My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ26CAHM3/I
- Part No.:
- SMBJ26CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHM3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ26CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤42.1 V at 14.3 A peak surge current - deployed in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ26CAHM3/I datasheet, SMBJ26CAHM3/I pinout, SMBJ26CAHM3/I application, or SMBJ26CAHM3/I equivalent, this page delivers verified electrical specs, thermal derating behavior, bidirectional clamping performance, AEC-Q101 qualification status, and halogen-free RoHS-compliant sourcing details.
Technical Context
This device operates as a voltage-clamping protector with symmetrical bidirectional conduction - no polarity marking required. Its silicon avalanche junction provides sub-nanosecond response time and low dynamic impedance under transient stress, enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5).
Rated for -55 °C to +150 °C junction temperature, it uses glass-passivated chip construction and meets MSL Level 1 (260 °C reflow peak). The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - validated for automotive powertrain and body electronics per JESD22-A114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤42.1 V at IPPM = 14.3 A (10/1000 µs) - peak voltage seen by protected circuit; determines safe IC survival margin |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 µs surge; supports IEC 61000-4-5 Level 4 compliance |
| ID (Reverse Leakage) | ≤1.0 µA at 26 V - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max. | +150 °C - enables placement near hot components (e.g., power MOSFETs, DC/DC converters) without thermal derating penalty |
| Package | SMB (DO-214AA) - 0.205" × 0.130" footprint; compatible with standard SMT pick-and-place and reflow profiles (260 °C peak) |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Identical conduction in both directions; connects across protected line and ground or between differential lines |
| Case (SMB body) | Mechanical mounting / thermal path | No electrical connection; provides mechanical stability and contributes to thermal dissipation via PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., CAN, RS-485), or floating power rails without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment power supplies |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JEDEC J-STD-020 MSL Level 1 reflow compatibility for high-reliability assembly |
| 600 W peak pulse power | Supports robust immunity to 4 kV contact / 8 kV air IEC 61000-4-2 ESD and 1 kV/2 kV IEC 61000-4-5 surge waveforms |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic interfaces downstream |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog input channels of vehicle cabin temperature or pressure sensors exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching ADC front-end. Use Value: Maintains signal integrity under 100 V/100 ms load-dump events while adding <1 pF capacitance - no bandwidth degradation. |
Use Scenario: Safeguarding 24 V digital input terminals of programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input optocoupler terminals to limit voltage to safe levels during 1 kV surge tests. Use Value: Enables compliance with IEC 61000-4-4 Level 4 (4 kV) without external series impedance or timing delays. |
| Telecom Power Supply Input | Consumer USB Port ESD Protection |
|
Use Scenario: Secondary-side transient suppression on 12 V DC output rails of telecom AC/DC adapters subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamp installed between +12 V rail and return to absorb repetitive 600 W surges without degradation. Use Value: Extends system lifetime by preventing cumulative damage to downstream DC/DC regulators and PMICs. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in portable audio devices subjected to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed differentially across D+ and D− to shunt ESD current before transceiver IC. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge with <0.5 V residual voltage - preserves USB signal eye diagram. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial equipment where automotive qualification is not mandated | Select when cost sensitivity outweighs halogen-free or automotive requirements |
| SMAJ26CAHM3 | Lower 400 W PPPM rating; SMA package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients; not recommended for IEC 61000-4-5 Level 4 or automotive load-dump | Choose only for space-constrained consumer designs with <400 W surge exposure |
Compared with SMBJ26CAHM3/I, the HE3/I variant trades halogen-free content and AEC-Q101 validation for lower unit cost, while the SMAJ26CAHM3 sacrifices 33 % pulse power handling and thermal robustness for 30 % smaller board area - making SMBJ26CAHM3/I the optimal choice for automotive and industrial surge-critical designs.
Availability
SMBJ26CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and telecom power supply protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ26CAHM3/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 optimization.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and telecom systems - engineered for AEC-Q101 compliance, robust surge endurance, and seamless integration into automated SMT manufacturing.
FAQ
What does the "CA" suffix indicate in SMBJ26CAHM3/I?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ26CAHM3/I conducts and clamps symmetrically in both polarities, unlike unidirectional "A" variants that require correct cathode orientation. This makes SMBJ26CAHM3/I ideal for AC-coupled lines, differential buses, or floating grounds where polarity cannot be guaranteed.
Is SMBJ26CAHM3/I suitable for protecting a 24 V automotive power rail?
Yes - SMBJ26CAHM3/I has a 26 V stand-off voltage (VWM), providing adequate margin above nominal 24 V systems while clamping transients to ≤42.1 V. Its AEC-Q101 qualification, 150 °C max junction temperature, and 600 W pulse rating make it appropriate for load-dump and ISO 7637-2 pulse protection on 24 V rails in commercial and light-duty vehicles.
How does the HM3 suffix affect compliance and assembly of SMBJ26CAHM3/I?
The HM3 suffix certifies SMBJ26CAHM3/I as halogen-free, RoHS-compliant, and AEC-Q101 qualified - meeting automotive environmental and reliability standards. It also confirms MSL Level 1 moisture sensitivity and compatibility with standard lead-free reflow profiles up to 260 °C, eliminating bake requirements prior to assembly.
What is the maximum allowable PCB pad size for SMBJ26CAHM3/I to achieve rated 600 W pulse power?
To achieve the full 600 W peak pulse power rating, SMBJ26CAHM3/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation and cause premature failure under repeated surges - derating curves in Figure 2 quantify power reduction above 25 °C ambient.
Can SMBJ26CAHM3/I replace SMBJ24CAHM3/I in an existing design?
Yes, with verification - SMBJ26CAHM3/I offers 2 V higher VWM and slightly higher VBR (28.9–31.9 V vs. 26.7–29.5 V), resulting in marginally later turn-on but identical clamping performance (VC = 42.1 V vs. 38.9 V). System-level testing is required to confirm no false triggering during normal operation, especially in low-voltage tolerant circuits.
SMBJ26CAHM3/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):
- 14.3A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ26CAHM3/I FAQ
1.How can I place an order for SMBJ26CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHM3/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 SMBJ26CAHM3/I reliable?
The price and inventory of SMBJ26CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHM3/I?
SMBJ26CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHM3/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 SMBJ26CAHM3/I?
For technical support, including SMBJ26CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHM3/I requirements.
6.How does Aetrix verify that SMBJ26CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHM3/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 SMBJ26CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHM3/I?
All SMBJ26CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHM3/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 SMBJ26CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ26CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHM3/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
