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Vishay General Semiconductor - Diodes Division SMA5J22CAHM3_A/H
- Part No.:
- SMA5J22CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22CAHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,757
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Product details
Overview
SMA5J22CAHM3_A/H 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 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), clamping voltage of 35.5 V at 14.1 A IPPM, and operates from –55 °C to +150 °C - used in automotive sensor interface protection.
For engineers reviewing the SMA5J22CAHM3_A/H datasheet, SMA5J22CAHM3_A/H pinout, SMA5J22CAHM3_A/H application, or SMA5J22CAHM3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low clamping ratio (VC/VBR ≈ 1.42). Its bidirectional architecture enables symmetrical suppression of positive and negative transients without polarity sensitivity, making it suitable for AC-coupled or floating signal paths.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), has matte tin-plated leads solderable per J-STD-002, and is halogen-free and RoHS-compliant. The HM3 suffix confirms AEC-Q101 qualification, targeting automotive-grade reliability in engine control, ADAS sensor interfaces, and infotainment power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - guaranteed breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 35.5 V at 14.1 A - clamping voltage under 10/1000 μs surge; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 500 W - peak pulse power handling capacity; supports robust protection against load dump and inductive switching surges. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments with minimal derating. |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs PCB copper area requirements for thermal management. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both terminals identical) | Transient current path | Either terminal serves as input/output for bidirectional clamping; no cathode band marking required. |
| Case (body) | Thermal conduction path | Plastic body transfers heat to PCB copper pads; requires minimum 5.0 mm × 5.0 mm pad area per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and ADAS sensors per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets automotive environmental compliance standards (e.g., ELV, IMDS) without compromising surge performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision for sensitive 3.3 V/5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-related popcorning or delamination risks. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump-induced transients in vehicle cabins and powertrain modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching MCU I/O pins. Use Value: Maintains signal integrity under ISO 10605 (30 kV air/15 kV contact discharge) and ISO 7637-2 Pulse 5a (75 V/100 ms) without latch-up or parametric shift. |
Use Scenario: Safeguarding differential CAN H/L lines in factory automation controllers exposed to motor drive noise and relay switching transients. IC Role / Device Role / Timing Role: Common-mode transient suppressor across CAN bus pair, referenced to chassis ground with low capacitance (typ. <100 pF). Use Value: Prevents bit errors and bus lockup by limiting common-mode voltage excursions to ≤35.5 V while preserving signal rise/fall times. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Secondary-side overvoltage protection on 12–24 V DC outputs of wall adapters and PoE injectors subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage clamp after primary-side isolation, absorbing residual transients that bypass upstream MOVs or gas tubes. Use Value: Delivers 500 W surge rating with sub-1 ns response to protect downstream DC-DC converters and USB-PD controllers. |
Use Scenario: Surge suppression on -48 V DC telecom power feeds entering remote radio units (RRUs) and baseband units (BBUs). IC Role / Device Role / Timing Role: Bidirectional protector across power rail and return, rated for repeated 10/1000 μs surges up to 500 W without degradation. Use Value: Ensures >100,000 surge cycles endurance per Telcordia GR-1089-CORE requirements while maintaining VWM stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22CAHE3_A/H | Same electrical specs and package; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment. | Select when AEC-Q101 is not required and halogen-free material is not mandated by OEM spec. |
| SMA6J22CAHM3_A/H | 600 W PPPM rating (vs. 500 W), same VWM/VBR/VC; larger thermal mass due to SMA6J (DO-214AB) package. | Higher surge margin for severe load-dump scenarios; requires larger PCB footprint (7.11 mm × 6.22 mm vs. 5.28 mm × 4.93 mm). | Choose when system-level surge testing exceeds 500 W or when extended thermal endurance is critical. |
Compared with SMA5J22CAHE3_A/H, the SMA5J22CAHM3_A/H adds halogen-free construction and AEC-Q101 validation without changing clamping behavior; versus SMA6J22CAHM3_A/H, it trades 100 W surge headroom for smaller board area and lower thermal resistance in compact layouts.
Availability
SMA5J22CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom DC power feed applications requiring stable component supply across multi-year production cycles.
Supply support for SMA5J22CAHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade qualification.
The SMA5J series was engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial systems, balancing 500 W surge capability with DO-214AC footprint and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMA5J22CAHM3_A/H at its rated peak pulse current?
The SMA5J22CAHM3_A/H clamps to a maximum of 35.5 V at its specified peak pulse current (IPPM) of 14.1 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by protected circuitry during standardized surge events - critical for ensuring downstream 3.3 V or 5 V logic remains within absolute maximum ratings.
Is SMA5J22CAHM3_A/H suitable for automotive applications?
Yes, SMA5J22CAHM3_A/H is AEC-Q101 qualified (confirmed by HM3 suffix), halogen-free, and rated for –55 °C to +150 °C operation. It is explicitly intended for automotive use cases including engine control modules, ADAS camera sensors, and body electronics where immunity to ISO 7637-2 and ISO 10605 transients is mandatory - verified through temperature cycling, humidity bias, and mechanical shock testing.
How does the bidirectional design of SMA5J22CAHM3_A/H affect its circuit implementation?
The bidirectional design of SMA5J22CAHM3_A/H means both terminals are functionally identical - no cathode marking is present, and it suppresses transients of either polarity symmetrically. This eliminates polarity concerns during layout and allows direct placement across AC-coupled lines, differential buses (e.g., CAN, RS-485), or ungrounded power rails without orientation verification.
What is the thermal resistance of SMA5J22CAHM3_A/H, and how does it impact PCB layout?
SMA5J22CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under full 500 W surge, designers must ensure adequate copper area and avoid excessive trace length between device terminals and thermal planes - undersized pads increase steady-state temperature and reduce surge repetition rate capability.
Does SMA5J22CAHM3_A/H require derating at elevated ambient temperatures?
Yes, SMA5J22CAHM3_A/H must be derated above TA = 25 °C per Figure 2 in Vishay document 88875: peak pulse power decreases linearly to zero at +150 °C junction temperature. At 85 °C ambient, maximum PPPM drops to ~350 W assuming standard pad layout - system-level thermal modeling is recommended for high-temperature enclosures like engine bays or industrial control cabinets.
SMA5J22CAHM3_A/H 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 14.1A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J22CAHM3_A/H FAQ
1.How can I place an order for SMA5J22CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22CAHM3_A/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 SMA5J22CAHM3_A/H reliable?
The price and inventory of SMA5J22CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J22CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22CAHM3_A/H?
SMA5J22CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22CAHM3_A/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 SMA5J22CAHM3_A/H?
For technical support, including SMA5J22CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22CAHM3_A/H requirements.
6.How does Aetrix verify that SMA5J22CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J22CAHM3_A/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 SMA5J22CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J22CAHM3_A/H?
All SMA5J22CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22CAHM3_A/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 SMA5J22CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J22CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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