My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ22A-E3/5B
;;2.jpg)
- Part No.:
- SMBJ22A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22A-E3/5B.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,499
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ22A-E3/5B 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 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.
For engineers reviewing the SMBJ22A-E3/5B datasheet, SMBJ22A-E3/5B pinout, SMBJ22A-E3/5B application, or SMBJ22A-E3/5B equivalent, key selection criteria include clamping performance under 16.9 A surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin-plated leads, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
The SMBJ22A-E3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (24.4–26.9 V), with cathode band marking polarity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to transient events.
It is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), operates across –55 °C to +150 °C junction temperature range, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is not AEC-Q101 qualified - the HE3/HM3 suffix variants are required for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR @ IT = 1 mA | 24.4–26.9 V - Measured breakdown range confirming reliable turn-on threshold under standardized test conditions. |
| VC @ IPPM = 16.9 A | 35.5 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against common industrial and telecom surge waveforms. |
| IPPM | 16.9 A - Peak pulse current supported at VC; used to size PCB trace width and verify layout survivability. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs derating requirements for sustained power dissipation. |
| Package | SMB (DO-214AA) - Low-profile SMT outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with standard pick-and-place equipment. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by molded band. Dimensions: 5.21 mm × 4.06 mm × 2.20 mm (L × W × H). Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (low-side reference) | Connected to ground or low-voltage rail in unidirectional TVS configuration; carries surge current to reference plane. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., I/O, power rail); initiates avalanche conduction when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without external series impedance. |
| 35.5 V clamping voltage at 16.9 A | Limits voltage overshoot on 24 V systems to within safe operating range of 3.3 V/5 V logic interfaces and gate drivers. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage (<1 µA at 22 V), critical for low-power sensor and battery-backed circuits. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination. |
| RoHS-compliant, commercial grade | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU; suitable for consumer, industrial, and telecom end equipment. |
Applications
| Industrial Motor Control | Automotive Body Control Module (Non-AEC) |
|---|---|
|
Use Scenario: Protection of microcontroller GPIO and CAN transceiver power rails against back-EMF from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply rail and ground, clamping transients before they reach LDO inputs or MCU VDD. Use Value: Limits rail collapse to ≤35.5 V during 16.9 A inductive kick, preventing brownout resets and latch-up in 3.3 V logic domains. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply outputs in non-safety-critical cabin modules (e.g., seat position sensors). IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V sensor supply line, absorbing ESD and load-dump energy while maintaining <1 µA leakage at 12 V. Use Value: Maintains signal integrity during ISO 10605 ±8 kV contact discharge events without degrading baseline current consumption. |
| Telecom Power Interface | Consumer Appliance Display Backlight |
|
Use Scenario: Input-stage protection on AC/DC adapter secondary-side 24 V output feeding PoE-powered edge devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC output rail, coordinated with upstream MOV and downstream polymer PTC. Use Value: Absorbs 600 W surge energy without thermal runaway, enabling compact design with no heatsink required on 5.0 mm × 5.0 mm copper pads. |
Use Scenario: Transient suppression on LED driver output lines driving white LED strings in smart refrigerators and washing machines. IC Role / Device Role / Timing Role: Fast-response clamp across LED anode-cathode path, triggered by inductive flyback from boost converter switching node. Use Value: Prevents LED string open-circuit failure by limiting reverse voltage to 35.5 V during 10/1000 µs transients, preserving luminance consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/5B | Bidirectional variant; symmetric VBR (24.4–26.9 V) in both polarities; no polarity marking. | Required for AC-coupled signal lines (e.g., RS-485, audio), where reverse polarity transients occur. | Select SMBJ22CA-E3/5B only when protecting bidirectional data paths; SMBJ22A-E3/5B is optimal for DC power/signal rails with defined ground reference. |
| SMAJ22A-E3/52 | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable for space-constrained designs with lower surge threat levels (e.g., IEC 61000-4-2 ESD only). | Choose SMAJ22A-E3/52 for cost-sensitive, low-density layouts; SMBJ22A-E3/5B preferred where 600 W IEC 61000-4-5 immunity is mandatory. |
Compared with SMBJ22CA-E3/5B and SMAJ22A-E3/52, the SMBJ22A-E3/5B delivers higher surge robustness in a thermally optimized SMB package, making it the default choice for 24 V DC power rail protection where unidirectional clamping suffices and board area permits.
