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Vishay General Semiconductor - Diodes Division SMBJ22HE3/5B
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- Part No.:
- SMBJ22HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22HE3/5B.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,830
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Product details
Overview
SMBJ22HE3/5B 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 sensitive electronics. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBJ22HE3/5B datasheet, SMBJ22HE3/5B pinout, SMBJ22HE3/5B application, or SMBJ22HE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and real-world clamping behavior under surge conditions - critical for ESD and load-dump immunity design validation.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches rapidly (<1 ps response) to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1 µA at 22 V) and low incremental surge resistance, enabling consistent clamping performance across repetitive transients.
Rated for 600 W peak pulse power (10/1000 µs), SMBJ22HE3/5B sustains 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HE3 suffix confirms RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC rail margin. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Ensures predictable avalanche onset across process variation and temperature. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamping voltage during 10/1000 µs surge; limits stress on protected MOSFET or MCU I/O. |
| PPPM | 600 W - Peak transient energy absorption capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a compliance. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves battery life and avoids false triggering in high-impedance sensor circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance informs PCB copper pad sizing (0.2" × 0.2") for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to ground or low-side return path; establishes reference for clamping action. |
| Cathode | Avalanche conduction terminal / Transient sink | Connected to protected line (e.g., 24 V supply rail); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| 600 W peak pulse power (10/1000 µs) | Withstands severe load-dump transients (ISO 16750-2) and inductive switching spikes without degradation. |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage drift over temperature, and resistance to humidity-induced parameter shift. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against ISO 7637-2 Pulse 5a load-dump surges up to 60 V. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients within 1 ns. Use Value: Limits rail voltage to ≤35.5 V during 16.9 A surge, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS connected across signal and ground to suppress ESD and cable-coupled noise. Use Value: Maintains signal integrity with <0.1% full-scale error impact while surviving ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Input Stage | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered switch port DC inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on 48 V input rail, coordinated with upstream GDT and downstream π-filter. Use Value: Absorbs 600 W transient energy without thermal runaway, enabling compact layout with no heatsink required. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed across motor terminals to clamp flyback voltage spikes. Use Value: Prevents MOSFET drain-source breakdown by limiting spike amplitude to 35.5 V, extending power stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC specs, identical SMB package and pinout. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost optimization is prioritized and automotive reliability certification is unnecessary. |
| SMCJ22AHE3/5B | Same AEC-Q101 qualification but in larger SMC (DO-214AB) package; higher 1500 W PPPM rating and lower RθJA (50 °C/W). | Better thermal performance and surge margin; requires larger PCB footprint and different pad layout. | Choose when system-level surge testing exceeds 600 W or ambient temperatures exceed 105 °C. |
Compared with SMBJ22A-E3/5B, SMBJ22HE3/5B adds AEC-Q101 qualification without altering electrical behavior - essential for automotive BOMs. Versus SMCJ22AHE3/5B, it trades higher surge capacity for space-constrained layouts where 600 W suffices and board area is premium.
Availability
SMBJ22HE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom power supplies, and consumer appliance motor controls requiring stable component supply with guaranteed AEC-Q101 compliance and traceable sourcing.
Supply support for SMBJ22HE3/5B 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, efficiency, and application-specific optimization.
The SMBJ series targets high-reliability transient suppression in space-constrained, thermally demanding environments - engineered for automotive, industrial, and telecom infrastructure where failure modes must be rigorously controlled.
FAQ
What is the clamping voltage of SMBJ22HE3/5B at its rated peak pulse current?
The SMBJ22HE3/5B has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 88392, Table on page 2. The SMBJ22HE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ22HE3/5B qualified for automotive applications?
Yes, SMBJ22HE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification validates its reliability for automotive use cases including engine control, body electronics, and ADAS subsystems. The qualification covers temperature cycling, humidity testing, mechanical shock, and surge endurance - all per the AEC-Q101 standard. SMBJ22HE3/5B is explicitly listed in Vishay's automotive ordering codes table on page 1 of document 88392.
What is the standoff voltage and breakdown voltage range for SMBJ22HE3/5B?
The SMBJ22HE3/5B has a reverse stand-off voltage (VWM) of 22 V and a breakdown voltage (VBR) range of 24.4 V to 26.9 V at 1 mA test current. These values are specified in the Electrical Characteristics table on page 2 of Vishay document 88392. The VBR min/max spread reflects manufacturing tolerance and ensures reliable turn-on behavior across production lots while maintaining sufficient margin above VWM for stable operation.
Does SMBJ22HE3/5B have a bidirectional variant?
No, SMBJ22HE3/5B is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., SMBJ22CA), which are functionally distinct devices with symmetrical breakdown in both directions. The "HE3" suffix applies only to unidirectional AEC-Q101 qualified parts. Using a bidirectional part in place of SMBJ22HE3/5B would require circuit redesign due to polarity and clamping behavior differences - the SMBJ22HE3/5B must be oriented with cathode toward the protected line.
What package type and mounting specifications apply to SMBJ22HE3/5B?
SMBJ22HE3/5B uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.20 mm and matte tin-plated leads. It is rated for MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak. Recommended mounting uses 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Thermal Characteristics section of the Vishay datasheet for optimal thermal performance of the SMBJ22HE3/5B.
SMBJ22HE3/5B 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 15.2A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ22HE3/5B FAQ
1.How can I place an order for SMBJ22HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22HE3/5B 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 SMBJ22HE3/5B reliable?
The price and inventory of SMBJ22HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22HE3/5B?
SMBJ22HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22HE3/5B 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 SMBJ22HE3/5B?
For technical support, including SMBJ22HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22HE3/5B requirements.
6.How does Aetrix verify that SMBJ22HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22HE3/5B 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 SMBJ22HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22HE3/5B?
All SMBJ22HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22HE3/5B, 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 SMBJ22HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ22HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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