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Vishay General Semiconductor - Diodes Division SMA5J22HE3/5A
- Part No.:
- SMA5J22HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22HE3/5A.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,377
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Product details
Overview
SMA5J22HE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on power and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 35.5 V clamping voltage (VC) at 14.1 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J22HE3/5A datasheet, SMA5J22HE3/5A pinout, SMA5J22HE3/5A application, or SMA5J22HE3/5A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant HE3 suffix, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 22 V), but conducts heavily when transient voltage exceeds its breakdown threshold, diverting surge current away from downstream components. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
The device is rated for non-repetitive 10/1000 µs surges up to 500 W, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation in compact layouts where heat dissipation is constrained - especially critical in AEC-Q101-qualified automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - precise breakdown threshold defining clamping onset |
| VC @ IPPM | 35.5 V at 14.1 A - clamped voltage during full 500 W surge, limiting stress on protected ICs |
| PPPM | 500 W - peak pulse power handling capability with standard 10/1000 µs waveform |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and lifetime performance |
| Package | DO-214AC (SMA) - surface-mount, low-profile package compatible with J-STD-020 MSL Level 1 |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode band marking on unidirectional devices; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker test (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (during surge conduction) | Connected to protected circuit's ground or low-side return path |
| Cathode (banded end) | Reverse-biased terminal during normal operation | Connected to line being protected (e.g., 24 V rail or sensor input) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units and body electronics |
| Low incremental surge resistance | Enables tighter clamping (35.5 V at 14.1 A), reducing voltage overshoot on sensitive loads |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning, simplifying manufacturing flow |
| RoHS-compliant HE3 suffix | Meets global environmental regulations and includes JESD 201 Class 2 whisker mitigation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to downstream regulators and microcontrollers rated for 36 V absolute max. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure or temperature transducers) connected to PLC analog inputs. IC Role / Device Role / Timing Role: Line-side TVS on 4–20 mA or 0–10 V signal paths exposed to ESD and field wiring surges. Use Value: Clamps fast transients within nanoseconds while adding <1 pF capacitance, preserving signal integrity and ADC accuracy. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Protection |
Use Scenario: Secondary-side surge suppression on 12–24 V outputs of wall adapters powering routers or set-top boxes. IC Role / Device Role / Timing Role: Final-stage TVS before connector or USB-PD interface IC. Use Value: Absorbs repetitive 500 W surges per IEC 61000-4-5, extending product lifetime in ungrounded AC environments. | Use Scenario: DC power feed lines (e.g., -48 V) in telecom base stations subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection element upstream of DC-DC converters and monitoring circuits. Use Value: Withstands 14.1 A peak current and maintains clamping below -42 V, ensuring uninterrupted operation during outdoor grid events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22A-E3/5A | Commercial-grade (non-AEC-Q101), same electrical specs and DO-214AC package | Lacks automotive qualification; suitable for consumer/industrial only | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMCJ22A | Higher 1500 W PPPM, larger DO-214AB (SMC) package, same VWM/VC ratings | Used where higher surge margin or board-level robustness is needed, e.g., mains-connected equipment | Choose when system-level surge testing requires >500 W headroom or thermal mass supports larger footprint |
Compared with SMA5J22A-E3/5A, the SMA5J22HE3/5A adds AEC-Q101 validation and JESD 201 Class 2 whisker resistance - essential for automotive deployment. Against SMCJ22A, it trades surge capacity for smaller size and lower thermal resistance, favoring space-constrained PCBs where 500 W suffices.
Availability
SMA5J22HE3/5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC feeder protection requiring stable component supply across production lifecycles.
Supply support for SMA5J22HE3/5A 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, TVS, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems needing AEC-Q101-qualified, surface-mount TVS solutions.
FAQ
What is the clamping voltage of the SMA5J22HE3/5A under full-rated surge conditions?
The SMA5J22HE3/5A has a maximum clamping voltage (VC) of 35.5 V at 14.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during a 500 W transient event. The SMA5J22HE3/5A maintains this clamping performance across its specified operating temperature range and is validated per AEC-Q101 stress tests.
Is the SMA5J22HE3/5A suitable for automotive applications?
Yes, the SMA5J22HE3/5A is AEC-Q101 qualified and carries the HE3 suffix indicating compliance with JESD 201 Class 2 whisker testing and RoHS requirements. Its 150 °C maximum junction temperature, glass-passivated junction, and DO-214AC package with MSL Level 1 rating make it suitable for under-hood and body-control module applications. The SMA5J22HE3/5A is explicitly listed in Vishay's automotive-grade TVS portfolio for load-dump and ISO 7637-2 protection.
How does the HE3 suffix differ from the E3 suffix in SMA5J22HE3/5A?
The HE3 suffix in SMA5J22HE3/5A denotes AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas E3 indicates commercial-grade RoHS compliance only. Both share identical electrical parameters and DO-214AC packaging, but SMA5J22HE3/5A undergoes additional stress testing for automotive reliability - including temperature cycling, humidity bias, and accelerated life testing. The SMA5J22HE3/5A is intended for mission-critical automotive deployments where long-term stability is mandatory.
What is the recommended PCB pad layout for optimal thermal performance of the SMA5J22HE3/5A?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of the SMA5J22HE3/5A to achieve rated 500 W pulse power and thermal resistance of 80 °C/W. These pads must be directly connected to internal ground/power planes via multiple thermal vias. The SMA5J22HE3/5A datasheet Figure 2 shows derating curves confirming that reduced pad area significantly lowers surge capability - using less than the recommended layout may cause premature failure during repeated transients.
Does the SMA5J22HE3/5A have polarity marking, and how is it identified?
Yes, the SMA5J22HE3/5A is unidirectional and features a visible cathode band (dark stripe) on the DO-214AC package body, located near the cathode terminal. This marking aligns with JEDEC standards and must be oriented toward the line being protected (e.g., 24 V rail), while the anode connects to ground or return. No marking appears on bi-directional variants (e.g., SMA5J22CA), but the SMA5J22HE3/5A always includes the band - critical for correct placement during automated assembly and functional verification.
SMA5J22HE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 12.7A
- 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)
SMA5J22HE3/5A FAQ
1.How can I place an order for SMA5J22HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22HE3/5A 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 SMA5J22HE3/5A reliable?
The price and inventory of SMA5J22HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22HE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J22HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22HE3/5A?
SMA5J22HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22HE3/5A 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 SMA5J22HE3/5A?
For technical support, including SMA5J22HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22HE3/5A requirements.
6.How does Aetrix verify that SMA5J22HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J22HE3/5A 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 SMA5J22HE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J22HE3/5A?
All SMA5J22HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22HE3/5A, 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 SMA5J22HE3/5A part is unused and in its original packaging.
Return procedure for SMA5J22HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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