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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3/I
- Part No.:
- SMAJ58CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,112
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Product details
Overview
SMAJ58CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 58 V stand-off voltage (VWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ58CAHM3/I datasheet, SMAJ58CAHM3/I pinout, SMAJ58CAHM3/I application, or SMAJ58CAHM3/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for bidirectional overvoltage protection where low clamping ratio, fast response (<1 ps), and MSL Level 1 reflow compatibility are required.
Technical Context
The SMAJ58CAHM3/I operates as a silicon avalanche diode configured in symmetrical (bidirectional) topology, enabling identical clamping behavior in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at VWM), while thermal resistance RθJA = 120 °C/W supports operation up to +150 °C junction temperature.
It delivers 400 W peak pulse power under standard 10/1000 μs surge conditions when mounted on 5.0 mm × 5.0 mm copper pads, derating linearly above 25 °C ambient per Fig. 2; clamping performance remains effective across repetitive surges at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown range ensuring reliable avalanche initiation within spec across production lot. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 400 W - Peak surge power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges when properly mounted. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports unidirectional fault current limiting in hybrid protection schemes. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with automated pick-and-place and J-STD-020 reflow. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no cathode band marking; terminals are symmetric and interchangeable. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; connects across protected line-to-line or line-to-ground without polarity constraint. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; copper pad layout per datasheet Fig. 6 ensures thermal dissipation and surge current path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TCT, and ESD. |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A material declarations; supports green manufacturing and end-of-life compliance. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) up to ±2 kV without degradation when PCB layout follows recommended pad dimensions. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during surge events - critical for protecting 60 V-rated MOSFETs and CAN transceivers. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; supports lead-free reflow up to 260 °C peak without popcorn or delamination risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to ±120 V) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between power rail and ground, responding within <1 ps to limit voltage excursion. Use Value: Prevents latch-up or gate oxide rupture in 60 V-rated power MOSFETs and microcontrollers by holding rail voltage ≤93.6 V during surge. | Use Scenario: Guarding analog inputs of pressure/temperature sensors connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: Line-to-line TVS on differential sensor outputs (e.g., RS-485, CAN FD) to absorb ESD and inductive switching noise. Use Value: Maintains signal integrity by clamping common-mode surges to <95 V while adding <0.5 pF capacitance - negligible impact on 1 Mbps data rates. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment (e.g., IP cameras, wireless access points) against lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before DC-DC converter stage; coordinated with upstream fuse and secondary TVS. Use Value: Absorbs 400 W surge energy without failure, enabling compliance with IEC 61000-4-5 Ed. 3, Level 4 (4 kV line-earth). | Use Scenario: Protecting USB 2.0 data lines and VBUS in portable speakers and smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional line-to-line suppressor on D+/D− and line-to-ground on VBUS, rated for ±15 kV contact discharge. Use Value: Limits ESD-induced voltage to <95 V across protected nodes, preventing damage to USB PHY transceivers and charging ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CAHE3/I | Same electrical specs and package; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; not certified for automotive under-hood deployment. | Select when halogen-free content is not mandated and automotive qualification is unnecessary. |
| SMBJ58CAHM3/I | Same VWM, VBR, VC; higher PPPM = 600 W; larger SMB (DO-214AA) package (5.28 mm × 4.57 mm). | Supports higher surge currents (6.4 A) and better thermal dissipation; requires larger PCB area. | Choose when system-level surge testing exceeds 400 W or board layout allows larger footprint. |
Compared with SMAJ58CAHM3/I, SMAJ58CAHE3/I offers identical protection performance without halogen-free or automotive qualification, while SMBJ58CAHM3/I provides 50% higher surge power handling in a physically larger package - enabling longer lifetime in high-duty-cycle industrial surge environments.
Availability
SMAJ58CAHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input circuits requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMAJ58CAHM3/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, efficiency, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability applications - particularly where bidirectional clamping, low clamping ratio, and automotive qualification are mandatory design requirements.
FAQ
What is the clamping voltage of SMAJ58CAHM3/I at its rated peak pulse current?
The SMAJ58CAHM3/I has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current (IPPM) of 4.3 A under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components experience no more than 93.6 V during standardized surge events - a critical parameter for validating compatibility with 60 V-rated ICs and MOSFETs in the same circuit as SMAJ58CAHM3/I.
Is SMAJ58CAHM3/I suitable for automotive applications?
Yes, SMAJ58CAHM3/I is AEC-Q101 qualified and specifically designed for automotive use. Its halogen-free, RoHS-compliant construction, MSL Level 1 rating, and validated performance across -55 °C to +150 °C junction temperature make it appropriate for engine control units, body electronics, and ADAS power domains. The "HM3" suffix confirms AEC-Q101 qualification and halogen-free status - a requirement explicitly verified for SMAJ58CAHM3/I in Vishay's official documentation.
How does the bidirectional configuration of SMAJ58CAHM3/I affect its PCB layout?
The SMAJ58CAHM3/I has no polarity marking due to its symmetrical bidirectional structure, allowing placement across any two nodes without orientation constraints - e.g., line-to-line or line-to-ground. Unlike unidirectional TVS diodes, SMAJ58CAHM3/I eliminates risk of reverse installation, simplifying assembly and reducing field failure modes. Its SMA (DO-214AC) footprint requires 5.0 mm × 5.0 mm copper pads per terminal to sustain full 400 W pulse rating - a layout rule directly specified for SMAJ58CAHM3/I in the Vishay datasheet.
What is the maximum steady-state power dissipation of SMAJ58CAHM3/I?
The SMAJ58CAHM3/I has a maximum steady-state power dissipation (PD) of 3.3 W at 50 °C ambient temperature on an infinite heatsink. This rating reflects continuous DC or low-frequency leakage power handling - distinct from its 400 W transient capability. In practice, SMAJ58CAHM3/I operates near zero steady-state dissipation under normal bias (leakage <1 μA at 58 V), making it suitable for always-on protection circuits without thermal derating concerns in typical ambient conditions.
Does SMAJ58CAHM3/I meet industry surge immunity standards such as IEC 61000-4-5?
Yes, SMAJ58CAHM3/I is engineered to support compliance with IEC 61000-4-5 Ed. 3 (surge immunity) when applied per recommended PCB layout and coordinated with system-level protection elements. Its 400 W peak pulse power rating corresponds to Level 4 (4 kV line-earth) testing using the 10/1000 μs waveform - a key requirement for industrial and automotive equipment. Full system-level validation must include trace impedance, grounding strategy, and upstream current limiting, but SMAJ58CAHM3/I provides the foundational clamping performance needed to pass IEC 61000-4-5 when correctly implemented.
SMAJ58CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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)
SMAJ58CAHM3/I FAQ
1.How can I place an order for SMAJ58CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3/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 SMAJ58CAHM3/I reliable?
The price and inventory of SMAJ58CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3/I?
SMAJ58CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3/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 SMAJ58CAHM3/I?
For technical support, including SMAJ58CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3/I requirements.
6.How does Aetrix verify that SMAJ58CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3/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 SMAJ58CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3/I?
All SMAJ58CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3/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 SMAJ58CAHM3/I part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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