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Vishay General Semiconductor - Diodes Division SMBJ28CAHE3_B/H
- Part No.:
- SMBJ28CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CAHE3_B/H.pdf
- Description:
- 600W,28V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SMBJ28CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the 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 a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ28CAHE3_B/H datasheet, SMBJ28CAHE3_B/H pinout, SMBJ28CAHE3_B/H application, or SMBJ28CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, low incremental surge resistance, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the low clamping ratio (VC/VBR ≈ 1.42) minimizes overvoltage stress during ESD or lightning-induced surges.
The device is rated for repetitive 600 W pulses at 0.01 % duty cycle and derates linearly above 25 °C ambient per Fig. 2; it supports operating junction temperatures from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working 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 range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamping voltage limits downstream component stress during 10/1000 µs transients. |
| PPPM | 600 W - Peak pulse power handling capacity under standardized surge waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 13.2 A - Peak pulse current supported at VC; determines minimum trace width and PCB layout clearance requirements. |
| TJ max. | +150 °C - Maximum junction temperature allows operation in high-ambient environments like motor drives or outdoor telecom enclosures. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking needs for sustained surge duty. |
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 leads, RoHS-compliant and AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current in either direction; connects to protected line without polarity constraint. |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to ground or reference rail during clamping event; symmetrical with anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for ADAS camera modules and body control units. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) when properly laid out. |
| Low clamping voltage (45.4 V) | Keeps protected 24 V system components (e.g., microcontrollers, gate drivers) below absolute maximum ratings during surge events. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing for high-volume industrial assembly. |
Applications
| Industrial Motor Drives | Automotive Camera Modules |
|---|---|
Use Scenario: Protection of gate driver inputs and feedback sensing lines against switching-induced transients in 24 V BLDC motor controllers. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector interface and IC input pins to clamp spikes before they reach sensitive analog comparators or logic gates. Use Value: Prevents latch-up or permanent damage to isolated gate drivers (e.g., Si823x) during MOSFET turn-off, maintaining functional safety integrity. | Use Scenario: Surge suppression on FAKRA or mini-FARAK coaxial video lines connecting rear-view cameras to infotainment ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed inline with differential video pair to absorb ESD (IEC 61000-4-2 ±15 kV contact) and load dump energy without distorting signal integrity. Use Value: Maintains <1 pF junction capacitance at zero bias (per Fig. 4), preserving >100 MHz video bandwidth while meeting ISO 10605 and ISO 7637-2 requirements. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
Use Scenario: Input-stage protection for 48 V PoE-powered remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC/DC converters, coordinated with secondary MOV-based front-end filtering. Use Value: Limits let-through voltage to <50 V during 10/1000 µs surges, preventing overvoltage shutdown of buck controllers (e.g., LM5017) and ensuring uninterrupted RF operation. | Use Scenario: Protection of 4–20 mA current loop transmitters and analog front-ends in hazardous-area pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 28 V) TVS placed across loop terminals to shunt induced transients while preserving milliamp-level accuracy. Use Value: Ensures <0.1 % full-scale error contribution from leakage current, meeting SIL-2 functional safety requirements for process automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; differs only in material composition (HM3 vs HE3). | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy (e.g., EU auto Tier 1). | Choose SMBJ28CA-M3/52 if halogen-free materials are required; otherwise SMBJ28CAHE3_B/H offers same performance with standard RoHS compliance. |
| SMCJ28CAHE3_A/H | Same VWM, VBR, VC, but in larger SMC (DO-214AB) package; higher PPPM = 1500 W; RθJA = 50 °C/W; 2× footprint area. | Used where higher surge endurance or lower thermal resistance is needed - e.g., primary-side AC/DC input protection or high-reliability telecom rectifiers. | Choose SMCJ28CAHE3_A/H only when 600 W is insufficient or board space allows larger package; SMBJ28CAHE3_B/H remains optimal for space-constrained 24 V DC distribution nodes. |
Compared with SMBJ28CA-M3/52, SMBJ28CAHE3_B/H shares identical clamping performance and automotive qualification but uses standard RoHS-compliant molding compound instead of halogen-free. Against SMCJ28CAHE3_A/H, it trades 2.5× peak power for 40 % smaller PCB area and tighter layout integration near ICs and connectors.
Availability
SMBJ28CAHE3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive camera modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply across long-life production programs.
Supply support for SMBJ28CAHE3_B/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed for high-efficiency, surface-mount transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems needing AEC-Q101 validation and consistent clamping performance.
FAQ
What is the clamping voltage of SMBJ28CAHE3_B/H at its rated peak pulse current?
The SMBJ28CAHE3_B/H has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 13.2 A, measured using the standardized 10/1000 µs double-exponential waveform. This value ensures that protected circuitry - such as 24 V-rated microcontrollers or gate drivers - remains within safe operating voltage limits during surge events. The SMBJ28CAHE3_B/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBJ28CAHE3_B/H suitable for automotive applications?
Yes, SMBJ28CAHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use in Vishay's ordering nomenclature (HE3 suffix denotes RoHS-compliant + AEC-Q101 qualification). It is deployed in ADAS camera modules, body control units, and infotainment power rails where robust ESD and surge immunity are required. The SMBJ28CAHE3_B/H undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and mechanical shock per AEC-Q101 standards.
How does the bidirectional nature of SMBJ28CAHE3_B/H affect its placement in circuit design?
The SMBJ28CAHE3_B/H has no polarity marking and functions identically in both directions, making it ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or floating power domains where voltage polarity reversal may occur. Unlike unidirectional TVS diodes, the SMBJ28CAHE3_B/H eliminates orientation errors during automated placement and avoids the need for dual-diode configurations. Its symmetrical I-V curve ensures matched clamping thresholds regardless of surge direction.
What is the thermal resistance of SMBJ28CAHE3_B/H, and how does it impact PCB layout?
The SMBJ28CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in the Vishay datasheet. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves surge survivability. For repeated surge events, designers must ensure average power dissipation stays below 5.0 W (PD) by verifying duty cycle and ambient temperature per Fig. 2 derating curves.
Does SMBJ28CAHE3_B/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ28CAHE3_B/H meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C for lead-free soldering. This means the device has unlimited floor life and can be placed directly into reflow ovens without pre-baking - significantly simplifying SMT assembly for high-volume industrial and automotive production. The SMBJ28CAHE3_B/H also passes JESD201 Class 2 whisker testing and complies with J-STD-002 solderability standards.
SMBJ28CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBJ28CAHE3_B/H FAQ
1.How can I place an order for SMBJ28CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CAHE3_B/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 SMBJ28CAHE3_B/H reliable?
The price and inventory of SMBJ28CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ28CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CAHE3_B/H?
SMBJ28CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CAHE3_B/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 SMBJ28CAHE3_B/H?
For technical support, including SMBJ28CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ28CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ28CAHE3_B/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 SMBJ28CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ28CAHE3_B/H?
All SMBJ28CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CAHE3_B/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 SMBJ28CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ28CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CAHE3_B/H Tags
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