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Vishay General Semiconductor - Diodes Division SMB10J20A-M3/5B
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- Part No.:
- SMB10J20A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20A-M3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
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Product details
Overview
SMB10J20A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR at 1 mA), 32.4 V clamping voltage (VC) at 30.9 A peak pulse current (IPPM), and 1000 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMB10J20A-M3/5B datasheet, SMB10J20A-M3/5B pinout, SMB10J20A-M3/5B application, or SMB10J20A-M3/5B equivalent, key selection criteria include clamping performance under 30.9 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 20 V), but triggers into low-impedance conduction when transient voltage exceeds its 22.2–24.5 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns), while low incremental surge resistance enables effective energy diversion without thermal runaway.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 72 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm pads) and 20 °C/W (junction-to-lead), supporting reliable operation in under-hood automotive environments and industrial control cabinets where ambient temperatures exceed 85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - Maximum continuous reverse voltage before significant leakage; defines maximum safe DC operating rail voltage. |
| VBR (Breakdown Voltage) | 22.2–24.5 V at 1 mA - Confirmed triggering threshold range; ensures robust margin above 20 V system rail. |
| VC (Clamping Voltage) | 32.4 V at 30.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1000 W - Energy-handling capacity per IEC 61000-4-5 Level 4 surge; supports 4 kV line-to-ground transients. |
| IPPM (Peak Pulse Current) | 30.9 A - Maximum non-repetitive surge current it can safely clamp; determines minimum series impedance required. |
| TJ max. | +150 °C - Enables use in high-temperature locations such as engine control units and motor drive enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential node; completes shunt path during overvoltage events. |
| Cathode (marked with band) | High-side input terminal | Connected to protected line (e.g., 20 V rail); conducts when voltage exceeds VBR, diverting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional polarity with cathode band | Enables precise placement in DC-biased circuits; prevents reverse conduction during normal operation. |
| 1000 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 surges up to 4 kV without degradation. |
| AEC-Q101 qualified (HM3/HE3 variants) | Validated for automotive powertrain and body electronics applications requiring long-term reliability. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for global OEMs and industrial equipment manufacturers. |
| Low thermal resistance (RθJL = 20 °C/W) | Supports efficient heat transfer to PCB copper, enabling sustained operation after repeated surges. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤32.4 V, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (e.g., RS-485) in PLC modules. IC Role / Device Role / Timing Role: Bidirectional or unidirectional surge limiter on signal traces adjacent to field wiring. Use Value: Clamps induced lightning surges to <33 V, preserving ADC accuracy and isolator integrity. |
| DC-DC Converter Input Stage | Consumer Appliance Motor Drive Control |
Use Scenario: Front-end protection for buck/boost converters in solar charge controllers and UPS systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input capacitor and controller IC. Use Value: Absorbs 1000 W surges without failure, maintaining converter uptime during grid switching transients. | Use Scenario: Suppressing commutation spikes on H-bridge gate drivers in washing machine and HVAC fan motors. IC Role / Device Role / Timing Role: Snubber-connected TVS across motor terminals or driver supply rails. Use Value: Prevents false triggering of gate drivers and latch-up in logic-level MOSFETs during inductive kickback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-M3/5B | Same VWM (20 V), identical SMB package, but lower PPPM = 600 W and VC = 32.4 V at 18.5 A. | Lower surge handling; suitable only for sub-2 kV IEC 61000-4-5 environments. | Select SMBJ20A-M3/5B only when cost sensitivity outweighs need for full 1000 W immunity. |
| SMCJ20A-M3/5B | Same VWM/VBR/VC, but larger SMC (DO-214AB) package; PPPM = 1500 W, IPPM = 46.5 A. | Higher power rating and thermal mass; requires larger PCB footprint and different pad layout. | Choose SMCJ20A-M3/5B when system-level surge testing exceeds 4 kV or repeated surge duty cycle is high. |
Compared with SMBJ20A-M3/5B and SMCJ20A-M3/5B, SMB10J20A-M3/5B delivers optimal balance of 1000 W surge capability, SMB footprint compatibility, and AEC-Q101 readiness-making it preferred for space-constrained automotive and industrial designs requiring validated reliability.
Availability
SMB10J20A-M3/5B is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interface protection, and DC-DC converter front-end surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 traceability.
Supply support for SMB10J20A-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, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive-grade validation.
The SMB10JxxA series belongs to Vishay's TRANSZORB® high-power TVS platform, engineered specifically for demanding transient suppression in automotive, industrial, and telecom infrastructure where compact size and 1000 W surge immunity are critical.
FAQ
What is the clamping voltage of SMB10J20A-M3/5B at its rated peak pulse current?
The SMB10J20A-M3/5B has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated 30.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components experience no more than 32.4 V during worst-case surge events, provided the device is mounted on the recommended 5.0 mm × 5.0 mm copper pads.
Is SMB10J20A-M3/5B qualified for automotive applications?
Yes, SMB10J20A-M3/5B is halogen-free and RoHS-compliant (M3 suffix), and it belongs to the AEC-Q101-qualified SMB10JxxA family. While the M3 suffix itself denotes commercial-grade halogen-free construction, Vishay explicitly qualifies the SMB10J20A-HM3 variant for automotive use. For full AEC-Q101 compliance, specify SMB10J20A-HM3_X (e.g., HM3_A) - the SMB10J20A-M3/5B shares identical electrical and thermal characteristics but is typically supplied in commercial-grade traceability.
What does the "/5B" in SMB10J20A-M3/5B indicate?
The "/5B" suffix in SMB10J20A-M3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume automated SMT assembly and is compatible with standard pick-and-place equipment. The "M3" prefix confirms halogen-free, RoHS-compliant construction, while the absence of "H" (e.g., HM3) indicates commercial-grade rather than automotive-grade traceability documentation.
How does SMB10J20A-M3/5B differ from SMBJ20A-M3/5B?
SMB10J20A-M3/5B offers 1000 W peak pulse power (10/1000 µs) versus 600 W for SMBJ20A-M3/5B, achieved via optimized chip geometry and thermal design. Both share identical VWM (20 V), VBR (22.2–24.5 V), and VC (32.4 V), but SMB10J20A-M3/5B sustains higher surge current (30.9 A vs. 18.5 A). The SMB10J20A-M3/5B is also part of Vishay's higher-power TRANSZORB® generation, with tighter VBR tolerance and improved surge life cycling.
What is the maximum operating temperature for SMB10J20A-M3/5B?
The SMB10J20A-M3/5B has a maximum junction temperature (TJ) rating of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. Its thermal resistance is 72 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm pads) and 20 °C/W (junction-to-lead), enabling reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures reach 105 °C - provided PCB copper area and airflow meet Vishay's layout recommendations.
SMB10J20A-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 30.9A
- Power - Peak Pulse:
- 1000W (1kW)
- 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)
SMB10J20A-M3/5B FAQ
1.How can I place an order for SMB10J20A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20A-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 SMB10J20A-M3/5B reliable?
The price and inventory of SMB10J20A-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 SMB10J20A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J20A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20A-M3/5B?
SMB10J20A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20A-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 SMB10J20A-M3/5B?
For technical support, including SMB10J20A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20A-M3/5B requirements.
6.How does Aetrix verify that SMB10J20A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J20A-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 SMB10J20A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J20A-M3/5B?
All SMB10J20A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20A-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 SMB10J20A-M3/5B part is unused and in its original packaging.
Return procedure for SMB10J20A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20A-M3/5B Tags
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