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Vishay General Semiconductor - Diodes Division SMB8J36CAHM3_B/I
- Part No.:
- SMB8J36CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHM3_B/I.pdf
- Description:
- 800W,36V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,050
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Product details
Overview
SMB8J36CAHM3_B/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 power and signal lines. It features a 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V 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_B/I datasheet, SMB8J36CAHM3_B/I pinout, SMB8J36CAHM3_B/I application, or SMB8J36CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 0.2" × 0.2" copper pad layout per JEDEC standards.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping under repetitive surges up to 150 °C junction temperature.
The device complies with ANSI/IEEE C62.35 for transient suppression and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its bidirectional symmetry eliminates polarity concerns in AC-coupled or differential bus lines such as CAN FD physical layer or automotive LIN transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - verified breakdown range ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | 58.1 V at 13.8 A - clamping voltage limits downstream IC stress during 10/1000 µs surge; critical for protecting 3.3 V or 5 V logic rails |
| PPPM | 800 W - peak pulse power handling capacity with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity |
| IR @ VWM | 1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures without derating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional construction eliminates cathode/anode identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient shunt path | Both terminals function identically; connects across protected line and ground (or between differential lines) to clamp bidirectional surges |
| Case (exposed cathode pad) | Thermal conduction path | Integral thermal pad transfers heat to PCB copper; requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal for rated PPPM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and floating power rails without polarity constraints |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and body electronics requiring zero field failure risk |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and supports lead-free reflow assembly with peak temperature up to 260 °C (MSL Level 1) |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during surge events - critical for safeguarding 36 V-rated microcontrollers and analog front-ends |
| Glass-passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh industrial or outdoor environments |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground to clamp spikes before reaching ASIC 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 analog input channels (4–20 mA, 0–10 V) against EFT bursts and lightning-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side signal conditioning circuitry, coordinated with series impedance and filtering. Use Value: Limits transient voltage to ≤58.1 V during 800 W surges, preventing damage to precision op-amps and ADCs without adding propagation delay. |
| Power Supply Rail Protection | Communication Bus Protection |
Use Scenario: Secondary surge protection on 24 V DC power distribution networks feeding industrial controllers and HMIs. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from inductive kickback and conducted transients upstream of DC/DC converters. Use Value: Handles 13.8 A peak pulse current with 58.1 V clamping, reducing stress on upstream fuses and downstream regulators during repetitive switching events. |
Use Scenario: Bidirectional protection of CAN FD physical layer traces in automotive domain controllers and battery management systems. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground clamp preserving signal integrity across 2 Mbps differential data transmission. Use Value: Symmetrical clamping ensures equal response to positive/negative transients without distorting common-mode rejection or timing margins. |
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_B/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial/industrial designs where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and automotive qualification remains mandatory |
| SMAJ36CA-E3/5B | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (90 °C/W) | Suitable for lower-energy surges or space-constrained layouts where SMB footprint is unavailable | Choose only if PCB layout cannot accommodate SMB dimensions or surge energy is confirmed ≤400 W |
Compared with SMB8J36CAHM3_B/I, the HE3 variant offers identical performance with non-halogen-free materials, while the SMAJ36CA trades 50% power rating and thermal performance for legacy package compatibility - neither is pin-compatible, but both serve overlapping protection roles in different mechanical or regulatory contexts.
Availability
SMB8J36CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and 24 V power rail surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J36CAHM3_B/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 optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-qualified transient suppression in automotive and industrial environments where compact size and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMB8J36CAHM3_B/I at its rated peak pulse current?
The SMB8J36CAHM3_B/I has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated peak pulse current (IPPM) of 13.8 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 36 V-rated components. The SMB8J36CAHM3_B/I maintains this clamping performance across its qualified temperature range of -55 °C to +150 °C.
Is SMB8J36CAHM3_B/I suitable for automotive applications?
Yes, SMB8J36CAHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive applications including engine control units, ADAS sensors, and body electronics. Its glass-passivated junction and MSL Level 1 rating support reflow assembly in automotive production lines. The SMB8J36CAHM3_B/I meets all stress tests required for under-hood deployment per AEC-Q101 Rev D.
What is the difference between SMB8J36CAHM3_B/I and SMB8J36CAHE3_B/I?
The SMB8J36CAHM3_B/I is halogen-free and RoHS-compliant, whereas the SMB8J36CAHE3_B/I is RoHS-compliant but contains halogens. Both share identical electrical specifications, AEC-Q101 qualification, SMB package, and thermal characteristics. The HM3 version is selected when halogen-free compliance is mandated by OEM or regional environmental regulations, while the HE3 version may be chosen for cost-sensitive industrial applications where halogen content is unrestricted.
Does SMB8J36CAHM3_B/I have polarity markings on the package?
No, SMB8J36CAHM3_B/I does not have polarity markings because it is a bidirectional TVS diode. Its symmetrical construction means both terminals perform identically - no cathode band or other marking is present. This eliminates orientation errors during automated placement and simplifies layout for AC-coupled or differential signal lines. The SMB8J36CAHM3_B/I functions correctly regardless of installation direction across the protected nodes.
What PCB pad layout is required to achieve the full 800 W rating of SMB8J36CAHM3_B/I?
To achieve the full 800 W peak pulse power rating, SMB8J36CAHM3_B/I must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay Document 88422. This layout ensures adequate thermal dissipation and current spreading during surge events. Deviating from this pad size reduces IPPM and VC performance - the SMB8J36CAHM3_B/I datasheet provides derating curves for elevated ambient temperatures and smaller copper areas.
SMB8J36CAHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 36V
- 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_B/I FAQ
1.How can I place an order for SMB8J36CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHM3_B/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_B/I reliable?
The price and inventory of SMB8J36CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHM3_B/I?
SMB8J36CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHM3_B/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_B/I?
For technical support, including SMB8J36CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHM3_B/I requirements.
6.How does Aetrix verify that SMB8J36CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHM3_B/I?
All SMB8J36CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMB8J36CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHM3_B/I Tags
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