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Taiwan Semiconductor Corporation SMBJ150AH
- Part No.:
- SMBJ150AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150AH.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
SMBJ150AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 150V working stand-off voltage (VWM), and clamps transients to ≤243V at 2.5A peak impulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b surges.
For engineers reviewing the SMBJ150AH datasheet, SMBJ150AH pinout, SMBJ150AH application, or SMBJ150AH equivalent, key selection criteria include clamping voltage under specified IPP, leakage current at VWM, AEC-Q101 qualification status, thermal resistance (RθJA = 55°C/W), and unidirectional polarity marking.
Technical Context
The SMBJ150AH operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and low leakage (<1 µA above 10 V). Its breakdown voltage is 167–185 V at 1 mA test current, and it maintains stable clamping up to 150°C junction temperature.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing and ISO 7637-2 immunity requirements. The device uses a single-die configuration in DO-214AA package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 167 V / 185 V @ 1 mA - Ensures reliable avalanche conduction onset within defined tolerance |
| VC @ IPP | 243 V @ 2.5 A - Clamping voltage during 10/1000 µs surge, limiting downstream voltage stress |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform, derated above 25°C |
| ID @ VWM | <1 µA - Minimal leakage ensures negligible standby power loss in high-impedance circuits |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient enables thermal design margin in SMB footprint |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; leads are matte tin-plated, J-STD-002 solderable, and meet JESD 201 Class 2 whisker resistance. Polarity is unidirectional, with cathode terminal designated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient |
| Cathode | Reverse-biased input / Protected line connection | Connected to line being protected (e.g., 12 V rail); blocks VWM until breakdown threshold exceeded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, HTRB, and mechanical shock |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Clamping ratio VC/VBR | ≤1.46 (243 V / 167 V) - Tight ratio ensures predictable overvoltage limiting without excessive margin |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow - supports standard SMT assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before reaching PMIC or MCU inputs. Use Value: Limits rail voltage to ≤243 V during 2.5 A transients, preventing latch-up or oxide damage in downstream ICs rated for 36 V absolute max. | Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed across noisy motor control zones. IC Role / Device Role / Timing Role: TVS placed at sensor signal line entry to absorb ESD and coupled transients before precision amplifier inputs. Use Value: Sub-1 µA leakage preserves microvolt-level signal integrity; 1.0 ps response prevents transient energy from propagating into signal chain. |
| LED Driver Output Protection | DC-DC Converter Input Stage |
Use Scenario: Constant-current LED drivers powering exterior lighting subject to cable discharge events and relay bounce. IC Role / Device Role / Timing Role: Unidirectional TVS connected across driver output terminals to shunt reverse-polarity surges and inductive kickback. Use Value: Withstands 100 A IFSM surge (8.3 ms half-sine), protecting MOSFET switches and current-sense resistors from destructive energy. | Use Scenario: 48 V input stage of isolated DC-DC converters in telecom or industrial power supplies. IC Role / Device Role / Timing Role: TVS installed at converter input to limit voltage spikes from upstream switching noise or hot-plug events. Use Value: 600 W PPK rating handles repetitive 10/1000 µs pulses without degradation; RθJA = 55°C/W allows operation at full rating up to 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | Same VWM (150 V), but higher VC = 266 V @ 2.3 A; no AEC-Q101 qualification | Lacks automotive stress validation; suitable only for commercial/industrial use | Select SMBJ150A if AEC-Q101 is not required and higher clamping voltage is acceptable |
| SMCJ150A | Same electrical specs but in larger DO-214AB (SMC) package; RθJA = 35°C/W | Higher thermal performance but requires larger PCB area and different pad layout | Choose SMCJ150A when thermal budget is constrained and board space permits larger footprint |
Compared with SMBJ150A and SMCJ150A, SMBJ150AH provides automotive-grade reliability in the smallest standardized SMB footprint while maintaining tight clamping (243 V) and low leakage-critical for space-constrained, safety-critical 12 V/24 V systems.
Availability
SMBJ150AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver protection, and DC-DC converter input stages requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBJ150AH 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 power devices since 1979.
The SMBJH series was designed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in compact SMB packages.
FAQ
What is the maximum clamping voltage of SMBJ150AH under standard test conditions?
The SMBJ150AH has a maximum clamping voltage (VC) of 243 V when subjected to a 10/1000 µs surge current of 2.5 A. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ150AH achieves this clamping performance while maintaining low leakage and fast response, making it suitable for sensitive 150 V-rated systems.
Is SMBJ150AH qualified for automotive applications?
Yes, SMBJ150AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock-validating its suitability for under-hood automotive electronics. The SMBJ150AH's qualification is documented in Taiwan Semiconductor's official A2102 datasheet revision.
What is the polarity configuration of SMBJ150AH?
SMBJ150AH is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AA (SMB) package. It blocks voltages up to 150 V in reverse bias and conducts only when reverse voltage exceeds its breakdown range (167–185 V). This configuration is ideal for protecting positive power rails where polarity is fixed and reverse-voltage transients dominate.
How does SMBJ150AH compare to SMBJ150H in terms of electrical performance?
SMBJ150AH offers tighter breakdown voltage tolerance (167–185 V) versus SMBJ150H (167–204 V), lower clamping voltage (243 V vs. 266 V), and higher peak impulse current rating (2.5 A vs. 2.3 A). Both share identical VWM (150 V) and PPK (600 W), but SMBJ150AH delivers improved transient suppression precision and margin for critical 150 V systems.
What is the thermal resistance of SMBJ150AH, and how does it affect PCB layout?
SMBJ150AH has a junction-to-ambient thermal resistance (RθJA) of 55°C/W in standard JEDEC mounting conditions. This value assumes minimal copper pour; adding thermal vias and 1-in² copper land reduces effective RθJA significantly. For sustained surge duty, designers should verify junction temperature stays below 150°C using SMBJ150AH's 3 W steady-state power rating and derating curves from Figure 2.
SMBJ150AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 2.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ150AH FAQ
1.How can I place an order for SMBJ150AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150AH 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 SMBJ150AH reliable?
The price and inventory of SMBJ150AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150AH is usually 5 days.
3.What payment methods are accepted for SMBJ150AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150AH?
SMBJ150AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150AH 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 SMBJ150AH?
For technical support, including SMBJ150AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150AH requirements.
6.How does Aetrix verify that SMBJ150AH is sourced from the original manufacturer or authorized distributors?
All SMBJ150AH 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 SMBJ150AH meets industry standards.
7.What is the process for return or replacement of SMBJ150AH?
All SMBJ150AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150AH, 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 SMBJ150AH part is unused and in its original packaging.
Return procedure for SMBJ150AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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