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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHM3/H
- Part No.:
- SMAJ5.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHM3/H.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,093
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Product details
Overview
SMAJ5.0CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown range (VBR), 400 W peak pulse power (10/1000 μs), ≤10.5 V clamping voltage at 43.5 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMAJ5.0CAHM3/H datasheet, SMAJ5.0CAHM3/H pinout, SMAJ5.0CAHM3/H application, or SMAJ5.0CAHM3/H equivalent, this device is selected for high-reliability overvoltage protection where low clamping, fast response (<1 ns), and halogen-free RoHS compliance are required - especially in automotive sensor interfaces, industrial I/O, and telecom line protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (6.40 V / 7.25 V at 10 mA), ID ≤800 μA at VWM = 5.0 V, and VC = 10.5 V at IPPM = 43.5 A. Its junction-to-lead thermal resistance is 30 °C/W, enabling effective surge energy dissipation without external heatsinking under standard PCB pad layout.
The device complies with AEC-Q101 stress testing and meets UL 497B recognition (QVGQ2). Its glass-passivated junction ensures stable leakage and long-term reliability, while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin. |
| VBR (min/max) | 6.40 V / 7.25 V at 10 mA - Ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC @ IPPM | 10.5 V at 43.5 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 400 W - Peak surge power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) transients. |
| ID @ VWM | ≤800 μA - Low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount footprint (4.93 mm × 3.99 mm) compatible with automated assembly and IPC-7351 standards. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A (symmetrical) | One end of the bidirectional avalanche junction; connects to protected line or ground reference point. |
| Cathode | Terminal K (symmetrical) | Other end of the bidirectional avalanche junction; functionally identical to Anode in CA devices; no marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and automotive OEM material declarations. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients, protecting 5 V logic and analog front-ends more effectively than higher-ratio TVS devices. |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without preconditioning or baking, reducing manufacturing complexity. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤10.5 V, preventing latch-up or damage to 5 V tolerant MCU GPIOs and transceivers. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring surges and electrostatic discharge in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC input lines prior to optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 400 W surges without degradation, ensuring long-term immunity to repetitive switching transients. |
| Telecom Line Interface | Consumer USB/UART Port Protection |
|
Use Scenario: Shielding RS-485/RS-232 transceiver pins in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary protection layer after gas discharge tube (GDT), clamping residual energy before IC input. Use Value: Fast <1 ns response captures high-frequency surge components missed by slower primary protectors. |
Use Scenario: ESD protection for USB 2.0 D+/D− and UART TX/RX lines in smart home hubs and portable diagnostics tools. IC Role / Device Role / Timing Role: IEC 61000-4-2 Level 4 (±15 kV contact) protection device placed directly at connector entry point. Use Value: Sub-100 pF junction capacitance avoids signal integrity loss on 480 Mbps USB data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CAHE3/H | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant without halogen-free designation. | No difference in automotive or industrial use; differs only in material compliance reporting. | Select SMAJ5.0CAHE3/H if halogen-free certification is not required by your supply chain policy. |
| SMBJ5.0CAHM3/H | Same VWM/VBR/VC ratings, but SMB (DO-214AA) package - 25 % larger footprint and 600 W PPPM rating. | Higher power handling suits systems with stronger surge threats (e.g., outdoor telecom); requires PCB layout change. | Choose SMBJ5.0CAHM3/H only when 600 W surge margin is needed and board space allows larger package. |
Compared with SMAJ5.0CAHM3/H, SMAJ5.0CAHE3/H offers identical performance with standard RoHS compliance, while SMBJ5.0CAHM3/H trades compact size for higher surge capacity - making SMAJ5.0CAHM3/H optimal for space-constrained AEC-Q101 designs needing precise 400 W protection.
Availability
SMAJ5.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ5.0CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMAJ series was developed for surface-mount transient suppression in high-volume automotive and industrial systems, prioritizing low clamping, AEC-Q101 compliance, and compatibility with automated assembly processes.
FAQ
What does the "CA" suffix indicate in SMAJ5.0CAHM3/H?
The "CA" suffix denotes a bidirectional configuration: SMAJ5.0CAHM3/H provides symmetrical clamping for both positive and negative transients, unlike unidirectional "A" variants. This eliminates polarity concerns during placement and enables protection of AC-coupled or floating signal paths without external circuitry.
Is SMAJ5.0CAHM3/H suitable for IEC 61000-4-5 surge testing?
Yes - SMAJ5.0CAHM3/H delivers 400 W peak pulse power with a 10/1000 μs waveform, supporting IEC 61000-4-5 Level 4 (4 kV open-circuit, 2 Ω source impedance) when mounted per recommended 0.2″ × 0.2″ copper pads. Its 10.5 V clamping voltage ensures downstream 5 V ICs remain within safe operating limits.
How does the HM3 suffix affect compliance and reliability of SMAJ5.0CAHM3/H?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance. It also confirms AEC-Q101 qualification - critical for automotive applications where long-term reliability under thermal cycling and humidity is mandatory.
What is the maximum allowable junction temperature for SMAJ5.0CAHM3/H during surge events?
SMAJ5.0CAHM3/H has a maximum junction temperature (TJ max.) of +150 °C, verified per AEC-Q101 test conditions. During repetitive surges, derating per Figure 2 in the datasheet applies - at 100 °C ambient, the device retains ~65 % of its 400 W rating, ensuring safe operation in engine control units and industrial drives.
Can SMAJ5.0CAHM3/H replace SMAJ5.0A in an existing design?
No - SMAJ5.0CAHM3/H is bidirectional while SMAJ5.0A is unidirectional. Replacing SMAJ5.0A with SMAJ5.0CAHM3/H may cause unintended conduction in DC-biased circuits due to lack of cathode/anode polarity marking. Use only where bidirectional clamping is explicitly required and circuit topology supports symmetrical protection.
SMAJ5.0CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ5.0CAHM3/H FAQ
1.How can I place an order for SMAJ5.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHM3/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 SMAJ5.0CAHM3/H reliable?
The price and inventory of SMAJ5.0CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHM3/H?
SMAJ5.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHM3/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 SMAJ5.0CAHM3/H?
For technical support, including SMAJ5.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHM3/H requirements.
6.How does Aetrix verify that SMAJ5.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHM3/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 SMAJ5.0CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHM3/H?
All SMAJ5.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHM3/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 SMAJ5.0CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CAHM3/H Tags
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