My Inquiry
My Account
Alpha & Omega Semiconductor Inc. SMDJ150CA
- Part No.:
- SMDJ150CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ150CA.pdf
- Description:
- 1CH 150V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:7,530
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ150CA from Alpha & Omega Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 150 V reverse standoff voltage (VRWM), 167–185 V breakdown voltage (VBR) at 1 mA, 243 V maximum clamping voltage (VC) at 15.5 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives to protect IGBT gate drivers from inductive switching transients.
For engineers reviewing the SMDJ150CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 15 °C/W), JEDEC DO-214AB package compatibility, and compliance with IEC 61000-4-5 surge immunity requirements for Class 3+ systems.
Technical Context
The SMDJ150CA operates as a silicon avalanche diode with glass-passivated junction and bidirectional conduction capability - enabling symmetrical clamping of positive and negative transients without external polarity management. Its fast response time (<1.0 ps) ensures suppression before downstream IC damage occurs, while its 0.01% duty cycle rating supports infrequent but high-magnitude surge events typical in AC line-fed equipment.
Thermally, it is rated for -55 °C to +150 °C junction temperature, with 15 °C/W junction-to-lead thermal resistance when mounted on 8.0 mm × 8.0 mm copper pads - allowing direct integration into high-reliability power supply front-ends where sustained power dissipation must be minimized during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 150 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bus margin in 125–150 V nominal systems. |
| VBR (min/max) | 167 V / 185 V @ 1 mA - Tight 5.4% tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 243 V @ 15.5 A - Clamping voltage under 10/1000 µs surge; limits stress on protected MOSFETs or controllers to <250 V. |
| PPPM | 3000 W - Peak pulse power handling on standardized waveform; enables single-device protection against 4 kV/2 Ω IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance; allows efficient heat transfer to PCB copper, reducing thermal runaway risk. |
| IR @ VRWM | 12.4 µA - Reverse leakage at rated standoff; negligible loading on high-impedance voltage rails like feedback networks. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package: molded plastic case with matte tin lead-free plating, JEDEC-compliant outline, and cathode band marking for unidirectional variants; bidirectional SMDJ150CA has no polarity marking and conducts identically in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Surge current path | Both terminals function identically - no polarity assignment; connects across protected line (e.g., L-N or L-GND) without orientation concern. |
| Case | Thermal interface | Plastic body transfers heat to PCB copper pads; requires 8.0 mm × 8.0 mm minimum pad area per terminal for rated RθJL. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential signals without external diode pairing. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under humidity and thermal cycling per MIL-STD-750. |
| MSL1 moisture sensitivity | Allows reflow soldering at 260 °C peak without popcorn cracking - compatible with standard SMT assembly lines. |
| UL 94V-0 flammability | Self-extinguishing plastic housing meets safety standards for enclosed power electronics in Class I Division 2 environments. |
| Strain relief structure | Reduces mechanical stress at lead-to-body interface during board flexure or thermal expansion mismatch. |
Applications
| Industrial Motor Drives | AC-DC Power Supplies |
|---|---|
Use Scenario: Protection of gate driver ICs and bootstrap circuits against inductive kickback from IGBTs in VFDs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between gate and source terminals to clamp ±200 V transients within 1 ps. Use Value: Prevents gate oxide rupture in 600 V IGBTs by limiting transient voltage to ≤243 V at 15.5 A peak current. | Use Scenario: Input-stage surge suppression on primary-side rectifier outputs in telecom rectifiers. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to absorb 4 kV/2 Ω line-to-ground surges per IEC 61000-4-5 Level 4. Use Value: Maintains system uptime by preventing fuse blowing or MOV degradation during repeated lightning-induced surges. |
| Renewable Energy Inverters | Automotive Onboard Chargers |
Use Scenario: DC-link overvoltage protection in solar string inverters exposed to grid-switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping device across 600–1000 V DC bus to suppress commutation spikes from SiC MOSFETs. Use Value: Extends lifetime of film capacitors by limiting voltage overshoot to <10% above rated bus voltage during fault events. | Use Scenario: Surge protection on AC input stage of 11 kW OBCs subjected to EVSE grid anomalies. IC Role / Device Role / Timing Role: Primary-level TVS on bridge rectifier output to handle 6 kV combination wave surges. Use Value: Meets ISO 16750-2 Pulse 5b requirements without derating, due to 3000 W PPPM and low clamping ratio (VC/VBR ≈ 1.45). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC150CA (Littelfuse) | Same DO-214AB package, 150 V VRWM, but 230 V VC @ 16.5 A; slightly lower clamping ratio (1.53 vs. 1.45). | Marginally higher clamping voltage may require verification against downstream component VDS(max) margins. | Select when UL 497B certification is required - SAC150CA carries explicit telecom surge standard listing. |
| 1.5KE150CA (ON Semiconductor) | Through-hole DO-201 package, identical electrical specs, but 3× higher RθJA (75 vs. 22 °C/W); no MSL1 rating. | Not suitable for high-density SMT layouts; requires manual soldering or wave process; unsuitable for automated reflow. | Choose only for legacy through-hole designs or prototyping where board space and assembly method permit larger footprint. |
Compared with SAC150CA and 1.5KE150CA, the SMDJ150CA offers superior thermal performance in SMT applications (RθJL = 15 °C/W), guaranteed MSL1 reflow compatibility, and tighter VBR tolerance - making it optimal for volume-manufactured industrial power converters requiring repeatable surge immunity.
