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Vishay General Semiconductor - Diodes Division SMBJ28CAHE3/5B
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- Part No.:
- SMBJ28CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CAHE3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,053
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Product details
Overview
SMBJ28CAHE3/5B 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 a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ28CAHE3/5B datasheet, SMBJ28CAHE3/5B pinout, SMBJ28CAHE3/5B application, or SMBJ28CAHE3/5B equivalent, key selection criteria include bidirectional surge protection capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.4), thermal resistance (RθJA = 100 °C/W), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 150 °C max junction temperature supports operation in under-hood automotive environments.
The device uses a planar silicon junction structure optimized for fast response (<1 ns) to ESD and lightning-induced transients. It meets UL 497B recognition (QVGQ2) and is rated MSL Level 1 per J-STD-020, with peak reflow temperature up to 260 °C - confirming suitability for standard lead-free PCB assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage seen by protected circuit during 600 W transient; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surge tests. |
| IPPM | 13.2 A - Peak surge current supported without failure; enables protection of 24 V CAN, LIN, or sensor supply rails. |
| TJ max | +150 °C - Maximum junction temperature; supports placement near heat sources in engine control modules. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design. |
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 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Terminal 1 - Identical electrical behavior to Terminal 2; no functional distinction between pins due to bidirectional symmetry. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Terminal 2 - Electrically interchangeable with Terminal 1; device conducts identically in either direction above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - supports PPAP documentation and long-term reliability requirements. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) on 24 V systems without degradation when mounted per recommended pad layout. |
| Clamping voltage ≤ 45.4 V | Ensures protected 24 V logic or microcontroller I/O remains below absolute maximum ratings during 13.2 A transient events. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning - eliminates moisture sensitivity handling overhead. |
| Glass passivated junction | Provides stable VBR tolerance and low leakage (<1 µA) over temperature and lifetime - critical for low-power sensor nodes. |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Bus Node |
|---|---|
Use Scenario: Protects LIN bus transceivers and door actuator drivers from load dump and alternator ripple transients in 12 V/24 V vehicle architectures. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across LIN signal pair or 24 V supply rail to limit transient excursions. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) events by clamping to ≤45.4 V - preventing transceiver latch-up or damage. |
Use Scenario: Shields CAN FD physical layer transceivers (e.g., TCAN1042) from ESD and coupled noise in factory automation networks. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS installed differential-mode across CAN_H/CAN_L lines near connector entry point. Use Value: Limits common-mode surge energy with <1 ns response, preserving bit timing integrity up to 5 Mbps CAN FD data rates. |
| Smart Sensor Signal Conditioning | Power Supply Input Protection |
Use Scenario: Safeguards analog front-end of MEMS pressure sensors in HVAC or medical devices exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamp on sensor output line (e.g., 0–5 V ratiometric output) referenced to system ground. Use Value: Prevents op-amp input stage damage while maintaining DC accuracy - leakage <1 µA at 28 V ensures minimal offset error. |
Use Scenario: Guards 24 V DC input of industrial PLC I/O modules against accidental reverse polarity and surge coupling from adjacent AC lines. IC Role / Device Role / Timing Role: Primary transient suppressor placed upstream of DC-DC converter input filter capacitor. Use Value: Absorbs 600 W surges without derating at +85 °C ambient - extends mean time between failures in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM or regional environmental regulations. | Choose SMBJ28CA-M3/5B when halogen-free materials are required; otherwise SMBJ28CAHE3/5B offers same performance with standard RoHS compliance. |
| SMCJ28CAHE3/5B | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Used where higher surge energy absorption or improved thermal dissipation is needed - e.g., main power input vs. signal line. | Choose SMCJ28CAHE3/5B only if system-level surge testing exceeds 600 W; SMBJ28CAHE3/5B remains optimal for space-constrained signal-level protection. |
Compared with SMBJ28CA-M3/5B, SMBJ28CAHE3/5B provides identical surge protection performance with standard RoHS compliance; versus SMCJ28CAHE3/5B, it trades higher power handling for 40% smaller footprint and compatibility with fine-pitch PCB layouts.
Availability
SMBJ28CAHE3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN networks, smart sensor interfaces, and 24 V power supply inputs requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ28CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - balancing compact size, fast response, and AEC-Q101 compliance.
FAQ
What does the "CA" suffix indicate in SMBJ28CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ28CAHE3/5B clamps voltage transients equally in both polarities, unlike unidirectional "A" variants that conduct only in reverse bias. This makes SMBJ28CAHE3/5B ideal for protecting AC-coupled or differential signal lines such as CAN or LIN buses where polarity reversal may occur.
Is SMBJ28CAHE3/5B qualified for automotive use?
Yes, SMBJ28CAHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code "HE3" suffix and documentation in datasheet 88392. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating SMBJ28CAHE3/5B for under-hood and chassis-mounted automotive applications.
What is the clamping voltage of SMBJ28CAHE3/5B at its rated peak pulse current?
The maximum clamping voltage (VC) of SMBJ28CAHE3/5B is 45.4 V at 13.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that any downstream circuit protected by SMBJ28CAHE3/5B will not experience voltages exceeding 45.4 V during standardized surge events.
How does the SMB (DO-214AA) package of SMBJ28CAHE3/5B compare to SMC (DO-214AB) in thermal performance?
SMBJ28CAHE3/5B in SMB package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads, whereas SMC-packaged equivalents like SMCJ28CAHE3/5B achieve ~50 °C/W. This means SMBJ28CAHE3/5B requires more careful thermal layout in high-duty-cycle surge environments, but offers 40% smaller footprint for dense PCB designs.
Does SMBJ28CAHE3/5B require polarity orientation during PCB placement?
No - SMBJ28CAHE3/5B is a bidirectional TVS diode with no polarity marking on the SMB (DO-214AA) case. Both terminals are functionally identical, and the device clamps symmetrically regardless of orientation. This simplifies automated placement and eliminates risk of reverse installation errors in production.
SMBJ28CAHE3/5B 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.5V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ28CAHE3/5B FAQ
1.How can I place an order for SMBJ28CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CAHE3/5B 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 SMBJ28CAHE3/5B reliable?
The price and inventory of SMBJ28CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ28CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CAHE3/5B?
SMBJ28CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CAHE3/5B 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 SMBJ28CAHE3/5B?
For technical support, including SMBJ28CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ28CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ28CAHE3/5B 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 SMBJ28CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ28CAHE3/5B?
All SMBJ28CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CAHE3/5B, 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 SMBJ28CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ28CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CAHE3/5B Tags
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