My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ28CAHE3/52
;;2.jpg)
- Part No.:
- SMBJ28CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CAHE3/52.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,322
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ28CAHE3/52 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 a 28 V standoff 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in industrial sensor protection and telecom interface surge suppression.
For engineers reviewing the SMBJ28CAHE3/52 datasheet, SMBJ28CAHE3/52 pinout, SMBJ28CAHE3/52 application, or SMBJ28CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B for protector classification.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding VWM (28 V), it avalanches symmetrically in both directions to limit voltage across protected circuitry to ≤45.4 V. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM).
Designed for automated SMT assembly, SMBJ28CAHE3/52 uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and delivers 600 W pulse power handling with 0.01% duty cycle repetition rate under standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 31.1 V / 34.4 V at IT = 1 mA - Confirmed bidirectional breakdown threshold range |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 10/1000 µs surge, defining worst-case stress on downstream ICs |
| PPPM | 600 W - Peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | ≤1.0 µA - Reverse leakage current level ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
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), with 1.52 mm lead spacing and matte tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive overvoltage events; symmetrical with cathode due to bidirectional structure |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative overvoltage events; functionally identical to anode in CA-type devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated reliability for automotive electronics including infotainment and body control modules |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 Ω source impedance) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT production flow |
Applications
| Industrial Sensor Interfaces | Telecom Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector entry point to clamp transients before reaching ADC input or isolation barrier. Use Value: Limits induced spikes to ≤45.4 V, preventing ADC saturation and maintaining measurement accuracy under 1 kV EFT bursts. |
Use Scenario: Surge protection on RS-485 differential pairs in base station remote radio units subjected to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamping element across A/B lines, referenced to local ground plane with low-inductance layout. Use Value: Absorbs 600 W pulses without failure, preserving signal integrity during 10/1000 µs surges up to ±4 kV per IEC 61000-4-5. |
| Automotive Body Control Modules | Consumer Power Adapter Inputs |
Use Scenario: Input rail protection for LIN bus transceivers and LED drivers in door module ECUs connected to battery-supplied harnesses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply line, coordinated with upstream fuse and downstream LDO. Use Value: AEC-Q101 qualification ensures survival through load dump (ISO 7637-2 Pulse 5a) and jump-start events up to 35 V. |
Use Scenario: Secondary-side transient suppression on 5 V/9 V USB-C PD adapter outputs feeding sensitive SoCs in smart speakers. IC Role / Device Role / Timing Role: Final-stage TVS placed immediately before connector to suppress coupling from nearby switching noise or hot-plug transients. Use Value: Sub-1 µA leakage at 28 V standoff prevents standby current increase, supporting Energy Star Level VI efficiency requirements. |
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 | No difference in circuit performance or layout; selected where halogen-free material compliance is mandated | Choose SMBJ28CA-M3/52 when environmental compliance requires halogen-free packaging without sacrificing reliability |
| SMAJ28CAHE3/A | Lower 400 W PPPM rating; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Reduced surge margin and lower thermal dissipation limit suitability for space-constrained consumer designs with lower threat levels | Choose SMAJ28CAHE3/A only if board area is critical and surge exposure is limited to IEC 61000-4-2 Level 3 (8 kV contact) |
Compared with SMBJ28CAHE3/52, the M3 variant offers identical protection performance with halogen-free construction, while the SMAJ28CAHE3/A trades 33 % lower pulse power and poorer thermal performance for 30 % smaller PCB area-making SMBJ28CAHE3/52 the preferred choice for industrial and automotive applications demanding full 600 W robustness.
Availability
SMBJ28CAHE3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge immunity.
Supply support for SMBJ28CAHE3/52 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 TVS devices with emphasis on reliability, power handling, and automotive-grade qualification.
The SMBJ series targets high-energy transient suppression in harsh environments, with design focus on industrial automation, automotive electronics, and telecom infrastructure where consistent clamping performance and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ28CAHE3/52 under a 10/1000 µs surge?
The SMBJ28CAHE3/52 has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ28CAHE3/52 maintains this clamping performance across its rated junction temperature range of –55 °C to +150 °C.
Is SMBJ28CAHE3/52 suitable for automotive applications?
Yes, SMBJ28CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HE3. It meets requirements for temperature cycling, humidity testing, and mechanical shock relevant to body control modules, infotainment systems, and lighting drivers. Its 28 V standoff and 45.4 V clamping support protection against load dump (ISO 7637-2 Pulse 5a) and jump-start transients in 12 V vehicle networks.
How does the bidirectional configuration of SMBJ28CAHE3/52 affect circuit placement?
The SMBJ28CAHE3/52 has no polarity marking and conducts symmetrically in both directions, allowing direct placement across floating or AC-coupled signal lines-such as RS-485 differential pairs or transformer-isolated interfaces-without orientation constraints. Unlike unidirectional TVS diodes, SMBJ28CAHE3/52 eliminates risk of incorrect installation and simplifies layout by removing the need for cathode alignment checks during automated assembly.
What is the thermal resistance of SMBJ28CAHE3/52, and how does it impact PCB layout?
The SMBJ28CAHE3/52 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. To maintain safe junction temperatures under repetitive surge conditions, designers must provide adequate copper area and avoid excessive trace length between the SMBJ28CAHE3/52 and ground planes. Reducing pad size or using thinner copper increases RθJA and risks thermal runaway during high-duty-cycle transients.
Does SMBJ28CAHE3/52 meet UL safety certification requirements?
Yes, SMBJ28CAHE3/52 carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for protector classification, with file number E136766. This certification confirms compliance for use in primary and secondary circuits of telecommunications and data equipment, including surge protective devices installed on telephone lines, Ethernet ports, and other low-voltage communication interfaces.
SMBJ28CAHE3/52 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)
SMBJ28CAHE3/52 FAQ
1.How can I place an order for SMBJ28CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CAHE3/52 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 SMBJ28CAHE3/52 reliable?
The price and inventory of SMBJ28CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ28CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CAHE3/52?
SMBJ28CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CAHE3/52 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 SMBJ28CAHE3/52?
For technical support, including SMBJ28CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ28CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ28CAHE3/52 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 SMBJ28CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ28CAHE3/52?
All SMBJ28CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CAHE3/52, 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 SMBJ28CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ28CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CAHE3/52 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 …
