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Taiwan Semiconductor Corporation SMBJ100CAH
- Part No.:
- SMBJ100CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ100CAH.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,569
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Product details
Overview
SMBJ100CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 100 V working stand-off voltage (VWM), 111–123 V breakdown voltage (VBR), 162 V maximum clamping voltage (VC) at 3.8 A peak impulse current, and 600 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the SMBJ100CAH datasheet, SMBJ100CAH pinout, SMBJ100CAH application, or SMBJ100CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at 100 V), and thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ100CAH operates as a bidirectional TVS diode with symmetrical avalanche breakdown in both polarities, enabling robust protection of differential or AC-coupled signal/power lines without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
It meets automotive-grade requirements including AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 (per J-STD-020). The device is rated for junction temperatures from –55 °C to +150 °C and supports surge immunity per ISO 7637-2 across all defined test pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 111 / 123 V @ 1 mA - Confirmed breakdown range ensuring predictable turn-on during transients |
| VC @ IPP | 162 V @ 3.8 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge events |
| PPK | 600 W - Peak pulse power handling capacity per standard 10/1000 µs waveform |
| ID @ VWM | <1 µA - Minimal leakage preserves system efficiency and battery life in always-on circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 55 °C/W - Thermal resistance defines required PCB copper area for sustained power dissipation |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; bidirectional configuration means both terminals are functionally symmetric - no anode/cathode distinction in circuit use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional surge path input | Connects to protected line (e.g., CAN_H or power rail); conducts during overvoltage in either polarity |
| Terminal 2 | Bidirectional surge path return | Connects to reference plane (e.g., ground or CAN_L); completes low-impedance clamp path during transient |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics under temperature cycling, mechanical shock, and humidity testing per JEDEC standards |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift |
| Fast response time <1 ps | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing and end-of-life processing |
Applications
| Automotive CAN Bus Protection | Industrial Power Rail Clamp |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across CAN bus lines to limit common-mode surges while preserving signal integrity. Use Value: Maintains CAN communication integrity by clamping transients to ≤162 V, preventing receiver IC damage during ISO 7637-2 Pulse 2b events. | Use Scenario: Safeguarding 24 V DC input stage of PLC I/O modules from inductive switching spikes. IC Role / Device Role / Timing Role: Primary surge suppression element on main power entry, shunting energy to chassis ground during relay coil de-energization. Use Value: Absorbs up to 600 W of transient energy without failure, enabling reliable operation in factory automation environments with frequent motor switching. |
| LED Driver Overvoltage Protection | Smart Meter ESD Shielding |
Use Scenario: Securing constant-current LED driver inputs against lightning-induced surges in outdoor lighting systems. IC Role / Device Role / Timing Role: Front-end TVS device parallel to input capacitor, clamping line-to-ground transients before they reach controller ICs. Use Value: Limits clamping voltage to 162 V at 3.8 A, protecting 100 V-rated MOSFETs and gate drivers from overstress during 10/1000 µs surges. | Use Scenario: Protecting RS-485 and metrology IC interfaces in utility smart meters from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on communication lines, minimizing signal distortion while meeting IEC 61000-4-2 Level 4 (15 kV air/8 kV contact). Use Value: Delivers sub-1 µA leakage at 100 V, preserving meter accuracy and battery backup runtime during long-term standby operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ100CA | Same DO-214AC (SMA) package; slightly higher VC (170 V @ 3.7 A); RθJA = 65 °C/W | Lower power density due to larger thermal resistance; less suitable for high-ambient industrial designs | Acceptable where board space allows SMA footprint and thermal margin exists |
| Vishay SMA6J100CA | DO-214AC (SMA) package; identical VWM/VBR specs; VC = 165 V @ 3.7 A; AEC-Q101 qualified | Same automotive qualification but lacks ISO 7637-2 Pulse 3b validation per published datasheet | Preferred for cost-sensitive non-automotive industrial use; verify Pulse 3b immunity separately if required |
Compared with SMBJ100CAH, SMAJ100CA offers similar clamping but requires more PCB area and has inferior thermal performance, while SMA6J100CA matches electrical specs but omits explicit ISO 7637-2 Pulse 3b validation-making SMBJ100CAH the only option fully validated across all five ISO 7637-2 pulses.
Availability
SMBJ100CAH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC power conditioning, and smart infrastructure metering requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ100CAH 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, and rectifiers, with global distribution and AEC-Q101-compliant production lines.
The SMBJH series was engineered specifically for automotive and harsh-environment industrial applications demanding high-reliability transient suppression, full ISO 7637-2 compliance, and extended temperature operation up to +150 °C.
FAQ
What does the "CAH" suffix indicate in SMBJ100CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability construction (H). Unlike unidirectional variants (e.g., SMBJ100H), SMBJ100CAH provides symmetrical clamping in both polarities-critical for protecting AC-coupled or differential signal lines like CAN or RS-485 without polarity concerns. This is confirmed in the datasheet's "Devices for Bipolar Applications" section.
Is SMBJ100CAH suitable for protecting a 100 V DC power rail?
Yes, SMBJ100CAH is explicitly rated for 100 V working stand-off voltage (VWM), meaning it remains non-conductive below 100 V and activates only during overvoltage events. Its 111–123 V breakdown range and 162 V clamping voltage ensure safe operation on nominal 100 V systems such as industrial 24/48/100 V DC distribution networks, provided layout minimizes parasitic inductance to preserve clamping speed.
How does SMBJ100CAH meet ISO 7637-2 requirements?
SMBJ100CAH is validated for all five ISO 7637-2 test pulses: Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling and ESD). This is stated directly in the FEATURES section and supported by its 600 W peak pulse rating, fast <1 ps response, and low clamping voltage-enabling it to absorb energy without exceeding safe voltage thresholds for downstream ICs in automotive ECUs.
What is the maximum peak impulse current (IPP) for SMBJ100CAH?
The maximum peak impulse current (IPP) for SMBJ100CAH is 3.8 A under the standard 10/1000 µs double-exponential surge waveform. This value is derived from the clamping voltage (VC = 162 V) and peak pulse power (PPK = 600 W), calculated as IPP = PPK / VC. The datasheet confirms this in the Electrical Specifications table on page 3, listing IPP = 3.8 A for SMBJ100AH (bidirectional variant).
Does SMBJ100CAH require special PCB layout considerations?
Yes-effective transient suppression demands minimal trace inductance between SMBJ100CAH and the protected node. Recommended practices include placing SMBJ100CAH directly across the protected line and reference plane (e.g., CAN_H to CAN_L or VCC to GND), using short wide traces, and avoiding vias in the clamp path. The DO-214AA (SMB) package's low-inductance structure supports this, but layout directly impacts clamping performance, especially for sub-nanosecond response.
SMBJ100CAH 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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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)
SMBJ100CAH FAQ
1.How can I place an order for SMBJ100CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ100CAH 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 SMBJ100CAH reliable?
The price and inventory of SMBJ100CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ100CAH is usually 5 days.
3.What payment methods are accepted for SMBJ100CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ100CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ100CAH?
SMBJ100CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ100CAH 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 SMBJ100CAH?
For technical support, including SMBJ100CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ100CAH requirements.
6.How does Aetrix verify that SMBJ100CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ100CAH 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 SMBJ100CAH meets industry standards.
7.What is the process for return or replacement of SMBJ100CAH?
All SMBJ100CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ100CAH, 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 SMBJ100CAH part is unused and in its original packaging.
Return procedure for SMBJ100CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ100CAH Tags
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