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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3/H
- Part No.:
- SMAJ58CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
SMAJ58CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range (VBR), and clamps transients to ≤93.6 V at 4.3 A peak pulse current (IPPM) under 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ58CAHM3/H datasheet, SMAJ58CAHM3/H pinout, SMAJ58CAHM3/H application, or SMAJ58CAHM3/H equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for high-reliability 12 V/24 V automotive systems, with verified thermal resistance (RθJA = 120 °C/W), low leakage (<1.0 μA at VWM), and MSL Level 1 moisture sensitivity rating.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection against voltage transients induced by load dump, inductive switching, and ESD without polarity constraints. Its glass-passivated junction ensures stable clamping performance and fast response time (<1 ns), while the SMA package supports automated SMT placement and meets UL 94 V-0 flammability requirements.
The device delivers 400 W peak pulse power (10/1000 μs) up to 78 V and derates to 300 W above that threshold. With a maximum clamping voltage of 93.6 V at IPPM = 4.3 A and low incremental surge resistance, it provides precise overvoltage limiting for circuits where voltage margin between operating rail and IC absolute maximum ratings is tight.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse working voltage before conduction begins; sets safe operating margin for 12 V/24 V automotive systems. |
| VBR min/max | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | ≤93.6 V at 4.3 A - Clamping voltage defines worst-case overvoltage seen by protected ICs during 10/1000 μs surge events. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power rating determines survivability under standardized lightning/surge waveforms. |
| IPPM | 4.3 A - Peak surge current capability directly correlates to energy absorption (E = VC × ∫i dt) for system-level transient immunity. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments with minimal derating. |
| RθJA | 120 °C/W - Thermal resistance informs PCB copper pad design (0.2" × 0.2") required to maintain safe junction temperature at full power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals conduct identically during positive or negative surges; no cathode band marking required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS modules. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive environmental standards (e.g., JESD201 Class 2 whisker resistance) and end-of-life recycling requirements without compromising surge performance. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow soldering without moisture-induced popcorn failure - eliminates pre-bake requirement in high-volume SMT lines. |
| 400 W peak pulse power (10/1000 μs) | Provides industry-standard surge immunity per ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3/4 test compliance. |
| Low leakage (<1.0 μA at VWM) | Minimizes standby power loss and avoids false triggering in low-current sensor signal paths and always-on vehicle networks. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing surge energy before it reaches downstream ICs. Use Value: Limits voltage excursion to ≤93.6 V during 4.3 A transients, preserving integrity of 3.3 V/5 V logic supplies and preventing latch-up in automotive MCUs. |
Use Scenario: Safeguarding analog outputs and digital I/O of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and EMI. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy on 4–20 mA or RS-485 signal pairs to common ground. Use Value: Maintains signal fidelity with <1.0 μA leakage at 58 V, while clamping ESD events (IEC 61000-4-2 ±8 kV contact) within safe voltage margins for precision ADC front-ends. |
| Telecom Equipment DC Input Protection | Consumer Device USB/Power Port Protection |
Use Scenario: Securing 48 V PoE-powered switches and base stations against lightning-induced surges on primary DC input lines. IC Role / Device Role / Timing Role: Primary-stage TVS mounted at board edge, coordinating with upstream fuses and secondary-stage polymer PTCs. Use Value: Absorbs 400 W pulses without degradation, enabling compliance with Telcordia GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Hardening USB-C PD port and auxiliary power inputs in smart home hubs against user-induced ESD and hot-plug transients. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp placed between VBUS and GND, sized to handle repetitive 10/1000 μs surges from faulty chargers. Use Value: Delivers consistent clamping at 93.6 V with no parameter drift after >1000 surge events, extending field lifetime versus standard Zener-based solutions. |
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/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable for commercial-automotive hybrids where halogen content is unrestricted. | Select when cost optimization is prioritized and halogen-free compliance is not mandated by OEM tier-1 requirements. |
| SMBJ58CAHM3 | Same VWM/VC but in larger SMB (DO-214AA) package; higher PPPM = 600 W; RθJA = 85 °C/W. | Better thermal performance and surge margin, but requires larger PCB footprint and may not fit space-constrained layouts. | Choose when system-level surge testing exceeds 400 W or ambient temperatures exceed 105 °C, and board area permits SMB footprint. |
Compared with SMAJ58CAHM3/H, SMAJ58CAHE3/H offers identical protection performance at lower material cost but lacks halogen-free certification, while SMBJ58CAHM3 trades compactness for enhanced power handling and thermal robustness - making SMAJ58CAHM3/H optimal for space-limited AEC-Q101 applications requiring strict environmental compliance.
Availability
SMAJ58CAHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power entry points requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMAJ58CAHM3/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for transient overvoltage protection in harsh environments, emphasizing AEC-Q101 qualification, stable clamping, and SMT manufacturability in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ58CAHM3/H under a 10/1000 μs surge?
The SMAJ58CAHM3/H clamps to a maximum of 93.6 V at its rated peak pulse current of 4.3 A under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 88390, ensuring predictable overvoltage limiting for protected circuitry during surge events.
Is SMAJ58CAHM3/H suitable for automotive applications?
Yes, SMAJ58CAHM3/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It meets automotive requirements for temperature cycling, humidity testing, and surge immunity - commonly used in engine control modules, body controllers, and infotainment power supplies where reliability under under-hood conditions is critical.
How does the bidirectional configuration of SMAJ58CAHM3/H affect its circuit implementation?
The bidirectional configuration of SMAJ58CAHM3/H means it conducts identically in both polarities, eliminating the need for polarity-aware placement on PCBs. Unlike unidirectional TVS diodes, SMAJ58CAHM3/H has no cathode marking and protects AC-coupled lines or DC rails subject to reverse-polarity transients - simplifying layout and reducing BOM count in dual-rail or floating-ground systems.
What is the maximum operating temperature for SMAJ58CAHM3/H?
The SMAJ58CAHM3/H has a maximum junction temperature (TJ) of +150 °C and operates across a storage and junction temperature range of –55 °C to +150 °C. Its thermal resistance (RθJA = 120 °C/W) requires appropriate PCB copper pad design (0.2" × 0.2" per terminal) to sustain full 400 W pulse power without exceeding TJ limits in high-ambient environments.
Does SMAJ58CAHM3/H require special handling during reflow soldering?
No - SMAJ58CAHM3/H is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C for lead-free processes without preconditioning. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, enabling robust wetting and intermetallic formation in standard SMT assembly lines without pre-bake or dry-pack requirements.
SMAJ58CAHM3/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):
- 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/H FAQ
1.How can I place an order for SMAJ58CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3/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 SMAJ58CAHM3/H reliable?
The price and inventory of SMAJ58CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3/H?
SMAJ58CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3/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 SMAJ58CAHM3/H?
For technical support, including SMAJ58CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3/H requirements.
6.How does Aetrix verify that SMAJ58CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3/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 SMAJ58CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3/H?
All SMAJ58CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3/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 SMAJ58CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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