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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHM3_A/I
- Part No.:
- SMB8J8.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,280
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Product details
Overview
SMB8J8.0CAHM3_A/I 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 8.0 V stand-off voltage (VWM), 13.6 V clamping voltage (VC) at 100 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J8.0CAHM3_A/I datasheet, SMB8J8.0CAHM3_A/I pinout, SMB8J8.0CAHM3_A/I application, or SMB8J8.0CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1.0 μA max reverse leakage at VWM, MSL Level 1 compliance, and halogen-free RoHS-compliant construction per HM3 suffix.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage, it avalanches near its breakdown voltage (VBR = 8.89–9.83 V at 1.0 mA) to divert surge current away from downstream circuitry. Its low incremental surge resistance and fast response time (<1 ns) ensure minimal let-through voltage during ESD or lightning-induced transients.
Designed for automotive-grade reliability, SMB8J8.0CAHM3_A/I meets AEC-Q101 stress testing requirements and supports operation from −55 °C to +150 °C junction temperature. The glass-passivated junction and matte tin-plated leads comply with J-STD-002 solderability and JESD22-B102 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.89 V / 9.83 V at 1.0 mA - ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 13.6 V at 100 A - limits worst-case voltage seen by protected IC during 10/1000 μs surge |
| PPPM | 800 W - sustains high-energy transients without failure per IEC 61000-4-5 Level 4 |
| ID @ VWM | ≤1.0 μA - negligible standby leakage, critical for low-power sensor nodes |
| TJ max | +150 °C - enables under-hood automotive deployment without derating |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and 0.2" × 0.2" copper pad layout |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package: anode and cathode are symmetrical; no polarity marking required. Case dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals accept reflow soldering up to 260 °C peak per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | Connects to line being protected; forms bidirectional conduction path with cathode |
| Cathode | Surge current entry (negative half-cycle) | Paired with anode to enable symmetric clamping for AC or differential signals |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - eliminates bake-out prior to SMT assembly |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through energy during surge events, reducing stress on downstream MOSFETs or MCUs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and ground to limit transient voltage excursion. Use Value: Enables robust operation in 12 V/24 V vehicle systems with VWM = 8.0 V and VC = 13.6 V - well below typical 16 V absolute max ratings of interface ICs. | Use Scenario: Safeguarding digital input modules against induced surges from relay coil switching and motor drive noise in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected TVS across isolated input optocoupler or ADC front-end to absorb 1 kV/500 A transients. Use Value: 800 W PPPM rating and 100 A IPPM support repeated surge exposure per IEC 61000-4-4 Level 4 without degradation. |
| USB Port ESD Protection | Power Supply Rail Clamping |
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines (D+/D−) in infotainment head units and telematics gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary common-mode choke to suppress ±15 kV contact discharge. Use Value: Sub-1 μA leakage at 8.0 V preserves signal integrity and prevents false triggering in high-impedance receiver circuits. | Use Scenario: Overvoltage clamping on 5 V or 3.3 V auxiliary rails feeding microcontrollers and communication peripherals. IC Role / Device Role / Timing Role: Shunt element that activates only during overvoltage events (e.g., regulator fault, hot-swap inrush), not during normal operation. Use Value: Precise 8.0 V VWM allows safe margin below 8.5 V brown-out thresholds while clamping to 13.6 V to prevent latch-up in downstream silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J8.0CAHE3_A/I | RoHS-compliant but not halogen-free; lacks HM3 material certification | Approved for commercial/industrial use; not certified for automotive under AEC-Q101 | Select when halogen-free requirement is waived and cost sensitivity outweighs automotive qualification needs |
| SMAJ8.0CA-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs | Suitable for space-constrained consumer PCBs but insufficient for automotive load-dump immunity | Choose for non-automotive designs where board area is critical and surge energy is ≤400 W |
Compared with SMB8J8.0CAHM3_A/I, SMB8J8.0CAHE3_A/I offers identical electrical performance but omits halogen-free compliance and AEC-Q101 validation, while SMAJ8.0CA-M3 reduces surge handling by 50 % and shrinks footprint - making SMB8J8.0CAHM3_A/I the sole option meeting full automotive-grade surge, material, and reliability requirements.
Availability
SMB8J8.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and USB interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMB8J8.0CAHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMB8Jx.xCA series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for AEC-Q101-compliant surge suppression in harsh automotive and industrial environments where bidirectional clamping and thermal robustness are mandatory.
FAQ
What is the clamping voltage of SMB8J8.0CAHM3_A/I at its rated peak pulse current?
The SMB8J8.0CAHM3_A/I has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 100 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during surge events - a critical parameter for protecting downstream ICs with 16 V absolute maximum ratings. The SMB8J8.0CAHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMB8J8.0CAHM3_A/I suitable for automotive applications?
Yes, SMB8J8.0CAHM3_A/I is explicitly AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It supports junction temperatures from −55 °C to +150 °C and is rated for load dump and ISO 7637-2 pulse immunity in 12 V and 24 V systems. The SMB8J8.0CAHM3_A/I is commonly deployed in engine control modules, body electronics, and ADAS sensor interfaces where reliability under thermal and electrical stress is essential.
What does the "HM3" suffix mean in SMB8J8.0CAHM3_A/I?
The "HM3" suffix in SMB8J8.0CAHM3_A/I denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations and JEDEC J-STD-020 MSL Level 1 handling requirements. Unlike base "E3" parts, HM3 devices exclude brominated flame retardants and antimony trioxide, satisfying strict automotive OEM substance restrictions. This designation confirms the SMB8J8.0CAHM3_A/I is approved for use in vehicles requiring full material compliance documentation and zero-halogen content.
How does SMB8J8.0CAHM3_A/I differ from unidirectional variants like SMB10J8.0A?
SMB8J8.0CAHM3_A/I is bidirectional with symmetrical clamping for AC or differential signals, whereas SMB10J8.0A is unidirectional and conducts only in reverse bias. SMB8J8.0CAHM3_A/I delivers 800 W peak pulse power and 100 A IPPM, while SMB10J8.0A provides 1000 W and 73.5 A - reflecting different surge energy priorities. The SMB8J8.0CAHM3_A/I uses a dual-junction structure enabling protection on both polarities without external circuitry, unlike the unidirectional SMB10J8.0A which requires careful orientation during placement.
What is the maximum reverse leakage current for SMB8J8.0CAHM3_A/I at its stand-off voltage?
The SMB8J8.0CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its stand-off voltage (VWM) of 8.0 V, measured at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and minimizes power loss in battery-powered automotive modules. The specification remains valid across the full −55 °C to +125 °C ambient operating range, with leakage increasing predictably per datasheet derating curves - ensuring consistent behavior in real-world under-hood conditions.
SMB8J8.0CAHM3_A/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:
- 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):
- 58.8A
- 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)
SMB8J8.0CAHM3_A/I FAQ
1.How can I place an order for SMB8J8.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHM3_A/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 SMB8J8.0CAHM3_A/I reliable?
The price and inventory of SMB8J8.0CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J8.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHM3_A/I?
SMB8J8.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHM3_A/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 SMB8J8.0CAHM3_A/I?
For technical support, including SMB8J8.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J8.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHM3_A/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 SMB8J8.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHM3_A/I?
All SMB8J8.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHM3_A/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 SMB8J8.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHM3_A/I Tags
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