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Vishay General Semiconductor - Diodes Division SMBJ11A-M3/5B
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- Part No.:
- SMBJ11A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11A-M3/5B.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ11A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 33 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on IC power rails, MOSFET gate drivers, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ11A-M3/5B datasheet, SMBJ11A-M3/5B pinout, SMBJ11A-M3/5B application, or SMBJ11A-M3/5B equivalent, key selection criteria include unidirectional polarity, 18.2 V clamping performance at 33 A, 5.0 µA max reverse leakage at 11 V, 100 °C/W junction-to-ambient thermal resistance, and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 GΩ) below VWM = 11 V; when transient voltage exceeds VBR (min 12.2 V), it avalanches rapidly (<1 ns response) to clamp the line at ≤18.2 V while diverting up to 33 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Thermally, it is rated for TJ = –55 °C to +150 °C, with RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads and RθJL = 20 °C/W to lead. The M3 suffix confirms halogen-free, RoHS-compliant commercial-grade construction meeting JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working margin. |
| VBR @ IT = 1 mA | 12.2–13.5 V - Breakdown onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM = 33 A | 18.2 V - Clamped voltage during 600 W transient; must be below protected device's absolute maximum rating. |
| ID @ VWM | ≤5.0 µA - Reverse leakage at 11 V; negligible power loss and no interference with high-impedance circuits. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports common IEC 61000-4-5 surge test levels. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in hot industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance to ambient on minimal pad layout; informs PCB copper area requirements for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage event. |
| Anode (unbanded end) | Reference node | Typically tied to circuit ground or lower-potential rail; completes shunt path for clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation. |
| 18.2 V clamping voltage at 33 A | Ensures downstream ICs with 20 V absolute maximum rating remain within safe operating limits. |
| Glass passivated junction | Provides stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without pre-baking or special handling. |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance for industrial and telecom OEMs targeting EU/Asia markets. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver ICs and bootstrap FETs against inductive kickback from BLDC motor windings. IC Role / Device Role / Timing Role: Shunt clamping element placed across high-side FET drain-source or gate-source nodes. Use Value: Limits transient voltage to ≤18.2 V, preventing gate oxide rupture and latch-up in 20 V-rated drivers. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, referenced to vehicle chassis. Use Value: Clamps 100 V/50 ms load dump transients to <20 V within nanoseconds, preserving signal integrity and ESD immunity. |
| Telecom Power Supply Inputs | Consumer Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for 12 V DC-DC converters in base station remote radio units. IC Role / Device Role / Timing Role: Primary surge suppression device placed after input fuse and before bulk capacitor. Use Value: Absorbs 600 W surges without failure, maintaining converter uptime during lightning-induced AC-line transients. |
Use Scenario: ESD and surge protection for analog outputs of MEMS pressure sensors in HVAC controllers. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical) placed inline with 0–5 V output signal path. Use Value: Adds <5 µA leakage at 11 V, avoiding gain error in precision 16-bit ADC front-ends while passing IEC 61000-4-2 ±8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable where halogen-free mandate does not apply (e.g., non-EU commercial products). | Select E3 if cost sensitivity outweighs halogen-free requirement; M3 required for automotive or green procurement policies. |
| SMAJ11A-M3 | Lower 400 W PPPM, higher VC = 19.9 V at 25 A, SMA (DO-214AC) package - 2.5 mm shorter body, 0.7 mm lower profile. | Better suited for space-constrained consumer PCBs where 600 W margin is unnecessary. | Choose SMAJ11A-M3 only when board height is critical and surge threat level is ≤IEC 61000-4-5 Level 2 (0.5 kV). |
Compared with SMBJ11A-E3/5B, the M3 variant adds halogen-free compliance without sacrificing electrical performance; versus SMAJ11A-M3, SMBJ11A-M3/5B delivers 50 % higher surge power handling and tighter clamping - essential for industrial-grade reliability where transient energy exceeds 400 W.
Availability
SMBJ11A-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ11A-M3/5B 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 AEC-Q qualification.
The SMBJ series targets robust transient suppression in harsh environments - engineered for industrial automation, telecom infrastructure, and automotive subsystems where failure tolerance and long-term parametric stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ11A-M3/5B under surge conditions?
The SMBJ11A-M3/5B has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 33 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components see no more than 18.2 V during standardized surge events - critical for safeguarding 20 V absolute maximum-rated ICs. The SMBJ11A-M3/5B maintains this clamping performance across its full operating temperature range.
Does SMBJ11A-M3/5B meet automotive qualification standards?
The SMBJ11A-M3/5B itself is a commercial-grade part (M3 suffix) and is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ11AHM3_B/I variant - same electrical specs and SMB package - which carries full AEC-Q101 qualification for automotive use. For non-automotive applications such as industrial controls or telecom, the SMBJ11A-M3/5B provides identical protection performance with halogen-free RoHS compliance.
How does the M3 suffix differ from E3 in SMBJ11A-M3/5B?
The M3 suffix in SMBJ11A-M3/5B denotes halogen-free, RoHS-compliant construction using bromine-free flame retardants in the molding compound, whereas E3 uses RoHS-compliant materials that may contain halogens. Both share identical electrical characteristics, thermal ratings, and mechanical dimensions. The M3 variant satisfies strict environmental mandates (e.g., JEDEC JS709, China RoHS II) where halogen content must be <900 ppm chlorine + bromine combined - a requirement increasingly enforced in automotive and EU industrial procurement.
What is the thermal resistance of SMBJ11A-M3/5B, and how does it affect PCB layout?
SMBJ11A-M3/5B 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 value assumes minimal pad area; increasing copper area reduces RθJA and improves surge endurance. For repeated surge events, designers should allocate ≥250 mm² total copper per terminal and avoid thermal isolation - because exceeding TJ = 150 °C risks parametric shift or catastrophic failure. The SMBJ11A-M3/5B's RθJL = 20 °C/W further supports heat conduction through solder joints.
Can SMBJ11A-M3/5B be used for bidirectional transient protection?
No - SMBJ11A-M3/5B is strictly unidirectional, with cathode marked by a band and intended for protection between a positive rail and ground. For bidirectional applications (e.g., AC lines or differential buses), Vishay specifies the SMBJ11CA-M3/5B variant, which has symmetrical breakdown in both directions and no polarity marking. Using SMBJ11A-M3/5B in reverse-biased configurations risks permanent damage due to lack of reverse avalanche capability. Always match device polarity to circuit topology: SMBJ11A-M3/5B for DC rail-to-ground, SMBJ11CA-M3/5B for AC or floating signal lines.
SMBJ11A-M3/5B 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SMBJ11A-M3/5B FAQ
1.How can I place an order for SMBJ11A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11A-M3/5B 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 SMBJ11A-M3/5B reliable?
The price and inventory of SMBJ11A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ11A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11A-M3/5B?
SMBJ11A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11A-M3/5B 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 SMBJ11A-M3/5B?
For technical support, including SMBJ11A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11A-M3/5B requirements.
6.How does Aetrix verify that SMBJ11A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ11A-M3/5B 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 SMBJ11A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ11A-M3/5B?
All SMBJ11A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11A-M3/5B, 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 SMBJ11A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ11A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11A-M3/5B Tags
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