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Vishay General Semiconductor - Diodes Division SMBJ100A-E3/5B
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- Part No.:
- SMBJ100A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ100A-E3/5B.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,460
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Product details
Overview
SMBJ100A-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.
For engineers reviewing the SMBJ100A-E3/5B datasheet, SMBJ100A-E3/5B pinout, SMBJ100A-E3/5B application, or SMBJ100A-E3/5B equivalent, this device is selected for high-reliability surge suppression in automotive ECUs, industrial I/O modules, and telecom power interfaces where fast response (<1 ps), low clamping ratio, and AEC-Q101-compliant variants are critical.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 100 V), then avalanches sharply at VBR to clamp transients within nanoseconds. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance (Rdyn ≈ 18 Ω derived from ΔVC/ΔIPPM).
Thermal design relies on its RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and TJ(max) = 150 °C, enabling sustained operation in ambient temperatures up to +85 °C when derated per Fig. 2. The E3 suffix confirms RoHS-compliant, commercial-grade construction with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (min/max) | 111 V / 123 V at 1 mA - Ensures reliable triggering above system nominal voltage while avoiding false trips. |
| VC @ IPPM | 162 V at 3.7 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to <162 V. |
| PPPM | 600 W - Peak transient energy absorption capability; supports IEC 61000-4-5 Level 4 (4 kV) testing. |
| IPPM | 3.7 A - Peak pulse current corresponding to VC; used with PCB trace inductance to estimate overshoot. |
| TJ(max) | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 5 mm × 5 mm copper pads; guides heatsinking needs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); compliant with IPC-7351B SOIC127X94N.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected line (e.g., +12 V rail); must be routed with low-inductance path to ground reference. |
| Cathode | Current exit terminal; marked by band | Connected to system ground or low-impedance return plane; determines unidirectional clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to 4 kV in industrial and automotive applications. |
| Clamping voltage ≤162 V at 3.7 A | Provides 62% clamping ratio (VC/VBR(min)), limiting transient overvoltage stress on downstream 100 V-rated MOSFETs or controllers. |
| Response time <1 ps | Ensures protection activation before ESD or lightning-induced transients propagate into sensitive analog or digital circuitry. |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| RoHS-compliant, matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 for long-term reliability. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply rail against load dump (ISO 7637-2 Pulse 5a, up to 120 V/200 ms) and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping TVS placed directly at power entry point before DC/DC converter input. Use Value: Limits rail voltage to ≤162 V during 100 A/100 ms surges, preventing damage to 36 V-rated buck controller ICs. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced transients (IEC 61000-4-4 EFT, 4 kV). IC Role / Device Role / Timing Role: Unidirectional clamp between input terminal and common ground, sized for 10/1000 µs threat profile. Use Value: Maintains input logic threshold integrity by clamping spikes to <162 V, ensuring no false triggering of optocoupler or Schmitt trigger inputs. |
| Telecom Power Feeding Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Safeguards PoE-powered equipment front-end from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side DC output, coordinated with secondary TVS on PD side. Use Value: Absorbs 600 W transient energy without thermal runaway, preserving IEEE 802.3af/at compliance during lightning coupling events. |
Use Scenario: Suppresses commutation spikes from brushed DC motor back-EMF on 24 V control board power rail. IC Role / Device Role / Timing Role: Fast-acting shunt device across motor driver H-bridge supply pins. Use Value: Clamps 100–200 V inductive kickback within 1 ns, protecting gate drivers and MCU I/O from latch-up or oxide rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA-E3/5B | Bidirectional variant; symmetric VBR = 111–123 V; no polarity marking; higher capacitance (≈150 pF vs. 120 pF). | Required for AC-coupled signal lines (e.g., RS-485, CAN bus) or dual-polarity rails where reverse voltage may occur. | Select only if bidirectional clamping is needed; not drop-in for unidirectional DC rail protection. |
| SMCJ100A-E3/57T | Same VWM/VBR/VC, but larger SMC (DO-214AB) package; 1500 W PPPM; RθJA = 40 °C/W. | Suitable for higher-energy threats (e.g., IEC 61000-4-5 Level 5, 6 kV) or systems requiring extended surge endurance. | Choose when 600 W is insufficient; requires PCB layout change due to larger footprint and different pad geometry. |
Compared with SMBJ100A-E3/5B, the SMBJ100CA-E3/5B offers polarity-agnostic protection at the cost of higher junction capacitance, while the SMCJ100A-E3/57T delivers 2.5× higher surge capacity in a physically incompatible package-neither is pin-compatible, and both require schematic and layout validation.
Availability
SMBJ100A-E3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power interface designs requiring stable component supply with full traceability and commercial-grade reliability.
Supply support for SMBJ100A-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, TVS devices, and optoelectronics with emphasis on ruggedness, precision, and automotive qualification.
The SMBJ series is engineered for high-speed transient suppression in harsh environments, targeting automotive, industrial, and communications systems where reliability under repetitive surge stress is mandatory.
FAQ
What is the maximum clamping voltage of SMBJ100A-E3/5B under a 10/1000 µs surge?
The SMBJ100A-E3/5B has a maximum clamping voltage (VC) of 162 V at 3.7 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuits during surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is SMBJ100A-E3/5B suitable for automotive applications?
SMBJ100A-E3/5B is rated for commercial temperature range (–55 °C to +150 °C) and RoHS-compliant, but it is not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ100AHE3_B variant (with HE3 suffix), which carries AEC-Q101 qualification. The SMBJ100A-E3/5B itself is appropriate for non-safety-critical consumer or industrial applications where automotive qualification is not mandated.
How does the SMBJ100A-E3/5B differ from the SMBJ100CA-E3/5B?
The SMBJ100A-E3/5B is unidirectional with cathode band marking and optimized for DC rail protection, whereas the SMBJ100CA-E3/5B is bidirectional with symmetric breakdown behavior and no polarity marking-intended for AC or dual-polarity signal lines. Their VBR, VC, and PPPM are identical, but the CA version exhibits higher junction capacitance (≈150 pF vs. 120 pF), affecting high-frequency signal integrity.
What is the thermal resistance of SMBJ100A-E3/5B, and how does it affect layout?
The SMBJ100A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means each watt of dissipated power raises the junction temperature by 100 °C above ambient. To maintain TJ ≤150 °C at 85 °C ambient, average power must stay below 0.65 W-requiring adequate copper area and minimal trace length to minimize thermal impedance in the SMBJ100A-E3/5B layout.
Can SMBJ100A-E3/5B replace SMAJ100A in an existing design?
No-SMBJ100A-E3/5B uses the SMB (DO-214AA) package (4.57 mm × 3.94 mm), while SMAJ100A uses the smaller SMA (DO-214AC) package (4.57 mm × 2.62 mm). Though both have identical electrical specs, the SMBJ100A-E3/5B requires larger PCB pads and different stencil aperture. Direct replacement would cause solder joint reliability issues or tombstoning unless the footprint is revised to match DO-214AA mechanical dimensions.
SMBJ100A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
SMBJ100A-E3/5B FAQ
1.How can I place an order for SMBJ100A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ100A-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 SMBJ100A-E3/5B reliable?
The price and inventory of SMBJ100A-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 SMBJ100A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ100A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ100A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ100A-E3/5B?
SMBJ100A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ100A-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 SMBJ100A-E3/5B?
For technical support, including SMBJ100A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ100A-E3/5B requirements.
6.How does Aetrix verify that SMBJ100A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ100A-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 SMBJ100A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ100A-E3/5B?
All SMBJ100A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ100A-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 SMBJ100A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ100A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ100A-E3/5B Tags
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