My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J26CAHM3_B/I
- Part No.:
- SMB8J26CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHM3_B/I.pdf
- Description:
- 800W,26V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,289
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J26CAHM3_B/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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J26CAHM3_B/I datasheet, SMB8J26CAHM3_B/I pinout, SMB8J26CAHM3_B/I application, or SMB8J26CAHM3_B/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, 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-clamping protector using an avalanche breakdown mechanism, with symmetrical bidirectional conduction enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, critical for repeatable clamping performance under repetitive surge stress.
Designed to meet ANSI/IEEE C62.35 standards, it delivers fast response time (<1 ns) and supports operation across -55 °C to +150 °C junction temperature range. The SMB (DO-214AA) package provides MSL Level 1 moisture sensitivity and complies with JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 42.1 V at 19.0 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 800 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained PCBs |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance supports sustained surge duty cycles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, compliant with J-STD-002 solderability and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Both terminals are functionally symmetric; either can serve as input or return in bidirectional operation |
| Anode (Cathode) | Transient current return path | No color band or marking - terminals are interchangeable for AC-coupled or differential line protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC JS709E and EU RoHS Directive 2011/65/EU |
| Low RθJL (20 °C/W) | Enables efficient heat transfer to PCB copper pads, supporting repeated 800 W surges without thermal runaway |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - compatible with standard SMT reflow without baking |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and outputs against load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt surge energy before reaching transceiver pins. Use Value: Limits induced transients to ≤42.1 V, preserving transceiver functionality during 10/1000 µs 19 A surges per ISO 16750-2. | Use Scenario: Safeguarding two-wire CAN FD data lines in factory automation controllers exposed to motor switching noise. IC Role / Device Role / Timing Role: Symmetric protection element across differential pair, maintaining common-mode rejection while clamping differential spikes. Use Value: 1.0 µA leakage at 26 V avoids DC bias shift on high-impedance bus terminations; 800 W rating handles repetitive EFT bursts. |
| Consumer Power Adapter Input | Medical Grade Signal Conditioning |
Use Scenario: Secondary-side overvoltage protection on 24 V DC output rails of wall-mounted power adapters. IC Role / Device Role / Timing Role: Standoff-rated clamp absorbing flyback spikes from relay or solenoid switching on same board. Use Value: 26 V VWM aligns with 24 V nominal rail; 42.1 V VC prevents latch-up in downstream LDOs and microcontrollers. | Use Scenario: Shielding analog front-end inputs (e.g., ECG electrode amplifiers) from ESD events per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Low-capacitance, low-leakage TVS placed immediately after connector to prevent charge injection into precision op-amps. Use Value: Sub-µA leakage preserves nanoamp-level input bias currents; SMB footprint minimizes parasitic capacitance vs. larger packages. |
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_B/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable where halogen-free requirement is not mandated by OEM or regional regulation | Select when cost optimization is prioritized and halogen content is unrestricted in final assembly |
| SMAJ26CA | Lower PPPM (400 W), higher RθJA (110 °C/W), SMA package (smaller pad area) | Limited to lower-energy transients; unsuitable for automotive load-dump scenarios requiring 800 W | Choose only for space-constrained consumer designs with verified <400 W surge exposure |
Compared with SMB8J26CAHM3_B/I, the HE3 variant offers identical surge robustness without halogen-free assurance, while SMAJ26CA trades power handling and thermal performance for smaller footprint - making SMB8J26CAHM3_B/I optimal for AEC-Q101-compliant, high-reliability 800 W protection.
Availability
SMB8J26CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and medical signal conditioning circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J26CAHM3_B/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-qualified transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J26CAHM3_B/I at its rated peak pulse current?
The SMB8J26CAHM3_B/I has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 19.0 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 42.1 V during standardized surge events - critical for safeguarding 3.3 V or 5 V logic interfaces in automotive and industrial systems.
Is SMB8J26CAHM3_B/I suitable for automotive applications?
Yes, SMB8J26CAHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It meets stringent automotive requirements including temperature cycling, high-temperature reverse bias, and mechanical shock testing - making it approved for use in engine control units, body electronics, and ADAS sensor modules where reliability under thermal and electrical stress is mandatory.
What does the "HM3_B/I" suffix indicate in SMB8J26CAHM3_B/I?
The "HM3" denotes halogen-free and RoHS-compliant construction; "B" indicates revision level B per Vishay's internal documentation; "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This ordering code ensures full compliance traceability, moisture sensitivity level 1 handling, and compatibility with high-speed pick-and-place equipment.
How does SMB8J26CAHM3_B/I differ from unidirectional variants like SMB10J26A?
SMB8J26CAHM3_B/I is bidirectional with symmetrical clamping for AC or differential signals, whereas SMB10J26A is unidirectional and intended for DC-biased lines. SMB8J26CAHM3_B/I offers 800 W PPPM and 19.0 A IPPM, while SMB10J26A delivers 1000 W PPPM and 23.8 A IPPM - reflecting different surge energy priorities and circuit topology constraints in their respective applications.
Can SMB8J26CAHM3_B/I be used in place of SMBJ26CA?
No - SMBJ26CA is obsolete and superseded by the SMB8JxxCA series. While both share SMB (DO-214AA) package and similar VWM, SMB8J26CAHM3_B/I features updated process control, tighter VBR tolerance (28.9–31.9 V vs. older ±5%), improved thermal resistance (RθJL = 20 °C/W), and mandatory AEC-Q101 qualification - making it the designated replacement with enhanced consistency and automotive suitability.
SMB8J26CAHM3_B/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:
- 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)
SMB8J26CAHM3_B/I FAQ
1.How can I place an order for SMB8J26CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHM3_B/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_B/I reliable?
The price and inventory of SMB8J26CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHM3_B/I?
SMB8J26CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHM3_B/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_B/I?
For technical support, including SMB8J26CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHM3_B/I requirements.
6.How does Aetrix verify that SMB8J26CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHM3_B/I?
All SMB8J26CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMB8J26CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHM3_B/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 …
