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Diodes Incorporated SMAJ150CA-13
- Part No.:
- SMAJ150CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CA-13.pdf
- Description:
- TVS DIODE 150VWM 243VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,736
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Product details
Overview
SMAJ150CA-13 from Diodes Incorporated is a bi-directional 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 voltage (VBR) at 1mA, 243V maximum clamping voltage (VC) at 1.6A peak pulse current (IPP), and operates from –55°C to +150°C.
For engineers reviewing the SMAJ150CA-13 datasheet, SMAJ150CA-13 pinout, SMAJ150CA-13 application, or SMAJ150CA-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC rails, unidirectional vs. bi-directional polarity requirements for AC-coupled or differential signal paths, and thermal derating under sustained ambient conditions above 25°C.
Technical Context
This bi-directional TVS diode uses glass-passivated silicon junction construction to achieve fast response time (<1 ps) and stable clamping performance across temperature. Its symmetrical I-V characteristic enables protection of both polarities without external biasing, making it suitable for Ethernet PHYs, RS-485 transceivers, and USB data lines exposed to ESD or lightning-induced surges.
The device complies with IEC 61000-4-2 (±30 kV contact discharge) and IEC 61000-4-5 (4 kV 8/20 µs surge) standards when properly laid out. Clamping behavior is defined at 1.6A IPP (8.3 ms half-sine), with steady-state power dissipation rated at 1.0W at TL = 75°C and pulse power derated linearly above TA = 25°C per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 8.3 ms surge events up to this level without failure |
| Reverse Standoff Voltage (VRWM) | 150 V - Maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 167–185 V @ 1 mA - Confirmed conduction onset range for bi-directional clamping |
| Max Clamping Voltage (VC) | 243 V @ IPP = 1.6 A - Upper limit of voltage seen by protected circuit during surge |
| Operating Temperature | –55°C to +150°C - Validated junction operation range for automotive under-hood and industrial control use |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.01–2.30 mm terminal spacing |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band omitted (bi-directional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional surge path | Identical terminals; no polarity-connects across protected line pair (e.g., RS-485 A/B) |
| Case | Non-conductive housing | No internal thermal or electrical connection; mechanical mounting only |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enables stable VBR and low leakage (<5 µA @ VRWM) over lifetime and temperature |
| 400W peak pulse rating | Supports IEC 61000-4-5 Level 3 (2 kV line-to-line) surge immunity in compact layout |
| Bi-directional symmetry | Eliminates need for polarity-aware placement on differential or AC-coupled signal traces |
| RoHS-compliant matte tin finish | Ensures solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24V CAN FD and LIN bus transceivers against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point. Use Value: Limits induced surge voltage to <243 V, preserving transceiver integrity without adding series impedance or propagation delay. | Use Scenario: Overvoltage suppression on 12V supply rail feeding microcontroller I/O and sensor interfaces. IC Role / Device Role / Timing Role: Primary front-end TVS for battery-connected subsystems subject to ISO 7637-2 pulses. Use Value: Withstands 100 V/10 ms pulse (Test 5a) while maintaining <5 µA leakage at nominal 12V system voltage. |
| Telecom DSL Line Cards | Medical Patient Monitoring Ports |
Use Scenario: Surge protection on twisted-pair telephone line interface supporting ADSL2+. IC Role / Device Role / Timing Role: Paired bi-directional TVS across tip/ring lines ahead of line driver/receiver ICs. Use Value: Clamps common-mode surges to <243 V while contributing <10 pF total capacitance (Fig. 2), minimizing signal distortion. | Use Scenario: ESD safeguard for isolated analog input channels measuring ECG/EEG signals. IC Role / Device Role / Timing Role: Final-stage TVS on patient-connected electrode inputs meeting IEC 60601-1 creepage/clearance requirements. Use Value: Provides ±30 kV IEC 61000-4-2 contact discharge protection without introducing measurable leakage current into high-impedance front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150CA-13 | Same VRWM/VBR/VC specs but SMB package (larger footprint, higher thermal mass) | Better steady-state power handling (1.5W vs. 1.0W); suited for higher ambient or repeated surge duty | Select when board space allows and thermal margin is critical over size constraints |
| SMCJ150CA-13 | Same electrical specs, SMC package (6.2 × 7.2 mm), 1500W peak rating | Higher pulse energy capacity; used where IEC 61000-4-5 Level 4 (4 kV) must be met with margin | Choose when surge test compliance requires >400W headroom or legacy SMC footprint reuse is needed |
Compared with SMBJ150CA-13 and SMCJ150CA-13, SMAJ150CA-13 delivers identical clamping performance in the smallest standardized surface-mount TVS outline, optimizing PCB area for space-constrained designs where 400W pulse capability suffices.
Availability
SMAJ150CA-13 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom DSL line cards, and medical patient monitoring ports requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ150CA-13 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.
The SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for robust, cost-effective overvoltage protection in high-volume industrial, automotive, and communications equipment.
FAQ
What is the meaning of the 'C' suffix in SMAJ150CA-13?
The 'C' suffix denotes bi-directional configuration, confirming symmetrical clamping behavior for both positive and negative transients. Unlike unidirectional variants (e.g., SMAJ150A-13), it has no cathode band marking and is used where polarity-agnostic protection is required, such as across differential signal pairs or AC supply lines.
Can SMAJ150CA-13 be used in place of a unidirectional TVS like SMAJ150A-13?
Yes, but only if the circuit does not rely on DC blocking or polarity-specific forward conduction. SMAJ150CA-13 will clamp both polarities equally, whereas SMAJ150A-13 conducts only during reverse-biased surges. Substitution may cause unintended conduction in DC-biased lines, so verify signal path polarity and bias conditions before replacement.
What is the maximum recommended PCB trace length between SMAJ150CA-13 and the protected IC?
Trace inductance directly impacts clamping effectiveness. For optimal performance, keep total trace length (including ground return) under 10 mm. Longer paths increase voltage overshoot during fast transients; use dedicated low-inductance ground planes and place the TVS within 5 mm of the connector or IC pin being protected.
Does SMAJ150CA-13 meet AEC-Q200 stress testing requirements for automotive use?
No-SMAJ150CA-13 is not AEC-Q200 qualified. While its operating temperature range (–55°C to +150°C) meets automotive under-hood thermal demands, it lacks the full qualification testing (e.g., temperature cycling, humidity bias, mechanical shock) required for AEC-Q200 Grade 2 or 3 components. For automotive safety-critical systems, select Diodes' AEC-Q200-qualified P6SMBJ150CA or similar.
SMAJ150CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for SMAJ150CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CA-13 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 reliable?
The price and inventory of SMAJ150CA-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ150CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CA-13?
SMAJ150CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CA-13 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?
For technical support, including SMAJ150CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CA-13 requirements.
6.How does Aetrix verify that SMAJ150CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ150CA-13 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 meets industry standards.
7.What is the process for return or replacement of SMAJ150CA-13?
All SMAJ150CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CA-13, 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 part is unused and in its original packaging.
Return procedure for SMAJ150CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150CA-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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