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Vishay General Semiconductor - Diodes Division SMBJ120HE3/52
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- Part No.:
- SMBJ120HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120HE3/52.pdf
- Description:
- TVS DIODE 120VWM 214VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,919
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Product details
Overview
SMBJ120HE3/52 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 a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 193 A peak pulse current (IPPM), 193 V clamping voltage (VC) at IPPM, and 600 W peak pulse power (10/1000 µs waveform), deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBJ120HE3/52 datasheet, SMBJ120HE3/52 pinout, SMBJ120HE3/52 application, or SMBJ120HE3/52 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal derating above 25 °C ambient, AEC-Q101 qualification status for automotive use cases, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables fast energy diversion during transients.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.108 %/°C VBR temperature coefficient - critical for high-temperature environments like under-hood automotive electronics. Its MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility support high-yield manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit's normal operating range. |
| VBR min/max | 133 V / 147 V at IT = 1 mA - guaranteed breakdown window defining turn-on consistency across production lots. |
| VC @ IPPM | 193 V - clamped voltage during 193 A 10/1000 µs surge; determines worst-case stress on downstream components. |
| PPPM | 600 W - peak transient power it can absorb without failure; validated per IEC 61000-4-5 surge standard waveform. |
| ID @ VWM | <1.0 µA - reverse leakage at stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in enclosed enclosures or near heat-generating components. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 0.220" × 0.155" footprint; compatible with JEDEC J-STD-020 reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), 2-terminal unidirectional configuration. Cathode identified by molded band on body; anode is unmarked end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay thermal derating guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when Vreverse > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients - critical for protecting 150 V-rated MOSFETs and gate drivers. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-induced popcorn failure or delamination. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage parameters across humidity, bias, and thermal stress conditions. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs against inductive kickback from relay coils and contactor switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between +BUS and GND to limit voltage spikes to ≤193 V during 100 ns–1 µs transients. Use Value: Prevents destructive overvoltage on 200 V-rated IGBT gate drivers and isolated DC-DC controllers. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 600 W pulses while maintaining <1 µA leakage at nominal -48 V operation. Use Value: Maintains system uptime by preventing latch-up or burnout in PMBus-controlled POL converters during field surges. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: CAN FD transceiver power rail protection in BCMs subjected to load dump per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional clamp on 12 V supply rail upstream of TJA1057-level transceivers. Use Value: Survives 35 V/200 ms load dump events without parametric shift, ensuring CAN communication continuity. |
Use Scenario: 24 V digital input protection against wiring faults and electrostatic discharge in factory automation I/O modules. IC Role / Device Role / Timing Role: Fast-response TVS on optocoupler input side, clamping transients before they reach microcontroller GPIOs. Use Value: Eliminates false triggering and firmware resets caused by 1 kV EFT bursts per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/52 | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMB package. | Not approved for automotive use; acceptable for industrial/commercial power supplies where qualification is not mandated. | Select SMBJ120A-E3/52 when AEC-Q101 is unnecessary and cost optimization is prioritized. |
| SMCJ120AHE3/A | Larger SMC (DO-214AB) package; higher 1500 W PPPM rating; same VWM/VBR/VC values. | Better thermal performance and higher surge margin; requires larger PCB area and different pad layout. | Choose SMCJ120AHE3/A when system-level surge testing exceeds 600 W or board space allows larger footprint. |
Compared with SMBJ120A-E3/52, the SMBJ120HE3/52 adds automotive qualification without altering electrical behavior; versus SMCJ120AHE3/A, it trades surge capacity for compactness - making SMBJ120HE3/52 optimal for space-constrained AEC-Q101 designs needing precise 600 W protection.
Availability
SMBJ120HE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial PLC I/O cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ120HE3/52 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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ120HE3/52 at its rated peak pulse current?
The SMBJ120HE3/52 has a maximum clamping voltage (VC) of 193 V at its rated peak pulse current (IPPM) of 193 A, measured using the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is critical for ensuring compatibility with downstream components' absolute maximum ratings. The SMBJ120HE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ120HE3/52 qualified for automotive applications?
Yes, SMBJ120HE3/52 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD verification required for automotive electronic components. This qualification confirms its suitability for under-hood and cabin applications such as body control modules and infotainment power rails. The "HE3" suffix explicitly denotes AEC-Q101 compliance in Vishay's ordering nomenclature.
What is the reverse leakage current of SMBJ120HE3/52 at its stand-off voltage?
The SMBJ120HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 120 V stand-off voltage (VWM), tested at 25 °C ambient. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on systems. Leakage remains within specification up to +125 °C junction temperature, supporting reliable operation in thermally demanding environments.
Does SMBJ120HE3/52 have a bidirectional variant?
No, SMBJ120HE3/52 is strictly unidirectional. For bidirectional operation, Vishay offers the SMBJ120CA series (e.g., SMBJ120CAHE3/52), which provides symmetrical clamping in both polarities. The "CA" suffix indicates bidirectional functionality, whereas "A" denotes unidirectional. Electrical parameters differ slightly - notably, bidirectional parts have two VBR values and no forward voltage drop specification.
What PCB pad layout is recommended for optimal thermal performance of SMBJ120HE3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMBJ120HE3/52 to achieve rated power dissipation and thermal derating. This layout reduces thermal resistance (RθJA = 100 °C/W typical) and prevents localized overheating during repetitive surge events. Use internal ground planes and thermal vias beneath pads if board stack-up permits, especially in high-duty-cycle applications.
SMBJ120HE3/52 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:
- 214V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- 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 (SMBJ)
SMBJ120HE3/52 FAQ
1.How can I place an order for SMBJ120HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120HE3/52 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 SMBJ120HE3/52 reliable?
The price and inventory of SMBJ120HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ120HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120HE3/52?
SMBJ120HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120HE3/52 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 SMBJ120HE3/52?
For technical support, including SMBJ120HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120HE3/52 requirements.
6.How does Aetrix verify that SMBJ120HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ120HE3/52 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 SMBJ120HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ120HE3/52?
All SMBJ120HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120HE3/52, 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 SMBJ120HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ120HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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