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Vishay General Semiconductor - Diodes Division SMB10J20HE3/5B
- Part No.:
- SMB10J20HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20HE3/5B.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,805
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Product details
Overview
SMB10J20HE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) 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 (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used in automotive power supply input stages to protect downstream MOSFETs and microcontrollers.
For engineers reviewing the SMB10J20HE3/5B datasheet, SMB10J20HE3/5B pinout, SMB10J20HE3/5B application, or SMB10J20HE3/5B equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, clamping performance under standardized surge conditions, thermal resistance data (RθJA = 72 °C/W), and real-world automotive and industrial protection use cases - all confirmed from Vishay Document #88422.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only when reverse voltage exceeds its breakdown threshold (VBR ≥ 22.2 V). Its low incremental surge resistance enables rapid energy diversion during transients such as ISO 7637-2 Load Dump or IEC 61000-4-5 surges.
It is rated for 1000 W peak pulse power (10/1000 µs), with clamping voltage VC = 32.4 V at IPPM = 30.9 A, ensuring protected circuits remain below safe voltage thresholds. The device uses glass-passivated junction technology and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20 V - Maximum continuous reverse operating voltage before significant leakage; defines maximum DC rail voltage it can guard without conduction. |
| VBR (Breakdown Voltage) | 22.2–24.5 V at IT = 1 mA - Voltage range where device transitions from high-impedance to low-impedance clamping state; ensures reliable triggering above nominal rail. |
| VC (Clamping Voltage) | 32.4 V at IPPM = 30.9 A - Maximum voltage seen by protected circuit during 10/1000 µs surge; critical for ensuring downstream ICs stay within absolute max ratings. |
| PPPM (Peak Pulse Power) | 1000 W (10/1000 µs) - Surge energy-handling capacity; supports robust protection against automotive load dump and inductive switching events. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; determines temperature rise under sustained power dissipation. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; suitable for under-hood and body-control module applications. |
| Package | DO-214AA (SMB) - Surface-mount, low-profile package with matte tin-plated leads; compatible with automated SMT placement and J-STD-002 soldering. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; two terminals - anode and cathode - aligned along axial centerline. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 mechanical robustness requirements. Polarity indicated by single black band denoting cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when VREV > VBR. |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| Uni-directional clamping | Enables integration on positive DC rails without interfering with forward-biased operation; avoids reverse leakage issues common in bi-directional variants. |
| AEC-Q101 qualification | Validates reliability for automotive environments including extended temperature cycling (-55 °C to +150 °C) and humidity exposure - required for engine control and ADAS modules. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Indicates efficient voltage limiting: clamps at only ~45% above breakdown, minimizing overvoltage stress on protected ICs like CAN transceivers or MCU I/Os. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced damage; eliminates pre-bake requirement in high-volume SMT lines. |
| Glass-passivated junction | Provides stable VBR tolerance and long-term parameter stability under thermal stress and humidity - critical for 15+ year automotive service life. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 Pulse 5a (load dump) up to 60 V/100 ms. IC Role / Device Role: Primary overvoltage clamp on main power rail upstream of DC-DC converter and MCU. Use Value: Limits rail voltage to ≤32.4 V during 30.9 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies and microcontrollers. |
Use Scenario: 24 V industrial PLC analog input channel subject to field-wiring induced transients (IEC 61000-4-4 EFT). IC Role / Device Role: First-stage transient suppression before precision op-amp front-end and ADC driver. Use Value: Clamps fast-rising spikes (<1 ns rise time) while adding <1 pF junction capacitance - preserving signal integrity for 20 kHz sensor bandwidth. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V telecom rectifier output feeding PoE midspans, vulnerable to lightning-induced surges on building entry points. IC Role / Device Role: Secondary surge limiter after gas discharge tube (GDT), handling residual energy not shunted by primary protector. Use Value: Delivers 1000 W peak power handling with 32.4 V clamping - ensures downstream DC-DC controllers remain within 40 V absolute max rating. |
Use Scenario: Brushed DC motor controller board in washing machine, where back-EMF spikes exceed 100 V during commutation. IC Role / Device Role: Flyback energy absorber across H-bridge high-side MOSFET drain-source terminals. Use Value: Responds in <1 ps to clamp spikes before MOSFET avalanche failure; RθJA = 72 °C/W allows thermal design margin under repeated surge duty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/5B | Same DO-214AA package, identical VWM (20 V), VBR (22.2–24.5 V), and VC (32.4 V), but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use only - not approved for vehicle ECU deployment. | Select SMBJ20A-E3/5B only for non-automotive designs where cost sensitivity outweighs qualification requirements. |
| 1.5SMC20A | DO-214AB (SMC) package - larger footprint (7.11 mm × 6.22 mm vs. 4.57 mm × 3.94 mm), higher RθJA (50 °C/W), same electrical specs. | Requires PCB layout change due to larger pad area; better thermal dissipation but incompatible with space-constrained automotive modules. | Choose 1.5SMC20A only when board real estate permits and higher thermal mass is needed for repetitive surge duty. |
Compared with SMBJ20A-E3/5B, SMB10J20HE3/5B adds AEC-Q101 validation for automotive use without electrical trade-offs; versus 1.5SMC20A, it delivers identical protection in 30% smaller footprint but requires tighter thermal management due to higher RθJA.
