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Vishay General Semiconductor - Diodes Division SMBJ20CAHE3_B/H
- Part No.:
- SMBJ20CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ20CAHE3_B/H.pdf
- Description:
- 600W,20V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,616
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Product details
Overview
SMBJ20CAHE3_B/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 power and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V maximum clamping voltage (VC) at 18.5 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in industrial sensor protection and DC power rail surge suppression.
For engineers reviewing the SMBJ20CAHE3_B/H datasheet, SMBJ20CAHE3_B/H pinout, SMBJ20CAHE3_B/H application, or SMBJ20CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching transients before IC damage occurs.
The SMBJ20CAHE3_B/H is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification confirms suitability for automotive electronics where reliability under thermal cycling and mechanical stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 22.2 V / 24.5 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on across production lots. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamping voltage under 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; negligible power loss and minimal impact on high-impedance signal lines. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard PCB pad; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | Enables clamping during both positive and negative transients without external polarity consideration. |
| Cathode | Current exit terminal in forward bias; electrically identical to anode in bidirectional operation | Eliminates need for orientation verification during automated placement; simplifies layout and BOM management. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation when properly heatsinked. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfaces. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protecting 24 V CAN/LIN bus transceivers and analog sensor front-ends from load dump and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across VCC-GND and signal lines to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide rupture in microcontrollers and ADCs during 100 V/10 ms load dump events per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding 12 V power inputs of BCM ECUs exposed to alternator load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary TVS on main power rail, coordinated with upstream fuses and secondary LC filtering. Use Value: Limits clamped voltage to 32.4 V-well below 36 V automotive IC survival threshold-while surviving ≥1000 surges at rated power. |
| Telecom PoE Data Line Protection | Consumer Appliance Motor Drive Board |
|
Use Scenario: Shielding Ethernet PHY magnetics and data pairs in IEEE 802.3af/at-powered devices from ESD and surge coupling. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pairs (e.g., MDI-X) with low capacitance (<100 pF) to preserve signal integrity. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) within <1 ns while adding <0.5 pF parasitic capacitance per line-no data rate penalty. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across motor terminals and H-bridge supply rails to absorb inductive energy during PWM switching. Use Value: Handles repetitive 600 W surges at 0.01% duty cycle without thermal runaway, extending MOSFET lifespan and reducing field failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-E3/52 | Commercial-grade (non-AEC-Q101), same electrical specs and SMB package | Lacks automotive qualification; suitable for industrial/commercial designs without automotive compliance mandates | Select SMBJ20CAHE3_B/H when AEC-Q101 validation is required; choose SMBJ20CA-E3/52 for cost-sensitive non-automotive use. |
| SMCJ20CAHE3_A/H | Higher-power 1500 W version in larger SMC (DO-214AB) package; identical VWM/VBR/VC | Requires larger PCB footprint and higher thermal mass; used where surge energy exceeds 600 W limits | Choose SMBJ20CAHE3_B/H for space-constrained 600 W applications; upgrade to SMCJ20CAHE3_A/H only if test data confirms >600 W surge exposure. |
Compared with SMBJ20CA-E3/52, SMBJ20CAHE3_B/H adds AEC-Q101 qualification without altering clamping performance; versus SMCJ20CAHE3_A/H, it trades 2.5× lower surge power for 40 % smaller board area and faster assembly throughput.
Availability
SMBJ20CAHE3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom PoE equipment, and consumer appliance motor drives requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ20CAHE3_B/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, rectifiers, and protection devices with emphasis on reliability and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and communications systems demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of SMBJ20CAHE3_B/H at its rated peak pulse current?
The SMBJ20CAHE3_B/H has a maximum clamping voltage (VC) of 32.4 V at 18.5 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed across production lots per Vishay Document 88392. The SMBJ20CAHE3_B/H maintains this clamping performance with ≤5 % variation over its -55 °C to +150 °C operating junction temperature range.
Is SMBJ20CAHE3_B/H suitable for automotive applications?
Yes, SMBJ20CAHE3_B/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. It undergoes rigorous stress testing-including temperature cycling, high-temperature operating life, and mechanical shock-to meet automotive electronic module requirements. The SMBJ20CAHE3_B/H is commonly deployed in body control modules, infotainment power supplies, and sensor interfaces where compliance with automotive reliability standards is mandatory.
How does the bidirectional design of SMBJ20CAHE3_B/H affect circuit implementation?
The bidirectional design of SMBJ20CAHE3_B/H eliminates polarity marking and orientation constraints during PCB layout and automated placement. Unlike unidirectional TVS diodes, SMBJ20CAHE3_B/H provides symmetrical clamping for both positive and negative transients across the same two terminals, making it ideal for AC-coupled lines, differential buses (e.g., CAN, RS-485), and floating power domains. No external series components or directional routing are needed for SMBJ20CAHE3_B/H integration.
What is the thermal resistance of SMBJ20CAHE3_B/H, and how does it impact power derating?
SMBJ20CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value requires derating of its 5.0 W steady-state power dissipation above 25 °C ambient-e.g., to ~3.5 W at 60 °C ambient. The SMBJ20CAHE3_B/H's RθJA directly influences PCB copper area allocation and determines whether additional thermal vias or ground planes are necessary for sustained surge repetition rates.
Does SMBJ20CAHE3_B/H meet RoHS and halogen-free requirements?
Yes, SMBJ20CAHE3_B/H is RoHS-compliant and halogen-free, as confirmed by its "HE3" base suffix and Vishay's material categorization documentation (www.vishay.com/doc?99912). The device uses matte tin-plated leads and UL 94 V-0 molding compound, satisfying environmental compliance mandates for industrial and automotive markets. Traceability documentation and substance declarations are available upon request for SMBJ20CAHE3_B/H through Aetrix Electronics' quality portal.
SMBJ20CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ20CAHE3_B/H FAQ
1.How can I place an order for SMBJ20CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ20CAHE3_B/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 SMBJ20CAHE3_B/H reliable?
The price and inventory of SMBJ20CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ20CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ20CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ20CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ20CAHE3_B/H?
SMBJ20CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ20CAHE3_B/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 SMBJ20CAHE3_B/H?
For technical support, including SMBJ20CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ20CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ20CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ20CAHE3_B/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 SMBJ20CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ20CAHE3_B/H?
All SMBJ20CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ20CAHE3_B/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 SMBJ20CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ20CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ20CAHE3_B/H Tags
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