My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J26CAHE3/5B
- Part No.:
- SMB8J26CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J26CAHE3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,548
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J26CAHE3/5B 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 standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), 42.1 V 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 SMB8J26CAHE3/5B datasheet, SMB8J26CAHE3/5B pinout, SMB8J26CAHE3/5B application, or SMB8J26CAHE3/5B equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °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 picoseconds to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±10%), while the bidirectional configuration enables symmetric clamping across both polarities without polarity dependency.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and delivers 800 W peak pulse power under standardized 10/1000 µs surge conditions - validated with derating above 25 °C ambient per Fig. 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 28.9 V / 31.9 V at 1.0 mA - defines guaranteed breakdown threshold range for design margining |
| VC @ IPPM | 42.1 V at 19.0 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 800 W - peak transient energy absorption capability under standard waveform |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with IPC-7351B standard pad layout |
Pinout & Package
SMB8J26CAHE3/5B uses the SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, 5.59 mm × 4.06 mm body, 2.20 mm height, and no polarity marking (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band - bidirectional clamping requires no orientation during placement |
| Case (body) | Thermal and mechanical interface | Non-electrical; soldered to PCB copper pads (min. 5.0 mm × 5.0 mm per terminal) for thermal dissipation and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term VBR stability and reduced parameter drift over temperature and life cycle |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-induced damage |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Shunt-type transient clamp placed directly at connector entry point to divert surge energy before reaching protected IC. Use Value: Limits clamped voltage to 42.1 V, well below typical 48 V absolute maximum ratings of automotive-grade transceivers and ADC front-ends. | Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring surges and ground loop transients in factory automation. IC Role / Device Role / Timing Role: Bidirectional voltage limiter installed across isolated signal pairs (e.g., 24 V DC inputs) to suppress ±1 kV EFT and lightning-induced spikes. Use Value: Delivers 800 W peak power handling with <1.0 µA leakage, preserving signal fidelity while meeting IEC 61000-4-4/5 immunity requirements. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers in base station equipment from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of common-mode chokes and secondary-stage protection to absorb bulk surge energy. Use Value: Symmetric bidirectional clamping eliminates need for dual unidirectional devices, reducing BOM count and PCB area in space-constrained telecom modules. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Clamp diode mounted across motor terminals or H-bridge outputs to quench inductive flyback voltage. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and maintains stable VBR up to +150 °C junction temperature during sustained motor stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J26CAHM3/5B | Halogen-free molding compound; identical electrical specs and AEC-Q101 qualification | Required where halogen-free compliance is mandated (e.g., EU WEEE/EcoDesign) | Select when environmental compliance exceeds commercial RoHS requirements |
| SMAJ26CAHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC | Suitable for lower-energy transients or space-constrained layouts where 800 W margin is not required | Choose for cost-sensitive consumer designs with reduced surge threat profile |
Compared with SMB8J26CAHE3/5B, the HM3 variant offers identical protection performance with enhanced material sustainability, while the SMAJ26CAHE3/A trades 50 % peak power capacity for 30 % smaller footprint - enabling trade-offs between robustness, size, and regulatory compliance.
Availability
SMB8J26CAHE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply with AEC-Q101 validation and full traceability.
Supply support for SMB8J26CAHE3/5B 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-grade qualification.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh-environment applications such as automotive powertrain and chassis systems.
FAQ
What is the clamping voltage of SMB8J26CAHE3/5B at its rated peak pulse current?
The SMB8J26CAHE3/5B has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 19.0 A under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMB8J26CAHE3/5B achieves this with low incremental resistance and stable junction characteristics.
Is SMB8J26CAHE3/5B suitable for automotive applications?
Yes, SMB8J26CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS compliance and qualification to the AEC stress test standard for discrete semiconductors. It supports operation from -55 °C to +150 °C junction temperature and meets MSL Level 1 for lead-free reflow, making it appropriate for engine control units, body electronics, and ADAS sensor modules. The SMB8J26CAHE3/5B data sheet confirms qualification status in the Mechanical Data section.
How does the bidirectional configuration of SMB8J26CAHE3/5B affect PCB layout?
The SMB8J26CAHE3/5B has no polarity marking - its bidirectional structure means both terminals are functionally identical, eliminating orientation constraints during automated placement. Unlike unidirectional TVS diodes, there is no cathode band; the device clamps symmetrically for positive and negative transients. This simplifies layout, reduces assembly errors, and avoids the need for silkscreen polarity indicators. The SMB8J26CAHE3/5B must still be mounted on recommended 5.0 mm × 5.0 mm copper pads per terminal for thermal and surge performance.
What is the maximum reverse leakage current for SMB8J26CAHE3/5B at its standoff voltage?
At its 26 V standoff voltage (VWM), the SMB8J26CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and battery-powered systems where standby current matters. Leakage remains within specification across the full operating temperature range and is verified per the Electrical Characteristics table in the Vishay datasheet for SMB8J26CAHE3/5B.
Does SMB8J26CAHE3/5B require derating at elevated ambient temperatures?
Yes, SMB8J26CAHE3/5B requires derating of peak pulse power above TA = 25 °C, as defined in Figure 2 of the Vishay datasheet. For example, at 85 °C ambient, its 800 W PPPM rating drops to approximately 560 W - a 30 % reduction. Derating follows a linear curve down to zero power at +150 °C junction temperature. Designers must calculate actual junction temperature using RθJA = 72 °C/W and ensure the SMB8J26CAHE3/5B remains within safe operating area under worst-case surge and thermal conditions.
SMB8J26CAHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J26CAHE3/5B FAQ
1.How can I place an order for SMB8J26CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J26CAHE3/5B 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 SMB8J26CAHE3/5B reliable?
The price and inventory of SMB8J26CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J26CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J26CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J26CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J26CAHE3/5B?
SMB8J26CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J26CAHE3/5B 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 SMB8J26CAHE3/5B?
For technical support, including SMB8J26CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J26CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J26CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J26CAHE3/5B 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 SMB8J26CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J26CAHE3/5B?
All SMB8J26CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J26CAHE3/5B, 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 SMB8J26CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J26CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J26CAHE3/5B 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 …
