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Vishay General Semiconductor - Diodes Division SMBJ22CD-M3/H
- Part No.:
- SMBJ22CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CD-M3/H.pdf
- Description:
- TVS DIODE 22VWM 35.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
SMBJ22CD-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 22 V standoff voltage (VWM), 24.8–26.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), ≤0.5 μA reverse leakage at VWM, and clamps to ≤35.1 V at 17.1 A peak surge current - deployed in sensor interface protection for industrial control systems.
For engineers reviewing the SMBJ22CD-M3/H datasheet, SMBJ22CD-M3/H pinout, SMBJ22CD-M3/H application, or SMBJ22CD-M3/H equivalent, key selection criteria include bidirectional clamping capability, tight ±3.5 % VBR tolerance, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on PCBs requiring robust ESD and lightning surge immunity.
Technical Context
This device operates as a voltage-clamping protector using avalanche breakdown in both polarities, enabling symmetrical transient suppression without polarity dependency. Its low incremental surge resistance and fast response time ensure effective clamping of inductive switching spikes and ESD events before downstream ICs are damaged.
The SMBJ22CD-M3/H is rated for -55 °C to +150 °C junction temperature, with thermal resistance RθJA = 125 °C/W (on minimum pad layout) and RθJM = 20 °C/W, supporting reliable operation under repetitive surge conditions when mounted per recommended 5.0 mm × 5.0 mm copper pad area.
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 min/max | 24.8 V / 26.6 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 35.1 V at 17.1 A - clamped voltage during 10/1000 μs surge; determines maximum stress on protected circuitry. |
| PPPM | 600 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-ground). |
| ID @ VWM | ≤0.5 μA - ultra-low leakage preserves signal integrity and battery life in high-impedance sensor interfaces. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Two-terminal bidirectional device housed in SMB (DO-214AA) package; no polarity marking - terminals are symmetric and interchangeable. Case conforms to JEDEC DO-214AA mechanical standard with matte tin-plated leads, halogen-free molding compound (UL 94 V-0), and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Transient conduction path | Both terminals conduct identically during positive or negative surges; no DC bias dependency required. |
| Case | Thermal and mechanical interface | Exposed cathode-side metal tab (per DO-214AA) provides primary thermal path to PCB copper; requires minimum 5.0 mm × 5.0 mm pad for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| ±3.5 % VBR tolerance | Reduces design margin overhead and eliminates need for binning or post-layout voltage margin validation. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C) without dry-pack or baking requirements. |
| 600 W surge rating (10/1000 μs) | Meets IEC 61000-4-5 surge immunity for industrial equipment up to 4 kV line-to-ground, with <1 ns response time. |
| Halogen-free & RoHS | Complies with IPC-1752A material declaration requirements and EU RoHS Directive 2011/65/EU Annex II. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (CAN/LIN) in PLC I/O modules exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt transients before reaching precision ADCs or microcontroller GPIOs. Use Value: Limits induced voltage to ≤35.1 V during 17.1 A surge, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. |
Use Scenario: Safeguarding LIN bus transceivers and window motor driver inputs against load dump and jump-start voltage spikes in door control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN data line and ground, absorbing both positive and negative transients without DC blocking capacitors. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1/2/5a while adding <0.5 μA leakage that avoids bias current errors in current-sense circuits. |
| Telecom Power Feeding | Consumer USB-C Port Protection |
|
Use Scenario: Shielding PoE-powered Ethernet PHYs and auxiliary power rails (e.g., 12 V PSE side) from lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Paired with common-mode chokes to clamp differential and common-mode overvoltages simultaneously on data pairs and power lines. Use Value: Withstands 600 W pulses without degradation, enabling compliance with IEC 61000-4-5 Ed. 3, 4 kV line-to-ground test level. |
Use Scenario: Guarding USB-C CC and VCONN lines against ESD (IEC 61000-4-2 ±15 kV air/±8 kV contact) and hot-plug voltage overshoot during cable insertion. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional suppressor placed adjacent to connector to minimize stub length and preserve signal rise time. Use Value: Clamps ESD events within <1 ns while adding only 0.5 μA leakage - critical for maintaining USB PD negotiation accuracy and VCONN regulation stability. |
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-E3/52 (Vishay) | Same VWM/VBR/PPPM specs but M3/H suffix omitted; RoHS-compliant but not halogen-free; MSL Level 1 confirmed. | No difference in circuit function; differs only in material compliance and packaging tape/reel configuration (52 = 3200 pcs/reel). | Select SMBJ22CA-E3/52 if halogen-free requirement is waived and higher reel quantity is preferred. |
| 1.5SMC22CA (ON Semiconductor) | Same SMB package and bidirectional 22 V rating, but 1.5 kW peak power (10/1000 μs); higher VC (36.5 V) and wider VBR tolerance (±5 %). | Higher surge margin suits harsher environments (e.g., outdoor telecom), but larger VC may exceed protected IC's absolute max rating. | Choose 1.5SMC22CA only if system-level surge testing exceeds 600 W and downstream voltage margin allows ≥36.5 V clamping. |
Compared with SMBJ22CD-M3/H, SMBJ22CA-E3/52 offers identical electrical performance with relaxed environmental compliance, while 1.5SMC22CA trades tighter VBR control and lower clamping for higher surge headroom - making SMBJ22CD-M3/H optimal for cost-sensitive, space-constrained industrial designs requiring halogen-free and precise clamping.