Availability
SMDJ150CA is available at Aetrix Electronics and suitable for industrial motor drives, AC-DC power supplies, renewable energy inverters, and automotive onboard chargers requiring stable component supply across multi-year production cycles.
Supply support for SMDJ150CA 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, TVS diodes, and power ICs for industrial, computing, and automotive markets.
The SMDJ series is engineered for robust transient suppression in high-power surface-mount applications - targeting designers needing reliable, RoHS-compliant, and halogen-free surge protection with minimal PCB footprint and thermal overhead.
FAQ
What is the clamping voltage of the SMDJ150CA under a 10/1000 µs surge?
The SMDJ150CA exhibits a maximum clamping voltage (VC) of 243 V when subjected to its rated peak pulse current of 15.5 A on a 10/1000 µs waveform. This value is measured per industry-standard test conditions and ensures predictable overvoltage limiting for protected circuitry - critical for safeguarding 200 V-rated gate drivers or 250 V capacitors downstream of the SMDJ150CA.
Is the SMDJ150CA unidirectional or bidirectional?
The SMDJ150CA is a bidirectional transient voltage suppressor, indicated by the "CA" suffix per AOS documentation. It provides symmetrical clamping in both polarities - meaning it functions identically whether voltage stress is applied anode-to-cathode or cathode-to-anode - eliminating orientation concerns during placement and simplifying design for AC-coupled or floating bus protection.
What is the thermal resistance specification for the SMDJ150CA?
The SMDJ150CA has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Its junction-to-ambient resistance (RθJA) is 75 °C/W under standard test conditions. These values directly impact steady-state power handling and transient thermal survivability - confirming suitability for high-reliability power stages where localized heating must remain controlled.
Does the SMDJ150CA meet RoHS and halogen-free requirements?
Yes, the SMDJ150CA is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per AOS' published policy. It carries no brominated flame retardants and meets UL 94V-0 flammability standards - satisfying environmental compliance mandates for industrial, medical, and automotive end equipment sold in EU, US, and Asia-Pacific markets.
What is the maximum peak pulse current rating for the SMDJ150CA?
The SMDJ150CA is rated for a maximum peak pulse current (IPPM) of 15.5 A on the standard 10/1000 µs double-exponential waveform. This rating is derived from its 3000 W peak pulse power (PPPM) and 243 V clamping voltage (VC), and assumes proper PCB layout with specified copper pad dimensions - essential for achieving full surge-handling capability in real-world deployments.
SMDJ150CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- 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):
- 12.4A
- Power - Peak Pulse:
- 3000W (3kW)
- 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-214AB
SMDJ150CA FAQ
1.How can I place an order for SMDJ150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ150CA 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 SMDJ150CA reliable?
The price and inventory of SMDJ150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ150CA is usually 5 days.
3.What payment methods are accepted for SMDJ150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ150CA?
SMDJ150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ150CA 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 SMDJ150CA?
For technical support, including SMDJ150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ150CA requirements.
6.How does Aetrix verify that SMDJ150CA is sourced from the original manufacturer or authorized distributors?
All SMDJ150CA 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 SMDJ150CA meets industry standards.
7.What is the process for return or replacement of SMDJ150CA?
All SMDJ150CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ150CA, 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 SMDJ150CA part is unused and in its original packaging.
Return procedure for SMDJ150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ150CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
