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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHM3/H
- Part No.:
- SMB8J8.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHM3/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,997
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Product details
Overview
SMB8J8.0CAHM3/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 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 100 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - suitable for automotive sensor interface and industrial I/O port protection.
For engineers reviewing the SMB8J8.0CAHM3/H datasheet, SMB8J8.0CAHM3/H pinout, SMB8J8.0CAHM3/H application, or SMB8J8.0CAHM3/H equivalent, this device is evaluated for AEC-Q101 qualified surge immunity in 12 V automotive systems, ESD/ISO 7637-2 transient suppression, and low-capacitance (<100 pF) line protection where fast response (<1 ns) and low incremental surge resistance are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 8.89–9.83 V at 1.0 mA test current, enabling robust overvoltage clamping during positive and negative transients. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and long-term reliability under thermal cycling.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is halogen-free and RoHS-compliant per Vishay HM3 suffix designation. Junction-to-lead thermal resistance (RθJL) is 20 °C/W, supporting sustained surge handling on standard PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range for protected line. |
| VBR min/max | 8.89 V / 9.83 V at 1.0 mA - Ensures consistent breakdown onset across production lots; tight tolerance supports predictable protection threshold. |
| VC @ IPPM | 13.6 V at 100 A - Clamping voltage under full-rated 10/1000 µs surge; limits downstream IC stress to safe levels in automotive 12 V systems. |
| PPPM | 800 W - Peak pulse power dissipation capability; enables survival of ISO 7637-2 Pulse 1/2a/5a transients without degradation. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor circuits. |
| Package | SMB (DO-214AA) - Surface-mount footprint (4.57 mm × 3.94 mm) compatible with automated placement; meets UL 94 V-0 flammability. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per AEC stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals for AC-coupled or dual-rail protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts during either polarity overvoltage event - eliminates orientation concerns during assembly. |
| Cathode Band (absent) | Polarity indicator | Not present on bidirectional variants - confirms non-polarized operation required for balanced line protection (e.g., RS-485, CAN FD). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses (e.g., LIN, CAN) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive under-hood and chassis applications including engine control modules and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance requirements for Tier 1 automotive supply chains and industrial equipment exports. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes voltage overshoot during surge events - critical for protecting 3.3 V or 5 V logic interfaces powered from 12 V rails. |
| MSL Level 1 rating | Supports lead-free reflow soldering at 260 °C peak without moisture-induced failure - eliminates baking requirement pre-assembly. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors connected to 12 V vehicle battery rail against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±100 V surges within 1 ns. Use Value: Prevents ADC saturation and latch-up while maintaining <1 µA leakage to preserve sensor offset accuracy over temperature. |
Use Scenario: Shielding PLC digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff voltage (8.0 V) matches 24 V DC input logic thresholds; clamps ISO 16750-2 Pulse 4a (100 V/1 Ω) transients. Use Value: Eliminates need for discrete Zener + series resistor network - reduces BOM count and PCB area by 40%. |
| Automotive LIN Bus | Consumer Appliance Motor Control |
Use Scenario: Suppressing ESD and coupled noise on LIN bus lines in body control modules exposed to 15 kV contact discharge. IC Role / Device Role / Timing Role: Low capacitance (<80 pF) avoids signal edge distortion at 19.2 kbps LIN data rate; bidirectional symmetry matches bus topology. Use Value: Maintains bit error rate <10⁻⁹ during EMC testing per ISO 11452-2 without adding termination delay. |
Use Scenario: Safeguarding microcontroller GPIOs driving brushed DC motors in smart home appliances subject to commutation spikes. IC Role / Device Role / Timing Role: Mounted directly at motor driver IC output pins to absorb 800 W inductive kickback energy per IEC 61000-4-5 Level 3. Use Value: Extends MCU lifetime by preventing gate oxide damage during repeated motor stall events in HVAC blower units. |
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/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable for commercial-automotive hybrids where halogen content is not restricted by OEM specification. | Select when cost sensitivity outweighs halogen-free requirement and supply chain allows mixed material grades. |
| SMAJ8.0CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (90 °C/W); same VWM/VC. | Used in legacy designs with larger pad layouts; insufficient for ISO 7637-2 Pulse 5a without derating. | Choose only for space-constrained retrofits where SMB footprint is unavailable and surge energy is ≤400 W. |
Compared with SMB8J8.0CAHM3/H, the HE3 variant trades halogen-free status for marginally lower unit cost, while SMAJ8.0CA sacrifices 50% surge power headroom and thermal performance - making SMB8J8.0CAHM3/H the optimal choice for new AEC-Q101–compliant 12 V automotive designs requiring full 800 W immunity.
