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Taiwan Semiconductor Corporation SMBJ90CH
- Part No.:
- SMBJ90CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90CH.pdf
- Description:
- 600W, 111V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,798
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Product details
Overview
SMBJ90CH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 90 V working stand-off voltage (VWM), 100–122 V breakdown voltage (VBR), 160 V maximum clamping voltage (VC) at 3.9 A peak pulse current, and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ90CH datasheet, SMBJ90CH pinout, SMBJ90CH application, or SMBJ90CH equivalent, this device is selected for robust ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, AEC-Q101 qualification, and low leakage (<1 µA above 10 V) in 12 V/24 V vehicle subsystems, DC power interfaces, and I/O line protection where polarity-agnostic clamping is required.
Technical Context
The SMBJ90CH is a unidirectional-capable but explicitly configured bidirectional TVS, indicated by the "CH" suffix per manufacturer ordering nomenclature and confirmed in the "Devices for Bipolar Applications" section. Its glass-passivated junction enables stable VBR tolerance and low leakage across -55°C to +150°C operating range.
It delivers clamping performance under 10/1000 µs waveform per ANSI/IEEE C62.35, with thermal resistance RθJC = 10°C/W and RθJA = 55°C/W, supporting sustained operation at up to 3 W steady-state dissipation and 100 A non-repetitive forward surge (IFSM) in uni-directional mode - though SMBJ90CH is rated for bidirectional use only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin for 72–96 V nominal DC systems |
| VBR min/max | 100 / 122 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transients exceeding system rail |
| VC @ IPP | 160 V @ 3.9 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs |
| PPK | 600 W - Peak pulse power handling per single transient; supports ISO 7637-2 Pulse 5a (load dump) energy levels |
| ID @ VWM | <1 µA - Ultra-low blocking leakage at rated stand-off; minimizes standby power loss in always-on circuits |
| Response time | <1.0 ps - Sub-picosecond junction response; ensures clamping activation before transient edge propagates into protected circuitry |
| TJ max | +150°C - Junction temperature limit enabling under-hood automotive deployment without derating at 125°C ambient |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, symmetrical cathode-band-free outline for bidirectional operation; matte tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound; 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; identical clamping behavior in both directions - eliminates orientation errors during automated placement |
| Cathode band (absent) | Non-applicable | Confirmed absent per "Polarity: As marked" note and CH-suffix designation for bipolar use; terminals are functionally interchangeable |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - required for engine control, body electronics, and ADAS modules |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (capacitive coupling) immunity test profiles |
| Glass passivated junction | Ensures stable VBR and low IR drift over lifetime and humidity exposure - critical for long-term field reliability in harsh environments |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without special handling or dry packs |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and end-of-life recycling mandates |
Applications
| Automotive Power Rail Protection | Industrial DC Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and sensor supply lines in passenger compartment modules against battery dump and load-switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VBAT and GND, shunting surges before they reach 5 V/3.3 V LDOs and microcontrollers. Use Value: Limits voltage excursion to ≤160 V during 10/1000 µs pulses, preventing latch-up or gate oxide damage in downstream ASICs rated for <200 V absolute maximum. | Use Scenario: Safeguarding programmable logic controller (PLC) digital input cards connected to 24 V field wiring exposed to relay coil kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point, operating in parallel with filter capacitors and series impedance. Use Value: Absorbs up to 600 W of transient energy while maintaining <1 µA leakage at 90 V - preserving signal integrity and minimizing false triggering in high-impedance sensing circuits. |
| LED Driver Output Protection | USB-C Power Delivery Line Protection |
Use Scenario: Shielding constant-current LED driver outputs in commercial lighting fixtures from inductive switching spikes generated by nearby AC relays or motors. IC Role / Device Role / Timing Role: Fast-acting voltage clamp across output terminals, activated within <1 ps to prevent overvoltage stress on MOSFET switches and current-sense resistors. Use Value: Clamps transients to 160 V while sustaining 3.9 A peak current - sufficient to handle >100 mJ events common in 24 V industrial lighting systems. | Use Scenario: Providing secondary-level surge immunity on USB-C VBUS lines in docking stations handling up to 20 V / 5 A PD profiles. IC Role / Device Role / Timing Role: Bidirectional TVS placed after EMI filter but before buck converter input, protecting against hot-plug transients and cable discharge events (CDE). Use Value: Delivers sub-1 ps response and <1 µA leakage at 90 V - ensuring no impact on PD negotiation timing or standby current budget while meeting IEC 61000-4-5 Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Same VWM (90 V), VBR (100–122 V), VC (160 V), and DO-214AA package; identical AEC-Q101 and ISO 7637-2 compliance | No functional difference - CA and CH suffixes denote same bidirectional specification per Taiwan Semiconductor's documentation | Select SMBJ90CA if preferred by existing BOM or distributor stock; electrically and mechanically interchangeable with SMBJ90CH |
| SAC9.0 | Lower PPK (400 W), higher VC (170 V @ 2.4 A), same VWM (90 V); also DO-214AA, AEC-Q101 qualified | Reduced surge energy handling and higher clamping voltage - suitable only where lower threat levels are expected or derated design margins apply | Choose SAC9.0 only when cost sensitivity outweighs need for full 600 W capability; verify clamping margin against protected IC's absolute max ratings |
Compared with SMBJ90CA (identical spec) and SAC9.0 (lower power, higher VC), SMBJ90CH provides guaranteed 600 W surge absorption and tighter clamping at 160 V - making it the preferred choice for automotive front-end power domains and industrial equipment requiring full ISO 7637-2 Pulse 5a resilience.
