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Vishay General Semiconductor - Diodes Division SMA5J22CAHM3_A/I
- Part No.:
- SMA5J22CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22CAHM3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,511
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Product details
Overview
SMA5J22CAHM3_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 signal and power lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), and clamps to ≤35.5 V at 14.1 A IPPM under 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J22CAHM3_A/I datasheet, SMA5J22CAHM3_A/I pinout, SMA5J22CAHM3_A/I application, or SMA5J22CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance across repetitive transients.
The device is rated for TJ = –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its thermal resistance (RθJA = 80 °C/W) and RθJL = 25 °C/W are validated on standard 5.0 mm × 5.0 mm copper pads - critical for thermal management in compact automotive ECUs and industrial PLC modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - tight breakdown window ensures predictable turn-on and avoids false triggering in noisy environments. |
| VC @ IPPM | ≤35.5 V at 14.1 A - clamping voltage limits downstream IC stress during 10/1000 µs surges (e.g., ISO 7637-2 Pulse 1/2a/5a). |
| PPPM | 500 W - peak pulse power handling capacity determines survivability against high-energy transients like load dump or ESD. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered sensors. |
| TJ max | +150 °C - enables use in under-hood automotive locations and high-ambient industrial enclosures without derating. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with standard pick-and-place and reflow profiles. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, no polarity marking (bidirectional); terminals solderable per J-STD-002 and JESD 22-B102, whisker-tested per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions - no cathode band marking; connects across protected line and ground or differential pair. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and heat dissipation path via copper pad contact per JEDEC MO-215. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, and CAN FD lines without external polarity management. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A Tier 1 reporting; supports green manufacturing and end-of-life recycling. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow at 260 °C peak - eliminates baking requirements and simplifies SMT line logistics. |
| Low RθJL (25 °C/W) | Enhances thermal coupling to PCB copper, enabling sustained surge handling in confined layouts without heatsinks. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤35.5 V, preventing ADC saturation and latch-up in 3.3 V or 5 V signal chains. |
Use Scenario: Guarding RS-485 transceiver pins (A/B) against ESD and lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential bus, co-located with common-mode choke. Use Value: Maintains signal integrity up to 20 Mbps by clamping without adding capacitance (>100 pF typical at 0 V bias). |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
Use Scenario: Safeguarding USB-C CC and VCONN lines against hot-plug ESD events in portable docking stations. IC Role / Device Role / Timing Role: Low-leakage bidirectional suppressor placed inline with 5 V power and configuration channels. Use Value: Sub-1 µA leakage at 22 V prevents parasitic drain on battery-backed circuits during standby. |
Use Scenario: Front-end surge suppression on POTS/DSL line cards subjected to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Primary protection device between line transformer secondary and codec IC. Use Value: Withstands 500 W surges per ITU-T K.20/K.21, reducing need for secondary GDT or MOV stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; AEC-Q101 qualified (HE3 suffix). | Preferred where halogen content is unrestricted but automotive qualification is required (e.g., non-under-hood modules). | Select SMA5J22CAHE3_A/I when halogen-free material is not mandated by OEM specification. |
| SMA6J22CA-M3/5A | 600 W PPPM rating; same VWM/VBR/VC; larger SMA package variant with higher surge margin. | Suitable for designs requiring extended surge endurance beyond 500 W, such as telecom central office equipment. | Choose SMA6J22CA-M3/5A only if system-level testing confirms need for >500 W pulse handling. |
Compared with SMA5J22CAHM3_A/I, SMA5J22CAHE3_A/I offers identical surge protection with standard RoHS compliance, while SMA6J22CA-M3/5A trades slightly larger footprint for 20 % higher peak power - both require layout review due to non-pin-compatible packaging.
Availability
SMA5J22CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer USB-C port protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMA5J22CAHM3_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, power density, and automotive-grade validation.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained applications - targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-2/4/5, and lightning-induced surges is mandatory.
FAQ
What is the polarity configuration of SMA5J22CAHM3_A/I?
SMA5J22CAHM3_A/I is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking. Its electrical characteristics apply identically in both directions, making it suitable for AC signal lines, differential buses, and ungrounded protection schemes without orientation constraints during placement.
Does SMA5J22CAHM3_A/I meet automotive qualification standards?
Yes, SMA5J22CAHM3_A/I carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. This includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validated for under-hood and chassis-mounted automotive applications.
What is the maximum clamping voltage for SMA5J22CAHM3_A/I at rated surge current?
The maximum clamping voltage (VC) for SMA5J22CAHM3_A/I is 35.5 V at 14.1 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream ICs remain within absolute maximum ratings during surge events.
How does the HM3 suffix differ from HE3 in SMA5J22CAHM3_A/I?
The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 indicates RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both share identical electrical parameters and package dimensions, but HM3 satisfies stricter environmental mandates for certain automotive OEMs and green initiatives.
Can SMA5J22CAHM3_A/I be used in place of a unidirectional TVS like SMA5J22A?
No - SMA5J22CAHM3_A/I is strictly bidirectional and lacks polarity marking, while SMA5J22A is unidirectional with a cathode band. Substituting them requires circuit redesign: SMA5J22CAHM3_A/I protects both polarities simultaneously, whereas SMA5J22A only clamps reverse surges and conducts forward current above VF ≈ 3.5 V.
SMA5J22CAHM3_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):
- 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/I FAQ
1.How can I place an order for SMA5J22CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22CAHM3_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 SMA5J22CAHM3_A/I reliable?
The price and inventory of SMA5J22CAHM3_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 SMA5J22CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J22CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22CAHM3_A/I?
SMA5J22CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22CAHM3_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 SMA5J22CAHM3_A/I?
For technical support, including SMA5J22CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J22CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J22CAHM3_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 SMA5J22CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J22CAHM3_A/I?
All SMA5J22CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22CAHM3_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 SMA5J22CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J22CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J22CAHM3_A/I Tags
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