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Vishay General Semiconductor - Diodes Division SMAJ10A-M3/5A
- Part No.:
- SMAJ10A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10A-M3/5A.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ10A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA test current, and clamps up to 17.0 V at 23.5 A peak pulse current (IPPM) under 10/1000 μs waveform.
For engineers reviewing the SMAJ10A-M3/5A datasheet, SMAJ10A-M3/5A pinout, SMAJ10A-M3/5A application, or SMAJ10A-M3/5A equivalent, this device is selected for robust overvoltage protection on DC power rails, I/O lines, and sensor interfaces where fast response (<1 ps), low clamping ratio (1.7×VWM), and 400 W peak pulse power capability are required.
Technical Context
The SMAJ10A-M3/5A operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for clamping transient energy before it damages downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while its MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power (10/1000 μs) at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and maintains ≤1.0 μA reverse leakage at VWM = 10 V. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, enabling reliable operation in ambient temperatures up to +125 °C with appropriate layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 11.1 V / 12.3 V at IT = 1 mA - Confirmed avalanche breakdown range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 17.0 V at 23.5 A - Clamping voltage under 10/1000 μs surge; limits stress on protected 12 V logic or analog circuitry. |
| PPPM | 400 W - Peak pulse power handling capacity; sufficient for automotive load-dump and industrial switching transients. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current events without failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, RoHS-compliant and halogen-free (M3 suffix). Cathode indicated by band marking on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., VIN or signal); conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients common in automotive 12 V systems and industrial motor drives without degradation. |
| Low clamping voltage (17.0 V @ 23.5 A) | Minimizes voltage overshoot on protected 12 V rails, preserving margin for downstream 15 V tolerant components. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress and thermal cycling. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special handling requirements. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance mandates for global OEMs and industrial equipment manufacturers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control units (ECUs) and body control modules (BCMs) from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBAT and ground, clamping transients within nanoseconds. Use Value: Limits voltage to ≤17.0 V during 400 W surges, preventing latch-up or gate oxide damage in MCU power regulators and CAN transceivers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA or 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Transient suppressor mounted at connector entry point, shunting ESD and inductive kickback to chassis ground. Use Value: Maintains signal integrity by clamping <100 ns transients to <17.0 V, avoiding ADC saturation or op-amp input stage damage. |
| Consumer Device USB Port Protection | Telecom Equipment DC Input Protection |
|
Use Scenario: Safeguarding VBUS (5 V) and D+/D− lines in USB-C host ports against ESD and hot-plug spikes. IC Role / Device Role / Timing Role: Discrete TVS array element (used per-line), leveraging fast response and low capacitance (<100 pF). Use Value: Provides sub-1 ns response and <1.0 μA leakage at 5 V, ensuring no impact on USB 2.0 signal integrity or enumeration timing. |
Use Scenario: Guarding -48 V DC input of telecom base station power supplies against lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection circuit, absorbing initial surge energy before MOV/GDT stages. Use Value: Delivers 400 W pulse handling at elevated VWM (10 V), enabling cascaded design with higher-voltage secondary suppressors for full-system immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Preferred for commercial-grade designs where halogen content is unrestricted. | Select SMAJ10A-E3/5A when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not needed. |
| SMAJ10CA-M3/5A | Bidirectional variant; symmetric VBR (11.1–12.3 V) in both directions; same VC, PPPM, and package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs. | Choose SMAJ10CA-M3/5A only when protecting bidirectional signals; SMAJ10A-M3/5A is optimal for DC rails with defined polarity. |
Compared with SMAJ10A-E3/5A, the M3 suffix adds halogen-free compliance without performance trade-offs; versus SMAJ10CA-M3/5A, the unidirectional configuration provides tighter leakage control and avoids unnecessary bidirectional conduction in DC applications.
Availability
SMAJ10A-M3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power delivery systems, and telecom DC input stages requiring stable component supply and halogen-free compliance.
Supply support for SMAJ10A-M3/5A 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, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMAJ series was developed for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding AEC-Q101 readiness and robust surge immunity.
FAQ
What is the maximum clamping voltage of the SMAJ10A-M3/5A under surge conditions?
The SMAJ10A-M3/5A clamps to a maximum of 17.0 V when subjected to its rated peak pulse current of 23.5 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with specified PCB pad layout (0.2" × 0.2" copper), and remains valid across its operational temperature range when derated per Figure 2 in the Vishay datasheet 88390. The SMAJ10A-M3/5A achieves this with minimal voltage overshoot relative to its 10 V stand-off rating.
Is the SMAJ10A-M3/5A suitable for automotive applications?
Yes - the SMAJ10A-M3/5A is halogen-free and RoHS-compliant (M3 suffix), and an AEC-Q101 qualified version is available under ordering code SMAJ10A-HM3_X. While the base SMAJ10A-M3/5A itself is commercial-grade, its 150 °C junction rating, 40 A surge current capability, and robust construction make it widely deployed in non-safety-critical automotive subsystems such as infotainment power rails and body electronics. For certified applications, specify the HM3 variant.
How does the SMAJ10A-M3/5A differ from the SMAJ10CA-M3/5A?
The SMAJ10A-M3/5A is unidirectional, with cathode marked and designed for DC line protection where polarity is fixed; the SMAJ10CA-M3/5A is bidirectional, with no polarity marking and symmetric breakdown in both directions. Both share identical VBR, VC, PPPM, and package, but the unidirectional SMAJ10A-M3/5A exhibits lower reverse leakage (<1.0 μA at 10 V) than the bidirectional version, making it preferable for DC power rail applications.
What is the thermal resistance of the SMAJ10A-M3/5A, and how does it affect layout?
The SMAJ10A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes no additional heatsinking; increasing copper area or adding thermal vias reduces RθJA and improves power handling. For continuous 3.3 W dissipation, board layout must ensure adequate copper to maintain TJ ≤ 150 °C at worst-case ambient.
Does the SMAJ10A-M3/5A require derating at elevated ambient temperatures?
Yes - the SMAJ10A-M3/5A's peak pulse power rating decreases linearly above 25 °C ambient, per Figure 2 in datasheet 88390. At 85 °C ambient, its 400 W rating drops to approximately 240 W; at 125 °C, it falls to ~120 W. Engineers must apply this derating when designing for under-hood or enclosed industrial environments, and verify clamping performance using worst-case IPPM and VC values at elevated TA. The SMAJ10A-M3/5A remains functional up to TJ = 150 °C.
SMAJ10A-M3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10A-M3/5A FAQ
1.How can I place an order for SMAJ10A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10A-M3/5A 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 SMAJ10A-M3/5A reliable?
The price and inventory of SMAJ10A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10A-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ10A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10A-M3/5A?
SMAJ10A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10A-M3/5A 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 SMAJ10A-M3/5A?
For technical support, including SMAJ10A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10A-M3/5A requirements.
6.How does Aetrix verify that SMAJ10A-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ10A-M3/5A 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 SMAJ10A-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ10A-M3/5A?
All SMAJ10A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10A-M3/5A, 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 SMAJ10A-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ10A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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