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Vishay General Semiconductor - Diodes Division SMBJ120AHM3_A/I
- Part No.:
- SMBJ120AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120AHM3_A/I.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,373
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Product details
Overview
SMBJ120AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 120 V standoff voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 193 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps transients to ≤193 V at rated surge. It is used in industrial motor drives to protect gate drivers from inductive switching spikes.
For engineers reviewing the SMBJ120AHM3_A/I datasheet, SMBJ120AHM3_A/I pinout, SMBJ120AHM3_A/I application, or SMBJ120AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), clamping behavior, and direct alternative part comparisons - all confirmed against Vishay Document #88392 (Rev. 09-Jan-2024).
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its VBR threshold. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), while the 600 W peak pulse power rating (10/1000 µs) supports repetitive transient suppression in high-noise environments.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it meets J-STD-020 MSL Level 1 and withstands peak reflow temperatures up to 260 °C. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification - critical for automotive body electronics and industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection window. |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | ≤193 V at 193 A - clamped voltage during full-rated surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling per 10/1000 µs waveform; enables single-event suppression of high-energy transients. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at standoff voltage; minimizes standby power loss in battery-backed systems. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard pad layout; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood or enclosed industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-band marked end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VREV > VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable suppression of IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules, lighting drivers, and infotainment power supplies. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A Tier 1 material declaration requirements for green manufacturing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., <1 ns rise time), improving protection margin for sensitive ICs. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of MOSFET gate drivers against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate and source to clamp negative-going transients below -20 V. Use Value: Prevents gate oxide rupture in 600 V Si MOSFETs by limiting transient excursions to ≤193 V with sub-1 ns response. |
Use Scenario: Input protection for LIN bus transceivers and LED driver ICs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators and CAN/LIN interface ICs. Use Value: Maintains VWM = 120 V margin above 14 V nominal + 25 V load dump (ISO 7637-2 Pulse 5a), ensuring no false triggering. |
| Telecom Power Supplies | Industrial PLC I/O Modules |
Use Scenario: Secondary-side DC output protection in AC/DC adapters powering base station controllers and remote radio units. IC Role / Device Role / Timing Role: Final-stage transient suppressor on +48 V or +24 V distribution rails feeding FPGA and PHY ICs. Use Value: Clamps 10/1000 µs surges to ≤193 V while sustaining 5.0 W steady-state dissipation - compatible with forced-air-cooled telecom chassis. |
Use Scenario: Analog input channel protection in modular PLCs interfacing with 4–20 mA sensors and thermocouples. IC Role / Device Role / Timing Role: Front-end TVS on isolated analog front-end (AFE) inputs to absorb ESD and field-wiring transients. Use Value: Achieves <1.0 µA leakage at 120 V, preserving measurement accuracy in 24-bit delta-sigma ADCs without offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120AHE3_A/I | Same electrical specs, but RoHS-compliant without halogen-free certification; no AEC-Q101 qualification. | Suitable for commercial/industrial use where automotive qualification is not required. | Select when halogen-free content is not mandated and AEC-Q101 is unnecessary. |
| SMCJ120A-HM3_A/I | Same VWM/VBR/VC ratings, but SMC (DO-214AB) package - larger footprint, higher RθJA (60 °C/W), 1500 W PPPM. | Better suited for high-power industrial systems requiring higher surge margin and lower thermal resistance. | Choose when board space allows larger package and 1500 W surge rating is needed for harsher environments. |
Compared with SMBJ120AHM3_A/I, SMBJ120AHE3_A/I offers identical protection performance without halogen-free or automotive qualification, while SMCJ120A-HM3_A/I trades compact size for higher surge capacity and improved thermal performance in space-tolerant designs.
Availability
SMBJ120AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMBJ120AHM3_A/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom systems, with design focus on fast response, low clamping, and robust packaging for automated SMT assembly.
FAQ
What is the maximum clamping voltage of SMBJ120AHM3_A/I at its rated peak pulse current?
The SMBJ120AHM3_A/I has a maximum clamping voltage (VC) of 193 V when subjected to its rated peak pulse current (IPPM) of 193 A under the standard 10/1000 µs waveform. This value is measured per Vishay Document #88392 and defines the upper voltage limit imposed on the protected circuit during full-rated surge events. The SMBJ120AHM3_A/I maintains this clamping performance across its specified operating temperature range.
Is SMBJ120AHM3_A/I qualified for automotive applications?
Yes, SMBJ120AHM3_A/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and Vishay documentation (Document #88392, Rev. 09-Jan-2024). This qualification validates its reliability for automotive use cases including body electronics, lighting control, and power distribution modules. The SMBJ120AHM3_A/I undergoes stress testing for temperature cycling, humidity, and mechanical shock per AEC-Q101 requirements.
What does the "HM3" suffix indicate in SMBJ120AHM3_A/I?
The "HM3" suffix in SMBJ120AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, not halogen-free) versions. The SMBJ120AHM3_A/I meets IPC-1752A material declarations and JEDEC J-STD-020 MSL Level 1 reflow standards, supporting green manufacturing and automotive-grade reliability.
Can SMBJ120AHM3_A/I be used in bidirectional protection circuits?
No, SMBJ120AHM3_A/I is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMBJ120CA). Using SMBJ120AHM3_A/I in bidirectional applications would result in forward conduction during positive transients, potentially damaging the device or failing to protect the circuit. Always verify polarity alignment before integrating SMBJ120AHM3_A/I.
What is the thermal resistance of SMBJ120AHM3_A/I, and how does it affect derating?
The SMBJ120AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" copper pads. This value directly governs power derating: at 75 °C ambient, its maximum allowable steady-state power drops to ~2.5 W (per Fig. 2 in Document #88392). Engineers must apply this derating when designing for continuous dissipation or high-duty-cycle surge environments involving SMBJ120AHM3_A/I.
SMBJ120AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ120AHM3_A/I FAQ
1.How can I place an order for SMBJ120AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120AHM3_A/I 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 SMBJ120AHM3_A/I reliable?
The price and inventory of SMBJ120AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ120AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120AHM3_A/I?
SMBJ120AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120AHM3_A/I 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 SMBJ120AHM3_A/I?
For technical support, including SMBJ120AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ120AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ120AHM3_A/I 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 SMBJ120AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ120AHM3_A/I?
All SMBJ120AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120AHM3_A/I, 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 SMBJ120AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ120AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120AHM3_A/I Tags
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