My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ26CAHM3/H
- Part No.:
- SMBJ26CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHM3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ26CAHM3/H 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 signal or power lines. It features 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage at 14.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ26CAHM3/H datasheet, SMBJ26CAHM3/H pinout, SMBJ26CAHM3/H application, or SMBJ26CAHM3/H equivalent, this device is evaluated for bidirectional surge protection in DC power rails, RS-485 lines, and automotive body electronics where low clamping voltage and AEC-Q101 qualification are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) ranging from 28.9 V to 31.9 V at 1 mA test current and ±0.097 %/°C temperature coefficient. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients such as ESD or inductive switching spikes.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it delivers stable clamping performance up to 150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with automotive-grade reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - guaranteed symmetrical breakdown threshold in both directions |
| VC @ IPPM | 42.1 V at 14.3 A - clamped voltage under 10/1000 µs surge, limiting downstream stress |
| PPPM | 600 W - peak transient energy absorption capability without failure |
| ID @ VWM | 1.0 µA - ultra-low leakage ensuring minimal standby power impact |
| TJ max | +150 °C - extended thermal range supports under-hood and industrial ambient conditions |
| Package | SMB (DO-214AA) - industry-standard footprint compatible with automated placement and reflow |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated terminals solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Common terminal for symmetrical clamping; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Identical functional role to Anode; no physical distinction - device conducts equally in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems without degradation |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and infotainment power rails |
| Halogen-free & RoHS | Meets environmental compliance requirements for global OEM production and industrial certifications |
| MSL Level 1 | Allows unlimited floor life and standard reflow processing without baking preconditioning |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to relay coil flyback in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground to clamp ±1 kV transients induced by nearby contactor switching. Use Value: Clamps to ≤42.1 V within <1 ns, preventing damage to 3.3 V ADC inputs and maintaining measurement integrity. |
Use Scenario: Safeguarding LIN bus transceiver power supply pins against load dump and jump-start events in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V rail upstream of LDO, absorbing repetitive 600 W pulses per ISO 7637-2 Pulse 5a. Use Value: Maintains VWM = 26 V margin above nominal 12 V system, enabling robust operation without false triggering. |
| RS-485 Communication Line | DC Power Input Protection |
|
Use Scenario: Shielding differential data lines in industrial PLC backplanes from EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Paired SMBJ26CAHM3/H devices across A-GND and B-GND to suppress common-mode surges. Use Value: Symmetrical 28.9–31.9 V VBR ensures balanced clamping, preserving signal integrity and common-mode rejection. |
Use Scenario: Front-end protection of 24 V DC input to programmable logic controllers subjected to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Primary clamping element between input and bulk capacitor, diverting >100 A surge currents away from upstream rectifiers. Use Value: 42.1 V VC limits voltage seen by downstream 35 V-rated electrolytics, extending capacitor lifetime and system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable for commercial/industrial use where halogen-free requirement is waived | Select when cost sensitivity outweighs halogen-free mandate and automotive qualification remains essential |
| SMAJ26CAHM3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), identical VWM/VBR/VC ratings | Suitable only for lower-energy transients; limited thermal mass reduces surge repetition tolerance | Choose for space-constrained designs where 600 W rating is not required and board area is premium |
Compared with SMBJ26CAHM3/H, the HE3/H variant trades halogen-free status for slightly lower cost while retaining AEC-Q101, whereas SMAJ26CAHM3 sacrifices surge robustness and thermal performance for footprint reduction - making SMBJ26CAHM3/H optimal for high-reliability 24 V systems demanding full 600 W immunity.
Availability
SMBJ26CAHM3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, RS-485 communication lines, and DC power input protection requiring stable component supply with automotive-grade reliability and halogen-free compliance.
Supply support for SMBJ26CAHM3/H 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 SMBJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom infrastructure where consistent clamping behavior and long-term stability under thermal cycling are mandatory.
FAQ
What does the 'CA' suffix indicate in SMBJ26CAHM3/H?
The 'CA' suffix denotes a bidirectional configuration - meaning SMBJ26CAHM3/H provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ26AHM3/H), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC-coupled or floating signal paths.
Is SMBJ26CAHM3/H qualified for automotive applications?
Yes, SMBJ26CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with '_H' reel packaging). This qualification validates its reliability for automotive use cases including body electronics, infotainment power rails, and LIN/CAN node protection under temperature cycling, humidity, and mechanical shock per AEC standards.
What is the maximum clamping voltage of SMBJ26CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ26CAHM3/H is 42.1 V at 14.3 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on protected circuitry during worst-case transient events, ensuring downstream 35 V-rated components remain within safe operating limits.
How does the HM3 suffix differ from E3 or HE3 in SMBJ26CAHM3/H?
The HM3 suffix indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing SMBJ26CAHM3/H from E3 (RoHS only, commercial grade) and HE3 (RoHS + AEC-Q101, but not halogen-free). All three share identical electrical characteristics and SMB package dimensions, differing solely in material composition and qualification scope.
Can SMBJ26CAHM3/H replace SMBJ24CAHM3/H in an existing design?
SMBJ26CAHM3/H is not a direct replacement for SMBJ24CAHM3/H due to its higher 26 V stand-off voltage (VWM) versus 24 V - potentially increasing susceptibility to false triggering near system operating voltage. While both share SMB package and AEC-Q101/HM3 compliance, the 2 V VWM difference requires verification of margin against maximum steady-state rail voltage before substitution.
SMBJ26CAHM3/H 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/H FAQ
1.How can I place an order for SMBJ26CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHM3/H 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/H reliable?
The price and inventory of SMBJ26CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHM3/H?
SMBJ26CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHM3/H 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/H?
For technical support, including SMBJ26CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHM3/H requirements.
6.How does Aetrix verify that SMBJ26CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHM3/H?
All SMBJ26CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ26CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHM3/H 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…