Availability
SMBJ90CH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC input modules, LED driver output stages, and USB-C PD docking station protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ90CH 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, MOSFETs, and power management devices for automotive and industrial markets.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12 V/24 V vehicle electrical systems and ruggedized industrial power interfaces - emphasizing low leakage, tight VBR tolerance, and repeatable clamping under repetitive surge stress.
FAQ
What does the "CH" suffix indicate in SMBJ90CH?
The "CH" suffix in SMBJ90CH denotes a bidirectional configuration per Taiwan Semiconductor's ordering nomenclature. Unlike "H"-suffixed unidirectional parts, SMBJ90CH has no cathode marking and provides symmetrical clamping in both polarities - confirmed in the "Devices for Bipolar Applications" section of the datasheet and validated by its absence of polarity band in the package outline.
Is SMBJ90CH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
SMBJ90CH is not rated for ISO 7637-2 Pulse 5a, which requires clamping up to 60 V superimposed on 14 V systems and demands much higher energy handling (≥1000 W). SMBJ90CH's 600 W PPK and 160 V VC are appropriate for Pulses 1, 2a, 2b, 3a, and 3b - verified in the "Meets ISO 7637-2" feature list. For Pulse 5a, a higher-power TVS such as 5.0SMDJ90A is recommended.
What is the maximum clamping voltage of SMBJ90CH and at what test condition?
The maximum clamping voltage of SMBJ90CH is 160 V, measured at a peak pulse current (IPP) of 3.9 A under the standardized 10/1000 µs double-exponential waveform per ANSI/IEEE C62.35. This value is specified in the Electrical Specifications table on page 3 of the datasheet and defines the upper voltage bound imposed on protected circuitry during transient events.
Does SMBJ90CH require moisture sensitivity baking before reflow soldering?
No, SMBJ90CH does not require moisture sensitivity baking before reflow soldering. It is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed using standard reflow profiles without preconditioning - simplifying SMT line integration and reducing manufacturing overhead.
How does SMBJ90CH differ from SMBJ90AH?
SMBJ90AH is a unidirectional variant with cathode band marking and VF = 5.0 V at 50 A, whereas SMBJ90CH is bidirectional with no polarity marking and no forward voltage specification. Their VWM (90 V), VBR (100–122 V), and VC (160 V) are identical, but SMBJ90CH must be used where polarity-agnostic clamping is required - e.g., AC-coupled lines or differential buses - while SMBJ90AH suits DC rails with defined ground reference.
SMBJ90CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 160V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SMBJ90CH FAQ
1.How can I place an order for SMBJ90CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90CH 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 SMBJ90CH reliable?
The price and inventory of SMBJ90CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90CH is usually 5 days.
3.What payment methods are accepted for SMBJ90CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90CH?
SMBJ90CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90CH 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 SMBJ90CH?
For technical support, including SMBJ90CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90CH requirements.
6.How does Aetrix verify that SMBJ90CH is sourced from the original manufacturer or authorized distributors?
All SMBJ90CH 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 SMBJ90CH meets industry standards.
7.What is the process for return or replacement of SMBJ90CH?
All SMBJ90CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90CH, 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 SMBJ90CH part is unused and in its original packaging.
Return procedure for SMBJ90CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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