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Taiwan Semiconductor Corporation SMBJ9.0AH
- Part No.:
- SMBJ9.0AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0AH.pdf
- Description:
- 600W, 10.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,042
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Product details
Overview
SMBJ9.0AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade circuit protection. It features a 9.0 V working stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR), 15.4 V maximum clamping voltage (VC) at 5 A peak impulse current, and 600 W peak pulse power rating - optimized for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance in 12 V automotive subsystems.
For engineers reviewing the SMBJ9.0AH datasheet, SMBJ9.0AH pinout, SMBJ9.0AH application, or SMBJ9.0AH equivalent, key selection criteria include clamping performance under 10/1000 µs transients, low leakage (<1 µA above 10 V), AEC-Q101 qualification, DO-214AA (SMB) package compatibility, and bidirectional variant availability (SMBJ9.0CAH).
Technical Context
The SMBJ9.0AH operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1 ps response to ESD and electrical fast transients. Its 10.0–11.1 V breakdown range ensures reliable turn-on before downstream IC damage, while 15.4 V clamping at 5 A limits stress on protected circuitry during 10/1000 µs surges.
Thermal design is supported by 10 °C/W junction-to-case and 55 °C/W junction-to-ambient resistance, allowing sustained operation up to 150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - critical for reflow-compatible automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; matches nominal 12 V automotive rail with margin. |
| VBR @ IT=1 mA | 10.0–11.1 V - Confirmed avalanche onset range; guarantees turn-on prior to 15.4 V clamping threshold. |
| VC @ IPP=5 A | 15.4 V - Peak clamped voltage during 10/1000 µs surge; defines worst-case stress on protected load. |
| PPK | 600 W - Non-repetitive peak pulse power handling per IEC 61000-4-5; supports robust ISO 7637-2 immunity. |
| ID @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off; prevents battery drain in always-on automotive modules. |
| TJ max | +150 °C - Enables deployment in under-hood ECUs and motor control units without derating. |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with IPC-7351B land patterns and pick-and-place equipment. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, 0.090 g weight, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side input terminal | Connected to protected line (e.g., LIN bus, sensor supply); conducts avalanche current toward anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM - enables use in safety-critical modules. |
| Clamping voltage ≤15.4 V @ 5 A | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings during ISO 7637-2 Pulse 2b (inductive switch-off). |
| Response time <1.0 ps | Activates faster than most semiconductor switching transients, preventing voltage overshoot propagation into sensitive analog front-ends. |
| Moisture sensitivity Level 1 | Eliminates bake requirements prior to reflow soldering - reduces manufacturing cost and cycle time. |
| RoHS & halogen-free | Complies with EU Directive 2011/65/EU and IEC 61249-2-21 - supports green manufacturing and end-of-life recycling mandates. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus lines and door actuator drivers from load dump and inductive kickback in 12 V vehicle networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN transceiver input and chassis ground to clamp transients before they reach the PHY layer. Use Value: Maintains LIN communication integrity during ISO 7637-2 Pulse 2b (50 V/2 Ω, 50 ms) events without latch-up or degradation. |
Use Scenario: Safeguarding 4–20 mA current-loop sensors in factory automation against EFT bursts and cable coupling noise. IC Role / Device Role / Timing Role: Standoff protection element across sensor supply rails to absorb 5 kV EFT (IEC 61000-4-4) energy without affecting loop accuracy. Use Value: Prevents false triggering of analog-to-digital converters by limiting rail excursion to ≤15.4 V during 10/1000 µs surges. |
| Automotive Lighting Control Unit | DC Motor Driver Input Stage |
Use Scenario: Shielding LED driver ICs from voltage spikes generated by relay switching and PWM dimming in headlamp assemblies. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12 V input rail to divert surge current away from buck controller and gate drivers. Use Value: Enables >100,000-cycle reliability under repeated 100 V/1 Ω load dump pulses per ISO 16750-2. |
