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Vishay General Semiconductor - Diodes Division SMB8J15CAHM3/H
- Part No.:
- SMB8J15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,681
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Product details
Overview
SMB8J15CAHM3/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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 32.8 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 SMB8J15CAHM3/H datasheet, SMB8J15CAHM3/H pinout, SMB8J15CAHM3/H application, or SMB8J15CAHM3/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), and halogen-free RoHS compliance per HM3 suffix - critical for automotive-grade ESD/surge resilience in harsh environments.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture enables symmetric clamping above ±16.7 V breakdown (VBR min/max), with guaranteed clamping performance up to 24.4 V at 32.8 A IPPM under standardized 10/1000 µs surge conditions.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, supported by RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable mounting on 5.0 mm × 5.0 mm copper pads. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - required for automotive powertrain and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates; defines safe signal line bias margin. |
| VBR (min/max) | 16.7 V / 18.5 V - breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 24.4 V at 32.8 A - clamping voltage under full 10/1000 µs surge; limits protected IC voltage stress during worst-case transients. |
| PPPM | 800 W - peak pulse power handling capability; determines survivability against ISO 7637-2 Pulse 1/2/5a surges. |
| ID @ VWM | 1.0 µA - reverse leakage at 15 V; negligible loading on low-power sensor or communication lines. |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive placement without derating. |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with automated SMT assembly. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity unmarked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | No polarity marking; terminals interchangeable - enables single-component protection of AC-coupled or differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic encapsulation with defined thermal resistance (RθJL = 20 °C/W); requires 5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment - meets stress testing for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS-compliant (HM3) | Meets JEDEC J-STD-201 Class 2 whisker resistance and global environmental regulations - suitable for export-controlled automotive supply chains. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure during surge events - critical for protecting 16 V-rated CAN transceivers or 3.3 V/5 V microcontroller I/O pins. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns - eliminates bake requirements pre-assembly. |
| 800 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 5a (50 V, 100 ms) when combined with series impedance - enables robust front-end protection without external current limiting. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground - responds within <1 ns to limit transient overshoot to ≤24.4 V. Use Value: Prevents latch-up or gate oxide damage in downstream ASICs while maintaining signal integrity below 15 V DC operating range. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V industrial field wiring subject to relay contact bounce and motor drive coupling. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted directly at connector entry point - absorbs repetitive 400 V/1 A surges per IEC 61000-4-5. Use Value: Eliminates need for discrete RC snubbers or varistors; reduces BOM count and PCB area while meeting EN 61000-6-2 immunity requirements. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Shielding door module microcontrollers from battery reverse connection and jump-start induced transients in 12 V systems. IC Role / Device Role / Timing Role: Bidirectional clamping element across VCC-to-ground rail - activates symmetrically during positive/negative voltage excursions beyond ±16.7 V. Use Value: Enables single-device protection of both supply rails and signal lines - simplifies layout and improves failure mode coverage vs. unidirectional alternatives. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Fast-response TVS placed between motor driver output and MCU input - clamps flyback energy before reaching logic-level thresholds. Use Value: Extends MCU lifetime by limiting transient-induced bit flips or reset events; validated for >100,000 surge cycles at 80% PPPM rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J15CAHE3/H | Same electrical specs and SMB package, but uses standard RoHS-compliant (non-halogen-free) molding compound. | Lacks halogen-free certification; acceptable for non-automotive commercial designs where JEDEC J-STD-201 Class 2 whisker resistance is not mandated. | Select SMB8J15CAHE3/H only if halogen-free requirement is waived and cost optimization is prioritized. |
| SMAJ15CAHM3 | Lower PPPM (400 W vs. 800 W), same VWM/VC, but in smaller SMA (DO-214AC) package with higher RθJA (110 °C/W). | Insufficient for ISO 7637-2 Pulse 5a; limited to lower-energy IEC 61000-4-2/4-4 events; unsuitable for under-hood automotive use due to thermal constraints. | Choose SMAJ15CAHM3 only for space-constrained consumer applications with ≤400 W surge exposure and ambient <85 °C. |
Compared with SMB8J15CAHE3/H, the SMB8J15CAHM3/H adds halogen-free compliance and whisker resistance without sacrificing clamping performance; versus SMAJ15CAHM3, it delivers double the surge power handling and superior thermal management - making it the sole choice for AEC-Q101-compliant 12 V automotive systems requiring 800 W resilience.
Availability
SMB8J15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and body control module design requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J15CAHM3/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 targets automotive-grade transient suppression, engineered to meet AEC-Q101 and ISO 7637-2 requirements while delivering high power density in compact SMB packages.
FAQ
What is the clamping voltage of SMB8J15CAHM3/H at its rated peak pulse current?
The SMB8J15CAHM3/H exhibits a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry remains below this voltage threshold during surge events - essential for safeguarding 24 V-tolerant interfaces and 3.3 V/5 V logic inputs. The SMB8J15CAHM3/H maintains this clamping performance across its full operating temperature range.
Is SMB8J15CAHM3/H suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB8J15CAHM3/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation and the HM3 suffix designation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The SMB8J15CAHM3/H is approved for use in engine control units, ADAS camera modules, and body electronics where reliability under thermal and electrical stress is mandatory - fulfilling OEM requirements for automotive-grade TVS diodes.
How does the HM3 suffix differentiate SMB8J15CAHM3/H from other variants like HE3?
The HM3 suffix on SMB8J15CAHM3/H indicates halogen-free, RoHS-compliant construction with JEDEC J-STD-201 Class 2 whisker resistance - a stricter material specification than the HE3 suffix, which denotes RoHS compliance without halogen-free assurance. Both share identical electrical characteristics and AEC-Q101 qualification, but HM3 is required for automotive supply chains mandating halogen-free materials (e.g., VW 80000, GMW3172). The SMB8J15CAHM3/H thus meets Tier 1 supplier sustainability and reliability mandates where HE3 does not.
What is the thermal resistance profile of SMB8J15CAHM3/H, and how does it impact PCB layout?
SMB8J15CAHM3/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This means effective heat dissipation requires adherence to Vishay's recommended pad layout - undersized pads increase thermal impedance, causing premature thermal shutdown or reduced surge endurance. For sustained operation near TJ max (150 °C), the SMB8J15CAHM3/H must be placed on thermally robust land patterns, especially in under-hood automotive environments.
Can SMB8J15CAHM3/H replace unidirectional TVS diodes in existing designs?
SMB8J15CAHM3/H is bidirectional and cannot directly replace unidirectional TVS diodes (e.g., SMB10J15A) in DC-biased circuits without verifying polarity compatibility. While it provides symmetric clamping for AC or differential signals, using it on a unidirectionally biased rail may allow forward conduction during normal operation. Designers must confirm signal topology - SMB8J15CAHM3/H is optimal for LIN, CAN, RS-485, or sensor bridges; unidirectional variants remain preferred for VCC-to-ground or single-ended digital I/O. Always validate with actual surge testing.
SMB8J15CAHM3/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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)
SMB8J15CAHM3/H FAQ
1.How can I place an order for SMB8J15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3/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 SMB8J15CAHM3/H reliable?
The price and inventory of SMB8J15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3/H?
SMB8J15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3/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 SMB8J15CAHM3/H?
For technical support, including SMB8J15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3/H requirements.
6.How does Aetrix verify that SMB8J15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3/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 SMB8J15CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3/H?
All SMB8J15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3/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 SMB8J15CAHM3/H part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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