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Diodes Incorporated SMAJ150CA-13-F
- Part No.:
- SMAJ150CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CA-13-F.pdf
- Description:
- TVS DIODE 150VWM 243VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:32,362
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Product details
Overview
SMAJ150CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for 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. Used in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the SMAJ150CA-13-F datasheet, SMAJ150CA-13-F pinout, SMAJ150CA-13-F application, or SMAJ150CA-13-F equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, unidirectional/bidirectional polarity match, peak pulse current capability under IEC 61000-4-5 surge waveforms, and SMA package thermal derating above +25°C ambient.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal lines without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5 µA at VRWM), critical for low-power sensor nodes.
The device responds within <1 ns to transients and maintains clamping performance under 8.3 ms half-sine surges per JEDEC standards. Thermal resistance (RθJA ≈ 120°C/W) and 1.0 W steady-state dissipation limit continuous power handling but support robust transient energy absorption up to 400W non-repetitive pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Absorbs single high-energy transients (e.g., ISO 7637-2 Pulse 5a) without failure |
| Reverse Standoff Voltage | 150 V - Maximum continuous DC or RMS voltage before clamping initiates |
| Breakdown Voltage Range | 167–185 V - Confirmed VBR at 1.0 mA test current; defines turn-on threshold consistency |
| Max Clamping Voltage | 243 V at IPP = 1.6 A - Limits voltage seen by downstream circuitry during surge events |
| Peak Pulse Current | 1.6 A - Sustains defined clamping level under standardized 8.3/20 µs surge waveform |
| Operating Temperature | –55°C to +150°C - Validated for under-hood automotive and industrial control environments |
| Package | SMA (DO-214AC) - Surface-mount footprint with 2.29–2.92 mm body width and 4.00–4.60 mm length |
Pinout & Package
Two-terminal SMA (DO-214AC) package with cathode band omitted (bidirectional configuration). Terminals are symmetrical; no polarity marking required. Molded plastic case meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals conduct identically during positive or negative overvoltage events |
| Case | Thermal interface | Plastic body transfers heat to PCB copper; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing on 50 Ω source impedance |
| Glass-passivated die | Ensures long-term parameter stability and low leakage drift over temperature and time |
| Bidirectional operation | Protects AC signals, differential buses (e.g., RS-485), or floating DC rails without polarity dependency |
| RoHS-compliant & halogen-free | Meets automotive ELV directive and IPC-1752A material declaration requirements |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protecting 12 V supply input to head unit MCU and audio codec against load dump and alternator ripple. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converter input. Use Value: Clamps transients to ≤243 V, maintaining safe margin below 28 V absolute maximum rating of downstream regulators. |
Use Scenario: Shielding RS-485 transceiver data lines from ESD and induced surges in factory automation cabling. IC Role / Device Role: Bidirectional line protector between transceiver I/O pins and twisted-pair bus. Use Value: Symmetric clamping preserves differential signal integrity while limiting common-mode voltage excursion to <±243 V. |
| Smart Meter AC Mains Interface | Medical Sensor Analog Front-End |
Use Scenario: Safeguarding meter microcontroller power and communication lines connected to 230 VAC mains via isolation barrier. IC Role / Device Role: Secondary-side transient suppressor after isolated DC-DC converter output. Use Value: Withstands repeated 1.2/50 µs surges per IEC 61000-4-5 while maintaining <5 µA leakage at 150 V. |
Use Scenario: Guarding low-noise instrumentation amplifier inputs from ESD events during patient cable handling. IC Role / Device Role: Low-capacitance (<30 pF) TVS placed directly at connector entry point. Use Value: 243 V clamping prevents latch-up in precision op-amps rated for ±18 V supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA from Littelfuse | Identical VRWM (150 V), VC (243 V), and IPP (1.6 A); same SMA package and RoHS compliance | No functional difference; validated for identical IEC 61000-4-2/4-5 test profiles | Drop-in replacement where dual-sourcing or alternate logistics are required |
| P6SMB150CA from Vishay | Same VRWM and VC, but rated for 600W peak power and higher IPP (2.4 A); larger SMB package (4.6 × 3.9 mm) | Higher surge margin suits harsher environments (e.g., railway traction control), but requires PCB layout change | Select when system-level surge testing exceeds 400W or board space allows SMB footprint |
Compared with SMAJ150CA-13-F, Littelfuse's SMAJ150CA offers identical electrical and mechanical specs for seamless second sourcing, while Vishay's P6SMB150CA trades SMA compactness for 50% higher surge capacity-requiring layout revision but enabling higher reliability in extreme transients.
Availability
SMAJ150CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and smart meter AC interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ150CA-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-reliability transient suppression in automotive, industrial, and communications equipment where compact size and AEC-Q200-aligned robustness are essential.
FAQ
Is SMAJ150CA-13-F suitable for automotive applications?
Yes. While the standard SMAJ150CA-13-F is not AEC-Q200 qualified, Diodes offers an automotive-grade variant (SMAJ150CAQ) manufactured in IATF 16949-certified facilities and qualified to AEC-Q200. The -13-F suffix indicates tape-and-reel packaging (5000 units per reel) compatible with SMT assembly lines used in automotive electronics production.
What is the thermal derating behavior above +25°C ambient?
Per Figure 1 in DS19005 Rev. 19, peak pulse power derates linearly from 100% at +25°C to ~50% at +100°C ambient. At +75°C, it retains ~80% of 400W rating. Steady-state power dissipation drops from 1.0 W at +75°C lead temperature to zero at +150°C, as shown in Figure 6.
How does bidirectional operation affect PCB layout versus unidirectional TVS?
Bidirectional devices like SMAJ150CA-13-F have no cathode band and are electrically symmetrical-no orientation requirement during placement. This simplifies layout, eliminates polarity verification steps in AOI, and enables use on AC-coupled or floating nodes where voltage polarity reverses, unlike unidirectional TVS that must be oriented correctly relative to ground.
Can this TVS be used in parallel to increase surge current handling?
No. Due to parametric variation in breakdown voltage (167–185 V), paralleling multiple SMAJ150CA-13-F units causes uneven current sharing-lower-VBR units conduct first and may fail prematurely. For higher IPP, select a single higher-rated device (e.g., P6SMB150CA) or verify matched-bin parts with <1% VBR spread under controlled conditions.
SMAJ150CA-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ150CA-13-F FAQ
1.How can I place an order for SMAJ150CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CA-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 SMAJ150CA-13-F reliable?
The price and inventory of SMAJ150CA-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 SMAJ150CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ150CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CA-13-F?
SMAJ150CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CA-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 SMAJ150CA-13-F?
For technical support, including SMAJ150CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CA-13-F requirements.
6.How does Aetrix verify that SMAJ150CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ150CA-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 SMAJ150CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ150CA-13-F?
All SMAJ150CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CA-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 SMAJ150CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ150CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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