Use Scenario: Suppressing back-EMF from brushed DC motors in power seat and window lift systems. IC Role / Device Role / Timing Role: Bidirectional clamping (via SMBJ9.0CAH variant) across H-bridge supply terminals to protect MOSFETs and gate drivers. Use Value: Limits flyback voltage to ≤15.4 V, preventing avalanche failure of 20 V-rated logic-level MOSFETs during abrupt current interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ9.0A | Same DO-214AC (SMA) package; 15.4 V VC @ 5 A; 600 W PPK; but only AEC-Q200 qualified (not Q101). | Limited to non-safety-critical industrial use; not approved for automotive ECU placement without additional validation. | Select when cost sensitivity outweighs automotive qualification requirements and SMA footprint is preferred. |
| Vishay SMF9.0A | DO-219AB (SOD-123FL) package; 15.4 V VC @ 5 A; 200 W PPK; AEC-Q101 qualified; lower surge capacity. | Suitable for space-constrained PCBs but cannot handle full ISO 7637-2 Pulse 1 (300 W, 400 ms) or Pulse 5a (load dump). | Choose for compact consumer-grade designs where 600 W surge headroom is unnecessary. |
Compared with SMBJ9.0AH, SMAJ9.0A lacks AEC-Q101 certification and uses a larger SMA package, while SMF9.0A trades 600 W surge capability for miniaturization - making SMBJ9.0AH the only option meeting full automotive transient immunity with Q101 validation in DO-214AA.
Availability
SMBJ9.0AH is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, lighting control units, and DC motor driver input stages requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for SMBJ9.0AH 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 process validation.
The SMBJH series was developed specifically for automotive-grade transient suppression, targeting ISO 7637-2 compliance and under-hood thermal resilience in 12 V/24 V systems.
FAQ
What is the clamping voltage of SMBJ9.0AH at its rated peak pulse current?
The SMBJ9.0AH has a maximum clamping voltage (VC) of 15.4 V when subjected to a 5 A peak impulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within safe operating area.
Is SMBJ9.0AH suitable for bidirectional transient protection?
No, SMBJ9.0AH is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications such as AC signal lines or differential buses, the SMBJ9.0CAH variant must be used - it shares identical VWM, VBR, and VC specs but conducts in both directions due to symmetrical avalanche structure.
Does SMBJ9.0AH meet automotive qualification standards?
Yes, SMBJ9.0AH is AEC-Q101 qualified and compliant with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles. It also satisfies JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - confirming suitability for automotive electronic control units and under-hood environments.
What is the maximum operating temperature for SMBJ9.0AH?
The SMBJ9.0AH has a maximum junction temperature (TJ) rating of +150 °C and a storage temperature range of –55 °C to +150 °C. Its 10 °C/W junction-to-case thermal resistance allows direct mounting to copper pour or heatsink pads, supporting continuous operation in engine bay modules and motor drive inverters.
How does SMBJ9.0AH differ from SMBJ9.0H?
SMBJ9.0AH offers tighter breakdown voltage tolerance (10.0–11.1 V) versus SMBJ9.0H (10.0–12.2 V), resulting in more consistent clamping behavior and reduced risk of premature conduction. Both share identical package, power rating, and AEC-Q101 qualification - but SMBJ9.0AH is preferred for precision-sensitive automotive applications where VBR consistency impacts system-level immunity margin.
SMBJ9.0AH 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SMBJ9.0AH FAQ
1.How can I place an order for SMBJ9.0AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0AH 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 SMBJ9.0AH reliable?
The price and inventory of SMBJ9.0AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0AH is usually 5 days.
3.What payment methods are accepted for SMBJ9.0AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0AH?
SMBJ9.0AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0AH 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 SMBJ9.0AH?
For technical support, including SMBJ9.0AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0AH requirements.
6.How does Aetrix verify that SMBJ9.0AH is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0AH 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 SMBJ9.0AH meets industry standards.
7.What is the process for return or replacement of SMBJ9.0AH?
All SMBJ9.0AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0AH, 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 SMBJ9.0AH part is unused and in its original packaging.
Return procedure for SMBJ9.0AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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