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Taiwan Semiconductor Corporation SMBJ150CA
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- Part No.:
- SMBJ150CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150CA.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,669
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Product details
Overview
SMBJ150CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 150 V working stand-off voltage (VWM), 167–204 V breakdown voltage (VBR), 266 V maximum clamping voltage (VC) at 2.3 A peak impulse current (IPP), and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ150CA datasheet, SMBJ150CA pinout, SMBJ150CA application, or SMBJ150CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at 150 V), and robust thermal performance (RθJA = 55 °C/W) in surface-mount automotive-grade packaging.
Technical Context
The SMBJ150CA operates as a voltage-clamped crowbar device, leveraging an avalanche breakdown mechanism to shunt transients above its VBR threshold. Its bidirectional symmetry enables protection of AC-coupled or floating signal/power lines without polarity concerns.
It sustains non-repetitive 10/1000 µs surges up to 600 W while maintaining clamping below 266 V at 2.3 A, and exhibits <1 µA blocking leakage at rated 150 V VWM - critical for low-power standby circuits. Junction temperature range spans –55 °C to +150 °C, supporting under-hood and industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC RMS operating margin. |
| VBR min/max | 167 / 204 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system overvoltage thresholds. |
| VC @ IPP | 266 V @ 2.3 A - Clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream ICs. |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs event; validates immunity to ISO 7637-2 Pulse 5a/b surges. |
| ID @ VWM | <1 µA - Reverse leakage at full working voltage; preserves battery life in always-on automotive modules. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; enables derated power handling up to +125 °C ambient. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; either terminal serves as input/output for transient suppression in AC or floating systems. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1 ps response time | Clamps ESD and EFT transients before sensitive logic or analog circuitry reacts - meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact). |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1, 2a, 2b, 3a, 3b), enabling direct use in 12 V/24 V vehicle ECUs. |
| Glass passivated junction | Ensures stable VBR and low leakage across temperature and humidity; eliminates risk of parametric drift in harsh environments. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V supply line in engine control unit exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting bus voltage to ≤266 V during ISO 7637-2 Pulse 5a (load dump) events. Use Value: Prevents permanent damage to microcontroller power domains and CAN transceivers without requiring series impedance or active regulation. |
Use Scenario: 4–20 mA current loop interface in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Fast-acting surge shunt protecting precision op-amps and ADC front-ends from field-wiring transients. Use Value: Maintains signal integrity by clamping induced spikes within 1 ps, avoiding latch-up or offset drift in measurement circuitry. |
| LED Driver Overvoltage Protection | ESD-Sensitive Communication Port Guarding |
Use Scenario: Constant-current LED driver board in outdoor signage subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail, absorbing 600 W pulses without degradation. Use Value: Eliminates need for redundant MOVs or gas discharge tubes - reduces BOM count and PCB area while meeting IEC 61000-4-5 Level 3. |
Use Scenario: RS-485 transceiver port on building management controller connected to long unshielded cables. IC Role / Device Role / Timing Role: Bidirectional line protector on A/B differential pair, suppressing common-mode ESD and fast transients. Use Value: Enables >15 kV HBM ESD robustness without degrading signal rise/fall times due to ultra-low junction capacitance (~50 pF at 0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150CA | Same DO-214AA package, identical VWM (150 V), but higher VC = 276 V @ 2.2 A; slightly lower PPK (400 W). | Lower energy handling limits suitability for ISO 7637-2 Pulse 5a; acceptable for Pulse 1/2/3 only. | Select when cost sensitivity outweighs peak surge margin, and system-level testing confirms 400 W sufficiency. |
| ON Semiconductor SMCJ150CA | DO-214AB (SMC) package (larger footprint), same VWM/VBR/VC specs, higher PPK (1500 W), RθJA = 35 °C/W. | Requires PCB layout change; superior thermal performance supports higher repetition rates in industrial motor drives. | Choose when sustained surge duty cycle exceeds SMBJ thermal limits or when legacy SMC footprint is standardized. |
Compared with SMBJ150CA, SMAJ150CA trades 200 W peak power and 10 V higher clamping for cost and footprint compatibility, while SMCJ150CA delivers triple the surge energy capacity at the expense of board space and assembly compatibility.
Availability
SMBJ150CA is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and LED driver overvoltage protection requiring stable component supply across extended production lifecycles.
Supply support for SMBJ150CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and MOSFETs for automotive and industrial markets.
The SMBJ series was developed specifically for AEC-Q101-compliant surface-mount surge protection in space-constrained automotive power domains and industrial control systems demanding high reliability and low leakage.
FAQ
What is the maximum clamping voltage of SMBJ150CA under standard test conditions?
The SMBJ150CA has a maximum clamping voltage (VC) of 266 V when subjected to a 10/1000 µs surge waveform at 2.3 A peak impulse current (IPP), as specified in the Taiwan Semiconductor datasheet Rev. R2104. This value defines the upper voltage limit imposed on protected circuitry during transient events and is measured with strict adherence to ANSI/IEEE C62.35 standards.
Is SMBJ150CA unidirectional or bidirectional, and how is polarity indicated?
SMBJ150CA is a bidirectional TVS diode - it provides symmetrical clamping in both forward and reverse directions, with no cathode band or polarity marking required. The "CA" suffix explicitly denotes bidirectional configuration per Taiwan Semiconductor's ordering convention, distinguishing it from unidirectional "A" variants like SMBJ150A.
Does SMBJ150CA meet automotive surge immunity standards such as ISO 7637-2?
Yes, SMBJ150CA is characterized and validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in 12 V and 24 V automotive electrical systems. Its 600 W peak pulse power rating and fast sub-1 ps response enable robust protection against load dump, inductive switching, and coupling transients without external circuitry.
What is the junction-to-ambient thermal resistance (RθJA) of SMBJ150CA, and why does it matter?
The SMBJ150CA has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W, measured on standard FR-4 PCB with JEDEC-defined pad layout. This parameter directly determines how much average power the device can safely dissipate at elevated ambient temperatures - for example, at 100 °C ambient, its usable power drops to ~0.9 W before exceeding the 150 °C max junction temperature.
Can SMBJ150CA be used in place of SMBJ150A in a design?
No - SMBJ150CA and SMBJ150A are functionally distinct: SMBJ150CA is bidirectional (no polarity), while SMBJ150A is unidirectional (cathode-banded) with different forward voltage behavior. Substituting one for the other risks incorrect clamping directionality, especially in AC or floating circuits, and may violate system-level surge test compliance.
SMBJ150CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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):
- 2.5A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ150CA FAQ
1.How can I place an order for SMBJ150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150CA 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 SMBJ150CA reliable?
The price and inventory of SMBJ150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150CA is usually 5 days.
3.What payment methods are accepted for SMBJ150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150CA?
SMBJ150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150CA 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 SMBJ150CA?
For technical support, including SMBJ150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150CA requirements.
6.How does Aetrix verify that SMBJ150CA is sourced from the original manufacturer or authorized distributors?
All SMBJ150CA 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 SMBJ150CA meets industry standards.
7.What is the process for return or replacement of SMBJ150CA?
All SMBJ150CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150CA, 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 SMBJ150CA part is unused and in its original packaging.
Return procedure for SMBJ150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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