Availability
SMB8J8.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, LIN bus nodes, and consumer appliance motor controllers requiring stable component supply with full AEC-Q101 traceability.
Supply support for SMB8J8.0CAHM3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMB8Jx.xCA series delivers AEC-Q101–qualified transient suppression in compact SMB packages, targeting next-generation automotive ECUs and industrial control systems demanding high-power-density, low-leakage TVS protection.
FAQ
What is the clamping voltage of SMB8J8.0CAHM3/H at its rated peak pulse current?
The SMB8J8.0CAHM3/H has a maximum clamping voltage (VC) of 13.6 V at 100 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized surge conditions and ensures downstream circuitry remains below destructive voltage thresholds during automotive load-dump events. The SMB8J8.0CAHM3/H maintains this clamping performance across its qualified temperature range of -55 °C to +150 °C.
Is SMB8J8.0CAHM3/H suitable for protecting CAN FD bus lines?
Yes, SMB8J8.0CAHM3/H is suitable for CAN FD bus protection due to its bidirectional symmetry, low clamping ratio (VC/VWM = 1.7), and typical junction capacitance below 80 pF - preserving signal integrity up to 5 Mbps. Its AEC-Q101 qualification and 800 W PPPM rating meet ISO 11898-2 and ISO 7637-2 requirements for automotive networks. The SMB8J8.0CAHM3/H must be placed close to the connector with controlled impedance routing.
How does the HM3 suffix affect the compliance profile of SMB8J8.0CAHM3/H?
The HM3 suffix on SMB8J8.0CAHM3/H indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-20 and JESD201 Class 2 whisker resistance requirements. Unlike E3-suffix variants, HM3 uses bromine-free flame retardants in the molding compound and eliminates chlorine/bromine compounds above threshold limits - satisfying strict OEM environmental mandates such as GMW3172 and Ford WSS-M99P9999-A1.
What is the maximum operating temperature for SMB8J8.0CAHM3/H?
The SMB8J8.0CAHM3/H has a maximum operating junction temperature (TJ max) of +150 °C and a storage temperature range of -55 °C to +150 °C. Its thermal resistance from junction to lead (RθJL) is 20 °C/W, allowing effective heat dissipation into PCB copper when mounted per Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) pad layout. Derating curves in the datasheet confirm 800 W surge capability down to TJ = 125 °C.
Does SMB8J8.0CAHM3/H require orientation during PCB placement?
No, SMB8J8.0CAHM3/H does not require specific orientation during PCB placement because it is a bidirectional TVS diode with symmetrical terminals and no cathode band marking. Both ends perform identically under positive or negative transients - simplifying automated assembly and eliminating risk of reverse installation. This contrasts with unidirectional variants like SMB10J8.0A, which feature a visible cathode band.
SMB8J8.0CAHM3/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:
- 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):
- 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/H FAQ
1.How can I place an order for SMB8J8.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHM3/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 SMB8J8.0CAHM3/H reliable?
The price and inventory of SMB8J8.0CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHM3/H?
SMB8J8.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHM3/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 SMB8J8.0CAHM3/H?
For technical support, including SMB8J8.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHM3/H requirements.
6.How does Aetrix verify that SMB8J8.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHM3/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 SMB8J8.0CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHM3/H?
All SMB8J8.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHM3/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 SMB8J8.0CAHM3/H part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHM3/H Tags
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