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Vishay General Semiconductor - Diodes Division SMB8J36CAHM3/H
- Part No.:
- SMB8J36CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHM3/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,904
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Product details
Overview
SMB8J36CAHM3/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 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1.0 mA test current, 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/H datasheet, SMB8J36CAHM3/H pinout, SMB8J36CAHM3/H application, or SMB8J36CAHM3/H equivalent, this device serves as an AEC-Q101 qualified, halogen-free, RoHS-compliant TVS for robust ESD and lightning-induced transient suppression in space-constrained PCB layouts requiring MSL Level 1 reflow compatibility and ≤260 °C peak soldering temperature.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1 ns), while low incremental surge resistance supports effective energy diversion without thermal runaway under repetitive surges.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). Its SMB package enables automated placement and meets UL 94 V-0 flammability requirements, supporting high-density routing in automotive control units and industrial PLC modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 40.0 V / 44.2 V at 1.0 mA - guaranteed breakdown onset range; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 58.1 V at 13.8 A - clamped voltage seen by protected circuit during 10/1000 µs surge; determines downstream IC survivability |
| PPPM | 800 W - peak transient power dissipation capability; defines single-event surge handling capacity per JEDEC standard |
| 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 - maximum junction temperature rating; enables operation in under-hood automotive environments |
| MSL Level | Level 1 (per J-STD-020) - supports lead-free reflow up to 260 °C peak without moisture-induced damage |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts during either polarity surge above VBR - no cathode band or polarity indicator required |
| Case (body) | Thermal and mechanical interface | Plastic molded body provides electrical isolation and transfers heat to PCB copper pads; requires 0.2" × 0.2" (5.0 mm × 5.0 mm) minimum pad area per terminal per datasheet fig. 2 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance - supports green manufacturing and long-term supply chain compliance |
| Low-profile SMB package | Height ≤0.086" (2.20 mm); footprint 0.155" × 0.130" (3.94 mm × 3.30 mm) - enables compact layout in tight spaces like camera modules and motor drivers |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on with VC/VBR ≈ 1.45 - limits overvoltage exposure to sensitive analog front-ends and CAN transceivers |
| UL 94 V-0 molding compound | Self-extinguishing plastic housing - satisfies fire-safety requirements for industrial control panels and EV charging infrastructure |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input or LIN transceiver. Use Value: Limits transient voltage to ≤58.1 V during 10/1000 µs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V signal chains. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Primary surge shunt on field-side input traces, upstream of optocoupler or level-shifter isolation barrier. Use Value: Absorbs up to 800 W transient energy without degradation, maintaining >10⁶ surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding Ethernet PHY power pins and MDI-X data pairs against lightning-induced surges in PoE-powered switches. IC Role / Device Role / Timing Role: Secondary-level TVS on DC bias lines and common-mode choke outputs, coordinated with primary GDT or MOV stages. Use Value: Clamps common-mode transients to <60 V within nanoseconds, preserving PHY IC integrity while enabling compact 2-layer board design. |
Use Scenario: Suppressing switching noise and line surges on AC-DC adapter primary-side rectifier outputs feeding PWM controllers. IC Role / Device Role / Timing Role: Fast-reacting clamp across bulk capacitor terminals to limit voltage overshoot during MOSFET turn-off transitions. Use Value: Reduces peak voltage stress on electrolytic capacitors and controller ICs, extending lifetime in cost-sensitive consumer adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J36CAHE3/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-halogen-free, non-AEC-Q101) | Lacks automotive qualification and halogen-free certification; suitable for industrial/commercial designs without AEC or green material mandates | Select when AEC-Q101 and halogen-free requirements are not enforced, and cost optimization is prioritized. |
| SMAJ36CA | Lower PPPM (400 W), higher VC (68.7 V at 5.8 A), same VWM/VBR; SMA (DO-214AC) package with larger footprint and height | Reduced surge handling and less precise clamping; requires more PCB area and may not meet stringent automotive surge standards | Consider only for legacy designs where SMA footprint is fixed and 800 W rating is not required. |
Compared with SMB8J36CAHE3/H and SMAJ36CA, SMB8J36CAHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W bidirectional surge capability in the compact SMB footprint - making it the optimal choice for next-generation automotive and industrial edge devices demanding full compliance and miniaturization.
Availability
SMB8J36CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing aligned with IATF 16949 practices.
Supply support for SMB8J36CAHM3/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8JxxCA series targets high-reliability transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance and seamless integration into automotive ECUs, industrial automation systems, and infrastructure equipment.
FAQ
What is the clamping voltage of SMB8J36CAHM3/H at its rated peak pulse current?
The SMB8J36CAHM3/H has a maximum clamping voltage (VC) of 58.1 V at its specified peak pulse current (IPPM) of 13.8 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience voltages exceeding 58.1 V during standardized surge events - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the SMB8J36CAHM3/H.
Is SMB8J36CAHM3/H suitable for automotive applications?
Yes, SMB8J36CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting automotive reliability, environmental, and safety requirements. It is explicitly rated for operation from -55 °C to +150 °C junction temperature and validated for temperature cycling, highly accelerated life testing, and ESD immunity, making SMB8J36CAHM3/H appropriate for engine control, body electronics, and ADAS sensor protection.
How does the SMB8J36CAHM3/H differ from unidirectional variants like SMB10J36A?
SMB8J36CAHM3/H is bidirectional with symmetrical clamping in both polarities and a 36 V stand-off voltage (VWM), whereas SMB10J36A is unidirectional with cathode/anode polarity, 36 V VWM, and higher 1000 W peak pulse power. The "8" prefix indicates lower surge current rating (13.8 A vs. 17.2 A), and the "C" denotes bidirectionality. SMB8J36CAHM3/H is used where AC or differential signals require equal protection on both sides, unlike SMB10J36A which protects DC rails with forward conduction path.
What PCB layout guidance applies to SMB8J36CAHM3/H for optimal thermal performance?
Per Vishay datasheet Figure 2, SMB8J36CAHM3/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and maintain junction temperature within limits. Thermal vias under pads and internal ground/power planes improve heat dissipation. The SMB (DO-214AA) package's RθJA is 72 °C/W under these conditions - reducing to ~35 °C/W with two internal copper layers and 6 thermal vias per pad.
Does SMB8J36CAHM3/H have polarity markings on the package?
No, SMB8J36CAHM3/H has no polarity markings because it is a bidirectional TVS diode - both terminals are functionally identical and conduct during overvoltage events of either polarity. Unlike unidirectional types (e.g., SMB10J36A) that feature a cathode band, SMB8J36CAHM3/H relies on symmetrical construction and requires no orientation during placement, simplifying automated assembly and eliminating risk of reverse installation.
SMB8J36CAHM3/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):
- 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/H FAQ
1.How can I place an order for SMB8J36CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHM3/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 SMB8J36CAHM3/H reliable?
The price and inventory of SMB8J36CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J36CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHM3/H?
SMB8J36CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHM3/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 SMB8J36CAHM3/H?
For technical support, including SMB8J36CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHM3/H requirements.
6.How does Aetrix verify that SMB8J36CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHM3/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 SMB8J36CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHM3/H?
All SMB8J36CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHM3/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 SMB8J36CAHM3/H part is unused and in its original packaging.
Return procedure for SMB8J36CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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