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Vishay General Semiconductor - Diodes Division SMB8J36CAHM3/I
- Part No.:
- SMB8J36CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHM3/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,603
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Product details
Overview
SMB8J36CAHM3/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 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 13.8 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 SMB8J36CAHM3/I datasheet, SMB8J36CAHM3/I pinout, SMB8J36CAHM3/I application, or SMB8J36CAHM3/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix - critical for under-hood automotive ECUs and harsh-environment industrial controllers.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive load switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repeated surges.
Designed for bidirectional operation, SMB8J36CAHM3/I protects AC-coupled or floating signal paths without polarity constraints. It meets ANSI/IEEE C62.35 standards for surge suppression and is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance RθJL = 20 °C/W to lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal swing range in protected circuit. |
| VBR min/max | 40.0 V / 44.2 V at IT = 1 mA - tight breakdown window ensures predictable turn-on threshold for transient suppression. |
| VC @ IPPM | 58.1 V at 13.8 A - clamping voltage during 10/1000 µs surge; limits downstream voltage stress to ≤58.1 V. |
| PPPM | 800 W - peak pulse power handling capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at stand-off voltage; preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - extended junction temperature rating enables use in engine bay or industrial enclosures without derating. |
| Package | SMB (DO-214AA) - surface-mount package with 5.59 mm × 4.06 mm footprint, optimized for automated placement and thermal dissipation via copper pads. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow). Bidirectional construction means no cathode marking; terminals are symmetrical and non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals serve identically as surge current entry/exit points; no polarity dependency enables universal placement on differential or AC lines. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad layout (0.2" × 0.2") required for rated PPPM and thermal management per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, chassis, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and global environmental mandates without compromising surge robustness or solderability. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to downstream ICs - critical for protecting 3.3 V or 5 V logic interfaces connected to 24 V industrial buses. |
| Fast response time (<1 ps) | Clamps transients before propagation into sensitive analog front-ends or microcontroller GPIOs - essential for CAN FD, LIN, and sensor signal conditioning. |
| MSL Level 1, 260 °C peak | Enables standard SMT reflow without pre-baking; eliminates moisture-related popcorning risk during manufacturing. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs in engine control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before reaching ASIC or MCU input pins. Use Value: Maintains signal fidelity under 100 V/10 ms load dump events while meeting AEC-Q101 lifetime requirements for 15-year vehicle service life. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional clamping device installed across input terminals to divert surge energy to ground without affecting steady-state logic levels. Use Value: Enables >100,000 surge cycles at 800 W without parameter drift, reducing field failure rates in factory automation systems. |
| Automotive Body Control Module (BCM) | Telecom Line Interface Protection |
|
Use Scenario: Securing door module switches and ambient light sensor inputs against ESD (IEC 61000-4-2 ±8 kV contact) and battery reverse connection transients. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of ESD protection diodes and filtering RC networks on BCM PCBs. Use Value: Provides first-line defense with sub-nanosecond response, preventing latch-up or gate oxide damage in 40 nm CMOS sensor signal chains. |
Use Scenario: Protecting Ethernet PHY line drivers and PoE injectors from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Secondary surge clamp used in conjunction with GDTs and common-mode chokes to limit differential-mode overvoltage on twisted-pair lines. Use Value: Delivers 58.1 V clamping at 13.8 A - compatible with IEEE 802.3af/at voltage tolerances and reduces need for oversized downstream components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J36CAHE3/I | Same electrical specs, but RoHS-compliant (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Approved for commercial-grade industrial and consumer applications only; not suitable for automotive production. | Select when halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMAJ36CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VC. | Limited to lower-energy surge environments; less suitable for space-constrained automotive PCBs due to larger footprint. | Choose only if cost is primary driver and 800 W rating is not required; verify thermal margin with reduced copper area. |
Compared with SMB8J36CAHM3/I, SMB8J36CAHE3/I lacks automotive qualification and halogen-free status, while SMAJ36CA sacrifices 50% pulse power and thermal efficiency in a larger package - making SMB8J36CAHM3/I the optimal choice for AEC-Q101–mandated, high-density, high-surge industrial and automotive designs.
Availability
SMB8J36CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J36CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101–qualified surge protection in automotive and industrial environments where compact size and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMB8J36CAHM3/I at its rated peak pulse current?
The SMB8J36CAHM3/I has a maximum clamping voltage (VC) of 58.1 V at 13.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during surge events. The clamping performance is guaranteed across the full operating temperature range of –55 °C to +150 °C.
Is SMB8J36CAHM3/I suitable for automotive applications?
Yes, SMB8J36CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - explicitly intended for automotive use. It meets stringent requirements for under-hood and chassis-mounted modules, including thermal cycling, humidity resistance, and long-term surge endurance. The datasheet confirms qualification per AEC-Q101 Rev D with full test reports available upon request.
What does the "HM3" suffix mean in SMB8J36CAHM3/I?
The "HM3" suffix in SMB8J36CAHM3/I denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 rating (260 °C peak reflow). It distinguishes this variant from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS) versions. HM3 ensures compliance with automotive OEM material declarations and eliminates brominated flame retardants without sacrificing electrical or thermal performance.
How does SMB8J36CAHM3/I differ from unidirectional TVS diodes like SMB10J36A?
SMB8J36CAHM3/I is bidirectional with symmetrical breakdown in both polarities, making it ideal for AC-coupled or floating signal lines such as LIN, CAN, or telecom pairs. In contrast, SMB10J36A is unidirectional (cathode-marked), suited for DC rails or grounded signal paths. SMB8J36CAHM3/I offers 800 W PPPM vs. 1000 W for SMB10J36A, but provides polarity-agnostic protection where reverse-voltage transients are possible - a key distinction in automotive sensor and communication interfaces.
What PCB layout guidance applies to SMB8J36CAHM3/I for optimal surge performance?
For rated 800 W peak pulse power, SMB8J36CAHM3/I requires mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet Figure 2. Thermal vias under pads and internal ground planes improve heat dissipation. Avoid narrow traces between the device and protected node - keep them short and wide to minimize inductance and preserve clamping speed. The SMB (DO-214AA) outline drawing specifies exact pad dimensions and spacing for automated assembly.
SMB8J36CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- 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)
SMB8J36CAHM3/I FAQ
1.How can I place an order for SMB8J36CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHM3/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 SMB8J36CAHM3/I reliable?
The price and inventory of SMB8J36CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J36CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHM3/I?
SMB8J36CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHM3/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 SMB8J36CAHM3/I?
For technical support, including SMB8J36CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHM3/I requirements.
6.How does Aetrix verify that SMB8J36CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHM3/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 SMB8J36CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHM3/I?
All SMB8J36CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHM3/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 SMB8J36CAHM3/I part is unused and in its original packaging.
Return procedure for SMB8J36CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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