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Vishay General Semiconductor - Diodes Division SMB8J5.0CAHM3_B/H
- Part No.:
- SMB8J5.0CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CAHM3_B/H.pdf
- Description:
- 800W,5.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,983
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Product details
Overview
SMB8J5.0CAHM3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 5.0 V stand-off voltage (VWM), 6.4–7.25 V breakdown voltage (VBR) at 10 mA, 800 W peak pulse power (PPPM), and clamps transients to ≤9.2 V at 2000 A (10/1000 µs). It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the SMB8J5.0CAHM3_B/H datasheet, SMB8J5.0CAHM3_B/H pinout, SMB8J5.0CAHM3_B/H application, or SMB8J5.0CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, 800 W surge rating at 10/1000 µs, AEC-Q101 qualification, low clamping voltage (≤9.2 V), and compatibility with automated SMT placement on SMB footprint.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, leveraging an avalanche breakdown mechanism across both polarities. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The SMB8J5.0CAHM3_B/H delivers 2000 A peak pulse current (IPPM) under 10/1000 µs waveform with ≤9.2 V clamping voltage - critical for protecting downstream 5 V logic interfaces. Its thermal resistance (RθJL = 20 °C/W) enables reliable operation up to TJ = +150 °C in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before clamping begins; matches standard 5 V supply rails. |
| VBR min/max | 6.40 V / 7.25 V at IT = 10 mA - tight breakdown window ensures predictable turn-on without false triggering. |
| VC @ IPPM | ≤9.2 V at IPPM = 2000 A (10/1000 µs) - limits protected circuit voltage stress during worst-case surge. |
| PPPM | 800 W - peak transient energy handling capacity per IEC 61000-4-5 surge test conditions. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - supports under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); polarity unmarked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No polarity marking required; identical clamping behavior for positive and negative transients. |
| Case (body) | Thermal and mechanical anchor | Direct thermal path to copper pads; RθJL = 20 °C/W enables efficient heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional TVS architecture | Protects AC-coupled and differential signal lines (e.g., CAN, LIN, sensor bridges) without polarity constraints. |
| 800 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 5 V bus systems with margin. |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling. |
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point before signal conditioning IC. Use Value: Limits transient voltage to ≤9.2 V, preventing latch-up or gate oxide damage in downstream 5 V op-amps and ADCs. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subjected to ground bounce and EFT bursts. IC Role / Device Role / Timing Role: Common-mode surge suppressor across A/B differential pair and GND, rated for ±15 kV ESD (IEC 61000-4-2). Use Value: Maintains signal integrity by clamping common-mode spikes below transceiver absolute maximum ratings (±12 V). |
| Consumer USB-C Port | Smart Meter Power Input |
|
Use Scenario: Guarding VBUS and CC lines in portable chargers against hot-plug transients and cable ESD events. IC Role / Device Role / Timing Role: Low-capacitance (CJ < 100 pF at 0 V) bidirectional clamp integrated into USB-C receptacle layout. Use Value: Enables full-speed USB 2.0 signaling while suppressing >8 kV contact ESD without data corruption. |
Use Scenario: Surge suppression on 230 VAC-derived 5 V auxiliary supply feeding metrology SoCs in smart electricity meters. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, absorbing residual energy from 10/700 µs telecom surges per IEC 61000-4-5. Use Value: Prevents brownout or reset events in metering ICs by limiting input rail excursion to <9.2 V during 1 kV surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J5.0CAHE3_B/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when AEC-Q101 is not required and cost optimization is prioritized over halogen-free compliance. |
| SMAJ5.0CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR. | Limited to lower-energy surges; unsuitable for automotive load dump or IEC 61000-4-5 Level 4. | Choose only for space-constrained non-automotive designs where 400 W surge rating suffices. |
Compared with SMB8J5.0CAHE3_B/H, the SMB8J5.0CAHM3_B/H adds halogen-free construction and AEC-Q101 validation - essential for Tier 1 automotive BOMs. Against SMAJ5.0CA, it provides double the surge power and superior thermal performance, enabling robust protection in high-reliability 5 V systems.
Availability
SMB8J5.0CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer USB-C port hardening, and smart meter auxiliary supply stabilization requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J5.0CAHM3_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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMB8J5.0CAHM3_B/H belongs to Vishay's TRANSZORB® family - engineered specifically for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and infrastructure applications demanding AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMB8J5.0CAHM3_B/H at its rated peak pulse current?
The SMB8J5.0CAHM3_B/H clamps to a maximum of 9.2 V at its peak pulse current (IPPM) of 2000 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for 5 V circuits protected by SMB8J5.0CAHM3_B/H.
Is SMB8J5.0CAHM3_B/H suitable for automotive applications?
Yes, SMB8J5.0CAHM3_B/H is AEC-Q101 qualified (denoted by the HM3 suffix) and rated for operation from −55 °C to +150 °C. Its construction - halogen-free, glass-passivated junction, and MSL Level 1 - meets automotive manufacturing and under-hood environmental requirements, making SMB8J5.0CAHM3_B/H appropriate for engine control units, ADAS sensors, and body electronics.
How does SMB8J5.0CAHM3_B/H differ from unidirectional variants like SMB10J5.0A?
SMB8J5.0CAHM3_B/H is bidirectional with symmetrical clamping for both polarities and 800 W PPPM, whereas SMB10J5.0A is unidirectional with 1000 W PPPM and cathode band marking. The "8" in SMB8J denotes 800 W rating; "10" indicates 1000 W. SMB8J5.0CAHM3_B/H is selected when AC or differential signals require polarity-agnostic protection - unlike SMB10J5.0A, which protects DC rails only.
What is the mounting pad layout recommendation for SMB8J5.0CAHM3_B/H?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for SMB8J5.0CAHM3_B/H to achieve rated 2000 A surge current and thermal performance. Pad dimensions must follow DO-214AA outline: 2.18 mm min width, 5.59 mm ref length. Deviation reduces IPPM and increases junction temperature - critical for SMB8J5.0CAHM3_B/H reliability in high-surge environments.
Does SMB8J5.0CAHM3_B/H meet RoHS and halogen-free standards?
Yes, SMB8J5.0CAHM3_B/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction per Vishay's material categorization (Doc. 99912). It contains no brominated flame retardants or chlorine-based compounds, satisfying strict environmental mandates for automotive and industrial end equipment where SMB8J5.0CAHM3_B/H is deployed.
SMB8J5.0CAHM3_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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 5V
- Current - Peak Pulse (10/1000µs):
- 87A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J5.0CAHM3_B/H FAQ
1.How can I place an order for SMB8J5.0CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CAHM3_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 SMB8J5.0CAHM3_B/H reliable?
The price and inventory of SMB8J5.0CAHM3_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 SMB8J5.0CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CAHM3_B/H?
SMB8J5.0CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CAHM3_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 SMB8J5.0CAHM3_B/H?
For technical support, including SMB8J5.0CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J5.0CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CAHM3_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 SMB8J5.0CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CAHM3_B/H?
All SMB8J5.0CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CAHM3_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 SMB8J5.0CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMB8J5.0CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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