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Vishay General Semiconductor - Diodes Division SMBJ8.0CAHM3_A/H
- Part No.:
- SMBJ8.0CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CAHM3_A/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,484
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Product details
Overview
SMBJ8.0CAHM3_A/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 600 W peak pulse power (10/1000 µs), 13.6 V maximum clamping voltage at 44.1 A peak pulse current, and 8.0 V stand-off voltage - optimized for protecting sensitive ICs, MOSFETs, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the SMBJ8.0CAHM3_A/H datasheet, SMBJ8.0CAHM3_A/H pinout, SMBJ8.0CAHM3_A/H application, or SMBJ8.0CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.7), AEC-Q101 qualification status, and halogen-free RoHS compliance per Vishay HM3 suffix.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both polarities, enabling robust protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design for sustained surge handling.
The SMBJ8.0CAHM3_A/H delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with derating above 25 °C per Figure 2. Its 8.0 V stand-off voltage allows reliable operation below logic-level thresholds, and its 13.6 V clamping voltage limits stress on downstream 12 V-rated components during ESD or inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 8.0 V - Maximum continuous reverse voltage before significant leakage; sets operating margin for 5–12 V rail protection. |
| Breakdown Voltage (VBR) | 8.89–9.83 V at 1 mA - Confirmed bidirectional conduction threshold; ensures symmetric clamping onset. |
| Clamping Voltage (VC) | 13.6 V at 44.1 A - Peak voltage seen by protected circuit during 600 W transient; defines safe stress limit for downstream devices. |
| Peak Pulse Power (PPPM) | 600 W (10/1000 µs) - Standardized surge energy handling capacity; validated per ANSI/IEEE C62.35. |
| Leakage Current (ID) | ≤1.0 µA at 8.0 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| Junction Temperature Range | -55 °C to +150 °C - Supports extended industrial and automotive under-hood environments. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm) compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connected across protected line and ground (or between differential lines) without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609A Class 1 moisture sensitivity and EU RoHS Directive 2011/65/EU without brominated flame retardants. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage exposure relative to operating voltage - critical for safeguarding 3.3 V, 5 V, and 12 V logic interfaces. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: Protecting analog voltage outputs of pressure/temperature sensors from load-dump and inductive kickback in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Prevents ADC saturation and latch-up during 100 V/100 ms load dump events while maintaining ≤1 µA leakage at 8 V bias. |
Use Scenario: Safeguarding LIN bus inputs in door module ECUs exposed to battery transients and ESD in passenger compartments. IC Role / Device Role / Timing Role: Line-to-ground TVS on LIN data line, leveraging bidirectional symmetry to absorb ±100 V pulses without polarity alignment. Use Value: Ensures uninterrupted communication during ISO 7637-2 Pulse 1/2a/5a events due to 13.6 V clamping ceiling and AEC-Q101 validation. |
| Telecom Ethernet PHY Port Protection | Consumer Appliance Motor Driver Feedback Lines |
|
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY pins from lightning-induced surges in DSL gateways and VoIP adapters. IC Role / Device Role / Timing Role: Differential pair protection using two SMBJ8.0CAHM3_A/H units (line-to-line and line-to-ground) on MDI side of magnetics. Use Value: Maintains signal integrity up to 100 MHz via low capacitance (~200 pF at 0 V) and sub-ns response, meeting GR-1089-CORE Level 3 immunity. |
Use Scenario: Securing hall-effect rotor position feedback signals in BLDC motor drives within washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Point-of-entry TVS on open-collector sensor outputs subjected to commutation noise and relay coil flyback. Use Value: Eliminates false triggering in motor control ICs by limiting transient overshoot to ≤13.6 V while surviving 100 A surge current per IEC 61000-4-4. |
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_A/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3). | Lacks halogen-free certification required for some automotive Tier 1 supply chains. | Select when halogen-free content is not mandated and cost optimization is prioritized. |
| SMAJ8.0CAHM3_A/H | Lower 400 W PPPM rating; same VWM/VC but higher clamping ratio (VC/VWM = 1.88). | Insufficient for IEC 61000-4-5 Level 4; limited to lower-energy surge environments. | Choose only if board space constraints force SMA package and surge threat level is ≤Level 3. |
Compared with SMBJ8.0CAHE3_A/H, the SMBJ8.0CAHM3_A/H adds halogen-free compliance for stricter environmental programs; versus SMAJ8.0CAHM3_A/H, it provides 50 % higher surge power handling and tighter clamping - directly enabling robust protection in automotive and industrial 12 V systems.
Availability
SMBJ8.0CAHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom PHY ports, and appliance motor control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ8.0CAHM3_A/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, power efficiency, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation and 600 W surge capability are mandatory.
FAQ
What does the "HM3" suffix indicate in SMBJ8.0CAHM3_A/H?
The HM3 suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. SMBJ8.0CAHM3_A/H meets JEDEC J-STD-609A Class 1 moisture sensitivity and passes automotive stress tests including high-temperature reverse bias (HTRB) and temperature cycling - distinguishing it from commercial-grade E3 variants.
Is SMBJ8.0CAHM3_A/H suitable for protecting USB 2.0 data lines?
No - SMBJ8.0CAHM3_A/H has typical junction capacitance of ~200 pF at 0 V, which exceeds the 5–10 pF limit for USB 2.0 signal integrity. For USB data line protection, lower-capacitance TVS arrays like Vishay's USBxx series are recommended instead of SMBJ8.0CAHM3_A/H.
How does the clamping voltage of SMBJ8.0CAHM3_A/H compare to its stand-off voltage?
SMBJ8.0CAHM3_A/H has a stand-off voltage (VWM) of 8.0 V and a maximum clamping voltage (VC) of 13.6 V at 44.1 A, yielding a clamping ratio of 1.7. This tight ratio ensures protected circuits experience minimal overvoltage - critical for safeguarding 12 V logic rails and analog sensor outputs without overstressing downstream components.
Can SMBJ8.0CAHM3_A/H be used in parallel to increase surge current handling?
No - SMBJ8.0CAHM3_A/H lacks matched dynamic impedance characteristics for reliable current sharing. Parallel connection risks thermal runaway due to parameter variation; for higher IPPM, select a single higher-rated device like SMBJ12CAHM3_A/H or use external current-sharing resistors with derated total power.
What PCB layout practices maximize thermal performance for SMBJ8.0CAHM3_A/H?
Mount SMBJ8.0CAHM3_A/H on minimum 5.0 mm × 5.0 mm copper pads per terminal (per Vishay Doc. 88392 Fig. 6), use internal ground planes connected via ≥4 thermal vias per pad, and avoid narrow traces between the device and ground plane - these practices reduce RθJA from 100 °C/W toward 60 °C/W, preserving 600 W surge capability at elevated ambient temperatures.
SMBJ8.0CAHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ8.0CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CAHM3_A/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 SMBJ8.0CAHM3_A/H reliable?
The price and inventory of SMBJ8.0CAHM3_A/H 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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CAHM3_A/H?
SMBJ8.0CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CAHM3_A/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 SMBJ8.0CAHM3_A/H?
For technical support, including SMBJ8.0CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ8.0CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CAHM3_A/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 SMBJ8.0CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CAHM3_A/H?
All SMBJ8.0CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CAHM3_A/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 SMBJ8.0CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ8.0CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CAHM3_A/H Tags
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