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Vishay General Semiconductor - Diodes Division SMBJ100-E3/5B
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- Part No.:
- SMBJ100-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ100-E3/5B.pdf
- Description:
- TVS DIODE 100VWM 179VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,518
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Product details
Overview
SMBJ100-E3/5B 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 100 V stand-off voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 3.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the SMBJ100-E3/5B datasheet, SMBJ100-E3/5B pinout, SMBJ100-E3/5B application, or SMBJ100-E3/5B equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal derating above 25 °C, unidirectional polarity alignment with DC rail orientation, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but triggers avalanche conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤162 V during 3.7 A surges. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for single-polarity DC systems, SMBJ100-E3/5B requires cathode-band alignment toward the positive rail. It meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 100 A non-repetitive forward surge (8.3 ms half-sine), and exhibits +0.107 %/°C VBR temperature coefficient - critical for thermal stability in enclosed enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 100 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; sets upper limit for protected circuit's operating voltage. |
| VBR (Breakdown) | 111–123 V at 1 mA - Guaranteed avalanche onset range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping) | 162 V at IPPM = 3.7 A - Peak voltage seen by downstream circuit during standardized 10/1000 µs surge; must be below IC's absolute max rating. |
| PPPM | 600 W - Peak transient energy absorption capability with 10/1000 µs waveform; determines survivability against lightning-induced or inductive-switching transients. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on minimal pad layout; dictates power derating above 25 °C ambient (e.g., 3.3 W at 85 °C). |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); validates robustness against accidental DC short-circuit events or load dump pulses. |
| Polarity | Unidirectional - Cathode-banded end connects to positive rail; blocks reverse conduction, enabling DC rail protection without leakage path. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 molding compound. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), cathode band marked on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side connection | Connects to ground or negative rail; carries full surge current during clamping; requires low-inductance PCB trace routing. |
| Cathode (banded end) | High-side connection | Connects to protected positive rail; polarity-sensitive - reversal causes permanent forward conduction and failure. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 (4 kV line-earth) surges on 24–48 V DC systems without external heat sinking. |
| 162 V clamping at 3.7 A | Provides ≥20 % margin below typical 200 V absolute max rating of industrial-grade MOSFETs and gate drivers. |
| Glass-passivated junction | Ensures stable VBR over 1000+ surge cycles and prevents parameter drift in humid or high-bias-stress environments. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow profiles without popcorn cracking or delamination - no pre-bake required. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for high-speed logic interfaces. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against inductive kickback from relay coils and contactor switching in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt clamping device placed directly across bus input terminals, triggered within <1 ns to clamp transients to ≤162 V. Use Value: Prevents latch-up or gate oxide rupture in downstream buck controllers and isolated gate drivers during repetitive 600 V/10 A switching events. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced common-mode surges on distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, clamping positive transients while blocking reverse conduction on negative rail. Use Value: Maintains system uptime by absorbing 600 W surges without degradation, meeting Telcordia GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Control Units | Consumer Appliance Power Inputs |
|
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump pulses (ISO 7637-2 Pulse 5a) in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary fuse and LC filter, providing final clamping at point-of-load. Use Value: Survives 100 A/40 ms load dump events with <5 % VBR shift after 1000 cycles - validated per AEC-Q101 (HE3 variant). |
Use Scenario: AC-DC adapter input protection in smart home hubs, guarding against EFT bursts (IEC 61000-4-4) and capacitor discharge transients. IC Role / Device Role / Timing Role: First-line defense on secondary-side 12–24 V DC output, mounted adjacent to connector entry point. Use Value: Limits transient propagation to USB-C PD controllers and Wi-Fi SoCs, reducing field return rates linked to ESD-induced firmware lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct drop-in replacement for SMBJ100-E3/5B when halogen-free materials are required. |
| SAC100 | Same VWM/VBR/VC ratings but in smaller SOD-123FL package; lower PPPM (400 W) and higher RθJA (150 °C/W). | Limited to lower-energy transients and lower ambient temperatures; unsuitable for industrial 600 W surge duty. | Consider only for space-constrained consumer designs with verified <400 W surge exposure and <60 °C ambient. |
Compared with SMBJ100-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while SAC100 trades surge robustness and thermal margin for footprint reduction - making SMBJ100-E3/5B the preferred choice for industrial and automotive applications demanding full 600 W capability and MSL Level 1 reflow reliability.
Availability
SMBJ100-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMBJ100-E3/5B 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, power efficiency, and automotive qualification.
The SMBJ series targets board-level transient protection in harsh environments, delivering high-power clamping in compact surface-mount packages for industrial, telecom, and automotive power systems.
FAQ
What is the maximum clamping voltage of SMBJ100-E3/5B at its rated peak pulse current?
The SMBJ100-E3/5B has a maximum clamping voltage (VC) of 162 V at its specified peak pulse current (IPPM) of 3.7 A, measured using the standard 10/1000 µs waveform. This value is critical for ensuring downstream components - such as 200 V-rated MOSFETs or gate drivers - remain within their absolute maximum voltage limits during surge events. The SMBJ100-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ100-E3/5B suitable for bidirectional signal line protection?
No, SMBJ100-E3/5B is a unidirectional TVS diode, intended exclusively for DC rail protection where polarity is fixed - the cathode band must connect to the positive side of the protected line. For bidirectional signal lines (e.g., RS-485, CAN), a bidirectional variant such as SMBJ100CA is required. Using SMBJ100-E3/5B on AC or reversible signals would result in forward conduction and device failure during negative excursions.
What is the thermal resistance and how does it affect SMBJ100-E3/5B's power handling?
The SMBJ100-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" copper pads. This means that at 25 °C ambient, its 5.0 W steady-state power dissipation limit drops to approximately 3.3 W at 85 °C ambient. Engineers must apply this derating curve (per Figure 2 in the datasheet) when sizing SMBJ100-E3/5B for applications with elevated ambient temperatures or limited airflow.
Does SMBJ100-E3/5B meet automotive qualification standards?
The base SMBJ100-E3/5B is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ100HE3_B variant (with HE3 suffix), which is fully AEC-Q101 qualified for automotive use. If your design targets automotive body control, infotainment, or ADAS subsystems, specify SMBJ100HE3_B instead of SMBJ100-E3/5B to ensure compliance with stress-test requirements including temperature cycling, humidity bias, and mechanical shock.
How is the polarity marked on SMBJ100-E3/5B, and why does it matter?
SMBJ100-E3/5B uses a cathode band marking on one end of the SMB (DO-214AA) package to indicate the cathode terminal - this end must be connected to the positive side of the protected DC rail. Correct polarity is essential: reverse installation causes the device to conduct continuously under normal operating voltage, leading to thermal runaway and open-circuit failure. The anode (unmarked end) connects to ground or the negative rail, completing the shunt protection path.
SMBJ100-E3/5B 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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- 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 (SMBJ)
SMBJ100-E3/5B FAQ
1.How can I place an order for SMBJ100-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ100-E3/5B 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 SMBJ100-E3/5B reliable?
The price and inventory of SMBJ100-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ100-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ100-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ100-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ100-E3/5B?
SMBJ100-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ100-E3/5B 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 SMBJ100-E3/5B?
For technical support, including SMBJ100-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ100-E3/5B requirements.
6.How does Aetrix verify that SMBJ100-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ100-E3/5B 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 SMBJ100-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ100-E3/5B?
All SMBJ100-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ100-E3/5B, 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 SMBJ100-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ100-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ100-E3/5B Tags
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Diodes Incorporated
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