Availability
SMB10J20HE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power distribution systems requiring stable component supply across multi-year production cycles.
Supply support for SMB10J20HE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMB10J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, surface-mount transient suppression in harsh environments - especially automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMB10J20HE3/5B at its rated peak pulse current?
The SMB10J20HE3/5B has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 30.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during surge events. The SMB10J20HE3/5B maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMB10J20HE3/5B suitable for automotive applications?
Yes, SMB10J20HE3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) per automotive standards. Its DO-214AA package, glass-passivated junction, and MSL Level 1 rating make it appropriate for under-hood and body-control module deployments. The SMB10J20HE3/5B is explicitly listed in Vishay's automotive-grade product matrix for power rail protection.
How does the HE3 suffix differ from E3 in SMB10J20HE3/5B?
The "HE3" suffix in SMB10J20HE3/5B indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas "E3" denotes RoHS compliance only (no automotive qualification) and JESD 201 Class 1A whisker resistance. Both share identical electrical characteristics and DO-214AA packaging, but SMB10J20HE3/5B is certified for automotive use, while SMB10J20A-E3/5B is limited to commercial/industrial applications.
What is the thermal resistance of SMB10J20HE3/5B, and how does it affect layout?
The SMB10J20HE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions - designers must allocate sufficient copper area and consider airflow or adjacent heat sources. For high-duty-cycle surge environments, increasing pad size or adding thermal vias improves derating; the SMB10J20HE3/5B's RθJA directly impacts maximum allowable average power dissipation in continuous fault scenarios.
Can SMB10J20HE3/5B be used in bi-directional protection circuits?
No, SMB10J20HE3/5B is a unidirectional TVS diode, intended for protection on positive DC rails where polarity is fixed. It conducts only in reverse bias above VBR and blocks forward current beyond VF ≈ 3.5 V at 50 A. For bi-directional protection - such as AC signal lines or floating buses - a dedicated bi-directional variant like SMB8J20CA must be used. Using SMB10J20HE3/5B in bi-directional configurations risks forward conduction and improper clamping behavior.
SMB10J20HE3/5B 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 27.9A
- Power - Peak Pulse:
- 1000W (1kW)
- 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 (SMB)
SMB10J20HE3/5B FAQ
1.How can I place an order for SMB10J20HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20HE3/5B 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 SMB10J20HE3/5B reliable?
The price and inventory of SMB10J20HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20HE3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J20HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20HE3/5B?
SMB10J20HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20HE3/5B 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 SMB10J20HE3/5B?
For technical support, including SMB10J20HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20HE3/5B requirements.
6.How does Aetrix verify that SMB10J20HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J20HE3/5B 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 SMB10J20HE3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J20HE3/5B?
All SMB10J20HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20HE3/5B, 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 SMB10J20HE3/5B part is unused and in its original packaging.
Return procedure for SMB10J20HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20HE3/5B Tags
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