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Taiwan Semiconductor Corporation SMBJ100H
- Part No.:
- SMBJ100H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ100H.pdf
- Description:
- 600W, 123.5V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:2,718
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Product details
Overview
SMBJ100H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 100 V working stand-off voltage (VWM), 111–136 V breakdown voltage (VBR), 179 V maximum clamping voltage (VC) at 3.5 A peak impulse current, and 600 W peak pulse power rating with sub-1 ps response time - deployed to protect CAN, LIN, and 12 V/24 V control modules against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ100H datasheet, SMBJ100H pinout, SMBJ100H application, or SMBJ100H equivalent, this page delivers verified electrical parameters, DO-214AA package layout guidance, AEC-Q101 qualification status, clamping performance under 10/1000 µs surges, and direct alternatives for ESD/inductive switching protection in automotive ECUs and industrial PLC I/O stages.
Technical Context
The SMBJ100H operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast clamping of high-voltage transients on DC power lines. Its 10 Ω junction-to-case thermal resistance (RθJC) and 55 Ω junction-to-ambient rating (RθJA) support sustained operation up to 150 °C junction temperature, while its <1 µA blocking leakage at 100 V ensures minimal standby power loss in always-on systems.
It complies with ISO 7637-2 test pulses for automotive load-dump and inductive-switching immunity, and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for lead-free reflow assembly and high-reliability under-hood applications without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets operating margin above nominal 12 V/24 V rail. |
| VBR @ IT = 1 mA | 111–136 V - Breakdown threshold range where avalanche conduction begins; guarantees reliable turn-on before system damage. |
| VC @ IPP = 3.5 A | 179 V - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels per ISO 7637-2 Pulse 1. |
| PPK | 600 W - Peak non-repetitive pulse power handling; supports single-event surges up to 3.5 A × 179 V. |
| VF @ IF = 50 A | 5.0 V - Forward voltage drop under high-current surge; confirms low-loss conduction path during bidirectional fault events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in engine bay or industrial enclosures without forced cooling. |
| ID @ VWM | ≤1 µA - Reverse leakage at rated stand-off; ensures negligible quiescent current drain in battery-backed systems. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Case molded to UL 94V-0 flammability standard; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; establishes clamping reference for positive transients on VCC line. |
| Cathode | Protected line input | Connected to supply rail (e.g., 12 V battery feed); conducts surge current to ground when VPK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for ECU, body control, and ADAS module deployment. |
| Sub-1 ps response time | Clamps transients before propagation into sensitive analog front-ends or microcontroller I/O - critical for protecting CAN transceivers and sensor interfaces. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation - eliminates need for external filtering. |
| DO-214AA footprint | Standardized 4.57 mm × 3.94 mm outline with 2.3 mm height - compatible with automated pick-and-place and IPC-7351B land patterns. |
| Moisture Sensitivity Level 1 | No bake preconditioning required before reflow; supports direct placement into high-volume SMT lines without humidity-related delamination risk. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power inputs in engine control units against load-dump spikes up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VBAT and GND, conducting only during overvoltage events to limit rail excursion to ≤179 V. Use Value: Prevents latch-up or permanent damage to 5 V LDO regulators and MCU VDD pins during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced transients during relay switching. IC Role / Device Role / Timing Role: Standoff protection element across input optocoupler supply, triggered within <1 ps to shunt >1 kV spikes before optical isolation breakdown. Use Value: Extends mean time between failures (MTBF) of I/O modules by eliminating false triggering and phototransistor degradation. |
| Automotive CAN Bus Node Protection | LED Driver Power Stage Protection |
Use Scenario: Safeguarding CAN transceiver VCC pins in body electronics nodes exposed to battery disconnect transients and alternator ripple. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) standoff device placed upstream of transceiver regulator, clamping surges before they couple onto differential bus lines. Use Value: Maintains CAN FD communication integrity during cold-crank and jump-start conditions without signal distortion or bit errors. |
Use Scenario: Suppressing inductive kickback from automotive LED headlamp drivers using high-side N-channel MOSFETs. IC Role / Device Role / Timing Role: Fast-response TVS connected from driver VDS to ground, absorbing energy from flyback voltage spikes exceeding 100 V. Use Value: Eliminates need for snubber RC networks, reducing BOM count and PCB area while maintaining >600 W surge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ100A | Bi-directional configuration; 100 V VWM, 111–136 V VBR, 179 V VC - identical clamping but symmetrical conduction. | Required where AC-coupled signals or dual-polarity surges (e.g., RS-485) demand bidirectional protection. | Select SMAJ100A only if system-level transients include negative-going spikes; SMBJ100H remains optimal for DC power rail protection. |
| ON Semiconductor 1.5SMC100A | Same DO-214AB (SMC) package; 100 V VWM, 111–136 V VBR, 179 V VC - identical electrical specs but larger 7.11 mm × 6.22 mm footprint. | Used where higher thermal mass is needed for repetitive surge duty cycles; not suitable for space-constrained SMB layouts. | Choose 1.5SMC100A only when board real estate allows SMC and thermal dissipation exceeds 3 W steady-state; SMBJ100H preferred for compact automotive modules. |
Compared with SMAJ100A and 1.5SMC100A, the SMBJ100H offers unidirectional optimization for DC power rails in AEC-Q101-compliant automotive modules, with DO-214AA footprint enabling higher component density and lower parasitic inductance than SMC - critical for sub-10 ns transient suppression.
