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Diodes Incorporated SMAJ150A-13-F
- Part No.:
- SMAJ150A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150A-13-F.pdf
- Description:
- TVS DIODE 150VWM 243VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:8,817
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Product details
Overview
SMAJ150A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 150V reverse standoff voltage (VRWM), 167–185V breakdown range (VBR), 243V max clamping voltage (VC) at 1.6A peak pulse current (IPP), and operates from –55°C to +150°C - deployed in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the SMAJ150A-13-F datasheet, SMAJ150A-13-F pinout, SMAJ150A-13-F application, or SMAJ150A-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM ≈ 1.62), unidirectional polarity, SMA package thermal limits, and compliance with IEC 61000-4-2 Level 4 ESD immunity requirements.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response (<1 ns) to transients while maintaining low leakage (<5 µA at VRWM). Its unidirectional configuration enables asymmetric clamping - conducting only during reverse overvoltage events - making it suitable for protecting grounded-side inputs in 12V/24V automotive systems.
The device is rated for 400W non-repetitive peak pulse power (8.3 ms half-sine wave), derates linearly above +25°C ambient, and supports steady-state dissipation up to 1.0W at lead temperature TL = +75°C. Its SMA package provides mechanical robustness and UL 94V-0 flammability rating for high-reliability PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 8.3 ms surge without failure under defined test conditions |
| Reverse Standoff Voltage | 150 V - maximum continuous DC or RMS voltage before clamping initiates |
| Breakdown Voltage Range | 167–185 V - guaranteed conduction onset window at 1.0 mA test current |
| Max Clamping Voltage | 243 V at 1.6 A IPP - upper limit of voltage seen by protected circuit during surge |
| Leakage Current | <5 µA @ 150 V - minimal standby power loss and signal integrity impact |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive and industrial environments |
| Package | SMA - surface-mount outline with cathode band marking, JEDEC-standard footprint |
Pinout & Package
Two-terminal SMA package: anode and cathode terminals aligned along the long axis; cathode identified by a visible band on the top surface. Designed for reflow soldering per J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected line side (e.g., +12V rail); conducts only during fault-induced reverse bias |
| Cathode | Current exit during clamping | Connected to ground or reference plane; defines unidirectional clamping polarity via cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 12V automotive systems |
| Glass Passivated Die | Improves humidity resistance and long-term reliability vs. epoxy-passivated alternatives |
| UL 94V-0 Molded Case | Meets flame-retardancy requirements for enclosed industrial and automotive enclosures |
| Lead-Free & Halogen-Free | Complies with RoHS 3 and automotive "Green" standards (Br+Cl <1500 ppm, Sb <1000 ppm) |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protects 12V supply input of BCM microcontroller from load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between fuse output and LDO input, responding within <1 ns to transients. Use Value: Limits voltage to ≤243 V during 100 V/50 ms load dump event, preventing LDO overvoltage shutdown. | Use Scenario: Shields 4–20 mA current loop receiver from field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals, referenced to system ground. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to safe levels without degrading 16-bit ADC accuracy. |
| Telecom Remote Radio Unit (RRU) Power Interface | Medical Patient Monitor Sensor Port |
Use Scenario: Guards +48 V DC power input of outdoor RRU against lightning-induced surges on PoE-like feeds. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converter, sized for 400W pulse handling. Use Value: Absorbs 10/1000 µs surge energy without degradation, preserving downstream converter reliability. | Use Scenario: Secures isolated analog front-end of ECG/SpO₂ sensor interface against defibrillator discharge coupling. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) unidirectional clamp on patient-connected signal path. Use Value: Maintains biocompatibility isolation integrity while limiting transient voltage to <250 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150AHE3_A/H | Same electrical specs; AEC-Q101 qualified, PPAP-capable, manufactured in IATF 16949 facility | Required for automotive production programs needing change control and qualification documentation | Select when automotive OEM compliance (not just automotive-grade use) is mandatory |
| P6SMB150A | Same VRWM/VC/IPP; larger SMB package (higher thermal mass, lower board density) | Better thermal performance in high-ambient or high-duty-cycle surge environments | Choose when board layout allows SMB footprint and enhanced power derating is needed |
Compared with SMAJ150AHE3_A/H, this part lacks AEC-Q101 certification but offers identical electrical performance and cost advantage for non-OEM industrial designs; versus P6SMB150A, it trades thermal margin for space savings in compact layouts.
Availability
SMAJ150A-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom remote radio units, and medical sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMAJ150A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes - engineered specifically for high-power transient suppression in space-constrained, high-reliability applications including automotive, industrial, and communications infrastructure.
FAQ
What is the polarity configuration of SMAJ150A-13-F?
SMAJ150A-13-F is a unidirectional TVS diode, indicated by the absence of the "C" suffix. It conducts only when the cathode is biased positive relative to the anode - ideal for protecting grounded-side circuits. Polarity is marked by a visible cathode band on the top surface of the SMA package.
Does SMAJ150A-13-F meet automotive qualification standards?
No - SMAJ150A-13-F is the standard industrial version. For automotive applications, Diodes offers the AEC-Q101-qualified SMAJ150AQ series (e.g., SMAJ150AQ-13-F), which undergoes additional stress testing, PPAP documentation, and is produced in IATF 16949-certified facilities.
How does the clamping voltage relate to system-level surge protection?
The 243 V max clamping voltage (VC) at 1.6 A IPP defines the worst-case voltage imposed on downstream components during a transient. To ensure protection, VC must remain below the absolute maximum rating of the protected IC - e.g., if an LDO has 28 V abs max, SMAJ150A-13-F is unsuitable; it is intended for 200+ V tolerant stages like input filters or MOSFET gates.
Can SMAJ150A-13-F be used in bidirectional signal lines?
No - its unidirectional structure blocks conduction in one direction only. For AC or bidirectional data lines (e.g., RS-485, CAN), a bidirectional variant such as SMAJ150CA-13-F is required, which clamps symmetrically above and below ground without polarity dependence.
SMAJ150A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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:
- SMA
SMAJ150A-13-F FAQ
1.How can I place an order for SMAJ150A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150A-13-F 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 SMAJ150A-13-F reliable?
The price and inventory of SMAJ150A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ150A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150A-13-F?
SMAJ150A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150A-13-F 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 SMAJ150A-13-F?
For technical support, including SMAJ150A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150A-13-F requirements.
6.How does Aetrix verify that SMAJ150A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ150A-13-F 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 SMAJ150A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ150A-13-F?
All SMAJ150A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150A-13-F, 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 SMAJ150A-13-F part is unused and in its original packaging.
Return procedure for SMAJ150A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150A-13-F Tags
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