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Vishay General Semiconductor - Diodes Division SMB8J13CAHM3_A/I
- Part No.:
- SMB8J13CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J13CAHM3_A/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,484
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Product details
Overview
SMB8J13CAHM3_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 a 13 V standoff voltage (VWM), 21.5 V clamping voltage (VC) at 37.2 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 SMB8J13CAHM3_A/I datasheet, SMB8J13CAHM3_A/I pinout, SMB8J13CAHM3_A/I application, or SMB8J13CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.65), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown junction to limit reverse voltage across protected circuitry. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing - critical for automotive under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 14.4 V min / 15.9 V max at 1 mA - ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC (Clamping Voltage) | 21.5 V at IPPM = 37.2 A - limits transient-induced voltage stress on downstream ICs such as CAN transceivers or microcontrollers. |
| PPPM (Peak Pulse Power) | 800 W (10/1000 µs) - sustains high-energy surges like ISO 7637-2 Pulse 1/2a/5a in automotive applications. |
| ID (Leakage Current) | 1.0 µA max at VWM - negligible standby power loss and minimal signal distortion in high-impedance sensor circuits. |
| TJ max | +150 °C - supports under-hood automotive placement and extended industrial temperature operation. |
| AEC-Q101 Qualified | Yes - 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 terminals solderable per J-STD-002. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band not marked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking required; interchangeable connection for AC or differential line protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of balanced lines (e.g., RS-485, CAN bus) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage exposure to sensitive 3.3 V or 5 V logic while maintaining margin against false trigger. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard lead-free SMT processes. |
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient voltage to ≤21.5 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends and op-amps operating at ±15 V supply rails. |
Use Scenario: Surge suppression on half-duplex RS-485 data lines in factory automation PLCs connected to long cable runs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage limiter placed directly at connector entry point. Use Value: Maintains signal integrity below 25 V common-mode swing threshold while surviving 4 kV EFT bursts per IEC 61000-4-4. |
| Consumer USB-C Port Protection | Power Supply Input Stage |
Use Scenario: Secondary-level transient protection on VBUS and CC lines of USB-C receptacles in portable docking stations. IC Role / Device Role / Timing Role: Standby-mode leakage-limited (≤1 µA) clamp activated only during >13 V overvoltage events. Use Value: Complies with USB PD 3.1 voltage tolerance requirements while adding <0.5 mm² PCB area vs. discrete solutions. |
Use Scenario: Input rail protection for 24 V DC-DC converters in building HVAC controllers subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge shunt absorbing 800 W pulses before upstream fuse interruption. Use Value: Extends converter MTBF by reducing MOSFET gate oxide stress and preventing bootstrap capacitor overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J13CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; uses standard tin plating instead of matte tin. | Approved for commercial/industrial use but lacks halogen-free certification required for some automotive Tier 1 programs. | Select when halogen-free compliance is not mandated and cost optimization is prioritized. |
| SMAJ13CA-M3/86A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (23.2 V), same VWM (13 V). | Suitable for space-constrained consumer designs but insufficient for automotive load dump per ISO 16750-2. | Choose only for non-automotive applications where board area is critical and surge energy is ≤400 W. |
Compared with SMB8J13CAHM3_A/I, SMB8J13CAHE3_A/I offers identical surge performance with reduced environmental compliance, while SMAJ13CA-M3/86A trades power handling and thermal robustness for footprint reduction - making the HM3 variant optimal for AEC-Q101–mandated, high-reliability deployments.
Availability
SMB8J13CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and USB-C power delivery protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J13CAHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101–compliant transient suppression in harsh-environment vehicle subsystems and ruggedized industrial controls.
FAQ
What is the clamping voltage of SMB8J13CAHM3_A/I at its rated peak pulse current?
The SMB8J13CAHM3_A/I has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current (IPPM) of 37.2 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream ICs remain within safe operating voltage limits during surge events.
Is SMB8J13CAHM3_A/I suitable for automotive applications?
Yes, SMB8J13CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its thermal rating (TJ max = +150 °C), MSL Level 1 reflow compatibility, and validation against automotive surge standards (e.g., ISO 7637-2) make it appropriate for engine control, body electronics, and ADAS sensor protection.
How does the bidirectional configuration of SMB8J13CAHM3_A/I affect PCB layout?
The SMB8J13CAHM3_A/I has no polarity marking and symmetrical terminals, eliminating orientation constraints during placement. This simplifies layout for differential or AC-coupled signals (e.g., CAN, RS-485), reduces assembly errors, and avoids the need for dual unidirectional devices or external biasing networks.
What is the standoff voltage (VWM) and why is it critical for SMB8J13CAHM3_A/I selection?
The SMB8J13CAHM3_A/I has a VWM of 13 V - the maximum continuous reverse voltage it can withstand without clamping. This parameter must exceed the system's normal operating voltage (e.g., 12 V automotive battery rail) to prevent leakage-induced power loss or false triggering, while leaving sufficient margin for ripple and tolerance.
Does SMB8J13CAHM3_A/I require heatsinking in typical applications?
No dedicated heatsink is required for SMB8J13CAHM3_A/I under single-pulse conditions, as its RθJA = 72 °C/W and thermal mass suffice for transient dissipation. However, PCB layout must follow Vishay's recommended 5.0 mm × 5.0 mm copper pad per terminal to achieve rated PPPM and avoid localized overheating during repetitive surges.
SMB8J13CAHM3_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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 37.2A
- 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)
SMB8J13CAHM3_A/I FAQ
1.How can I place an order for SMB8J13CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J13CAHM3_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 SMB8J13CAHM3_A/I reliable?
The price and inventory of SMB8J13CAHM3_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 SMB8J13CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J13CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J13CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J13CAHM3_A/I?
SMB8J13CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J13CAHM3_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 SMB8J13CAHM3_A/I?
For technical support, including SMB8J13CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J13CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J13CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J13CAHM3_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 SMB8J13CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J13CAHM3_A/I?
All SMB8J13CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J13CAHM3_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 SMB8J13CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J13CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J13CAHM3_A/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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