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Vishay General Semiconductor - Diodes Division SMB8J13CAHM3_A/H
- Part No.:
- SMB8J13CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J13CAHM3_A/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,407
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Product details
Overview
SMB8J13CAHM3_A/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 13 V stand-off voltage (VWM), 21.5 V maximum clamping voltage (VC) at 37.2 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - suitable for automotive sensor interface and CAN bus line protection.
For engineers reviewing the SMB8J13CAHM3_A/H datasheet, SMB8J13CAHM3_A/H pinout, SMB8J13CAHM3_A/H application, or SMB8J13CAHM3_A/H equivalent, this device delivers AEC-Q101 qualified transient suppression for 12 V automotive systems, with verified thermal resistance (RθJL = 20 °C/W), low leakage (<1.0 µA at VWM), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced surges, and load dump transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the low incremental surge resistance supports consistent clamping performance under repetitive stress.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its 72 °C/W junction-to-ambient thermal resistance (RθJA) requires minimum 5.0 mm × 5.0 mm copper pad layout for full 800 W rating - critical for sustained surge handling in engine control units and ADAS modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min / max | 14.4 V / 15.9 V at 1.0 mA - precise breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 21.5 V at 37.2 A - clamping voltage limits downstream IC stress during 10/1000 µs surge; enables I/O protection below 24 V absolute max ratings. |
| PPPM | 800 W - peak pulse power handling capability with 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2/5a in automotive environments. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood deployment in automotive ECUs and powertrain modules. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals enable flexible PCB layout without orientation constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR - eliminates need for polarity-aware routing. |
| Cathode Band (absent) | Polarity indicator | Not present on bidirectional variants; confirms device symmetry and simplifies automated optical inspection (AOI) setup. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors - reduces qualification burden for Tier 1 suppliers. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance - ensures long-term solder joint reliability in high-vibration environments. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through energy during surges - protects sensitive transceivers and microcontrollers without requiring additional series impedance. |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without dry pack or baking - reduces manufacturing cost and cycle time for high-volume automotive production. |
| Glass-passivated junction | Provides stable VBR tolerance and low leakage over temperature and lifetime - critical for mission-critical safety systems requiring zero drift. |
Applications
| Automotive Sensor Interface | CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins to shunt transient energy before it reaches ADC input or signal conditioner. Use Value: Maintains sensor accuracy by limiting voltage excursions to ≤21.5 V during 800 W surges - prevents latch-up and parametric shift in precision front-end circuitry. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044) against ESD and coupled noise from adjacent power circuits. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS placed differential across CANH/CANL lines to suppress common-mode transients without distorting data eye. Use Value: Enables >5 Mbps CAN FD operation by maintaining signal integrity - clamps surges within 1 ns while adding <0.5 ns propagation delay. |
| Industrial PLC I/O Module | 12 V Power Rail Protection |
|
Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges in factory automation environments. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at terminal block entry point to divert surge current away from optocoupler input stages and MCU GPIOs. Use Value: Survives repeated 1 kV/500 A surge events per IEC 61000-4-5 Level 4 - extends field service life and reduces unplanned downtime. |
Use Scenario: Guarding 12 V auxiliary rails feeding infotainment head units and telematics gateways against battery disconnection spikes and jump-start transients. IC Role / Device Role / Timing Role: Primary rail-level clamp mounted upstream of DC/DC converters to prevent overvoltage damage to downstream regulators and PMICs. Use Value: Handles 100 A non-repetitive forward surge (IFSM) - absorbs energy from 12 V system load dump without failure or parameter shift. |
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/H | Same electrical specs and package, but RoHS-compliant commercial grade (E3) - no halogen-free certification or AEC-Q101 validation. | Limited to non-automotive industrial or consumer use where automotive qualification is not required. | Select when cost sensitivity outweighs automotive qualification needs and halogen-free materials are not mandated. |
| SMC8J13CAHM3_A/H | Same VWM/VC/IPPM specs but in larger SMC (DO-214AB) package - higher RθJA (50 °C/W vs. 72 °C/W) and 1500 W PPPM rating. | Better suited for higher-power 24 V systems or applications requiring greater thermal margin under sustained surge conditions. | Choose when board space allows larger footprint and system-level surge requirements exceed 800 W - e.g., heavy-duty truck ECUs. |
Compared with SMB8J13CAHM3_A/H, the HE3 variant lacks AEC-Q101 validation and halogen-free status, while the SMC8J13CAHM3_A/H offers higher power handling in a larger package - making SMB8J13CAHM3_A/H the optimal balance of automotive compliance, thermal efficiency, and compact SMB footprint for 12 V embedded systems.
Availability
SMB8J13CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and CAN-based communication systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SMB8J13CAHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8JxxCA family delivers AEC-Q101 qualified TVS diodes optimized for 12 V and 24 V automotive subsystems - engineered to meet stringent ISO 7637-2 and ISO 16750-2 surge immunity requirements.
FAQ
What is the clamping voltage of SMB8J13CAHM3_A/H at its rated peak pulse current?
The SMB8J13CAHM3_A/H has a maximum clamping voltage (VC) of 21.5 V at its specified peak pulse current (IPPM) of 37.2 A with a 10/1000 µs waveform. This value is measured under standardized test conditions and ensures predictable overvoltage limiting for protected circuits - a key parameter confirmed in Vishay's Document Number 88422, page 3, bidirectional table.
Is SMB8J13CAHM3_A/H suitable for automotive applications?
Yes, SMB8J13CAHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - explicitly certified for automotive use per Vishay's ordering nomenclature and qualification documentation. It meets requirements for engine control, body electronics, and ADAS modules where reliability under thermal and mechanical stress is critical.
What does the "HM3" suffix mean in SMB8J13CAHM3_A/H?
The "HM3" suffix in SMB8J13CAHM3_A/H denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance - distinguishing it from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS) variants. This suffix is defined in Vishay's ordering information table (page 3 of Doc. 88422) and confirms compliance with automotive material restrictions and long-term solder joint integrity standards.
How does SMB8J13CAHM3_A/H differ from unidirectional SMB10J13A variants?
SMB8J13CAHM3_A/H is bidirectional with symmetrical clamping in both polarities and no cathode band, whereas SMB10J13A is unidirectional with cathode-marked polarity and higher 1000 W PPPM rating. The "8" prefix indicates 800 W bidirectional rating, "10" indicates 1000 W unidirectional rating - confirmed in Vishay's primary characteristics table (page 1) and electrical characteristics tables (pages 2–3).
What is the thermal resistance from junction to lead (RθJL) for SMB8J13CAHM3_A/H?
The SMB8J13CAHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in the Thermal Characteristics section (page 4) of Vishay Document Number 88422. This low value enables efficient heat transfer to PCB copper pads and supports reliable operation under repeated surge conditions in thermally constrained automotive layouts.
SMB8J13CAHM3_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):
- 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/H FAQ
1.How can I place an order for SMB8J13CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J13CAHM3_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 SMB8J13CAHM3_A/H reliable?
The price and inventory of SMB8J13CAHM3_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 SMB8J13CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J13CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J13CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J13CAHM3_A/H?
SMB8J13CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J13CAHM3_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 SMB8J13CAHM3_A/H?
For technical support, including SMB8J13CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J13CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J13CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J13CAHM3_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 SMB8J13CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J13CAHM3_A/H?
All SMB8J13CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J13CAHM3_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 SMB8J13CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J13CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J13CAHM3_A/H Tags
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