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Vishay General Semiconductor - Diodes Division SMB8J5.0CAHE3/52
- Part No.:
- SMB8J5.0CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J5.0CAHE3/52.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
SMB8J5.0CAHE3/52 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 5.0 V stand-off voltage (VWM), 6.4–7.25 V breakdown voltage (VBR) at 10 mA, 87.0 V clamping voltage (VC) at 2000 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 SMB8J5.0CAHE3/52 datasheet, SMB8J5.0CAHE3/52 pinout, SMB8J5.0CAHE3/52 application, or SMB8J5.0CAHE3/52 equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low clamping ratio (VC/VWM ≈ 17.4), MSL Level 1 reflow compatibility, and thermal resistance (RθJA = 72 °C/W) for surface-mount reliability in space-constrained designs.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA leakage at 5.0 V, then rapidly avalanches when transients exceed VBR to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance across temperature.
The device complies with ANSI/IEEE C62.35 for transient suppression and is rated for -55 °C to +150 °C junction operation. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity concerns, while the SMB package supports automated placement and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin for 5 V logic/sensor rails. |
| VBR (min/max) | 6.40 V / 7.25 V at 10 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 87.0 V at 2000 A - clamping voltage during 10/1000 µs surge; limits stress on protected circuitry to safe levels. |
| PPPM | 800 W - peak pulse power handling per 10/1000 µs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤2000 µA - reverse leakage at stand-off voltage; low enough to avoid loading 5 V microcontroller I/O or analog sensor outputs. |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive use and high-ambient industrial environments. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking - symmetrical terminals; cathode band absent per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for bidirectional clamping; no DC polarity dependency - suitable for AC, differential, or floating lines. |
| Case (cathode band omitted) | Thermal and mechanical interface | Exposed copper pad area (0.2" × 0.2") required for thermal dissipation; RθJA = 72 °C/W assumes specified mounting layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control modules, ADAS sensors, and body ECUs requiring long-term field reliability. |
| Bidirectional clamping | Protects both positive and negative transients on same device - eliminates need for dual unidirectional devices or external polarity management. |
| Low clamping ratio (VC/VWM) | 17.4 - tight voltage limiting relative to stand-off level; preserves margin for 5 V rail integrity during 1 kV/0.5 kA surges. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without pre-baking; reduces manufacturing complexity and cost. |
| Glass-passivated junction | Ensures stable VBR over time and temperature; prevents parameter drift in harsh environments like industrial motor drives. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp fast-rising spikes before reaching PHY or MCU pins. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while drawing <2 µA at 5 V - avoids false triggering or power loss in always-on modules. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive kickback from solenoid/relay switching. IC Role / Device Role / Timing Role: Primary front-end surge limiter on field-side terminals, coordinated with upstream fuses and downstream filtering. Use Value: Absorbs 800 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| USB/Serial Interface Protection | DC Power Rail Clamping |
Use Scenario: Guarding RS-485 transceivers and USB-C CC/DFP lines against ESD and cable discharge events in factory automation equipment. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp placed adjacent to connector to minimize stub length and preserve signal rise time. Use Value: Limits ESD-induced overshoot to ≤87 V within <1 ns response, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Secondary overvoltage clamp on regulated 5 V supply rails feeding microcontrollers and memory in embedded gateways. IC Role / Device Role / Timing Role: Backup protection layer after primary DC-DC converter OVP, activated only during catastrophic failure or lightning-induced coupling. Use Value: Withstands 2000 A transient current without fuse activation, providing fail-safe shutdown margin beyond primary protection schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CA-E3/52 | Unqualified for AEC-Q101; same VWM/VBR/VC but lower PPPM (600 W vs. 800 W) and IPPM (100 A vs. 2000 A). | Restricted to commercial-grade consumer or office equipment; not approved for automotive or safety-critical industrial use. | Select only if AEC-Q101 is unnecessary and surge threat level is below IEC 61000-4-5 Level 3. |
| SMCJ5.0CAHE3/52 | Same AEC-Q101 qualification and bidirectional function, but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and VC = 9.2 V. | Better suited for higher-energy threats (e.g., 48 V telecom power rails); requires larger PCB footprint and higher thermal mass. | Choose when system-level surge testing exceeds 800 W or when board layout allows SMC's 7.11 mm × 6.22 mm footprint. |
Compared with SMBJ5.0CA-E3/52, SMB8J5.0CAHE3/52 delivers automotive-grade reliability and 20× higher surge current capacity; versus SMCJ5.0CAHE3/52, it trades 40% lower power rating for 35% smaller PCB area and identical AEC-Q101 compliance - optimizing space-constrained automotive modules.
