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Vishay General Semiconductor - Diodes Division SMB8J36CAHM3_A/H
- Part No.:
- SMB8J36CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHM3_A/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,174
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Product details
Overview
SMB8J36CAHM3_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 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_A/H datasheet, SMB8J36CAHM3_A/H pinout, SMB8J36CAHM3_A/H application, or SMB8J36CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), 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 breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetric clamping across both polarities without external polarity management.
Rated for -55 °C to +150 °C junction temperature, it meets MSL Level 1 per J-STD-020 (260 °C reflow peak), supports automated SMT placement, and delivers repeatable clamping performance under repetitive surge stress when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 40.0 V / 44.2 V at 1.0 mA - defines guaranteed breakdown threshold window for design margining |
| VC @ IPPM | 58.1 V at 13.8 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 800 W - peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage ensuring minimal standby power impact on sensitive circuits |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity: bidirectional - no cathode marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction allows single-device protection of AC or floating lines |
| Case (body) | Thermal and mechanical interface | Non-electrical; thermally coupled to PCB copper pads for junction-to-ambient heat dissipation (RθJA = 72 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential, AC-coupled, or floating signal paths without polarity constraints |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and supports lead-free reflow assembly with 260 °C peak profile |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT handling without dry-pack or baking requirements |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp surges before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 12 V/24 V system transients while meeting AEC-Q101 lifetime reliability requirements. | Use Scenario: Safeguarding PLC digital input modules against field-wiring-induced surges from relay coils, solenoids, or motor drives. IC Role / Device Role / Timing Role: Primary front-end protection element on 24 V DC input channels, absorbing up to 800 W of transient energy. Use Value: Eliminates need for secondary protection stages, reducing BOM count and board space in DIN-rail mounted controllers. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers in networked building automation gateways from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between connector and transceiver, referenced to local ground plane. Use Value: Provides symmetrical ±58.1 V clamping independent of signal polarity, compatible with full-duplex communication lines. | Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine/microwave inverters from back-EMF spikes generated by universal motors. IC Role / Device Role / Timing Role: Localized TVS adjacent to motor driver ICs, suppressing fast-rising inductive kickback before it propagates into logic circuitry. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V logic despite repeated 13.8 A surge events at 10/1000 µs shape. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J36CAHE3_A/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial/industrial use where halogen-free requirement is not mandated | Select HE3 if halogen content is unrestricted and cost optimization is prioritized |
| SMAJ36CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (100 °C/W) | Suitable for lower-energy transients or space-constrained layouts where thermal derating is acceptable | Choose SMAJ36CA only when surge threat level is ≤400 W and PCB area is critical |
Compared with SMB8J36CAHM3_A/H, the HE3 variant offers identical protection performance without halogen-free assurance, while SMAJ36CA trades power handling and thermal robustness for footprint reduction - making SMB8J36CAHM3_A/H optimal for high-reliability automotive and industrial deployments demanding 800 W surge immunity and AEC-Q101 validation.
Availability
SMB8J36CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J36CAHM3_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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-qualified transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J36CAHM3_A/H under a 10/1000 µs surge?
The SMB8J36CAHM3_A/H clamps to a maximum of 58.1 V when subjected to its rated peak pulse current of 13.8 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMB8J36CAHM3_A/H achieves this with a low clamping ratio of approximately 1.39 relative to its VBR midpoint.
Is SMB8J36CAHM3_A/H suitable for automotive applications?
Yes, SMB8J36CAHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, AEC-Q101). It has undergone stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC standards. The SMB8J36CAHM3_A/H is commonly deployed in engine control units, ADAS camera modules, and body control modules where protection against load dump and ISO 7637-2 pulses is required.
What does the "HM3" suffix indicate in SMB8J36CAHM3_A/H?
The "HM3" suffix in SMB8J36CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes the part from commercial-grade variants (E3/M3) and non-automotive qualified versions. HM3 ensures compliance with automotive material restrictions (e.g., IEC 61249-2-21), supports lead-free reflow at 260 °C, and confirms qualification for mission-critical vehicle subsystems - all verified per Vishay document 88422 revision 09-Jan-2024.
How does SMB8J36CAHM3_A/H differ from unidirectional TVS diodes like SMB10J36A?
SMB8J36CAHM3_A/H is bidirectional, providing symmetrical clamping for both positive and negative transients without polarity dependency, whereas SMB10J36A is unidirectional and requires correct cathode orientation. The SMB8J36CAHM3_A/H has lower peak pulse power (800 W vs. 1000 W) and higher clamping voltage (58.1 V vs. 53.3 V) than its unidirectional counterpart, reflecting trade-offs inherent in bidirectional architecture. Both share the same VWM (36 V) and package (SMB), but SMB8J36CAHM3_A/H is optimized for AC, differential, or floating-line protection.
What PCB layout guidance applies to SMB8J36CAHM3_A/H for optimal thermal performance?
For optimal thermal performance, SMB8J36CAHM3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay document 88422. This layout reduces thermal resistance (RθJA = 72 °C/W) and prevents junction overheating during repetitive surges. Avoid narrow traces or thermal reliefs on these pads; use solid copper pours connected to internal ground planes where possible. The SMB8J36CAHM3_A/H datasheet confirms that derating curves in Figure 2 are based on this pad geometry - deviating invalidates published power ratings.
SMB8J36CAHM3_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):
- 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_A/H FAQ
1.How can I place an order for SMB8J36CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHM3_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 SMB8J36CAHM3_A/H reliable?
The price and inventory of SMB8J36CAHM3_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 SMB8J36CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHM3_A/H?
SMB8J36CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHM3_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 SMB8J36CAHM3_A/H?
For technical support, including SMB8J36CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J36CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHM3_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 SMB8J36CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHM3_A/H?
All SMB8J36CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHM3_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 SMB8J36CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J36CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHM3_A/H Tags
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