Availability
SMBJ22CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power feeding, and consumer USB-C port protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ22CD-M3/H 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, power efficiency, and ruggedized packaging.
The SMBJ series targets board-level transient protection in space-constrained applications, delivering high-power surge suppression in low-profile surface-mount packages for industrial, automotive, and communications infrastructure.
FAQ
What is the exact standoff voltage and breakdown range for SMBJ22CD-M3/H?
The SMBJ22CD-M3/H has a reverse standoff voltage (VWM) of 22 V and a breakdown voltage (VBR) range of 24.8 V to 26.6 V at 1 mA test current. This ±3.5 % tolerance is confirmed in Vishay's Document Number 87606, Revision 09-Jan-2024, ensuring consistent clamping behavior across manufacturing lots and temperature ranges.
Is SMBJ22CD-M3/H unidirectional or bidirectional, and how does that affect circuit placement?
SMBJ22CD-M3/H is a bidirectional TVS diode - it clamps transients of either polarity symmetrically, with no cathode band marking. This allows direct placement across any two nodes requiring mutual overvoltage protection (e.g., differential signal lines like RS-485 A/B or USB D+/D−), eliminating orientation checks during assembly and simplifying layout.
Does SMBJ22CD-M3/H meet moisture sensitivity and reflow requirements for automated SMT assembly?
Yes, SMBJ22CD-M3/H meets J-STD-020 MSL Level 1 with a maximum reflow peak temperature of 260 °C. Its halogen-free, RoHS-compliant construction and matte tin-plated leads ensure compatibility with standard lead-free reflow profiles and eliminate pre-baking requirements - critical for high-yield automated placement in volume production.
What is the clamping voltage of SMBJ22CD-M3/H under maximum surge conditions?
At its rated peak pulse current of 17.1 A (10/1000 μs waveform), SMBJ22CD-M3/H clamps to a maximum voltage of 35.1 V. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - essential for verifying compatibility with downstream IC absolute maximum ratings.
How does the thermal performance of SMBJ22CD-M3/H impact PCB layout?
SMBJ22CD-M3/H has a junction-to-ambient thermal resistance (RθJA) of 125 °C/W on minimum recommended pad layout, dropping to 100 °C/W on 5.0 mm × 5.0 mm copper pads. To sustain 600 W surge capability without thermal runaway, designers must implement at least this pad area and avoid excessive copper isolation around the SMB footprint.
SMBJ22CD-M3/H 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.8V
- Voltage - Clamping (Max) @ Ipp:
- 35.1V
- Current - Peak Pulse (10/1000µs):
- 17.1A
- 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)
SMBJ22CD-M3/H FAQ
1.How can I place an order for SMBJ22CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CD-M3/H 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 SMBJ22CD-M3/H reliable?
The price and inventory of SMBJ22CD-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ22CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CD-M3/H?
SMBJ22CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CD-M3/H 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 SMBJ22CD-M3/H?
For technical support, including SMBJ22CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CD-M3/H requirements.
6.How does Aetrix verify that SMBJ22CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22CD-M3/H 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 SMBJ22CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ22CD-M3/H?
All SMBJ22CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CD-M3/H, 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 SMBJ22CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ22CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CD-M3/H Tags
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