Availability
SMB8J5.0CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB/serial port protection, and 5 V DC power rail clamping requiring stable component supply across multi-year production cycles.
Supply support for SMB8J5.0CAHE3/52 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, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where compact size and surge resilience are critical.
FAQ
What is the clamping voltage of SMB8J5.0CAHE3/52 at its rated peak pulse current?
The SMB8J5.0CAHE3/52 has a maximum clamping voltage (VC) of 87.0 V at 2000 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMB8J5.0CAHE3/52 achieves this while maintaining a low VWM of 5.0 V.
Is SMB8J5.0CAHE3/52 suitable for automotive applications?
Yes, SMB8J5.0CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3", indicating RoHS-compliant and automotive-grade reliability. It undergoes stress testing including high-temperature operating life, temperature cycling, and unbiased HAST to ensure performance in under-hood and chassis-mounted modules. The SMB8J5.0CAHE3/52 is commonly used in ADAS camera modules, body control units, and battery management interfaces.
How does SMB8J5.0CAHE3/52 differ from unidirectional SMBJ5.0A variants?
The SMB8J5.0CAHE3/52 is bidirectional with symmetrical clamping for both polarities, whereas SMBJ5.0A is unidirectional and requires correct cathode orientation. SMB8J5.0CAHE3/52 offers higher peak pulse power (800 W vs. 600 W) and surge current (2000 A vs. 100 A), plus AEC-Q101 qualification - making it appropriate for harsher environments. The SMB8J5.0CAHE3/52 also features tighter VBR tolerance (6.40–7.25 V) versus SMBJ5.0A (6.40–7.07 V).
What is the thermal resistance of SMB8J5.0CAHE3/52, and how does it affect layout?
The SMB8J5.0CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's outline drawing; reducing pad area increases RθJA and risks thermal runaway during repeated surges. Layout must maintain full copper exposure under both terminals and avoid solder mask over thermal pads to ensure SMB8J5.0CAHE3/52 remains within its 150 °C TJ limit.
Does SMB8J5.0CAHE3/52 have polarity markings, and how is it installed?
No, SMB8J5.0CAHE3/52 has no polarity marking - as a bidirectional TVS, it functions identically regardless of orientation. The SMB (DO-214AA) package lacks a cathode band, unlike unidirectional variants. During placement, either end may connect to line or return; this simplifies assembly and eliminates orientation errors. The SMB8J5.0CAHE3/52 is designed for automated pick-and-place with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
SMB8J5.0CAHE3/52 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 87A
- 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)
SMB8J5.0CAHE3/52 FAQ
1.How can I place an order for SMB8J5.0CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J5.0CAHE3/52 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 SMB8J5.0CAHE3/52 reliable?
The price and inventory of SMB8J5.0CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J5.0CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J5.0CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J5.0CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J5.0CAHE3/52?
SMB8J5.0CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J5.0CAHE3/52 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 SMB8J5.0CAHE3/52?
For technical support, including SMB8J5.0CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J5.0CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J5.0CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J5.0CAHE3/52 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 SMB8J5.0CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J5.0CAHE3/52?
All SMB8J5.0CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J5.0CAHE3/52, 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 SMB8J5.0CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J5.0CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J5.0CAHE3/52 Tags
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