Collector Terminal: Voltage Rating 600-6500 V

Component Specifications

Definition

The collector terminal is a critical component in power semiconductor devices such as Insulated Gate Bipolar Transistors (IGBTs) and Silicon Controlled Rectifiers (SCRs). It serves as the electrical interface to the collector region, which is the primary current-carrying layer in these devices. The terminal is designed to handle high current densities (typically 100-600 A/cm²) and voltages (up to 6.5 kV for IGBTs), while facilitating efficient heat transfer to external cooling systems. It connects internally to the collector metallization layer and externally to the circuit via soldering, wire bonding, or press-fit connections. The design must ensure low electrical resistance (<1 mΩ), high thermal conductivity (>200 W/m·K), and mechanical stability under thermal cycling conditions.

Working Principle

The collector terminal operates by providing a low-resistance path for majority carriers (electrons in N-type, holes in P-type) to enter or exit the collector region. In IGBTs, it collects electrons from the emitter during conduction; in SCRs, it serves as the anode terminal for current flow. The terminal's material and geometry minimize voltage drop and Joule heating, while its thermal interface dissipates heat generated in the semiconductor junction to prevent thermal runaway.

Materials

Oxygen-free high-conductivity (OFHC) copper (C10100/C10200) with nickel or silver plating (2-5 μm thickness), aluminum alloy (6061-T6) for lightweight applications, or copper-molybdenum-copper (CMC) clad materials for thermal expansion matching. Plating specifications: MIL-DTL-45204 for electroplating, ASTM B488 for electroless nickel.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Current Rating	50-1200 A
Voltage Rating	600-6500 V
Mechanical Life	>1000 cycles
Contact Resistance	<0.5 mΩ
Insulation Voltage	2500 VAC (min)
Thermal Resistance	<0.1 °C/W
Operating Temperature	-55 to +175 °C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 16750-4, DIN EN 60068-2-14, IEC 60747-9

Parent Products

This component is used in the following industrial products

Power Semiconductor Devices (IGBTs/SCRs)

Power semiconductor components (IGBTs/SCRs) for high-voltage, high-current switching and control in industrial applications.

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Engineering Analysis

Risks & Mitigation

Thermal fatigue from cycling
Electromigration at high current density
Galvanic corrosion in humid environments
Mechanical stress from mounting
Creep in solder joints

FMEA Triads

Trigger: Thermal cycling exceeding material CTE mismatch
Failure: Crack formation in solder or bonding interface
Mitigation: Use CMC clad materials, implement strain-relief designs, and control soldering profile (peak temp 240-260°C)

Trigger: High current density (>300 A/cm²) with insufficient cooling
Failure: Localized overheating and metallization degradation
Mitigation: Increase terminal cross-section, use forced air/liquid cooling, and apply thermal interface materials with >3 W/m·K conductivity

Trigger: Vibration in mobile applications
Failure: Terminal loosening or fracture
Mitigation: Implement lock washers, thread-locking compounds, and press-fit designs with 0.05-0.10 mm interference fit

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for critical dimensions, ±5% for electrical resistance, flatness within 0.05 mm over contact area

Test Method

IEC 60068-2-21 for vibration, MIL-STD-202 for shock, IPC-TM-650 for solderability, ASTM B539 for contact resistance

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

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Supplier transparency

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Manufacturers of Collector Terminal

Manufacturer profiles associated with Collector Terminal.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between collector and emitter terminals in IGBTs?

The collector terminal connects to the high-voltage side and handles majority carrier collection, while the emitter terminal connects to the low-voltage side and controls minority carrier injection. Collector terminals are typically larger for heat dissipation.

Can collector terminals be interchanged between IGBTs and SCRs?

Not directly. IGBT collector terminals are optimized for fast switching and bidirectional current, while SCR anode terminals are designed for unidirectional, high-surge current applications. Material and plating specifications differ.

How does terminal plating affect performance?

Silver plating reduces contact resistance and improves solderability but oxidizes; nickel plating provides corrosion resistance but increases resistance. Gold flash over nickel offers the best balance for high-reliability applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Collector Terminal