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Vishay General Semiconductor - Diodes Division SMA5J28CAHE3_A/I
- Part No.:
- SMA5J28CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28CAHE3_A/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J28CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V clamping voltage at 11.0 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform. Used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMA5J28CAHE3_A/I datasheet, SMA5J28CAHE3_A/I pinout, SMA5J28CAHE3_A/I application, or SMA5J28CAHE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), bidirectional polarity confirmation, and exact package dimensions per DO-214AC - all critical for ESD/surge design validation and BOM selection.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with clamping action triggered when reverse or forward voltage exceeds VBR. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ps), enabling effective suppression of lightning-induced transients and inductive switching spikes.
Rated for TJ = –55 °C to +150 °C and qualified to AEC-Q101, the SMA5J28CAHE3_A/I supports automotive under-hood applications. Thermal performance is defined by RθJA = 80 °C/W (on 0.2" × 0.2" Cu pads) and RθJL = 25 °C/W, allowing accurate junction temperature estimation during repetitive surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range on protected line. |
| VBR min/max | 31.1 V / 34.4 V - breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 45.4 V at 11.0 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 500 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without failure. |
| IR @ VWM | <1.0 µA - ultra-low reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - maximum junction temperature rating; supports operation in engine control units and industrial motor drives. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with standard SMT reflow profiles (MSL level 1, 260 °C peak). |
Pinout & Package
Two-terminal device in SMA (DO-214AC) package; no polarity marking for bidirectional types. Terminals are matte tin-plated leads, 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 PPPM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity - enables single-device protection of AC or floating lines. |
| Case (body) | Thermal and mechanical interface | Plastic molded case meets UL 94 V-0; provides mechanical anchoring and contributes to thermal dissipation via PCB copper pad coupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - supports PPAP and long-term reliability requirements. |
| Glass passivated junction | Ensures stable VBR and low IR over temperature and lifetime; eliminates risk of junction corrosion in humid or chemically aggressive environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin for sensitive gate drivers and ADC inputs. |
| MSL level 1 rating | Allows unlimited floor life and compatibility with standard lead-free reflow (peak 260 °C), eliminating bake requirements prior to assembly. |
| Halogen-free option available | HM3 suffix variants meet IPC-4101D/126 and JEDEC J-STD-020 for green manufacturing; HE3 variant (like SMA5J28CAHE3_A/I) is RoHS-compliant but not halogen-free. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in junction boxes and battery management modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting voltage excursion to ≤45.4 V during 10/1000 µs surges up to 500 W. Use Value: Prevents latch-up or permanent damage to PMICs and CAN transceivers exposed to ISO 16750-2 pulses without requiring series impedance. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing ESD (IEC 61000-4-2 ±15 kV) and burst noise (IEC 61000-4-4) on low-current signal paths. Use Value: Maintains signal integrity with <1.0 µA leakage at 28 V, avoiding offset errors in precision measurement circuits. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras, access points) connected to 48 V DC distribution infrastructure. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at DC input stage to suppress induced surges from nearby lightning strikes or cable coupling. Use Value: Withstands repeated 500 W surges while maintaining VWM = 28 V headroom above nominal 48 V rail (derated for ripple), ensuring robust field longevity. |
Use Scenario: Protecting microcontroller GPIOs and half-bridge gate drivers in smart washing machines and HVAC blower modules. IC Role / Device Role / Timing Role: Transient suppressor across motor phase terminals and MCU supply pins to absorb back-EMF spikes during commutation. Use Value: Enables compact layout with DO-214AC footprint and eliminates need for external RC snubbers in cost-sensitive white goods designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28CAHM3_A/I | Identical electrical specs and AEC-Q101 qualification, but halogen-free molding compound and terminations. | Required where IPC-4101D/126 compliance or halogen-free BOMs are mandated (e.g., EU public infrastructure projects). | Select SMA5J28CAHM3_A/I if halogen-free certification is contractually required; otherwise SMA5J28CAHE3_A/I offers same protection at lower cost. |
| SMCJ28CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (50 °C/W vs. 80 °C/W) and 1500 W PPPM rating. | Suitable for higher-energy threats (e.g., IEC 61000-4-5 6 kV/12 Ω) where board space allows and thermal budget permits. | Choose SMCJ28CAHE3_A/I only when 500 W is insufficient and layout accommodates 7.11 mm × 6.22 mm footprint; SMA5J28CAHE3_A/I remains optimal for space-constrained automotive modules. |
Compared with SMA5J28CAHE3_A/I, SMA5J28CAHM3_A/I delivers identical surge performance with halogen-free compliance, while SMCJ28CAHE3_A/I trades smaller size for higher power handling - making SMA5J28CAHE3_A/I the preferred choice for AEC-Q101-compliant, space-limited 500 W protection.
Availability
SMA5J28CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom power feeds requiring stable component supply, AEC-Q101 qualification, and RoHS compliance.
Supply support for SMA5J28CAHE3_A/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 and automotive-grade qualification.
The SMA5JxxCA family targets high-density, high-reliability transient suppression in automotive and industrial environments - engineered for AEC-Q101 compliance, low-profile mounting, and consistent clamping under repetitive surge stress.
FAQ
What does the "CA" suffix mean in SMA5J28CAHE3_A/I?
The "CA" suffix in SMA5J28CAHE3_A/I denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities, unlike unidirectional "A" variants. This makes SMA5J28CAHE3_A/I ideal for protecting AC-coupled lines, floating sensors, or differential buses where polarity reversal may occur during surge events.
Is SMA5J28CAHE3_A/I qualified for automotive use?
Yes, SMA5J28CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix indicates RoHS-compliant and AEC-Q101 qualified). It is rated for TJ = –55 °C to +150 °C and tested per stress conditions relevant to engine control, body electronics, and ADAS subsystems.
What is the clamping voltage of SMA5J28CAHE3_A/I at its rated peak pulse current?
The clamping voltage (VC) of SMA5J28CAHE3_A/I is 45.4 V at 11.0 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the maximum voltage seen by downstream components during a standardized surge event and is critical for ensuring safe operating margins of protected ICs.
Does SMA5J28CAHE3_A/I have polarity markings on the package?
No, SMA5J28CAHE3_A/I has no polarity markings because it is a bidirectional TVS diode. The SMA (DO-214AC) package is symmetrical, and either end functions identically - eliminating orientation concerns during automated placement and simplifying PCB layout for AC or differential signal protection.
How does the thermal resistance of SMA5J28CAHE3_A/I affect its surge capability?
SMA5J28CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads. This value directly limits permissible duty cycle under repetitive surges; exceeding thermal limits risks parametric shift or failure. For high-frequency transients, derating per Figure 2 in the datasheet is mandatory.
SMA5J28CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 11A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J28CAHE3_A/I FAQ
1.How can I place an order for SMA5J28CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28CAHE3_A/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 SMA5J28CAHE3_A/I reliable?
The price and inventory of SMA5J28CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J28CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28CAHE3_A/I?
SMA5J28CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28CAHE3_A/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 SMA5J28CAHE3_A/I?
For technical support, including SMA5J28CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28CAHE3_A/I requirements.
6.How does Aetrix verify that SMA5J28CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J28CAHE3_A/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 SMA5J28CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J28CAHE3_A/I?
All SMA5J28CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28CAHE3_A/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 SMA5J28CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMA5J28CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J28CAHE3_A/I Tags
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