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Taiwan Semiconductor Corporation SMBJ90A
- Part No.:
- SMBJ90A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90A.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SMBJ90A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in DC power lines and signal interfaces. It features a 90 V working stand-off voltage (VWM), 100–111 V breakdown voltage (VBR), 146 V maximum clamping voltage (VC) at 4.3 A peak pulse current (IPP), and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ90A datasheet, SMBJ90A pinout, SMBJ90A application, or SMBJ90A equivalent, key selection criteria include clamping performance under IEC 61000-4-5 surge conditions, leakage current below 1 µA at 90 V, compatibility with automated SMT assembly, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The SMBJ90A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range (100–111 V at 1 mA test current). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at VWM = 90 V), while the DO-214AA package provides thermal resistance of 55 °C/W (junction-to-ambient) and supports 100 A non-repetitive forward surge capability.
It meets ISO 7637-2 immunity requirements for automotive electronics and delivers consistent clamping performance across temperature (–55 °C to +150 °C operating range), with derated pulse power above 25 °C per standardized derating curve. The device is halogen-free and RoHS-compliant, rated MSL Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min / max | 100 V / 111 V @ 1 mA - Confirmed avalanche initiation range for reliable overvoltage triggering |
| VC @ IPP | 146 V @ 4.3 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs waveform |
| ID @ VWM | <1 µA - Minimal leakage at rated stand-off, preserving system efficiency |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and J-STD-002 solderability |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, UL 94V-0 flammability rating, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased surge input terminal | Connected to protected line (e.g., 90 V rail); clamps transients toward anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1 ps response time | Enables suppression of fast ESD and EFT events before sensitive ICs are damaged |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage drift, and long-term reliability under thermal cycling |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking, simplifying SMT manufacturing |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU directives for environmentally constrained applications |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges up to 146 V. Use Value: Limits voltage seen by downstream PMICs and microcontrollers to safe levels per ISO 7637-2 Pulse 5a. | Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on signal line to preserve accuracy while diverting >8 kV HBM transients. Use Value: Prevents latch-up or parametric shift in precision amplifiers without loading the signal path. |
| LED Driver Supply Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding constant-current LED drivers from inductive kickback during MOSFET switching. IC Role / Device Role / Timing Role: Fast-clamping TVS across driver output to absorb energy from coil flyback. Use Value: Eliminates need for snubber RC networks while maintaining 600 W surge capacity and <1 ps reaction. | Use Scenario: Hardening -48 V telecom power inputs against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS on input rail, coordinated with upstream fuses and secondary TVS stages. Use Value: Provides first-line clamping at 146 V VC to protect DC-DC converters meeting IEC 61000-4-5 Level 4. |
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 | Bidirectional version; symmetric VBR (100–111 V) in both directions; no polarity marking required | Suitable for AC-coupled or floating signal lines where polarity reversal may occur | Select SMBJ90CA only if bidirectional clamping is required; SMBJ90A offers lower leakage and tighter VBR tolerance for DC rails |
| SAC9.0 | Same VWM (9.0 V) but lower PPK (400 W); different package (DO-214AC/SMA); higher VC (15.4 V @ 25 A) | Not suitable for 90 V systems; intended for low-voltage logic-level protection | SAC9.0 is not a voltage-scaled alternative; for 90 V systems, SMBJ90A remains the appropriate 600 W DO-214AA solution |
Compared with SMBJ90CA and SAC9.0, the SMBJ90A delivers optimized unidirectional clamping for 90 V DC power rails-offering superior 600 W surge capacity, lower leakage, and automotive-grade ISO 7637-2 validation not found in lower-power or bidirectional variants.
Availability
SMBJ90A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, LED driver protection, and telecom DC input conditioning requiring stable component supply and full traceability.
Supply support for SMBJ90A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMBJ series was developed specifically for high-reliability, high-energy transient suppression in harsh environments-emphasizing robust clamping, automated assembly compatibility, and stringent automotive qualification standards.
FAQ
What is the maximum clamping voltage of SMBJ90A under standard 10/1000 µs surge conditions?
The SMBJ90A has a maximum clamping voltage (VC) of 146 V when subjected to its rated peak pulse current of 4.3 A using the 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ90A maintains this clamping performance across its full operating temperature range, with derating applied above 25°C per the official pulse derating curve.
Is SMBJ90A unidirectional or bidirectional, and how is polarity identified?
SMBJ90A is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA (SMB) package body. The cathode must be connected to the line being protected (e.g., +90 V rail), and the anode to reference ground. Bidirectional variants use the "C" or "CA" suffix (e.g., SMBJ90CA); the SMBJ90A's unidirectional structure enables lower leakage (<1 µA at 90 V) and tighter VBR tolerance than its bidirectional counterparts.
Does SMBJ90A meet automotive transient immunity standards?
Yes, SMBJ90A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), making it suitable for 12 V and 24 V automotive electronic control units. Its 600 W peak pulse rating, 146 V clamping, and –55 °C to +150 °C operating range align with AEC-Q101 stress test profiles, though formal AEC-Q101 qualification status must be confirmed via Taiwan Semiconductor's official product documentation.
What is the leakage current specification for SMBJ90A at its working stand-off voltage?
SMBJ90A exhibits a maximum blocking leakage current (ID) of less than 1 µA when biased at its rated working stand-off voltage (VWM) of 90 V and tested at TA = 25°C. This ultra-low leakage preserves system efficiency in always-on circuits and avoids false triggering in high-impedance sensing paths. Leakage remains within specification across the full –55 °C to +125 °C ambient range, with minor increase only above 125 °C.
Can SMBJ90A be used in automated SMT assembly processes without special handling?
Yes, SMBJ90A is qualified for standard automated surface-mount assembly. It carries Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow. Its DO-214AA (SMB) package features matte tin-plated leads compliant with J-STD-002, and the device withstands standard lead-free reflow profiles (peak 260 °C). Taiwan Semiconductor confirms suitability for high-speed pick-and-place equipment.
SMBJ90A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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)
SMBJ90A FAQ
1.How can I place an order for SMBJ90A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90A 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 SMBJ90A reliable?
The price and inventory of SMBJ90A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90A is usually 5 days.
3.What payment methods are accepted for SMBJ90A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90A?
SMBJ90A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90A 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 SMBJ90A?
For technical support, including SMBJ90A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90A requirements.
6.How does Aetrix verify that SMBJ90A is sourced from the original manufacturer or authorized distributors?
All SMBJ90A 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 SMBJ90A meets industry standards.
7.What is the process for return or replacement of SMBJ90A?
All SMBJ90A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90A, 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 SMBJ90A part is unused and in its original packaging.
Return procedure for SMBJ90A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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