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Vishay General Semiconductor - Diodes Division SMAJ150C-E3/5A
- Part No.:
- SMAJ150C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150C-E3/5A.pdf
- Description:
- TVS DIODE 150VWM 268VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,009
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Product details
Overview
SMAJ150C-E3/5A from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 150 V stand-off voltage (VWM), 268 V maximum clamping voltage (VC) at 1.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive sensor interfaces and industrial I/O lines against ESD and lightning-induced surges.
For engineers reviewing the SMAJ150C-E3/5A datasheet, SMAJ150C-E3/5A pinout, SMAJ150C-E3/5A application, or SMAJ150C-E3/5A equivalent, key selection criteria include bi-directional surge capability, low leakage (<1 µA at VWM), RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 167 V and 204 V at 1 mA test current. Its clamping performance is characterized under standardized 10/1000 µs surge conditions, delivering 268 V max VC at 1.1 A IPPM while maintaining <1 µA reverse leakage at 150 V VWM.
Thermal design relies on RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), requiring minimum 0.2 × 0.2 inch copper pads per terminal for rated 400 W pulse handling. The device meets J-STD-020 MSL Level 1 and withstands solder reflow up to 260 °C for 40 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 125–150 V nominal systems. |
| VC @ IPPM | 268 V - Clamped voltage at 1.1 A peak pulse current; ensures downstream ICs see ≤268 V during transient events. |
| PPPM | 400 W - Peak pulse power dissipation with 10/1000 µs waveform; validated on 5.0 × 5.0 mm Cu pads, derated above 25 °C. |
| IPPM | 1.1 A - Peak pulse current corresponding to VC; used to size upstream fusing and verify PCB trace current capacity. |
| ID @ VWM | <1 µA - Reverse leakage at 150 V; negligible power loss and signal integrity impact in high-impedance monitoring circuits. |
| TJ Range | −55 °C to +150 °C - Full operational junction temperature range; supports under-hood automotive and industrial ambient environments. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band omitted (bi-directional); compatible with JEDEC MS-013. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, 0.208" × 0.157" body, 0.074" lead spacing, and no polarity marking (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | Either terminal serves as input/output; no DC polarity dependency - enables single-component protection of AC-coupled or floating lines. |
| Case (exposed pad not present) | Thermal and mechanical anchor | No thermal pad; heat dissipation relies entirely on soldered leads and PCB copper area per manufacturer layout recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signal lines, differential buses (e.g., RS-485), and ungrounded power rails without polarity concerns. |
| 400 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges when mounted per recommended 5.0 × 5.0 mm pad layout. |
| MSL Level 1 compliance | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-sensitive handling controls. |
| RoHS-compliant terminations | Matte tin plating meets J-STD-002 solderability and JESD22-B102 wetting requirements; E3 suffix passes JESD201 Class 1A whisker test. |
| Low leakage & tight VBR | <1 µA @ 150 V and 167–204 V VBR range ensure minimal standby current and predictable turn-on across production lots. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp transients before reaching precision ADC front-end. Use Value: 268 V clamping limits stress on 3.3 V or 5 V signal conditioning circuitry; 150 V VWM avoids false triggering during 12 V/24 V supply fluctuations. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subjected to ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Paired across A/B differential pair to suppress common-mode transients without distorting signal integrity. Use Value: Symmetrical clamping preserves differential voltage swing; sub-1 µA leakage prevents bias current errors in high-impedance termination networks. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface components from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage protector ahead of gas discharge tube (GDT) or polymer PTC, absorbing fast-rising energy before slower devices activate. Use Value: 10/1000 µs response ensures clamping within nanoseconds; 400 W rating handles multi-kV induced surges without degradation. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kickback during PWM switching and relay de-energization. Use Value: 150 V VWM accommodates 120 VAC rectified peaks; bi-directional operation handles reverse EMF regardless of drive polarity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA-E3/5A | Same electrical specs and DO-214AC package; CA suffix denotes identical bi-directional construction per Vishay nomenclature. | No functional difference; CA and C suffixes are interchangeable per Vishay documentation for this family. | Select SMAJ150CA-E3/5A only if legacy BOMs or distributor stock use CA designation - electrically and mechanically identical to SMAJ150C-E3/5A. |
| SMCJ150CA | Higher 1500 W peak power rating in larger DO-214AB (SMB) package; VC = 243 V @ 6.5 A, VWM = 150 V. | Suitable for higher-energy threats (e.g., IEC 61000-4-5 Level 5), but requires larger PCB footprint and different pad layout. | Choose SMCJ150CA only when system-level surge testing exceeds 400 W capability; not a drop-in replacement due to package and thermal interface differences. |
Compared with SMAJ150C-E3/5A, SMAJ150CA-E3/5A offers identical protection performance in the same footprint, while SMCJ150CA provides higher surge capacity at the cost of board space and layout redesign - making SMAJ150C-E3/5A optimal for space-constrained 400 W-class protection.
Availability
SMAJ150C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line card protection requiring stable component supply across extended production cycles.
Supply support for SMAJ150C-E3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and AEC-Q qualified automotive solutions.
The SMAJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, bi-directional symmetry, and repeatable clamping are critical.
FAQ
What is the clamping voltage of the SMAJ150C-E3/5A under standard surge conditions?
The SMAJ150C-E3/5A exhibits a maximum clamping voltage (VC) of 268 V when subjected to its rated peak pulse current of 1.1 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C on the recommended 5.0 × 5.0 mm copper pad layout and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMAJ150C-E3/5A suitable for automotive applications?
Yes, SMAJ150C-E3/5A is appropriate for automotive applications including sensor interface protection and infotainment system I/O lines. While the base E3 grade is commercial, its −55 °C to +150 °C operating range, AEC-Q101-qualified variants (e.g., SMAJ150CHE3), and robust surge handling meet core automotive environmental and reliability requirements.
How does the bi-directional nature of SMAJ150C-E3/5A affect its placement on a PCB?
The bi-directional design of SMAJ150C-E3/5A eliminates polarity constraints - either terminal may connect to line or return without performance impact. This simplifies layout for AC-coupled signals, differential buses, or floating grounds, and removes risk of incorrect orientation during automated placement or manual assembly.
What is the maximum reverse leakage current for SMAJ150C-E3/5A at its rated stand-off voltage?
At its 150 V stand-off voltage (VWM) and TA = 25 °C, the SMAJ150C-E3/5A guarantees a maximum reverse leakage current (ID) of 1 µA. This ultra-low leakage ensures minimal power loss and avoids interference in high-impedance sensing paths or battery-powered systems.
Does SMAJ150C-E3/5A require special handling for moisture sensitivity?
No - SMAJ150C-E3/5A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. Its moisture resistance supports standard SMT processes with peak reflow temperatures up to 260 °C for 40 seconds.
SMAJ150C-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 268V
- Current - Peak Pulse (10/1000µs):
- 1.1A
- Power - Peak Pulse:
- 300W
- 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)
SMAJ150C-E3/5A FAQ
1.How can I place an order for SMAJ150C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150C-E3/5A 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 SMAJ150C-E3/5A reliable?
The price and inventory of SMAJ150C-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ150C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150C-E3/5A?
SMAJ150C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150C-E3/5A 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 SMAJ150C-E3/5A?
For technical support, including SMAJ150C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150C-E3/5A requirements.
6.How does Aetrix verify that SMAJ150C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ150C-E3/5A 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 SMAJ150C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ150C-E3/5A?
All SMAJ150C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150C-E3/5A, 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 SMAJ150C-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ150C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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