My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J26CAHE3_B/I
- Part No.:
- SMB8J26CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHE3_B/I.pdf
- Description:
- 800W,26V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,576
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J26CAHE3_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 SMB8J26CAHE3_B/I datasheet, SMB8J26CAHE3_B/I pinout, SMB8J26CAHE3_B/I application, or SMB8J26CAHE3_B/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, 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 TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior across -55 °C to +150 °C operating range, with bidirectional symmetry enabling protection on AC-coupled or floating lines without polarity concerns.
The device meets ANSI/IEEE C62.35 surge standards and is rated for 1000 W unidirectional / 800 W bidirectional peak pulse power. Its 1.0 µA max reverse leakage at VWM and 28.9–31.9 V breakdown voltage range (VBR at 1 mA) support precise overvoltage thresholding in noise-sensitive analog and digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown window ensures reliable triggering above system operating voltage while avoiding false trips. |
| VC @ IPPM | 42.1 V at 19.0 A - Clamping voltage under 10/1000 µs surge defines worst-case stress on downstream ICs during transient events. |
| PPPM | 800 W - Peak pulse power rating determines survivability against standardized lightning/surge waveforms per IEC 61000-4-5. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance enables effective heat dissipation into PCB copper, critical for repeated surge duty cycles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A114. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint, compatible with standard 7" and 13" tape-and-reel handling (I = 3200 pcs/reel). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow). Polarity: bidirectional - no cathode marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient shunt path | Both terminals function identically; connects across protected line and return to clamp bidirectional surges without orientation dependency. |
| Case / Body | Thermal conduction path | Plastic body transfers heat to solder joints and PCB copper; requires minimum 5.0 mm × 5.0 mm pad area per terminal for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive environments including extended temperature cycling (-55 °C to +150 °C) and humidity exposure. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh industrial settings. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS inputs. |
| MSL Level 1 compliance | Enables direct placement without baking; supports lead-free reflow up to 260 °C peak, simplifying manufacturing flow. |
| RoHS-compliant & halogen-free option | HE3 suffix indicates RoHS-compliant construction; HM3 variant adds halogen-free molding compound for green electronics compliance. |
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 ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Maintains 26 V VWM margin above 12 V/24 V vehicle systems while clamping to ≤42.1 V, preventing damage to 5 V or 3.3 V interface ICs. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring transients from solenoid switching or motor contactors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across isolated input channels to absorb ±1 kV/500 A surges defined in IEC 61000-4-4 and -4-5. Use Value: Delivers 800 W peak pulse power handling with symmetrical clamping, eliminating need for dual unidirectional devices in AC-coupled or floating-input designs. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE detection circuits from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary front-end TVS on RJ45 jack side, coordinated with secondary GDT or MOV for staged protection. Use Value: Fast response (<1 ps) and low clamping voltage preserve signal integrity on 100BASE-TX lines while meeting GR-1089-CORE telecom surge requirements. |
Use Scenario: Adding secondary-level surge suppression on USB-C or barrel-jack inputs of smart home hubs and audio amplifiers. IC Role / Device Role / Timing Role: Final-stage clamp after primary fuse and common-mode choke, targeting human-body-model (HBM) and IEC 61000-4-2 ESD events. Use Value: 1.0 µA max leakage at 26 V VWM avoids loading low-power standby circuits; SMB footprint allows dense layout near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CAHM3_B/I | Halogen-free molding compound; identical electrical specs and AEC-Q101 qualification. | Required for RoHS-compliant products mandating halogen-free materials (e.g., EU WEEE/EcoDesign). | Select when regulatory compliance requires halogen-free construction; otherwise HE3 offers same performance at lower cost. |
| SMC8J26CAHE3_A/I | Larger SMC (DO-214AB) package; 1500 W PPPM rating; same VWM, VBR, VC, and AEC-Q101 status. | Used where higher surge energy (e.g., 10/1000 µs 30 A) exceeds SMB8J26CAHE3_B/I's 19 A IPPM limit. | Choose SMC variant only if design requires >800 W surge handling; SMB offers better board density and lower parasitic inductance. |
Compared with SMB8J26CAHE3_B/I, the HM3 variant adds halogen-free compliance without electrical trade-offs, while the SMC8J26CAHE3_A/I provides 87.5% higher peak power at the cost of 40% larger footprint and increased layout area - making SMB8J26CAHE3_B/I optimal for space-constrained automotive and industrial modules requiring certified AEC-Q101 performance.
Availability
SMB8J26CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J26CAHE3_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, 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 for robustness against repetitive surges, wide temperature operation, and seamless integration into automated SMT assembly lines.
FAQ
What is the clamping voltage of SMB8J26CAHE3_B/I under a 10/1000 µs surge?
The SMB8J26CAHE3_B/I clamps to a maximum of 42.1 V when subjected to its rated 19.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs (e.g., microcontrollers or transceivers) remain within absolute maximum ratings.
Is SMB8J26CAHE3_B/I suitable for automotive applications?
Yes, SMB8J26CAHE3_B/I is AEC-Q101 qualified and specifically designed for automotive use. Its qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per JESD22-A114. The HE3 suffix confirms RoHS compliance, and the 26 V VWM aligns with 12 V/24 V vehicle electrical systems - making SMB8J26CAHE3_B/I appropriate for CAN/LIN bus protection, ADAS sensor interfaces, and body control module I/O stages.
How does the SMB8J26CAHE3_B/I differ from unidirectional variants like SMB10J26AHE3_B/I?
The SMB8J26CAHE3_B/I is bidirectional with symmetrical clamping characteristics, whereas SMB10J26AHE3_B/I is unidirectional and conducts only in reverse bias. SMB8J26CAHE3_B/I has a lower peak pulse power rating (800 W vs. 1000 W) and different IPPM (19.0 A vs. 23.8 A), reflecting its dual-path architecture. It is selected for AC-coupled, floating, or polarity-agnostic lines - unlike unidirectional types used on DC-biased rails where forward conduction must be blocked.
What is the thermal resistance specification for SMB8J26CAHE3_B/I?
SMB8J26CAHE3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This RθJL value enables efficient heat transfer into the PCB, supporting repeated surge events without thermal runaway - essential for applications like industrial motor drives where transients occur frequently.
Does SMB8J26CAHE3_B/I require special PCB layout considerations?
Yes, SMB8J26CAHE3_B/I requires minimum 5.0 mm × 5.0 mm copper pad area per terminal to achieve rated 800 W pulse power dissipation. Short, wide traces should connect it directly across the protected line and return path, minimizing inductance that could cause voltage overshoot. Avoid thermal reliefs on pads, and ensure solder mask defined pads for optimal thermal conduction - layout adherence is mandatory to realize the full SMB8J26CAHE3_B/I surge capability.
SMB8J26CAHE3_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)
SMB8J26CAHE3_B/I FAQ
1.How can I place an order for SMB8J26CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHE3_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 SMB8J26CAHE3_B/I reliable?
The price and inventory of SMB8J26CAHE3_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 SMB8J26CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHE3_B/I?
SMB8J26CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHE3_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 SMB8J26CAHE3_B/I?
For technical support, including SMB8J26CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J26CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHE3_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 SMB8J26CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHE3_B/I?
All SMB8J26CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHE3_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 SMB8J26CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMB8J26CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHE3_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 …
