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Vishay General Semiconductor - Diodes Division SMBJ8.0CAHM3/I
- Part No.:
- SMBJ8.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CAHM3/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,790
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Product details
Overview
SMBJ8.0CAHM3/I 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 600 W peak pulse power (10/1000 µs), 8.0 V stand-off voltage (VWM), and clamps to ≤13.6 V at 44.1 A peak surge current - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ8.0CAHM3/I datasheet, SMBJ8.0CAHM3/I pinout, SMBJ8.0CAHM3/I application, or SMBJ8.0CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay HM3 suffix.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
Designed for PCB-level ESD and surge protection, it supports operation from −55 °C to +150 °C junction temperature and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 8.89 V / 9.83 V at 1 mA - guaranteed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | ≤13.6 V at 44.1 A - clamped voltage during 600 W transient, defining worst-case downstream overvoltage |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform, critical for IEC 61000-4-5 Level 3/4 compliance |
| IPPM | 44.1 A - maximum non-repetitive surge current supported without degradation |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for standard SMT reflow without dry pack |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetric anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative transients relative to cathode reference |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive transients relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified (HM3) | Validated for automotive electronics including BCM, lighting control, and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| 600 W peak pulse rating | Supports IEC 61000-4-5 4 kV/2 Ω surge testing with margin for system-level robustness |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes stress on downstream ICs compared to higher-ratio TVS devices |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting RS-485/RS-422 differential data lines in factory automation PLCs against EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential pair, referenced to local ground plane. Use Value: Limits transient overvoltage to ≤13.6 V, preserving signal integrity and preventing damage to isolated transceivers such as ADM2483. |
Use Scenario: Safeguarding LIN bus communication lines between door modules and central gateway units. IC Role / Device Role / Timing Role: Line-to-ground TVS on LIN signal trace, installed adjacent to connector entry point. Use Value: Withstands ISO 7637-2 Pulse 1/2a/3a transients and meets AEC-Q101 stress test requirements for automotive grade reliability. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive |
Use Scenario: Clamping induced surges on 12 V DC input of VoIP phone power supply due to PoE injector switching noise. IC Role / Device Role / Timing Role: Primary-stage unidirectional/bidirectional TVS across input rail and chassis ground. Use Value: 600 W rating absorbs multiple 10/1000 µs events without derating, supporting UL 497B recognized protector classification. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in smart washing machine control boards. IC Role / Device Role / Timing Role: Bidirectional TVS across motor terminals to clamp both forward and reverse flyback spikes. Use Value: Fast <1 ns response captures high-dI/dt transients before MOSFET body diodes conduct, reducing thermal stress on half-bridge drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial equipment where automotive qualification is unnecessary | Select when cost sensitivity outweighs halogen-free or automotive compliance requirements |
| SMAJ8.0CAHM3 | Lower 400 W PPPM; same VWM/VC; SMA (DO-214AC) package with smaller footprint and lower thermal mass | Used in space-constrained consumer electronics where 600 W surge margin is not required | Choose only if board layout restricts SMB footprint and system-level surge testing is ≤2 kV |
Compared with SMBJ8.0CAHM3/I, the HE3/I variant trades halogen-free content and automotive qualification for lower cost, while the SMAJ8.0CAHM3 reduces surge capacity and thermal robustness to fit tighter layouts - neither offers drop-in replacement without verifying layout clearance and system-level immunity margins.
Availability
SMBJ8.0CAHM3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power input stages requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ8.0CAHM3/I 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 performance.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems demanding AEC-Q101 validation and UL recognition.
FAQ
What is the clamping voltage of SMBJ8.0CAHM3/I at its rated peak pulse current?
The SMBJ8.0CAHM3/I clamps to a maximum of 13.6 V when subjected to its rated peak pulse current of 44.1 A (10/1000 µs waveform). This value is specified in the Vishay datasheet Document Number 88392, page 2, and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ8.0CAHM3/I suitable for automotive applications?
Yes, SMBJ8.0CAHM3/I is AEC-Q101 qualified (confirmed by HM3 suffix), making it suitable for automotive applications including body control modules, LIN bus protection, and power distribution units. Its construction meets JESD201 Class 2 whisker resistance, MSL Level 1, and operates reliably from −55 °C to +150 °C - fulfilling key requirements for under-hood and cabin-mounted ECUs.
Does SMBJ8.0CAHM3/I have polarity markings on the package?
No, SMBJ8.0CAHM3/I is a bidirectional TVS diode and carries no polarity marking on the SMB (DO-214AA) package. Unlike unidirectional variants (e.g., SMBJ8.0A), it functions identically in either orientation - simplifying placement and eliminating risk of reverse installation during automated assembly.
What is the meaning of the "HM3" suffix in SMBJ8.0CAHM3/I?
The "HM3" suffix in SMBJ8.0CAHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, but not halogen-free). The "I" denotes 13-inch tape-and-reel packaging (3200 units per reel), per Vishay's ordering nomenclature in Document 88392, page 3.
How does SMBJ8.0CAHM3/I compare to unidirectional SMBJ8.0A in terms of circuit protection?
SMBJ8.0CAHM3/I provides symmetrical clamping for AC or floating signals, whereas SMBJ8.0A protects only positive-going transients relative to cathode. For bidirectional threats like ESD on USB D+/D− or LIN bus, SMBJ8.0CAHM3/I eliminates need for dual-diode configurations. Its VBR (8.89–9.83 V) and VC (≤13.6 V) match the unidirectional part's positive quadrant, but extends protection to negative excursions - confirmed in Vishay's "DEVICES FOR BIDIRECTION APPLICATIONS" section.
SMBJ8.0CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- 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)
SMBJ8.0CAHM3/I FAQ
1.How can I place an order for SMBJ8.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CAHM3/I 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 SMBJ8.0CAHM3/I reliable?
The price and inventory of SMBJ8.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CAHM3/I?
SMBJ8.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CAHM3/I 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 SMBJ8.0CAHM3/I?
For technical support, including SMBJ8.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CAHM3/I requirements.
6.How does Aetrix verify that SMBJ8.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CAHM3/I 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 SMBJ8.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CAHM3/I?
All SMBJ8.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CAHM3/I, 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 SMBJ8.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ8.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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