My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J26CAHM3/I
- Part No.:
- SMB8J26CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHM3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,822
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J26CAHM3/I 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 - optimized for automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J26CAHM3/I datasheet, SMB8J26CAHM3/I pinout, SMB8J26CAHM3/I application, or SMB8J26CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
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 symmetry enables protection of AC-coupled or differential lines without polarity concerns.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J26CAHM3/I supports automotive-grade reliability with MSL Level 1 moisture sensitivity and halogen-free, RoHS-compliant construction (HM3 suffix). The SMB package provides mechanical robustness while maintaining low profile for space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected circuitry |
| VBR (min/max) | 28.9 V / 31.9 V - breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold across production lot |
| VC @ IPPM | 42.1 V at 19.0 A - clamping voltage under 10/1000 µs surge; limits downstream voltage stress to ≤42.1 V during worst-case transient |
| PPPM | 800 W - peak pulse power handling per 10/1000 µs waveform; determines survivability against lightning-induced or inductive-switching surges |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance nodes |
| TJ max. | +150 °C - maximum junction temperature; enables deployment in under-hood automotive or industrial environments without derating |
| RθJL | 20 °C/W - junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper pads during repetitive surge events |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across device |
| Case (cathode band absent) | Mechanical reference / thermal path | No functional polarity marking; thermal energy dissipates through leads into PCB copper pads per JEDEC standard layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring zero-failure reliability |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance; suitable for lead-free reflow assembly |
| Low-profile SMB package | Height ≤ 2.20 mm enables use in ultra-thin modules and dense PCB layouts where Z-axis clearance is constrained |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; eliminates bake requirements prior to reflow soldering |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load-dump and jump-start transients in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching PHY IC. Use Value: Limits voltage excursion to ≤42.1 V during 800 W surge, preserving signal integrity and preventing latch-up in 3.3 V or 5 V transceivers. |
Use Scenario: Safeguarding 24 V PLC analog input channels against field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on front-end protection stage, coordinated with series impedance and filtering. Use Value: Withstands ≥19 A transient current while maintaining <1 µA leakage at 26 V, ensuring minimal impact on measurement accuracy. |
| Consumer USB-C Port | Telecom Line Card |
Use Scenario: Secondary-level surge suppression on USB-C CC and VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: Fast-response clamp complementing primary GDT or polymer PTC, activated within nanoseconds of overvoltage event. Use Value: Sub-ns response and 42.1 V clamping prevent damage to USB PD controllers rated for ≤28 V absolute maximum ratings. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI-X) from lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS placed adjacent to RJ45 magnetics to absorb common-mode transients before entering transformer. Use Value: 800 W PPPM rating meets ITU-T K.21 basic protection level for outdoor line cards without requiring additional stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CAHE3/I | Same electrical specs, but RoHS-compliant without halogen-free certification (E3 vs HM3) | Lacks JESD201 Class 2 whisker resistance; not recommended for high-reliability automotive deployments | Select SMB8J26CAHM3/I when halogen-free compliance and whisker resistance are required per OEM specifications |
| SMAJ26CA-M3/5B | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Insufficient for 800 W surge events; limited thermal margin in sustained transient environments | Choose SMB8J26CAHM3/I over SMAJ26CA-M3/5B when protecting against ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 3 surges |
Compared with SMB8J26CAHE3/I and SMAJ26CA-M3/5B, SMB8J26CAHM3/I delivers superior surge robustness (800 W), lower thermal resistance (20 °C/W), and full AEC-Q101/halogen-free compliance - making it the only option qualified for under-hood automotive and high-reliability industrial designs.
Availability
SMB8J26CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB-C docking stations, and telecom line card protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J26CAHM3/I 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.
SMB8J26CAHM3/I belongs to Vishay's TRANSZORB® TVS family - engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications infrastructure where AEC-Q101 qualification and repeatable clamping behavior are mandatory.
FAQ
What is the clamping voltage of SMB8J26CAHM3/I under a standard 10/1000 µs surge?
The SMB8J26CAHM3/I exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 19.0 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 42.1 V during such transient events, protecting 3.3 V or 5 V logic interfaces effectively.
Is SMB8J26CAHM3/I suitable for automotive applications?
Yes, SMB8J26CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It is explicitly intended for automotive use cases including sensor protection, infotainment interfaces, and body control modules where reliability under thermal cycling and vibration is critical.
How does the SMB8J26CAHM3/I differ from unidirectional variants like SMB10J26A?
SMB8J26CAHM3/I is bidirectional with symmetric clamping behavior and no cathode marking, whereas SMB10J26A is unidirectional (cathode-banded), offers higher PPPM (1000 W), and supports 100 A IFSM. The "8" prefix denotes 800 W rating and bidirectional design; "10" indicates 1000 W and unidirectional configuration - they are not interchangeable without circuit redesign.
What is the thermal resistance from junction to ambient for SMB8J26CAHM3/I?
The SMB8J26CAHM3/I 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. However, its junction-to-lead resistance (RθJL) is 20 °C/W - a more relevant metric for SMT applications where heat flows primarily into PCB copper rather than ambient air.
Does SMB8J26CAHM3/I require special PCB layout considerations?
Yes - optimal performance requires mounting SMB8J26CAHM3/I on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve rated PPPM and thermal dissipation. The datasheet specifies this pad layout for all electrical ratings; reducing pad size degrades both surge handling and thermal performance, potentially causing premature failure during repetitive transients.
SMB8J26CAHM3/I 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- 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)
SMB8J26CAHM3/I FAQ
1.How can I place an order for SMB8J26CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHM3/I 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 SMB8J26CAHM3/I reliable?
The price and inventory of SMB8J26CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHM3/I?
SMB8J26CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHM3/I 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 SMB8J26CAHM3/I?
For technical support, including SMB8J26CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHM3/I requirements.
6.How does Aetrix verify that SMB8J26CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHM3/I 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 SMB8J26CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHM3/I?
All SMB8J26CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHM3/I, 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 SMB8J26CAHM3/I part is unused and in its original packaging.
Return procedure for SMB8J26CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHM3/I 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 …
