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Vishay General Semiconductor - Diodes Division SMB8J15CAHE3/52
- Part No.:
- SMB8J15CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHE3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,637
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Product details
Overview
SMB8J15CAHE3/52 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 clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J15CAHE3/52 datasheet, SMB8J15CAHE3/52 pinout, SMB8J15CAHE3/52 application, or SMB8J15CAHE3/52 equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.63), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with bidirectional symmetry enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is rated for 8.3 ms half-sine surge current up to 100 A (IFSM) in unidirectional variants - though SMB8J15CAHE3/52 is bidirectional and thus excludes IFSM rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line |
| VBR min/max | 16.7 V / 18.5 V at IT = 1.0 mA - guaranteed breakdown onset window; ensures consistent triggering across production lots |
| VC @ IPPM | 24.4 V at IPPM = 32.8 A - clamping voltage under full 800 W surge; limits downstream IC stress during lightning or ESD events |
| PPPM | 800 W (10/1000 μs) - peak transient energy handling capacity; supports IEC 61000-4-5 Level 3/4 surge immunity |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage at stand-off; preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals accept either orientation in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied |
| Case (cathode band absent) | Non-functional mechanical reference | No electrical connection; case serves only as thermal and mechanical anchor; no grounding requirement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Glass-passivated junction | Enhanced long-term stability and reduced parameter drift over temperature and lifetime vs. epoxy-passivated alternatives |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices |
| Matte tin-plated leads | Ensures reliable solderability per J-STD-002 and JESD 22-B102; passes JESD 201 Class 2 whisker test |
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. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity during 800 W transients while meeting AEC-Q101 requirements for 15-year vehicle service life. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping element on 24 V DC input lines to prevent false triggering and latch-up in microcontroller GPIOs. Use Value: Limits clamped voltage to 24.4 V, well below 30 V absolute maximum ratings of common industrial logic ICs. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge arrestor on differential pair, coordinated with secondary GDT or polymer PTC for multi-stage protection. Use Value: Withstands repeated 800 W surges without degradation, supporting telecom equipment MTBF > 100,000 hours. |
Use Scenario: Adding robust ESD and surge immunity to USB 2.0 data lines in smart home hubs and portable audio devices. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) bidirectional clamp placed adjacent to USB connector to suppress ±15 kV contact discharge per IEC 61000-4-2. Use Value: Clamps transients within 1 ns while adding <0.5 pF parasitic capacitance - preserving signal integrity at 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | Same VWM (15 V) and VC (24.4 V), but lower PPPM (600 W); unqualified for AEC-Q101 | Restricted to commercial-grade industrial or consumer systems without automotive qualification requirements | Select when cost sensitivity outweighs automotive reliability needs and surge threat level is ≤600 W |
| 1.5KE15CA | Higher VWM (12.8 V), same VC (24.4 V), larger DO-201 package (5.3 mm × 5.3 mm), 1500 W PPPM | Requires larger PCB footprint and manual or wave-solder assembly; suited for high-power AC mains or power supply inputs | Choose for legacy through-hole designs or where higher surge margin justifies larger size and non-SMT process |
Compared with SMB8J15CAHE3/52, SMBJ15CA-E3/52 offers identical clamping performance but lacks automotive qualification and handles less surge energy, while 1.5KE15CA delivers higher power rating in a non-SMT package - making SMB8J15CAHE3/52 optimal for space-constrained, AEC-Q101–compliant SMT designs requiring precise 15 V stand-off.
Availability
SMB8J15CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB port protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J15CAHE3/52 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 and application-specific optimization.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-density, high-reliability transient suppression in automotive and industrial environments where AEC-Q101 validation and tight parametric control are mandatory.
FAQ
What is the clamping voltage of SMB8J15CAHE3/52 and how is it measured?
The SMB8J15CAHE3/52 has a maximum clamping voltage (VC) of 24.4 V, measured at a peak pulse current (IPPM) of 32.8 A using the standardized 10/1000 μs double-exponential surge waveform. This value reflects the actual voltage seen by downstream circuitry during worst-case transient events and is guaranteed across temperature and production lot variations per Vishay Document 88422.
Is SMB8J15CAHE3/52 suitable for automotive applications?
Yes - SMB8J15CAHE3/52 is explicitly AEC-Q101 qualified, with test evidence covering temperature cycling, high-temperature reverse bias, and ESD robustness. Its HE3 suffix denotes RoHS-compliant and AEC-Q101–qualified construction, making it approved for use in engine control, ADAS, and body electronics per automotive OEM requirements.
What does the "CA" suffix mean in SMB8J15CAHE3/52?
The "CA" suffix in SMB8J15CAHE3/52 indicates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This eliminates polarity concerns during board layout and enables single-device protection of AC-coupled or differential signal lines.
How does SMB8J15CAHE3/52 differ from unidirectional variants like SMB8J15AHE3/52?
SMB8J15CAHE3/52 is bidirectional with no cathode marking and symmetric VBR/VWM characteristics, whereas SMB8J15AHE3/52 is unidirectional with a cathode band and specified forward voltage drop (VF = 3.5 V at 50 A). The bidirectional version supports AC signal paths and dual-polarity surge events; the unidirectional version allows DC blocking and higher IFSM capability.
What PCB pad layout is recommended for SMB8J15CAHE3/52?
Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal and surge performance. The SMB (DO-214AA) outline drawing in Document 88422 defines minimum pad dimensions of 0.086" (2.18 mm) length and 0.060" (1.52 mm) width, with 0.085" (2.159 mm) maximum width to ensure proper solder fillet formation and thermal dissipation.
SMB8J15CAHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J15CAHE3/52 FAQ
1.How can I place an order for SMB8J15CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHE3/52 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 SMB8J15CAHE3/52 reliable?
The price and inventory of SMB8J15CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHE3/52?
SMB8J15CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHE3/52 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 SMB8J15CAHE3/52?
For technical support, including SMB8J15CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J15CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHE3/52 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 SMB8J15CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHE3/52?
All SMB8J15CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHE3/52, 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 SMB8J15CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J15CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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