My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J26CAHE3_B/H
- Part No.:
- SMB8J26CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHE3_B/H.pdf
- Description:
- 800W,26V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,470
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J26CAHE3_B/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 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage (VC) at 19.0 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 SMB8J26CAHE3_B/H datasheet, SMB8J26CAHE3_B/H pinout, SMB8J26CAHE3_B/H application, or SMB8J26CAHE3_B/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.62), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown junction. Its bidirectional architecture enables symmetric suppression of positive and negative transients without external polarity orientation, supporting robust ESD and lightning surge immunity per IEC 61000-4-2/4-5.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, with junction temperature rated from –55 °C to +150 °C. It meets MSL Level 1 (260 °C peak reflow) and passes JESD 201 Class 2 whisker testing on matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe interface voltage margin for 24 V automotive systems. |
| VBR min / max | 28.9 V / 31.9 V at 1.0 mA - Verified breakdown threshold ensures consistent turn-on across production lots and temperature range. |
| VC @ IPPM | 42.1 V at 19.0 A - Clamping voltage under full 10/1000 μs surge; limits downstream IC stress to < 43 V during 800 W transient events. |
| PPPM | 800 W - Peak pulse power handling capability with standard 10/1000 μs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance. |
| ID @ VWM | 1.0 μA - Ultra-low reverse leakage at stand-off voltage; prevents signal distortion and power loss in high-impedance sensor lines. |
| TJ max | +150 °C - Extended junction temperature rating enables use in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical dual-terminal construction with cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output; bidirectional clamping allows placement without orientation check during automated assembly. |
| Case (body) | Thermal and mechanical interface | Plastic molded body transfers heat to PCB copper pads; requires minimum 5.0 mm × 5.0 mm pad area per terminal for rated PPPM derating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, ADAS sensors, and body control modules. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 24 V supply domains. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift in harsh environments. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates tin whisker risk per JESD 201 Class 2. |
Applications
| Automotive CAN FD Transceivers | Industrial Analog Input Modules |
|---|---|
|
Use Scenario: Protection of CAN FD physical layer against load dump and inductive switching surges in vehicle networks. IC Role / Device Role: Bidirectional clamping element placed between CANH/CANL lines and ground. Use Value: Limits line voltage to ≤42.1 V during 800 W transients, preserving signal integrity and preventing transceiver latch-up. |
Use Scenario: Guarding 4–20 mA current loop inputs against field wiring surges in PLC analog I/O cards. IC Role / Device Role: Primary TVS on input terminals, upstream of precision op-amps and ADC front-ends. Use Value: Maintains <1.0 μA leakage at 26 V, avoiding offset errors in µA-level measurement circuits. |
| Automotive Camera Sensor Interfaces | Smart Building RS-485 Node Protection |
|
Use Scenario: Shielding MIPI CSI-2 or FPD-Link III data lines from ESD and cable discharge events in rear-view cameras. IC Role / Device Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed directly at connector entry point. Use Value: Clamps ±26 V transients without distorting high-speed video signals up to 3 Gbps. |
Use Scenario: Securing RS-485 transceivers in HVAC controllers exposed to long cable runs and lightning-induced surges. IC Role / Device Role: Line-to-line and line-to-ground protection on A/B differential pair and common-mode nodes. Use Value: Withstands repeated 800 W surges while maintaining <26 V working voltage margin above 24 V system rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade (non-AEC-Q101). | Lacks automotive qualification; unsuitable for under-hood or safety-critical ECUs. | Select when cost-sensitive industrial designs require identical clamping but not automotive reliability validation. |
| SMAJ26CAHE3_A/H | Same VWM/VC/IPPM ratings but in smaller SMA (DO-214AC) package; RθJA = 85 °C/W (vs. 72 °C/W). | Lower power derating above 25 °C; limited to ≤500 W sustained surge duty in compact layouts. | Choose only if board space is constrained and thermal margin allows reduced PPPM operation. |
Compared with SMB8J26CAHE3_B/H, the E3/52 variant omits AEC-Q101 validation and is restricted to commercial environments, while the SMAJ26CAHE3_A/H sacrifices thermal performance and surge headroom for footprint reduction - making SMB8J26CAHE3_B/H the optimal choice for thermally demanding, automotive-grade deployments.
Availability
SMB8J26CAHE3_B/H is available at Aetrix Electronics and suitable for automotive ADAS camera modules, industrial PLC analog I/O, and smart building RS-485 node protection requiring stable component supply with full AEC-Q101 traceability and extended temperature support.
Supply support for SMB8J26CAHE3_B/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 targets high-reliability transient suppression in automotive and industrial systems, engineered to meet stringent AEC-Q101 and IEC 61000-4-x standards with optimized clamping response and thermal robustness.
FAQ
What is the peak pulse power rating of SMB8J26CAHE3_B/H and under what test condition?
The SMB8J26CAHE3_B/H has a peak pulse power rating of 800 W, measured using the standardized 10/1000 μs double-exponential current waveform per ANSI/IEEE C62.35. This rating applies at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per terminal, and must be derated linearly above 25 °C per Figure 2 in the Vishay document 88422.
Is SMB8J26CAHE3_B/H unidirectional or bidirectional, and how does that affect circuit placement?
SMB8J26CAHE3_B/H is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity dependence. As a result, it has no cathode marking and can be placed in either orientation on PCBs - simplifying layout and eliminating orientation errors during automated assembly of automotive and industrial boards.
Does SMB8J26CAHE3_B/H meet automotive qualification standards?
Yes, SMB8J26CAHE3_B/H is AEC-Q101 qualified, verified per the full stress test suite including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock. The "HE3" suffix explicitly denotes AEC-Q101 qualification, distinguishing it from commercial-grade variants like SMB8J26CA-E3/52.
What is the maximum clamping voltage of SMB8J26CAHE3_B/H and at what current is it specified?
The maximum clamping voltage (VC) of SMB8J26CAHE3_B/H is 42.1 V, specified at the peak pulse current (IPPM) of 19.0 A under a 10/1000 μs waveform. This value represents the worst-case voltage seen by downstream circuitry during a full-rated surge event, enabling accurate overvoltage margin analysis for protected ICs such as CAN transceivers or ADC drivers.
How does the thermal resistance of SMB8J26CAHE3_B/H impact its surge handling in real-world PCB layouts?
SMB8J26CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads. Deviations from this pad layout - such as smaller pads or insufficient internal copper layers - increase RθJA, causing higher junction temperatures during repeated surges and requiring derating of PPPM per Figure 2 in the datasheet to avoid thermal runaway.
SMB8J26CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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)
SMB8J26CAHE3_B/H FAQ
1.How can I place an order for SMB8J26CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHE3_B/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 SMB8J26CAHE3_B/H reliable?
The price and inventory of SMB8J26CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHE3_B/H?
SMB8J26CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHE3_B/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 SMB8J26CAHE3_B/H?
For technical support, including SMB8J26CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J26CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHE3_B/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 SMB8J26CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHE3_B/H?
All SMB8J26CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHE3_B/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 SMB8J26CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J26CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHE3_B/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 …