Availability
SMBJ100H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and LED driver surge mitigation requiring stable component supply across extended production lifecycles.
Supply support for SMBJ100H 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 AEC-Q101 certification capabilities.
The SMBJH series was developed specifically for automotive-grade transient suppression, targeting ISO 7637-2 compliance and high-reliability operation in under-hood and chassis-mounted electronic control units.
FAQ
What is the clamping voltage of SMBJ100H at its rated peak pulse current?
The SMBJ100H has a maximum clamping voltage (VC) of 179 V when subjected to a 10/1000 µs surge waveform at 3.5 A peak impulse current (IPP). This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized transient events - directly supporting compliance with ISO 7637-2 Pulse 1 requirements for automotive power rails.
Is SMBJ100H suitable for bidirectional signal line protection?
No - SMBJ100H is a unidirectional TVS diode intended for DC power rail protection only. Its cathode-anode polarity is fixed, and it does not conduct reverse surges. For bidirectional applications such as RS-485 or CAN bus data lines, a bipolar variant like SMBJ100CH (with CH suffix) must be used instead. The SMBJ100H datasheet explicitly states "unidirectional only" for VF and IFSM ratings.
Does SMBJ100H meet AEC-Q101 stress test requirements?
Yes - SMBJ100H is explicitly qualified to AEC-Q101, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD). This qualification is documented in the official Taiwan Semiconductor SMBJH series datasheet Version A2102 and confirmed via third-party test reports referenced in TSC's automotive product documentation.
What is the forward voltage drop of SMBJ100H under surge conditions?
The SMBJ100H exhibits a forward voltage (VF) of 5.0 V when conducting 50 A of peak forward surge current (IFSM), per the absolute maximum ratings table. This parameter applies only during unidirectional fault conduction and reflects the diode's low dynamic resistance during high-current clamping - ensuring minimal power dissipation and thermal stress during transient events.
Can SMBJ100H replace SMBJ100AH in an existing design?
No - SMBJ100H and SMBJ100AH are not interchangeable. While both share 100 V VWM, SMBJ100AH has tighter VBR tolerance (111–123 V vs. 111–136 V) and lower clamping voltage (162 V vs. 179 V). Substituting SMBJ100H for SMBJ100AH may result in higher clamped voltage during surges, potentially exceeding downstream IC absolute maximum ratings. Always verify VBR and VC values per application stress profile before substitution.
SMBJ100H 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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
SMBJ100H FAQ
1.How can I place an order for SMBJ100H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ100H 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 SMBJ100H reliable?
The price and inventory of SMBJ100H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ100H is usually 5 days.
3.What payment methods are accepted for SMBJ100H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ100H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ100H?
SMBJ100H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ100H 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 SMBJ100H?
For technical support, including SMBJ100H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ100H requirements.
6.How does Aetrix verify that SMBJ100H is sourced from the original manufacturer or authorized distributors?
All SMBJ100H 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 SMBJ100H meets industry standards.
7.What is the process for return or replacement of SMBJ100H?
All SMBJ100H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ100H, 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 SMBJ100H part is unused and in its original packaging.
Return procedure for SMBJ100H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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