My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J8.0CAHE3_A/H
- Part No.:
- SMB8J8.0CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHE3_A/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,131
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J8.0CAHE3_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 8.0 V stand-off voltage (VWM), 13.6 V clamping voltage (VC) at 100 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 port protection.
For engineers reviewing the SMB8J8.0CAHE3_A/H datasheet, SMB8J8.0CAHE3_A/H pinout, SMB8J8.0CAHE3_A/H application, or SMB8J8.0CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM = 1.7), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to shunt surge energy away from downstream circuitry. Its bidirectional structure enables symmetric protection of AC-coupled or floating lines without polarity sensitivity.
Designed per ANSI/IEEE C62.35 standards, it delivers sub-nanosecond response time and maintains stable clamping performance across -55 °C to +150 °C junction temperature range. The glass-passivated junction ensures robust reliability under repetitive surge stress and meets MSL Level 1 reflow requirements (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line. |
| VBR min/max | 8.89 V / 9.83 V at 1.0 mA IT - verified breakdown threshold ensures predictable turn-on within 10.5% tolerance band. |
| VC @ IPPM | 13.6 V at 100 A - clamping voltage limits downstream voltage stress to safe levels during 800 W transient events. |
| PPPM | 800 W (10/1000 μs) - peak surge handling capacity compatible with ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3. |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - extended thermal rating supports under-hood automotive deployment and high-power industrial environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per JESD47. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals enable orientation-agnostic placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; surge current flows bidirectionally through the same junction - eliminates layout polarity constraints. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional construction; no cathode/anode distinction required during PCB routing or assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, ADAS sensors, and body control modules. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; compatible with high-volume SMT lines using JEDEC J-STD-020 profile. |
| Glass-passivated junction | Improves long-term stability against humidity-induced degradation and repeated surge cycling in harsh environments. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound for stringent environmental programs. |
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 inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity under ISO 7637-2 Pulse 5a (75 V/300 ms) while surviving >1000 surges due to robust junction construction. |
Use Scenario: Safeguarding PLC digital input modules from field-wiring induced surges caused by relay coil de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with upstream PTC and downstream optocoupler isolation. Use Value: Limits transient voltage to ≤13.6 V during 100 A events, preventing latch-up or gate oxide damage in microcontroller GPIOs. |
| Consumer USB Port ESD Protection | Telecom Line Interface |
|
Use Scenario: Secondary-level surge suppression on USB 2.0 data lines (D+/D−) in set-top boxes and smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Coordinated clamping device working with low-capacitance polymer ESD suppressors to handle both fast ESD (IEC 61000-4-2) and slower surges (IEC 61000-4-5). Use Value: Delivers <1 ns response with 13.6 V clamping - preserves signal edge integrity while meeting ±15 kV contact ESD immunity. |
Use Scenario: Protecting Ethernet PHY front-end and telephone line interface ICs from lightning-induced longitudinal surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: High-power bidirectional clamp on differential pair, mounted adjacent to RJ45 jack with controlled impedance trace routing. Use Value: Handles 800 W surges per line pair without degradation - extends system uptime in outdoor telecom cabinets subjected to frequent atmospheric discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CAHE3_A/H | Same VWM (8.0 V) and VC (13.6 V), but rated for 1000 W PPPM (unidirectional only); bidirectional version SMBJ8.0CA has 600 W rating. | Lower peak power handling (800 W vs. 1000 W) makes SMB8J8.0CAHE3_A/H less suitable for single-polarity high-energy surges like automotive load dump. | Select SMB8J8.0CAHE3_A/H when bidirectional symmetry and AEC-Q101 compliance are mandatory; choose SMBJ8.0CAHE3_A/H only if unidirectional operation suffices and higher PPPM is needed. |
| SMCJ8.0CAHE3_A/H | Same electrical specs but in larger SMC (DO-214AB) package - 1.5× higher thermal mass and RθJA = 35 °C/W vs. 72 °C/W. | Better sustained surge capability and lower junction temperature rise during repetitive events; requires larger PCB footprint (7.11 mm × 6.22 mm vs. 4.57 mm × 3.94 mm). | Choose SMB8J8.0CAHE3_A/H for space-constrained automotive modules; select SMCJ8.0CAHE3_A/H for industrial applications requiring >1000 surge cycles or elevated ambient temperatures. |
Compared with SMBJ8.0CAHE3_A/H and SMCJ8.0CAHE3_A/H, SMB8J8.0CAHE3_A/H uniquely balances AEC-Q101 qualification, SMB footprint, and 800 W bidirectional surge capacity - making it optimal for compact, automotive-grade differential line protection where polarity independence is essential.
Availability
SMB8J8.0CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, consumer USB port hardening, and telecom line interface applications requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J8.0CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial systems.
FAQ
What is the clamping voltage of SMB8J8.0CAHE3_A/H at its rated peak pulse current?
The SMB8J8.0CAHE3_A/H exhibits a maximum clamping voltage (VC) of 13.6 V when subjected to its rated 100 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream 5 V or 3.3 V ICs. The SMB8J8.0CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMB8J8.0CAHE3_A/H suitable for automotive applications?
Yes, SMB8J8.0CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant, AEC-Q101-qualified construction. It meets requirements for under-hood and cabin modules, including resistance to thermal cycling, humidity, and mechanical shock. The SMB8J8.0CAHE3_A/H is referenced in Vishay's automotive ordering guidance and used in production ECU designs for sensor and bus line protection.
How does the bidirectional configuration of SMB8J8.0CAHE3_A/H affect PCB layout?
The SMB8J8.0CAHE3_A/H has no polarity marking and identical electrical behavior in both directions, allowing unrestricted orientation during automated placement. This eliminates the need for silkscreen polarity indicators or orientation-specific footprints - reducing design rule complexity and enabling simplified routing of differential or AC-coupled signals. The SMB8J8.0CAHE3_A/H's symmetrical terminals simplify layout in applications such as RS-485 or CAN bus protection where line reversal must be tolerated.
What is the thermal resistance of SMB8J8.0CAHE3_A/H, and how does it impact derating?
The SMB8J8.0CAHE3_A/H 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 governs power derating above 25 °C ambient: for example, at 85 °C ambient, its peak pulse power must be reduced to ~560 W to maintain TJ ≤ 150 °C. Derating curves are provided in Figure 2 of Vishay Document 88422, and the SMB8J8.0CAHE3_A/H's RθJA directly informs heatsinking and pad design decisions.
Does SMB8J8.0CAHE3_A/H require special handling during reflow soldering?
No - SMB8J8.0CAHE3_A/H is rated MSL Level 1 per J-STD-020 and supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C. It does not require pre-baking or dry pack handling, simplifying integration into high-volume SMT lines. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102, and the SMB8J8.0CAHE3_A/H's glass passivation ensures robustness against solder thermal stress without parametric shift.
SMB8J8.0CAHE3_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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 58.8A
- 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)
SMB8J8.0CAHE3_A/H FAQ
1.How can I place an order for SMB8J8.0CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/H reliable?
The price and inventory of SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHE3_A/H?
SMB8J8.0CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/H?
For technical support, including SMB8J8.0CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J8.0CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHE3_A/H?
All SMB8J8.0CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHE3_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 SMB8J8.0CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHE3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
