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Vishay General Semiconductor - Diodes Division SMBJ22-E3/5B
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- Part No.:
- SMBJ22-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22-E3/5B.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,366
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Product details
Overview
SMBJ22-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ22-E3/5B datasheet, SMBJ22-E3/5B pinout, SMBJ22-E3/5B application, or SMBJ22-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant commercial-grade qualification, and direct substitution guidance against industry-standard TVS alternatives.
Technical Context
The SMBJ22-E3/5B operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping action begins at VBR ≥ 24.4 V and limits transient energy to ≤35.5 V at 16.9 A, enabling reliable protection of 24 V DC systems against ISO 7637-2 pulse 1/2a/5a and IEC 61000-4-5 surges.
Thermal design is constrained by RθJA = 100 °C/W (typ.) and TJ(max) = 150 °C, requiring PCB copper pad area ≥ 5.0 mm × 5.0 mm per terminal for rated 600 W pulse handling. The device is rated for repetitive surge duty cycle ≤ 0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines upper limit for 24 V nominal rail protection. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Ensures consistent avalanche initiation across production lot; guarantees turn-on before downstream IC damage thresholds. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamped voltage during 10/1000 µs surge; stays below 40 V absolute max rating of common 3.3 V/5 V logic interfaces. |
| PPPM | 600 W - Peak pulse power handling capability; supports single-event transients up to 600 W without degradation when mounted per recommended pad layout. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush or load-dump events in automotive 12/24 V systems. |
| TJ(max) | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial enclosures without active cooling. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and standard reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or lower-potential node; conducts during positive transients when cathode is biased above anode. |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 24 V rail or CAN_H); initiates breakdown when voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-event suppression of high-energy transients without thermal runaway when PCB layout follows 5.0 mm × 5.0 mm copper pad recommendation. |
| 35.5 V clamping voltage @ 16.9 A | Keeps protected ICs (e.g., microcontrollers, gate drivers) within safe operating area during ISO 7637-2 Pulse 5a load dump events on 24 V systems. |
| Glass passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1.0 µA at VWM), and long-term reliability under thermal cycling and humidity stress. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without preconditioning or special bake-out; eliminates moisture-related popcorning risk during manufacturing. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements; suitable for non-automotive industrial, telecom, and consumer applications. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input stage against inductive kickback from relay coils and solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp transients <100 ns after onset. Use Value: Limits voltage excursion to ≤35.5 V, preventing latch-up or oxide rupture in upstream DC-DC controllers and MCU power supplies. |
Use Scenario: Surge suppression on LIN bus lines and power inputs in door module ECUs exposed to battery disconnect/load dump. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump) energy. Use Value: Maintains signal integrity below LIN physical layer threshold (40 V) while surviving 100 A/600 W pulses per test standard. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection of AC/DC adapters and PoE injectors against lightning-induced surges on primary-side DC bus. IC Role / Device Role / Timing Role: Primary-side TVS parallel to bulk capacitor, triggered before MOV or fuse activation. Use Value: Provides faster response than MOVs (ns vs. µs), reducing let-through energy to downstream rectifiers and PWM controllers. |
Use Scenario: Overvoltage safeguard on microcontroller I/O lines connected to push-button interfaces or sensor analog outputs. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical) placed directly at connector entry point. Use Value: Prevents ESD-induced reset or latch-up in 3.3 V/5 V MCUs without distorting signal edges in 10 kHz–1 MHz control loops. |
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 | Same electrical specs and package; identical marking code "BX" per datasheet Table 1; E3/5B denotes same RoHS-compliant tape-and-reel packaging. | No functional difference; alternate part number format used interchangeably by Vishay for same device. | Select SMBJ22A-E3/5B only if BOM requires explicit "A" suffix for unidirectional designation per internal naming convention. |
| SMCJ22A-E3/57T | Higher 1500 W PPPM, larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), 38.9 V VC @ 38.9 A - not pin-compatible. | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but requires PCB layout change and increased board area. | Choose SMCJ22A-E3/57T only when 600 W is insufficient and mechanical redesign is acceptable; otherwise SMBJ22-E3/5B remains optimal for space-constrained 24 V systems. |
Compared with SMBJ22A-E3/5B (identical function, alternate marking) and SMCJ22A-E3/57T (higher-power, larger-footprint alternative), SMBJ22-E3/5B delivers best-in-class power density for 24 V protection - enabling compact, cost-effective layouts without sacrificing clamping performance or thermal margin.
Availability
SMBJ22-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ22-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting 24 V industrial automation, automotive subsystems, and infrastructure power systems where fast clamping and repeatable surge endurance are critical.
FAQ
What is the maximum clamping voltage of SMBJ22-E3/5B under surge conditions?
The SMBJ22-E3/5B has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe voltage margins during standardized surge events. The SMBJ22-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ22-E3/5B suitable for automotive applications?
SMBJ22-E3/5B is RoHS-compliant commercial-grade (E3 suffix) and not AEC-Q101 qualified; it lacks the automotive qualification denoted by HE3/HM3 suffixes. For automotive use, specify SMBJ22HE3_B/I or equivalent AEC-Q101 variants. The SMBJ22-E3/5B remains appropriate for non-safety-critical industrial or telecom applications where AEC-Q101 is not mandated.
What is the standoff voltage rating of SMBJ22-E3/5B?
The standoff voltage (VWM) of SMBJ22-E3/5B is 22 V - the maximum DC or continuous reverse voltage the device can withstand without exceeding 1.0 µA leakage current. This rating makes SMBJ22-E3/5B ideal for protecting 24 V nominal systems where normal operating voltage peaks near 28 V, ensuring no false triggering during steady-state operation.
Does SMBJ22-E3/5B have bidirectional capability?
No, SMBJ22-E3/5B is a unidirectional TVS diode, indicated by the absence of "CA" suffix (e.g., SMBJ22CA). Its cathode band marks the polarity-sensitive terminal, and it conducts only during reverse-biased overvoltage events. For bidirectional protection, select SMBJ22CA-E3/5B, which provides symmetrical clamping for AC-coupled or floating signal lines.
What is the thermal resistance of SMBJ22-E3/5B from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ22-E3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction and natural convection; actual thermal performance depends on copper area, layer count, and airflow. Derating curves in Figure 2 of the datasheet must be applied above 25 °C ambient.
SMBJ22-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22-E3/5B FAQ
1.How can I place an order for SMBJ22-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22-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 SMBJ22-E3/5B reliable?
The price and inventory of SMBJ22-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 SMBJ22-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22-E3/5B?
SMBJ22-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22-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 SMBJ22-E3/5B?
For technical support, including SMBJ22-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22-E3/5B requirements.
6.How does Aetrix verify that SMBJ22-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22-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 SMBJ22-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22-E3/5B?
All SMBJ22-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22-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 SMBJ22-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ22-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22-E3/5B Tags
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