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Vishay General Semiconductor - Diodes Division SA85CA-E3/54
- Part No.:
- SA85CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA85CA-E3/54.pdf
- Description:
- TVS DIODE 85VWM 137VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
SA85CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 5.0 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 137 V maximum clamping voltage at 3.6 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA85CA-E3/54 datasheet, SA85CA-E3/54 pinout, SA85CA-E3/54 application, or SA85CA-E3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, 175 °C max junction temperature, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 for ESD and surge protection in automotive sensor interfaces and industrial control inputs.
Technical Context
The SA85CA-E3/54 operates as a silicon avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and stable clamping under repetitive transient stress. Its bidirectional symmetry ensures identical electrical behavior in both polarities, eliminating polarity marking on the DO-15 body.
It delivers 500 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, with thermal derating above 25 °C per Fig. 2 and steady-state power dissipation of 3.0 W on infinite heatsink at TL = 75 °C. The device supports operating junction temperatures from –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry |
| VBR min/max | 94.4 V / 104 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 137 V at 3.6 A - Clamped voltage seen by downstream ICs during 10/1000 μs surge; limits stress on sensitive nodes |
| PPPM | 500 W - Peak transient energy absorption capacity; meets IEC 61000-4-5 Level 4 (4 kV) surge requirements |
| ID @ VWM | 1.0 μA - Reverse leakage at rated stand-off; negligible current draw in normal operation, preserving signal integrity |
| TJ max | +175 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
SA85CA-E3/54 is housed in a DO-15 (DO-204AC) axial-leaded package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no cathode marking; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; clamps to VBR when voltage exceeds threshold |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; identical clamping behavior due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche performance across temperature and lifetime; eliminates surface degradation risks |
| 500 W peak pulse power (10/1000 μs) | Supports high-energy surge suppression without failure-critical for CAN bus, LIN, and sensor supply line protection |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, ADAS sensors, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V/5 V logic |
| UL 94 V-0 molded epoxy | Ensures flame-retardant housing suitable for enclosed industrial and automotive assemblies requiring safety certification |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting analog voltage outputs of pressure, temperature, or position sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input or op-amp buffer. Use Value: Limits transient voltage to ≤137 V during 10/1000 μs surges, preventing latch-up or damage to 5 V-tolerant front-end circuitry while maintaining <1.0 μA leakage at 85 V nominal supply. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, mounted upstream of optocoupler or Schmitt trigger interface. Use Value: Absorbs up to 500 W surge energy without degradation, enabling reliable operation in factory-floor environments where >1 kV transients occur daily. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary-level TVS placed adjacent to connector, complementing primary gas discharge tube (GDT) protection. Use Value: Responds within nanoseconds to clamp residual transients after GDT firing, limiting voltage to 137 V and protecting ±12 V transceiver rails. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to MCU GPIOs or relay drivers. IC Role / Device Role / Timing Role: Low-leakage bidirectional suppressor across motor winding terminals or across H-bridge supply rails. Use Value: Withstands repeated 8.3 ms half-sine surges up to 70 A (IFSM), ensuring longevity in high-duty-cycle appliance applications without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | DO-214AA (SMB) package; same VWM/VBR/PPPM specs but higher thermal mass and lower lead inductance | Better suited for PCB space-constrained designs requiring surface-mount assembly and improved high-frequency clamping | Select SMBJ85CA when automated SMT placement, reduced board area, or tighter layout control over parasitic inductance is required |
| P6KE85CA | DO-15 package, same footprint; lower PPPM (600 W vs. 500 W), higher VC (145 V vs. 137 V), wider VBR tolerance (91–109 V) | Higher clamping voltage reduces protection margin for 5 V systems but offers greater single-pulse energy headroom | Choose P6KE85CA only if legacy design reuse or higher single-event surge margin outweighs tighter clamping needs |
Compared with SMBJ85CA and P6KE85CA, the SA85CA-E3/54 provides optimal balance of AEC-Q101 qualification, precise 137 V clamping, and proven DO-15 reliability for through-hole automotive and industrial deployments-without requiring PCB rework or compromising on leakage or temperature stability.
Availability
SA85CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC input stages, telecom line protection, and consumer appliance motor drive circuits requiring stable component supply and full traceability.
Supply support for SA85CA-E3/54 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 TVS devices with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxCA series targets robust transient suppression in harsh environments, with design focus on automotive AEC-Q101 compliance, low clamping voltage, and consistent performance across –55 °C to +175 °C.
FAQ
What is the clamping voltage of SA85CA-E3/54 at its rated peak pulse current?
The SA85CA-E3/54 has a maximum clamping voltage (VC) of 137 V at its rated peak pulse current (IPPM) of 3.6 A under a 10/1000 μs waveform. This value is measured per Figure 9 in the Vishay datasheet 88378 and reflects the actual voltage imposed on protected circuitry during standardized surge events-critical for verifying compatibility with downstream 5 V or 3.3 V ICs.
Is SA85CA-E3/54 suitable for automotive applications?
Yes, SA85CA-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its DO-15 package, 175 °C maximum junction temperature, and validated performance across temperature cycling, high-temperature reverse bias (HTRB), and ESD testing make it appropriate for engine control modules, body electronics, and ADAS sensor interfaces where reliability under thermal and electrical stress is mandatory.
Does SA85CA-E3/54 have polarity markings on the package?
No, SA85CA-E3/54 does not feature polarity markings because it is a bidirectional TVS diode. Both terminals behave identically under positive or negative transients, and the DO-15 body carries no color band or other indicator-unlike unidirectional variants such as SA85A-E3/54, which use a cathode band.
What is the maximum reverse leakage current for SA85CA-E3/54 at its stand-off voltage?
The maximum reverse leakage current (ID) for SA85CA-E3/54 is 1.0 μA at its rated stand-off voltage (VWM) of 85 V and TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and avoids loading effects in precision analog circuits protected by the SA85CA-E3/54.
Can SA85CA-E3/54 be used in place of SA85A-E3/54?
No-SA85CA-E3/54 is bidirectional while SA85A-E3/54 is unidirectional, meaning they differ fundamentally in polarity behavior and circuit integration. Substituting SA85CA-E3/54 for SA85A-E3/54 may cause improper clamping in DC-biased lines; always verify system polarity requirements and consult the SA85CA-E3/54 datasheet section "Polarity" before replacement.
SA85CA-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA85CA-E3/54 FAQ
1.How can I place an order for SA85CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA85CA-E3/54 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 SA85CA-E3/54 reliable?
The price and inventory of SA85CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA85CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA85CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA85CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA85CA-E3/54?
SA85CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA85CA-E3/54 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 SA85CA-E3/54?
For technical support, including SA85CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA85CA-E3/54 requirements.
6.How does Aetrix verify that SA85CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA85CA-E3/54 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 SA85CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA85CA-E3/54?
All SA85CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA85CA-E3/54, 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 SA85CA-E3/54 part is unused and in its original packaging.
Return procedure for SA85CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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