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Vishay General Semiconductor - Diodes Division SMBJ22D-M3/H
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- Part No.:
- SMBJ22D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22D-M3/H.pdf
- Description:
- TVS DIODE 22VWM 35.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
SMBJ22D-M3/H 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 DC power rails and signal lines. It features a 22 V stand-off voltage (VWM), 24.8–26.6 V breakdown voltage (VBR) at 1 mA, 35.1 V maximum clamping voltage (VC) at 17.1 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ22D-M3/H datasheet, SMBJ22D-M3/H pinout, SMBJ22D-M3/H application, or SMBJ22D-M3/H equivalent, key selection criteria include verified clamping performance under 17.1 A surge, ±3.5 % VBR tolerance, M3-grade halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse-biased voltage exceeds VBR (24.8–26.6 V), it avalanches to divert transient energy away from downstream ICs. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while the 1.0 W power dissipation at 25 °C ambient enables stable operation without heatsinking in typical board-level deployments.
The device meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow peak temperature. With 0.5 μA max reverse leakage at 22 V and 150 °C max junction temperature, it supports long-term reliability in thermally constrained environments such as enclosed industrial controllers and automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 24 V systems. |
| VBR (Breakdown Voltage) | 24.8–26.6 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC (Clamping Voltage) | 35.1 V at 17.1 A IPPM - limits transient voltage seen by protected circuitry during 600 W surge events. |
| PPPM | 600 W (10/1000 μs waveform) - sustains high-energy ESD and lightning-induced surges without failure. |
| ID (Leakage Current) | ≤0.5 μA at 22 V - negligible standby power loss and no measurable impact on high-impedance sensor biasing. |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline compatible with IPC-7351B footprint and pick-and-place automation. |
| TJ max | 150 °C - supports operation in under-hood automotive and industrial enclosures without derating below full rating. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on one end; compliant with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during transient events. |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 24 V supply rail); avalanche conduction initiates here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking in safety-critical designs. |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surge (4 kV line-to-earth) without degradation in standard PCB layouts. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports single-pass lead-free assembly in high-volume manufacturing. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills EU ELV and JEDEC environmental mandates for automotive and industrial OEM programs. |
| 0.5 μA max ID at VWM | Preserves accuracy in precision analog front-ends and battery-powered sensor nodes with microamp-level quiescent budgets. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protection of 24 V CAN transceiver power rails against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between VCC and GND upstream of LDO regulator. Use Value: Limits voltage excursion to ≤35.1 V during 17.1 A surge, preventing LDO latch-up and MCU brownout in BCU power domains. |
Use Scenario: Guarding LIN bus physical layer against ESD and inductive switching noise in door module electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN signal line (VWM = 22 V) with fast response to sub-ns transients. Use Value: Clamps ESD pulses to <35.1 V within <1 ns, maintaining LIN signal integrity and avoiding PHY reset events. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Secondary-side DC bus protection in PoE-powered network switches exposed to induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on +24 V auxiliary rail feeding Ethernet PHY and management ICs. Use Value: Absorbs 600 W surge energy without thermal runaway, preserving PoE negotiation and link stability. |
Use Scenario: Suppressing flyback spikes from brushed DC motor commutation in smart washing machine control boards. IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals referenced to chassis ground. Use Value: Clamps inductive kickback to 35.1 V, protecting H-bridge MOSFETs rated for 40 V drain-source breakdown. |
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-M3/H | Bidirectional variant; symmetric VBR (24.8–26.6 V) and VC (35.1 V) in both polarities; same PPPM and package. | Required where AC-coupled or dual-polarity signal lines (e.g., RS-485, USB D+/D−) need protection without polarity constraints. | Select SMBJ22A-M3/H only if bidirectional clamping is explicitly required; SMBJ22D-M3/H provides lower leakage and tighter system margin for DC rails. |
| SMCJ22A | Larger SMC (DO-214AB) package; same electrical specs but higher thermal mass (RθJA = 40 °C/W vs. 125 °C/W) and 1500 W PPPM rating. | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) where PCB space allows larger footprint. | Choose SMCJ22A only when 1500 W surge capability is mandated and layout permits SMC footprint; SMBJ22D-M3/H optimizes cost and density for 600 W-class protection. |
Compared with SMBJ22A-M3/H, the SMBJ22D-M3/H offers lower leakage and simplified polarity routing for DC rails; versus SMCJ22A, it trades surge headroom for compact SMB footprint and lower assembly cost in space-constrained consumer and industrial boards.
Availability
SMBJ22D-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMBJ22D-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMBJ series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - balancing clamping precision, thermal robustness, and automated manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ22D-M3/H at its rated peak pulse current?
The SMBJ22D-M3/H has a maximum clamping voltage (VC) of 35.1 V at its rated peak pulse current (IPPM) of 17.1 A, measured using the standardized 10/1000 μs double-exponential surge waveform. This value defines the highest voltage the protected circuit will experience during a full 600 W transient event, making SMBJ22D-M3/H suitable for safeguarding 24 V systems where downstream ICs require strict overvoltage limits.
Is SMBJ22D-M3/H compatible with lead-free reflow soldering processes?
Yes, SMBJ22D-M3/H is qualified to MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, fully compliant with standard lead-free soldering profiles. Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability requirements, and the M3 suffix confirms halogen-free, RoHS-compliant construction - ensuring reliable joint formation without voiding or dewetting in high-throughput SMT lines.
How does the VBR tolerance of SMBJ22D-M3/H affect system-level surge coordination?
The SMBJ22D-M3/H features a tight ±3.5 % breakdown voltage tolerance (24.8–26.6 V), which minimizes variation in turn-on threshold across production units. This enables precise coordination with upstream fuses and downstream IC absolute maximum ratings - for example, ensuring clamping occurs well below the 40 V drain-source rating of protected MOSFETs while maintaining sufficient margin above the 22 V stand-off voltage to avoid false triggering during normal 24 V rail ripple.
Can SMBJ22D-M3/H be used in bidirectional signal line protection?
No - SMBJ22D-M3/H is a unidirectional TVS diode, intended for DC rail or single-polarity signal protection. For bidirectional applications like RS-485, CAN, or AC-coupled interfaces, the bidirectional variant SMBJ22A-M3/H must be used instead. Using SMBJ22D-M3/H on a bidirectional line would result in forward conduction during negative half-cycles, causing malfunction or damage; its cathode band clearly indicates polarity-sensitive installation.
What is the thermal resistance of SMBJ22D-M3/H under standard PCB mounting conditions?
Under standard mounting on the minimum recommended copper pad layout, SMBJ22D-M3/H exhibits a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W. This value determines steady-state temperature rise: at 1.0 W power dissipation (its rated PD at 25 °C ambient), junction temperature rises ~125 °C above ambient - confirming why SMBJ22D-M3/H is rated for 150 °C max TJ and requires no additional heatsinking in typical 24 V industrial applications with moderate duty cycles.
SMBJ22D-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ22D-M3/H FAQ
1.How can I place an order for SMBJ22D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22D-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 SMBJ22D-M3/H reliable?
The price and inventory of SMBJ22D-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 SMBJ22D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ22D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22D-M3/H?
SMBJ22D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22D-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 SMBJ22D-M3/H?
For technical support, including SMBJ22D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22D-M3/H requirements.
6.How does Aetrix verify that SMBJ22D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22D-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 SMBJ22D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ22D-M3/H?
All SMBJ22D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22D-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 SMBJ22D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ22D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22D-M3/H Tags
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