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Vishay General Semiconductor - Diodes Division SMA5J12CAHE3/61
- Part No.:
- SMA5J12CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12CAHE3/61.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J12CAHE3/61 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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 25.1 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to safeguard automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMA5J12CAHE3/61 datasheet, SMA5J12CAHE3/61 pinout, SMA5J12CAHE3/61 application, or SMA5J12CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant HE3 suffix, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, with low incremental surge resistance enabling stable clamping under repetitive surges.
The SMA5J12CAHE3/61 is rated for non-repetitive 10/1000 μs pulses up to 500 W and supports operating junction temperatures from –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 19.9 V at 25.1 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W - peak pulse power handling capacity; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; molded case meets UL 94 V-0; terminals are matte tin plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally through the same junction - no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 10605 ESD), improving clamping precision and system robustness. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - simplifies manufacturing and reduces assembly risk. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for harsh-environment deployments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps to ≤19.9 V during 25.1 A surge, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends while meeting ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input rails to absorb repetitive 500 W surges without degradation. Use Value: Maintains <1 μA leakage at 12 V VWM, ensuring minimal impact on input threshold detection while surviving >1000 surges per IEC 61000-4-5. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and RS-485 termination networks in base station equipment. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping element limiting transient overvoltage to protect isolated DC/DC converters and level-shifters. Use Value: Delivers 19.9 V clamping at 25.1 A with <25 °C/W junction-to-lead thermal resistance - enabling compact heatsink-free layout in space-constrained modules. |
Use Scenario: Input-stage transient suppression in USB-C PD adapters and smart home AC/DC power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line TVS placed after bridge rectifier to clamp differential-mode surges before bulk capacitor and controller IC. Use Value: Withstands 40 A IFSM (unidirectional reference) and 150 °C TJ max, supporting high-reliability operation in thermally dense power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; differs only in molding compound composition. | No functional difference in surge performance or thermal behavior; selected when halogen-free compliance is mandated by OEM or regional regulations. | Choose SMA5J12CA-M3/61 if halogen-free material requirement applies; otherwise SMA5J12CAHE3/61 offers full AEC-Q101 + RoHS compliance in standard commercial grade. |
| SMC5J12CAHE3/61 | Larger SMC (DO-214AB) package with higher thermal mass; same VWM/VBR/VC ratings but 1500 W PPPM and 72.5 A IPPM due to improved heat dissipation. | Used where higher surge energy handling is needed (e.g., main power rail protection); requires larger PCB footprint and different pad layout. | Select SMA5J12CAHE3/61 for space-constrained designs requiring 500 W protection; choose SMC5J12CAHE3/61 only when >500 W surge immunity is required and board area permits. |
Compared with SMA5J12CA-M3/61, the SMA5J12CAHE3/61 shares identical clamping behavior and automotive qualification but uses standard RoHS-compliant epoxy instead of halogen-free material; versus SMC5J12CAHE3/61, it trades 3× lower PPPM for 40% smaller footprint - making it optimal for dense sensor node layouts where 500 W surge margin suffices.
Availability
SMA5J12CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 traceability, and RoHS compliance.
Supply support for SMA5J12CAHE3/61 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 SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in automotive, industrial, and communications infrastructure where fast response, repeatable clamping, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SMA5J12CAHE3/61 at its rated peak pulse current?
The SMA5J12CAHE3/61 has a maximum clamping voltage (VC) of 19.9 V at its specified peak pulse current (IPPM) of 25.1 A, measured using a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J12CAHE3/61 achieves this clamping performance while maintaining low incremental surge resistance, ensuring predictable behavior under real-world transients.
Is the SMA5J12CAHE3/61 suitable for automotive applications?
Yes, the SMA5J12CAHE3/61 is AEC-Q101 qualified and explicitly intended for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass passivated junctions, matte tin-plated leads compliant with JESD 22-B102, and MSL Level 1 rating - all validated per automotive reliability standards. The SMA5J12CAHE3/61 also supports operating junction temperatures up to +150 °C, meeting under-hood environmental requirements.
Does the SMA5J12CAHE3/61 have polarity markings?
No, the SMA5J12CAHE3/61 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J12A), which feature a cathode band, the SMA5J12CAHE3/61 exhibits symmetrical electrical characteristics in both directions and is marked only with its device code (e.g., "5BE") on the package body. This eliminates orientation concerns during automated placement and simplifies PCB layout.
What is the thermal resistance of the SMA5J12CAHE3/61?
The SMA5J12CAHE3/61 has a typical junction-to-lead thermal resistance (RθJL) of 25 °C/W and a junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values are critical for estimating temperature rise during surge events and ensuring the device remains within its 150 °C maximum junction temperature limit. The SMA5J12CAHE3/61 relies on PCB copper as its primary heat sink.
How does the SMA5J12CAHE3/61 differ from the unidirectional SMA5J12AHE3/61?
The SMA5J12CAHE3/61 is bidirectional with identical clamping behavior in both polarities and no cathode marking, whereas the SMA5J12AHE3/61 is unidirectional, features a cathode band, and conducts forward surge current only in one direction (IFSM = 40 A). Both share the same VWM (12 V), VBR (13.3–14.7 V), VC (19.9 V), and PPPM (500 W), but the SMA5J12CAHE3/61 is preferred for AC-coupled or floating signal lines where polarity reversal may occur.
SMA5J12CAHE3/61 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 25.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J12CAHE3/61 FAQ
1.How can I place an order for SMA5J12CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12CAHE3/61 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 SMA5J12CAHE3/61 reliable?
The price and inventory of SMA5J12CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J12CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12CAHE3/61?
SMA5J12CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12CAHE3/61 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 SMA5J12CAHE3/61?
For technical support, including SMA5J12CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12CAHE3/61 requirements.
6.How does Aetrix verify that SMA5J12CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12CAHE3/61 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 SMA5J12CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12CAHE3/61?
All SMA5J12CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12CAHE3/61, 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 SMA5J12CAHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J12CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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