capability and board space allows SMC package integration. |
Compared with SMAJ160A-E3/61, SMAJ160AHE3/61 adds automotive qualification without electrical trade-offs; versus SMLJ160AHE3/61, it trades surge capacity for compactness and cost-making it optimal for space-constrained AEC-Q101-compliant designs needing 300 W protection.
Availability
SMAJ160AHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance, RoHS compliance, and traceable sourcing.
Supply support for SMAJ160AHE3/61 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, efficiency, and application-specific performance.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior and long-term stability are critical.
FAQ
What is the clamping voltage of SMAJ160AHE3/61 under standard surge conditions?
The SMAJ160AHE3/61 has a maximum clamping voltage (VC) of 259 V when subjected to its rated peak pulse current (IPPM = 1.2 A) using the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees the protected circuit will not experience reverse voltage exceeding 259 V during defined transient events. The clamping performance is validated across the full operating temperature range and forms the basis for system-level surge margin calculations in designs using SMAJ160AHE3/61.
Is SMAJ160AHE3/61 suitable for automotive applications?
Yes, SMAJ160AHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev H. Its -55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and UL 497B recognition make SMAJ160AHE3/61 appropriate for engine control units, body control modules, and ADAS power domains.
How does the leakage current of SMAJ160AHE3/61 affect low-power circuits?
SMAJ160AHE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 160 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal impact on battery-powered or energy-harvesting systems - for example, adding less than 0.1 mW of standby dissipation at 100 V bias. Leakage remains well below 5 μA across the full -55 °C to +125 °C ambient range, preserving signal integrity and power budget in precision sensor front-ends using SMAJ160AHE3/61.
What is the thermal resistance of SMAJ160AHE3/61, and how does it influence PCB layout?
SMAJ160AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction with no internal planes. To maintain safe junction temperatures during repetitive surges, designers should allocate adequate copper area and avoid routing heat-sensitive components nearby. The low RθJL (30 °C/W) indicates efficient heat transfer to leads, supporting reliability in thermally dense layouts using SMAJ160AHE3/61.
Can SMAJ160AHE3/61 be used in bidirectional configurations?
No, SMAJ160AHE3/61 is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMAJ160CA). Attempting to use SMAJ160AHE3/61 in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to suppress. For symmetrical surge protection, select SMAJ160CAHE3/61 - which shares the same AEC-Q101 qualification and package but provides equal clamping in both polarities.
SMAJ160AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 300W
- 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)
SMAJ160AHE3/61 FAQ
1.How can I place an order for SMAJ160AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ160AHE3/61 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 SMAJ160AHE3/61 reliable?
The price and inventory of SMAJ160AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ160AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ160AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ160AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ160AHE3/61?
SMAJ160AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ160AHE3/61 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 SMAJ160AHE3/61?
For technical support, including SMAJ160AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ160AHE3/61 requirements.
6.How does Aetrix verify that SMAJ160AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ160AHE3/61 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 SMAJ160AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ160AHE3/61?
All SMAJ160AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ160AHE3/61, 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 SMAJ160AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ160AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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