Availability
SMBJ22A-E3/5B is available at Aetrix Electronics and suitable for industrial motor control, telecom power interface, and consumer appliance display backlight applications requiring stable component supply, RoHS-compliant sourcing, and consistent tape-and-reel delivery for high-volume SMT production.
Supply support for SMBJ22A-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and ruggedized packaging.
The SMBJ series was developed for high-energy transient suppression in harsh environments, targeting industrial automation, telecom infrastructure, and automotive subsystems where fast clamping and repeatable surge endurance are essential.
FAQ
What is the maximum clamping voltage of SMBJ22A-E3/5B at its rated peak pulse current?
The SMBJ22A-E3/5B has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 16.9 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components remain within absolute maximum ratings. The SMBJ22A-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ22A-E3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ22A-E3/5B is not AEC-Q101 qualified. It carries the E3 suffix, indicating RoHS-compliant commercial-grade construction only. For automotive use, Vishay specifies the HE3 or HM3 suffix variants (e.g., SMBJ22AHE3_B/I), which undergo additional stress testing per AEC-Q101 and are marked with automotive-specific revision codes. The SMBJ22A-E3/5B remains appropriate for industrial, telecom, and consumer applications where automotive qualification is not mandated.
How does the SMBJ22A-E3/5B differ from the SMBJ22CA-E3/5B in terms of electrical behavior?
The SMBJ22A-E3/5B is unidirectional and conducts only in reverse bias above its breakdown voltage (24.4–26.9 V), with polarity indicated by a cathode band. The SMBJ22CA-E3/5B is bidirectional, exhibiting identical breakdown and clamping characteristics in both directions and lacking polarity marking. This makes SMBJ22CA-E3/5B suitable for AC signal lines like RS-485 or audio, whereas SMBJ22A-E3/5B is intended for DC rails with a defined ground reference. Both share identical VWM, VBR, VC, and PPPM ratings.
What is the thermal resistance and how does it impact SMBJ22A-E3/5B layout design?
The SMBJ22A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly governs power derating: at 75 °C ambient, its usable power drops to ~2.5 W (50 % of 5.0 W rated PD). Layout must provide minimum pad area and avoid thermal isolation; reducing pad size increases RθJA, risking thermal runaway during repetitive surges. The SMBJ22A-E3/5B requires no heatsink for single-event protection but relies on PCB copper for thermal mass.
Can SMBJ22A-E3/5B be used in place of SMAJ22A-E3/52, and what trade-offs apply?
SMBJ22A-E3/5B can replace SMAJ22A-E3/52 in most applications due to identical VWM, VBR, and VC specifications, but with key trade-offs: SMBJ22A-E3/5B offers 600 W peak pulse power (vs. 400 W for SMAJ22A) and lower thermal resistance (100 vs. 140 °C/W), improving surge survivability and thermal margin. However, its SMB package is larger (5.21 mm × 4.06 mm vs. 4.57 mm × 2.62 mm), requiring more PCB area. Use SMBJ22A-E3/5B where robustness outweighs size constraints.
SMBJ22A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 16.9A
- 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)
SMBJ22A-E3/5B FAQ
1.How can I place an order for SMBJ22A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22A-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 SMBJ22A-E3/5B reliable?
The price and inventory of SMBJ22A-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 SMBJ22A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ22A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22A-E3/5B?
SMBJ22A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22A-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 SMBJ22A-E3/5B?
For technical support, including SMBJ22A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22A-E3/5B requirements.
6.How does Aetrix verify that SMBJ22A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ22A-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 SMBJ22A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ22A-E3/5B?
All SMBJ22A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22A-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 SMBJ22A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ22A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22A-E3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
