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Vishay General Semiconductor - Diodes Division SMA5J28CAHE3/5A
- Part No.:
- SMA5J28CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28CAHE3/5A.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J28CAHE3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 28 V standoff voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), 11.0 A peak pulse current (IPPM), and clamps to ≤45.4 V at rated surge. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J28CAHE3/5A datasheet, SMA5J28CAHE3/5A pinout, SMA5J28CAHE3/5A application, or SMA5J28CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, 500 W surge rating with low clamping voltage, AEC-Q101 qualification status, RoHS-compliant HE3 suffix, and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping performance without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ns), while low incremental surge resistance minimizes voltage overshoot during transient events.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its thermal resistance (RθJA) is 80 °C/W on standard PCB pads, supporting reliable power dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum reverse stand-off voltage before conduction begins; defines safe operating range for normal circuit conditions. |
| VBR (min/max) | 31.1 V / 34.4 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold under surge. |
| VC @ IPPM | ≤45.4 V - Clamping voltage at 11.0 A peak pulse current; limits downstream voltage stress during 10/1000 µs transients. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs waveform); supports robust protection against lightning-induced and inductive-switching surges. |
| IPPM | 11.0 A - Peak pulse current capacity at rated waveform; determines maximum surge energy the device can absorb without failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch; compatible with standard SMT pick-and-place and reflow processes. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No defined anode/cathode; terminals are electrically identical; connects across protected line and ground or between differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to downstream ICs-critical for protecting 3.3 V or 5 V logic interfaces adjacent to 24 V systems. |
| MSL Level 1 rating | Supports unlimited floor life and single-reflow processing at 260 °C peak, eliminating moisture sensitivity handling constraints in production. |
| Glass-passivated junction | Provides stable leakage performance (<1.0 µA at VWM) and long-term reliability under thermal cycling and humidity stress. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp ±100 V transients within 1 ns. Use Value: Maintains signal integrity below 45.4 V clamping level, preventing damage to 12-bit ADC inputs and ensuring ASIL-B functional safety compliance. |
Use Scenario: Safeguarding 24 V digital input channels on PLC modules exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 500 W surges on field wiring without degradation over >100,000 cycles. Use Value: Eliminates need for external series impedance or RC filtering due to low dynamic impedance (<1 Ω), preserving fast edge response of 10 kHz digital signals. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Transient suppression on POTS line interface circuits in VoIP gateways subjected to lightning-induced surges per ITU-T K.20. IC Role / Device Role / Timing Role: Primary protection device bridging tip/ring lines to ground, coordinated with secondary GDT or MOV stages. Use Value: Withstands 10/1000 µs surges up to 11 A while maintaining <1 µA leakage at 28 V, avoiding false triggering in low-power standby modes. |
Use Scenario: Secondary-side surge protection on 5 V/12 V outputs of wall adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Low-capacitance (CJ < 100 pF) bidirectional clamp placed after DC-DC converter to protect USB and Ethernet PHYs. Use Value: Prevents latch-up in 3.3 V USB transceivers during ESD contact discharge (IEC 61000-4-2 ±8 kV) without signal distortion or bandwidth loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ28CA | Same 28 V VWM, 500 W rating, but not AEC-Q101 qualified; higher VC (48.4 V) and lower IPPM (10.3 A). | Approved for commercial/industrial use only; unsuitable for automotive under-hood deployment requiring AEC-Q101 validation. | Select SMA5J28CAHE3/5A when automotive qualification, tighter clamping, or extended temperature margin is required. |
| ON Semiconductor 1.5SMC27CA | Higher VWM (27 V), same 500 W rating, but larger SMC (DO-214AB) package (7.11 mm width vs. 4.93 mm); not AEC-Q101 qualified. | Requires larger PCB footprint and different pad layout; lacks automotive qualification and MSL Level 1 reflow rating. | Choose SMA5J28CAHE3/5A for space-constrained designs, automotive programs, or where MSL Level 1 process compatibility is mandatory. |
Compared with SMAJ28CA and 1.5SMC27CA, SMA5J28CAHE3/5A delivers superior automotive readiness, tighter clamping (45.4 V vs. ≥48.4 V), and smaller SMA footprint-enabling direct replacement in AEC-Q101-compliant designs without layout revision or derating.
Availability
SMA5J28CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply, AEC-Q101 traceability, and long-lifecycle support.
Supply support for SMA5J28CAHE3/5A 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, power density, and automotive-grade qualification.
The SMA5J family is engineered for high-power-density transient suppression in space-constrained, high-reliability applications-including automotive, industrial automation, and communications infrastructure-where low clamping voltage and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of the SMA5J28CAHE3/5A at its rated peak pulse current?
The SMA5J28CAHE3/5A clamps to a maximum of 45.4 V at its rated peak pulse current of 11.0 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and confirmed in the Vishay datasheet revision 09-Jan-2024. The clamping voltage directly limits the maximum stress imposed on downstream components during surge events, making it a critical parameter for system-level protection design. SMA5J28CAHE3/5A maintains this performance across its full operating temperature range.
Is the SMA5J28CAHE3/5A suitable for automotive applications?
Yes, the SMA5J28CAHE3/5A is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. It is specifically designed for automotive environments, supporting junction temperatures from –55 °C to +150 °C and passing all stress tests required for automotive-grade discrete components. Applications include engine control units, ADAS camera modules, and body electronics where transient immunity to ISO 7637-2 pulses is mandatory. SMA5J28CAHE3/5A meets these requirements without derating.
What does the "CA" suffix mean in SMA5J28CAHE3/5A?
The "CA" suffix in SMA5J28CAHE3/5A denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SMA5J28A), it has no cathode marking and functions identically regardless of voltage polarity applied across its terminals. This makes SMA5J28CAHE3/5A ideal for AC-coupled lines, differential buses, and floating power domains where polarity reversal may occur.
What is the maximum reverse leakage current of the SMA5J28CAHE3/5A at its standoff voltage?
The SMA5J28CAHE3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 28 V standoff voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss and avoids false triggering in high-impedance sensing circuits. The value is specified in the Vishay electrical characteristics table and remains stable across temperature due to the device's glass-passivated junction construction. SMA5J28CAHE3/5A maintains this performance throughout its rated operating range.
Does the SMA5J28CAHE3/5A require special PCB layout considerations?
Yes-the SMA5J28CAHE3/5A should be mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 500 W pulse power dissipation. Smaller pads increase thermal resistance and reduce surge capability. Trace inductance must also be minimized: keep connections short and wide, especially between the TVS and protected node/ground. SMA5J28CAHE3/5A does not require series impedance or filtering for basic operation, but coordination with upstream filters may be needed for multi-stage protection.
SMA5J28CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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:
- 45.4V
- 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)
SMA5J28CAHE3/5A FAQ
1.How can I place an order for SMA5J28CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28CAHE3/5A 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 SMA5J28CAHE3/5A reliable?
The price and inventory of SMA5J28CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J28CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28CAHE3/5A?
SMA5J28CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28CAHE3/5A 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 SMA5J28CAHE3/5A?
For technical support, including SMA5J28CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J28CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J28CAHE3/5A 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 SMA5J28CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J28CAHE3/5A?
All SMA5J28CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28CAHE3/5A, 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 SMA5J28CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J28CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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