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Vishay General Semiconductor - Diodes Division SMAJ8.0A-M3/61
- Part No.:
- SMAJ8.0A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0A-M3/61.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,693
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Product details
Overview
SMAJ8.0A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on DC power rails and signal lines. It features a 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 1 mA, 13.6 V maximum clamping voltage (VC) at 29.4 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive infotainment power supplies to safeguard microcontrollers against load-dump transients.
For engineers reviewing the SMAJ8.0A-M3/61 datasheet, SMAJ8.0A-M3/61 pinout, SMAJ8.0A-M3/61 application, or SMAJ8.0A-M3/61 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 120 °C/W) under PCB pad constraints, unidirectional polarity marking, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents <1 μA leakage at 8.0 V; when transient exceeds VBR (~9.3 V typical), it avalanches rapidly (<1 ns response) to clamp the line at ≤13.6 V while diverting up to 29.4 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, the device uses SMA (DO-214AC) package with matte tin-plated leads compliant to J-STD-002 solderability and JESD201 Class 2 whisker resistance - enabling high-reliability automated placement in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 8.89 V / 9.83 V at 1 mA - guaranteed avalanche initiation range for reliable triggering |
| VC @ IPPM | 13.6 V at 29.4 A - clamped voltage during 10/1000 μs surge, defining protection window for downstream ICs |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform, derated above 25 °C |
| ID @ VWM | 50 μA max - low leakage preserves battery life and signal integrity in always-on circuits |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on recommended 5.0 mm × 5.0 mm copper pads |
| Polarity | Unidirectional - cathode marked by band; blocks forward current beyond VF ≈ 3.5 V at 25 A |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant (M3 suffix), with cathode indicated by molded band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; carries full surge current during clamping |
| Cathode | High-side connection point | Marked by band; connected to protected line (e.g., 12 V rail); defines unidirectional blocking direction |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| 13.6 V clamping voltage | Provides ≥1.4 V margin below typical 15 V absolute maximum rating of MCU power pins |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning |
| Halogen-free (M3) | Meets IEC 61249-2-21 and JEDEC J-STD-020 for environmentally constrained applications |
| Fast response time | <1 ns turn-on ensures clamping before sensitive logic or analog circuitry sustains damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed infotainment head unit exposed to load-dump events up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input fuse and DC-DC converter input. Use Value: Clamps transients to ≤13.6 V within nanoseconds, preventing latch-up or gate oxide rupture in upstream PMICs. | Use Scenario: 24 V industrial PLC analog input module receiving signals from remote 4–20 mA sensors. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to suppress ESD and inductive switching noise. Use Value: Limits induced surges to safe levels before they reach precision op-amps and ADC front-ends, preserving measurement accuracy. |
| Consumer USB Power Delivery Protection | Telecom Base Station DC Feeder Protection |
Use Scenario: USB-C PD port in portable monitor subjected to hot-plug voltage overshoot and cable discharge events. IC Role / Device Role / Timing Role: TVS placed on VBUS line upstream of USB PD controller and buck converter. Use Value: Absorbs 400 W pulses without degradation, maintaining VBUS regulation and preventing controller reset or damage. | Use Scenario: -48 V DC feeder line in outdoor telecom cabinet vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: TVS array element protecting DC-DC converters powering RF amplifiers. Use Value: Withstands repetitive 10/1000 μs surges up to 29.4 A while maintaining stable clamping performance over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free; commercial grade only | Lacks halogen-free certification required for some EU industrial and automotive programs | Select when halogen content is unrestricted and cost sensitivity outweighs environmental compliance requirements |
| SMAJ8.0AHE3_A/H | AEC-Q101 qualified; identical VWM/VBR/VC; same SMA package; higher reliability screening | Required for automotive ECUs where qualification to AEC-Q101 is mandatory | Choose for safety-critical automotive modules needing certified component traceability and stress testing |
Compared with SMAJ8.0A-M3/61, the E3 variant offers lower cost but no halogen-free assurance, while the HE3 variant adds AEC-Q101 qualification at higher unit cost - making SMAJ8.0A-M3/61 the optimal balance of environmental compliance, performance, and commercial-grade reliability for non-automotive industrial and telecom use.
Availability
SMAJ8.0A-M3/61 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and telecom DC power feeders requiring stable component supply with halogen-free compliance and 400 W surge immunity.
Supply support for SMAJ8.0A-M3/61 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 high-reliability, high-efficiency solutions.
The SMAJ series targets board-level transient suppression in harsh environments - engineered for fast clamping, repeatable surge endurance, and compatibility with automated SMT processes across automotive, industrial, and communications markets.
FAQ
What is the maximum clamping voltage of SMAJ8.0A-M3/61 under a 10/1000 μs surge?
The SMAJ8.0A-M3/61 has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current of 29.4 A with a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees protection margin for 15 V-tolerant ICs. The clamping performance remains stable across its operating temperature range of –55 °C to +150 °C.
Does SMAJ8.0A-M3/61 meet automotive qualification standards?
No, SMAJ8.0A-M3/61 is a commercial-grade, halogen-free, RoHS-compliant part and is not AEC-Q101 qualified. For automotive applications requiring qualification, the functionally identical SMAJ8.0AHE3_A/H or SMAJ8.0AHM3_A/H variants are available - both undergo full AEC-Q101 stress testing and carry automotive-specific traceability codes.
What does the "M3" suffix indicate in SMAJ8.0A-M3/61?
The "M3" suffix in SMAJ8.0A-M3/61 denotes halogen-free, RoHS-compliant construction meeting IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 requirements. It distinguishes this variant from the E3 (RoHS only) and HE3/HM3 (AEC-Q101 qualified) versions - confirming suitability for environmentally regulated industrial and consumer applications.
Can SMAJ8.0A-M3/61 be used in bidirectional signal line protection?
No, SMAJ8.0A-M3/61 is unidirectional and must be used with correct polarity - cathode connected to the protected line, anode to ground. For bidirectional protection (e.g., RS-485, CAN bus), the SMAJ8.0CA family member is required. Using SMAJ8.0A-M3/61 on AC or floating lines risks forward conduction and failure to suppress negative transients.
What is the thermal resistance and recommended PCB layout for SMAJ8.0A-M3/61?
SMAJ8.0A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain reliability under repetitive surges, ensure adequate copper area and avoid thermal isolation - the device's RθJL is 30 °C/W to lead, supporting heat transfer through solder joints into internal planes.
SMAJ8.0A-M3/61 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- 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)
SMAJ8.0A-M3/61 FAQ
1.How can I place an order for SMAJ8.0A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0A-M3/61 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 SMAJ8.0A-M3/61 reliable?
The price and inventory of SMAJ8.0A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0A-M3/61?
SMAJ8.0A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0A-M3/61 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 SMAJ8.0A-M3/61?
For technical support, including SMAJ8.0A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0A-M3/61 requirements.
6.How does Aetrix verify that SMAJ8.0A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0A-M3/61 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 SMAJ8.0A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0A-M3/61?
All SMAJ8.0A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0A-M3/61, 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 SMAJ8.0A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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