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Diodes Incorporated SMAJ150A-13
- Part No.:
- SMAJ150A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150A-13.pdf
- Description:
- TVS DIODE 150VWM 243VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,189
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Product details
Overview
SMAJ150A-13 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 @ 1mA), 243V max clamping voltage at 1.6A peak pulse current (IPP), and operates from –55°C to +150°C junction temperature - used in industrial power supply input stages.
For engineers reviewing the SMAJ150A-13 datasheet, SMAJ150A-13 pinout, SMAJ150A-13 application, or SMAJ150A-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD rails, peak pulse current handling under IEC 61000-4-5 surge waveforms, thermal derating at elevated ambient temperatures, and compatibility with automated SMT assembly using SMA package footprint.
Technical Context
This TVS diode employs glass-passivated silicon junction construction for stable avalanche performance and fast response (<1 ps). Its unidirectional polarity enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device complies with JEDEC-standard 8.3ms half-sine surge testing (IFSM = 40A), supports steady-state power dissipation of 1.0W at TL = 75°C, and maintains <5 µA reverse leakage at VRWM - critical for low-quiescent-power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single IEC 61000-4-5 surge events without degradation |
| Reverse Standoff Voltage (VRWM) | 150V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 167–185V @ 1mA - defines onset of controlled avalanche clamping |
| Max Clamping Voltage (VC) | 243V @ IPP = 1.6A - limits transient voltage seen by downstream circuitry |
| Peak Pulse Current (IPP) | 1.6A - peak current handled at VC; derived from 400W / 243V |
| Operating Temperature | –55°C to +150°C - validated for under-hood automotive and industrial control environments |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMT outline with 4.80–5.59mm body length |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case, UL 94V-0 rated, cathode band marked on one end. Terminals are solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / low-side reference | Connected to system ground or lower-potential rail; conducts during positive transients when cathode is biased higher |
| Cathode | Protected line input / high-side connection | Connected to line being protected (e.g., 150V DC bus); blocks reverse current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| 400W peak pulse rating | Meets Level 4 IEC 61000-4-5 (4kV/2Ω) surge immunity requirements |
| Fast response time | <1 ps junction response enables clamping before sensitive ICs experience overstress |
| RoHS-compliant finish | Matte tin plating compatible with lead-free reflow profiles (J-STD-020C Level 1) |
| SMA package footprint | Enables drop-in replacement for legacy SMAJ/SMBJ series in existing PCB layouts |
Applications
| Industrial PLC Input Protection | Telecom DC Power Feed |
|---|---|
Use Scenario: 150V DC power feed to remote base station equipment exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input stage. Use Value: Limits transient voltage to ≤243V, preventing damage to 200V-rated input capacitors and MOSFETs. | Use Scenario: Protection of 130–150V DC distribution bus in central office power systems. IC Role / Device Role / Timing Role: Standoff-clamp TVS in parallel with bulk filter capacitor. Use Value: Absorbs 400W surge energy without latch-up or thermal runaway, maintaining bus integrity. |
| Automotive Body Control Module | Renewable Energy Inverter DC Link |
Use Scenario: 12V–150V hybrid vehicle subsystem powered from high-voltage battery via DC-DC converter. IC Role / Device Role / Timing Role: Secondary surge protector on isolated 150V auxiliary rail. Use Value: Withstands load dump transients up to 180V while maintaining <5µA leakage at nominal voltage. | Use Scenario: DC link protection in solar string inverters operating at 150V nominal bus voltage. IC Role / Device Role / Timing Role: Clamp device across DC bus capacitors to suppress switching-induced overshoot. Use Value: 243V clamping ensures IGBT gate drivers remain within safe operating area during fast dv/dt events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | Same VRWM/VBR/VC specs but SMB package (larger footprint, 600W rating) | Higher power handling; requires PCB layout change | Select when surge energy exceeds 400W or board space allows larger package |
| 1.5SMC150A | Same electrical specs, SMC package (7.0×6.2mm vs SMA 5.3×2.6mm), 1500W rating | Designed for higher-energy surges; incompatible footprint | Choose only if system-level surge testing demands >400W capability and re-layout is feasible |
Compared with SMBJ150A and 1.5SMC150A, SMAJ150A-13 offers optimal balance of compact size, 400W surge capacity, and compatibility with high-density SMT layouts - making it preferred for space-constrained industrial and telecom modules where full 600W+ rating is unnecessary.
Availability
SMAJ150A-13 is available at Aetrix Electronics and suitable for industrial PLC input protection, telecom DC power feed, automotive body control modules, and renewable energy inverter DC link applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ150A-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, automotive, and communications markets.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for robust, surface-mount overvoltage protection in high-density power and interface circuits where fast response and stable clamping are mandatory.
FAQ
Is SMAJ150A-13 unidirectional or bidirectional?
SMAJ150A-13 is unidirectional, indicated by the absence of "C" suffix (e.g., SMAJ150CA-13 would be bidirectional). It conducts only when cathode voltage exceeds anode by ≥167V, blocking reverse current below VRWM = 150V. Polarity is marked by a cathode band on the SMA package body.
What is the maximum clamping voltage at rated peak pulse current?
The maximum clamping voltage (VC) is 243V at peak pulse current (IPP) of 1.6A, measured under 8.3ms half-sine waveform conditions per JEDEC standards. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMAJ150A-13 be used in place of SMAJ150CA-13?
No - SMAJ150A-13 is unidirectional and cannot replace the bidirectional SMAJ150CA-13 in AC-coupled or floating signal lines. The "C" variant clamps symmetrically for both polarities and lacks a cathode band marking. Substitution requires circuit review to confirm DC bias presence and polarity constraints.
Does this part meet lead-free assembly requirements?
Yes - SMAJ150A-13 uses matte tin plating compliant with J-STD-020C Level 1 moisture sensitivity and supports standard lead-free reflow profiles (peak 260°C). It is RoHS-compliant per EU Directive Annex Notes 5 and 7, with exemptions applied for high-temperature solder and glass content.
SMAJ150A-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:
- 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 FAQ
1.How can I place an order for SMAJ150A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150A-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 SMAJ150A-13 reliable?
The price and inventory of SMAJ150A-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ150A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150A-13?
SMAJ150A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150A-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 SMAJ150A-13?
For technical support, including SMAJ150A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150A-13 requirements.
6.How does Aetrix verify that SMAJ150A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ150A-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 SMAJ150A-13 meets industry standards.
7.What is the process for return or replacement of SMAJ150A-13?
All SMAJ150A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150A-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 SMAJ150A-13 part is unused and in its original packaging.
Return procedure for SMAJ150A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150A-13 Tags
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